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PEN US Equity

Penumbra IncHealth Care · Surgical & Medical Instruments & Apparatus · CIK 1321732 · FY ends Dec 31
$326.84
+2.09 (+0.64%)
USD · as of 2026-08-19 · marketstack

PEN · 10-K · period ended 2025-12-31

← all PEN documents
filed 2026-02-25 · EDGAR original ↗

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pen-20251231

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2025

or

For the transition period from _____ to _____

Commission file number: 001-37557

Penumbra, Inc.

(Exact Name of Registrant as Specified in Its Charter)

One Penumbra Place

Alameda, CA94502

(Address of principal executive offices, including zip code)

(510) 748-3200

(Registrant’s telephone number, including area code)

Securities registered pursuant of Section 12(b) of the Act:

Title of each class Trading Symbol Name of each exchange on which registered

Common Stock, Par value $0.001 per share PEN The New York Stock Exchange

Securities registered pursuant of Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes: x No: o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes: oNo: x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes: x No: o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes: x No: o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x Accelerated filer o

Non-accelerated filer o Smaller reporting company o

Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C.7262(b)) by the registered public accounting firm that prepared or issued its audit report. x

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. o

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes: ☐ No: x

As of June 30, 2025, the aggregate market value of the registrant’s common stock held by non-affiliates was approximately $9.7 billion, based on the closing price as reported on the New York Stock Exchange as of such date.

As of February 4, 2026, the registrant had 39,243,053 shares of common stock, par value $0.001 per share, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement for its 2026 annual meeting of stockholders, which is to be filed not more than 120 days after the registrant’s fiscal year ended December 31, 2025, are incorporated by reference into Part III of this Annual Report on Form 10-K.

Table of Contents

Penumbra, Inc.

FORM 10-K

TABLE OF CONTENTS

Page

PART I

Item 1. Business. 5

Item 1A. Risk Factors. 21

Item 1B. Unresolved Staff Comments. 49

Item 1C. Cybersecurity 49

Item 2. Properties. 49

Item 3. Legal Proceedings. 50

Item 4. Mine Safety Disclosures. 51

PART II

Item 6. [Reserved] 54

Item 7A. Quantitative and Qualitative Disclosures About Market Risk. 66

Item 8. Financial Statements and Supplementary Data. 67

Item 9A. Controls and Procedures. 108

Item 9B. Other Information. 109

PART III

Item 10. Directors, Executive Officers and Corporate Governance. 110

Item 11. Executive Compensation. 110

Item 14. Principal Accountant Fees and Services. 110

PART IV

Item 15. Exhibits and Financial Statement Schedules. 111

Signatures

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FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K (this “Form 10-K”) includes forward-looking statements in addition to historical information. These forward-looking statements are included throughout this Form 10-K, including in the sections entitled “Business,” “Risk Factors,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and in other sections of this Form 10-K. In some cases, you can identify these statements by forward-looking words such as “may,” “might,” “will,” “should,” “expects,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential,” “opportunity” or “continue,” the negative of these terms and other comparable terminology, but such words, terms and terminology are not the exclusive means for identifying such statements. These forward-looking statements, which are subject to risks, uncertainties and assumptions about us, may include projections of our future financial performance, our anticipated growth strategies and anticipated trends in our business.

These statements are only predictions based on our current expectations and projections about future events. There are important factors that could cause our actual results, level of activity, performance or achievements to differ materially from the results, level of activity, performance or achievements expressed or implied by the forward-looking statements, including those factors discussed in the section entitled “Risk Factors” in this Form 10-K. You should specifically consider the numerous risks outlined in the section of this Form 10-K entitled “Risk Factors.” Although we believe the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, level of activity, performance or achievements. We undertake no obligation to update any forward-looking statements made in this Form 10-K to reflect events or circumstances after the date of this Form 10-K or to reflect new information or the occurrence of unanticipated events, except as required by law.

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RISK FACTORS SUMMARY

Our business is subject to numerous risks and uncertainties, including those highlighted in the section entitled “Risk Factors” in Part I, Item IA of this Form 10-K. These risks include, but are not limited to, the following:

•uncertainty associated with our agreement to be acquired by Boston Scientific Corporation;

•the failure to complete the Merger could adversely affect our business;

•we will continue to incur substantial transaction-related costs in connection with the Merger;

•we and our directors and officers may be subject to lawsuits relating to the Merger;

•provisions of the Merger Agreement may deter alternative business combinations and could negatively impact our stock price if the Merger Agreement is terminated in certain circumstances;

•because the market price of Boston Scientific Corporation common stock may fluctuate, holders of our common stock cannot be certain of the market value of the consideration they will receive in the Merger;

•our existing products may be rendered obsolete and we may be unable to effectively introduce and market new products or may fail to keep pace with advances in technology;

•we face significant competition, and if we are unable to compete effectively, we may not be able to achieve or maintain significant market penetration or improve our results of operations;

•we may not be able to achieve or maintain satisfactory pricing and margins for our products;

•our future growth depends, in part, on our ability to further penetrate our current customer base and increase the frequency of use of our products by our customers as well as expand our user base to include additional specialist physicians and other healthcare providers in both our existing and future target end markets;

•we may not have the resources to successfully market and sell our products, which would adversely affect our business and results of operations;

•third-party reimbursement may not be available or adequate for the procedures or sessions for which our products are used, and may be subject to change;

•we have generated a significant portion of our revenue and revenue growth from a limited number of product families, and our revenue and business prospects would be adversely affected if sales of any of these product families were to decline;

•if specialist physicians or other healthcare providers do not recommend and endorse, or use, our products or if our relationships with specialist physicians or other healthcare providers deteriorate, our products may not be accepted or maintain acceptance in the marketplace, which would adversely affect our business and results of operations;

•our dependence on key suppliers puts us at risk of interruptions in the availability of our products, which could reduce our revenue and adversely affect our results of operations;

•we cannot be certain that we will be able to manufacture our products in high volumes at commercially reasonable costs;

•we are required to maintain high levels of inventory, which consume a significant amount of our working capital and could lead to permanent write-downs or write-offs of our inventory;

•defects or failures or alleged defects or failures associated with our products could lead to recalls, safety alerts, or product-related or securities litigation, as well as significant costs and negative publicity;

•our products are continually the subject of clinical trials conducted by us, our competitors, or other third parties, the results of which may be unfavorable, or perceived as unfavorable, which could materially adversely affect our business, financial condition and results of operations;

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•we are subject to stringent domestic and foreign medical device regulations, which may impede the approval or clearance process for our products, hinder our development activities and manufacturing processes and, in some cases, result in the recall or seizure of previously approved or cleared products;

•we are subject to federal, state and foreign healthcare laws and regulations that could result in significant liability, require us to change our business practices and restrict our operations in the future;

•we rely on a variety of intellectual property rights, and if we are unable to maintain or protect our intellectual property, our business and results of operations will be harmed; and

•we may become involved in lawsuits or other proceedings to protect or enforce our patents or other intellectual property rights or to defend against accusations of infringement, which could be expensive, time consuming and unsuccessful.

The above list represents a summary of the risks that could affect our business, financial condition, results of operations, cash flows and the trading price of our common stock. Additional information regarding such risks may be found in the section of this Form 10-K entitled “Risk Factors,” and you should carefully review and consider such risk factors in addition to the above summary. Additional risks not presently known to us or that we currently deem immaterial may also impair our business operations. Our business, financial condition, results of operations and future prospects could be materially and adversely harmed by any of these risks.

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PART I

ITEM 1. BUSINESS.

Overview

References herein to “we,” “us,” “our,” the “Company,” and “Penumbra,” refer to Penumbra, Inc. and its consolidated subsidiaries unless expressly indicated or the context requires otherwise.

Penumbra, the world’s leading thrombectomy company, is focused on developing the most innovative technologies for challenging medical conditions such as ischemic stroke, venous thromboembolism such as pulmonary embolism, and acute limb ischemia. Our broad portfolio, which includes computer assisted vacuum thrombectomy (CAVT), centers on removing blood clots from head-to-toe with speed, safety, and simplicity. Our team focuses on developing, manufacturing and marketing novel products for use by specialist physicians and other healthcare providers to drive improved clinical and health outcomes. We believe that the cost-effectiveness of our products is attractive to our customers.

Since our founding in 2004, we have invested heavily in our product development and commercial expansion that has established the foundation of our global organization. We have successfully developed, obtained regulatory clearance or approval for, and introduced products into the thrombectomy market since 2007, access market since 2008, embolization market since 2011, and neurosurgical market since 2014.

We expect to continue to develop and build our portfolio of products, including our thrombectomy, embolization, and access technologies, while iterating on our currently available products. Generally, when we introduce a next generation product or a new product designed to replace a current product, sales of the earlier generation product or the product replaced decline. Our research and development activities are centered around the development of new products and clinical activities designed to support our regulatory submissions and demonstrate the effectiveness of our products.

We attribute our success to our culture built on cooperation, our highly efficient product innovation process, our disciplined approach to product and commercial development, our deep understanding of our target end markets and our relationships with specialist physicians and other healthcare providers. We believe these factors have enabled us to rapidly innovate in a highly efficient manner.

We sell our products to healthcare providers primarily through our direct sales organization in the United States, most of Europe, Canada, Australia and Singapore, as well as through distributors in select international markets. We generated revenue of $1,403.7 million, $1,194.6 million and $1,058.5 million for the years ended December 31, 2025, 2024 and 2023, respectively. This represents an annual increase of 17.5% and 12.9%, respectively. We generated income from operations of $189.2 million, $9.3 million and $73.6 million for the years ended December 31, 2025, 2024 and 2023, respectively.

During the year ended December 31, 2024, we made the strategic decision to wind down and exit our immersive healthcare business, and as a result we incurred $115.3 million in impairment and other charges in connection with this decision. Refer to Note “4. Exit of Immersive Healthcare Business” to our consolidated financial statements in Part II, Item 8 of this Form 10-K. In addition, during the year ended December 31, 2024, we permanently ceased sales of our immersive healthcare products and related commercial operations. There were no impairment or other charges in connection with the wind down and exit of our immersive healthcare business during the year ended December 31, 2025.

On January 14, 2026, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Boston Scientific Corporation, a Delaware corporation, and Pinehurst Merger Sub, Inc. (“Merger Sub”), a Delaware corporation and a wholly owned subsidiary of Boston Scientific Corporation, pursuant to which Boston Scientific Corporation has agreed to acquire us in a transaction (the “Merger”) reflecting an enterprise value of approximately $14.5 billion. Under the terms of the Merger Agreement, which has been approved by the board of directors of each of the Company and Boston Scientific Corporation, the transaction values each share of our common stock at $374 per share, with our stockholders having the right to elect, for each share of our common stock held by them, to receive $374 in cash or 3.8721 shares of Boston Scientific Corporation’s common stock (valued at $374 based on the volume weighted average price of Boston Scientific Corporation’s common stock over the 10 trading days ending January 13, 2026), subject to proration, so that the total transaction consideration is paid approximately 73% in cash and approximately 27% in shares of Boston Scientific Corporation’s common stock. The Merger is expected to close by the end of 2026, subject to customary closing conditions, including approval by our stockholders and regulatory approvals. See Note “20. Subsequent Events” to our consolidated financial statements in Part II, Item 8 of this Form 10-K for more information.

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Our Markets

We concentrate on improving treatment outcomes for patients with certain forms of vascular disease. Vascular disease refers to any condition that affects the circulatory system and typically manifests as a blockage or rupture of an artery or a vein. When the treatment for vascular disease is performed from within a vessel, it is referred to as an endovascular procedure. Historically, we classified our end markets according to the anatomic location of the disorder and divided them into neuro, which included neurovascular and neurosurgical, and vascular, which included peripheral vascular and cardiovascular. To better align with our strategic priorities, beginning with the three months ended December 31, 2023 we began to classify our end markets based on the type of procedure being performed, and therefore divide our markets into thrombectomy, which includes products that treat conditions such as pulmonary embolism, deep vein thrombosis, acute limb ischemia, ischemic stroke and coronary disease, and embolization and access, which include products to treat aneurysms and to occlude vessels as well as products to access the vasculature.

We generated revenue of $947.9 million, $815.5 million and $677.3 million from our thrombectomy product category for the years ended December 31, 2025, 2024 and 2023, respectively. We generated revenue of $455.7 million, $379.1 million, and $381.2 million from our embolization and access product categories for the years ended December 31, 2025, 2024 and 2023, respectively. The Company designs, develops, manufactures and markets novel products, and operates as one operating segment.

While reliable third-party data is not available for many markets outside the United States, we believe there are substantial additional market opportunities for our thrombectomy and embolization and access products throughout the world.

Thrombectomy Market

The thrombectomy market is comprised of vascular diseases and disorders occurring in vessels throughout the body, including ischemic stroke, venous thromboembolism such as pulmonary embolism, acute limb ischemia, deep vein thrombosis, coronary disease and other conditions. Disruption of blood flow to the vasculature can have serious adverse consequences, including death and morbidity, and our solutions address the intervention of these diseases. There are approximately 2.15 millionincidences of clot in the vasculature each year in the United States, the vast majority of which do not currently receive mechanical thrombectomy intervention. Studies have shown that patients treated with mechanical thrombectomy had improved functional outcomes compared with treatments such as tissue-type plasminogen activator (tPA) alone.

Some of the more common conditions we focus on are:

•Pulmonary Embolism (“PE”): PE is a condition that occurs when blood clots, which typically travel from the veins in the legs, get caught in the lungs. Approximately 1.2 million PEs occur annually worldwide. In the U.S., there are approximately 350,000 PEs per year causing approximately 50,000 annual deaths according to the Centers for Disease Control and Prevention. High- and intermediate-risk PEs, which are generally eligible for treatment with mechanical or computer assisted vacuum thrombectomy, represent approximately 44% of such PEs, or approximately 150,000 U.S. patients. We estimate there are approximately 800,000 annual PEs outside the U.S. and approximately 350,000 of them are high- or intermediate-risk, making them eligible for thrombectomy.

•Deep Vein Thrombosis(“DVT”): DVT occurs when a clot forms in a deep vein, usually in the leg and sometimes in the arm. Approximately 4 million DVTs occur annually worldwide. In the U.S., there are approximately 30,000 annual deaths caused by DVT according to the Centers for Disease Control and Prevention. Approximately 350,000 DVTs are eligible for treatment with mechanical or computer assisted vacuum thrombectomy in the U.S. We estimate there are approximately 2 million annual DVTs outside the U.S. that are eligible for thrombectomy.

•Acute Limb Ischemia (“ALI”):ALI occurs when the leg experiences an occlusion in an artery, caused either by a blood clot in the artery or by emboli from the heart or another place within the body that travel to the leg and cause an occlusion. It is estimated that approximately 2.5 million ALIs occur annually and that there are approximately 16 million ALI survivors worldwide. In the U.S., there are approximately 250,000 ALIs per year, which are generally eligible for treatment with mechanical or computer assisted vacuum thrombectomy, causing approximately 50,000 annual deaths according to the New England Journal of Medicine. We estimate there are approximately 2.25 million annual ALIs outside the U.S. that are eligible for thrombectomy.

•Ischemic Stroke: A stroke occurs when a blood vessel that carries oxygen and nutrients to the brain is either blocked by a clot or bursts (ruptures). It is estimated that nearly 14 million strokes occur annually and that there are more than 80 million survivors of stroke globally. In the United States, the American Heart Association (“AHA”) and American Stroke Association (“ASA”) estimate that nearly 800,000 strokes occur annually, and lead to approximately 150,000 deaths per year. Ischemic strokes, caused by the blockage of an artery in the brain,

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represent approximately 87% of strokes, or approximately 700,000 patients annually, in the United States. Of these cases, we estimate that approximately 200,000 are treatable with mechanical thrombectomy, which involves removal of the clot causing the blockage by mechanical means and restoring blood flow to the blocked vessels. Outside of the United States, we estimate, based on published sources, that there are approximately 9.7 million ischemic strokes annually and that 1.9 million of these patients are treatable with mechanical thrombectomy.

•Acute Coronary Syndrome (“ACS”): ACS includes various conditions associated with sudden, reduced blood flow to the heart. One such condition is a heart attack (acute myocardial infarction or “AMI”), when cell death results in damaged or destroyed heart tissue. Heart attacks can often be associated with high thrombus burden in the coronary arteries. Approximately 8.5 million AMIs occur annually and there are approximately 23.5 million AMI survivors worldwide. In the U.S., there are approximately 500,000 AMIs per year causing approximately 350,000 annual deaths according to the American Heart Association. AMIs involving high thrombus burden, which are generally eligible for treatment with mechanical thrombectomy, represent approximately 60% of U.S. AMIs, or approximately 300,000 U.S. patients. We estimate there are approximately 8 million annual AMIs outside the U.S. that are eligible for mechanical thrombectomy.

•Clot associated with Arteriovenous Graft or Fistula: Arteriovenous grafts or fistulas are created for access to dialyze the blood of patients with end-stage renal disease. It is common for clots to form within these access vessels when patients undergo dialysis long-term.

Embolization and Access Markets

The embolization and access markets are comprised of various diseases and conditions throughout the body, such as aneurysm, hemorrhagic stroke, vessel malformations, bleeding, endoleaks, ovarian veins, varicoceles, and hematomas, as well as products that provide access to the diseased area. These conditions include:

•Aneurysm:An aneurysm is a weak area in a blood vessel that usually enlarges and is often described as a “ballooning” of the blood vessel. Approximately 2% of the general population has or will develop an aneurysm and approximately 9 million people in the United States may currently have an aneurysm. If a patient has had an aneurysm, there is a 20% likelihood that the patient will have one or more additional aneurysms. The primary endovascular procedure for treating unruptured aneurysms uses a repair technique called embolization, in which the aneurysm is packed with coils in a minimally invasive procedure.

•Hemorrhagic Stroke: Hemorrhagic strokes, caused by the sudden rupture of a brain artery that leads to bleeding into or around the brain, represent approximately 13% of strokes in the United States. Brain aneurysms and arteriovenous malformations (“AVM”) can both cause hemorrhagic stroke. According to independent sources, every year 0.5% to 3.0% of people with a brain aneurysm and 1.0% to 3.0% of people with an AVM may suffer from bleeding. According to the AHA and ASA, once a brain aneurysm or an AVM bleeds, the chance of death is 30% to 40% and 10% to 15%, respectively. Intracerebral hemorrhage, a type of hemorrhagic stroke, occurs when a vessel within the brain bursts, allowing blood to leak inside the brain.

Most endovascular procedures require access to the diseased area using guidewires and catheters. Accessing the brain through the tortuous neurovasculature has been a substantial challenge for physicians treating vascular disorders in the brain. Companies that developed catheters and other products for neurovascular applications historically leveraged technologies developed for use in coronary or peripheral vascular interventions. This approach created challenges given the vastly different anatomy, structure and sizing of the neurovascular vessels.

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Our Product Portfolio

Since our founding in 2004 we have developed a product portfolio that includes 6 product families within our major markets. The following table summarizes our product offerings.

Product Families Key Product Brands

THROMBECTOMY Peripheral Indigo SystemLightningFlashBoltCAT RX

Access NeuronNeuron MAXBENCHMARKBMXDDC PX SLIMMIDWAYAccess25

Neurosurgical Tools Artemis Neuro Evacuation Device

Thrombectomy Products

Our thrombectomy products fall into the following broad product families:

Peripheral Thrombectomy Products

Indigo System

The Indigo System is designed for continuous or modulated power aspiration of thrombus in the body, leveraging the success of the Penumbra System in ischemic stroke. Computer assisted vacuum thrombectomy leverages the power of continuous aspiration to augment the safety, speed and simplicity of thrombus removal, and is suited to a wide range of clot morphology in the peripheral arterial, peripheral venous, pulmonary arteries and coronary vasculature. The Indigo System is comprised of four principal components:

•Continuous Aspiration Mechanical Thrombectomy (CAT) Catheters are robust, durable, trackable and suited for the peripheral and coronary anatomy. We have introduced multiple sizes of catheters for use in both the peripheral and coronary vasculature. CAT Catheters are available in a wide range of sizes and lengths to address a wide range of vessel sizes and clot locations.

•Computer Assisted Vacuum Thrombectomy (CAVT) Technology combines our CAT Catheters with microprocessor-controlled software algorithms that orchestrate the interaction of our pump and catheters, enabling physicians to focus on optimizing thrombus removal while helping to mitigate blood loss for arterial and venous applications including the treatment of pulmonary embolism.

•Indigo Separators are advanced and retracted through the aspiration catheter at the proximal margin of the primary occlusion to facilitate clearing of the thrombus from the catheter tip. In the peripheral vasculature, clots often form

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in long segments and are more resistant to traditional aspiration techniques. The Indigo System with the Separator enables a practitioner to remove a wide range of clot morphology from both peripheral and coronary vasculature.

•Penumbra ENGINE or Penumbra Pump MAX is connected to our CAT catheters and CAVT technology, where applicable, and provides the needed aspiration suction force. We developed our proprietary aspiration source as a fully-integrated system specifically for mechanical thrombectomy by vacuum aspiration.

In 2023, we launched Lightning Flash, an advanced mechanical thrombectomy system to address venous and pulmonary thrombus using CAVT technology, and Lightning Bolt 7, an advanced arterial thrombectomy system that uses CAVT technology, including modulated aspiration, to address conditions such as ALI, hibernating thrombus and visceral occlusions. In 2024, we launched Lightning Flash 2.0, designed for increased efficiency and sensitivity to thrombus and blood flow, and in 2025 we launched Lightning Flash 3.0, our next generation technology featuring advanced Lightning Flash algorithms designed for enhanced clot detection capabilities with increased sensitivity to thrombus and blood and enlarged tubing coupled with an automated backflush feature tailored for large thrombus burdens and to reduce friction from aspirated thrombus. In addition, in 2025 we launched Lightning Bolt 12 and Lightning Bolt 6X with TraX, our latest CAVT technology involving modulated aspiration, designed to provide even faster clot removal and rapidly restore blood flow, as well as allow physicians to reach and address smaller vessels.

Neuro Thrombectomy Products

Our Penumbra System brand of products offers a form of mechanical thrombectomy used by specialist physicians to revascularize blood vessels that are blocked by clots in the intracranial vasculature. These products are aspiration-based. The Penumbra System is a fully integrated mechanical thrombectomy system consisting of reperfusion catheters and separators, the 3D Revascularization Device, aspiration tubing, and aspiration pump.

Penumbra System Reperfusion Catheters are the cornerstone of the Penumbra System and are manufactured using a variety of proprietary processes and materials science innovations for use in revascularization of patients with acute ischemic stroke.

The Penumbra System Reperfusion Catheters, powered by Penumbra ENGINE or Penumbra Pump MAX, are designed for trackability and to maximize thrombus removal force. We believe these design features contribute to improved clinical outcomes and reduced procedure times. Penumbra System Reperfusion Catheters include the Penumbra RED, JET, ACE, BMX, and MAX families of catheters, designed to address a broad range of occlusions.

In 2021, we launched our RED family of catheters, which are designed with the latest innovations in tracking and aspiration technology to navigate complex distal vessel anatomy and deliver powerful aspiration, together with Penumbra ENGINE, for the removal of blood clots in acute ischemic stroke patients with large vessel occlusions. In 2022, we initiated the THUNDER Study, which is an Investigational Device Exemption (“IDE”) study designed to evaluate the safety and effectiveness of CAVT technology for neurovascular applications and which completed enrollment in September 2024. In 2023, we added to the RED family by launching the RED 43 catheter and RED 72 catheter with SENDit Technology.

Designed specifically for use with aspiration technology, the 3D Revascularization Device is a component of the Penumbra System that offers a technologically-advanced structure designed to treat large vessel occlusion in combination with Penumbra RED, JET 7, ACE, and MAX Reperfusion Catheters.

EitherPenumbra ENGINE or Penumbra Pump MAXis connected to our reperfusion catheters and provides the aspiration suction force. We developed our proprietary aspiration source as a fully-integrated system specifically for mechanical thrombectomy by aspiration.

Embolization and Access Products

Peripheral Embolization Products

Ruby Embolization Platform

The Ruby Embolization Platform consists of detachable coils that are specifically designed for peripheral applications. Ruby Coils have a controlled mechanical detachment mechanism that permits the physician to deliver and reposition the coil until the final satisfactory position is reached before detachment.

The Ruby Embolization Platform is used in a variety of clinical applications, including, but not limited to:

•active extravasations, or the escape of blood into surrounding tissue;

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•selective embolization in patients with visceral aneurysms;

•exclusion of branches prior to chemoembolization and radioembolization;

•embolization in patients with gastrointestinal bleeding;

•embolization of branches prior to stent graft procedures;

•procedures after stent grafting in patients with persistent type II endoleaks and sac enlargement;

•treatment of patients with varicocele and pelvic congestion syndrome;

•high-flow arterial venous malformations;

•post trans intrahepatic shunt placement;

•balloon retrograde transvenous obliteration; and

•exclusion of hepatic branches prior to liver resection.

The Ruby LP Embolization Platform is used in a variety of clinical applications where smaller microcatheters are used to access smaller and more distal vessels within the peripheral vasculature. In 2025, we launched the Ruby XL Embolization Platform, our largest volume coil designed to achieve more efficient embolization, especially in large vessel and high-flow embolization.

LANTERN

The Penumbra LANTERN Delivery Microcatheter is a low-profile microcatheter with a high-flow lumen that enables large-volume coil delivery. LANTERN features a radiopaque distal shaft for enhanced visibility and dual distal marker bands for precise coil deployment in tortuous anatomy.

POD (Penumbra Occlusion Device) System

POD addresses a specific need in the peripheral embolization market to rapidly and precisely occlude a target vessel, including in high-flow situations. Our POD device utilizes technology that delivers both variable sizing and variable softness to provide a single device solution for rapid and precise embolization of the target vessel. The technology achieves this range of features through the design of a distal anchoring segment, thereby immediately anchoring the device in a range of vessel diameters. The proximal segment of the POD achieves dense occlusion by packing a softer, smaller diameter segment tightly behind the anchored portion.

The Packing Coil is a complementary device for use with our other peripheral embolization products. It is uniquely designed to pack densely behind Ruby Coils and POD to occlude arteries and veins throughout the peripheral vasculature including aneurysms. Both POD and Packing Coil are detached instantly with a sterile detachment handle.

Neuro Embolization Products

Penumbra Coil 400 is a family of detachable coils developed to offer an improved alternative for the treatment of small to large aneurysms and other larger, more complex lesions. We implemented several proprietary design innovations to enable the coil to maintain shape while achieving biomechanically stable occlusion. Given the size and handling of Penumbra Coil 400, it is able to achieve higher packing density with fewer coils compared to competitive coiling systems.

Penumbra SMART COIL is a family of detachable coils, designed to treat patients with a wide range of neurovascular lesions, including the small and medium sized aneurysms that comprise the majority of the neurovascular coiling market. The design of Penumbra SMART COIL allows the level of softness to be determined not only by the diameter of the platinum filament, but also by a structural component inside the coil itself. This development enables Penumbra SMART COIL to become progressively softer within the span of an individual coil.

Penumbra SwiftPAC Coil is a detachable coil, designed to treat patients with a wide range of neurovascular lesions. SwiftPAC Coil is engineered with a unique coil shape that enables dense coil packing in a vessel and comes in a range of lengths that can cover a variety of clinical scenarios. The length and volume of the coil are intended to reduce the total number of coils needed in a procedure.

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In 2025, we launched SwiftSET, a new complex coil solution engineered to optimize vessel wall apposition through its shape configuration and to facilitate smooth deployment and natural conformity to tight spaces for dense occlusion in small vessels. These attributes make it well-suited for a variety of neurovascular conditions, including intracranial aneurysms and other neurovascular abnormalities such as arteriovenous malformations and arteriovenous fistulae.

Access Products

The Neuron family of guide catheters and the Penumbra distal delivery catheters (“DDC”) enable many endovascular procedures in the tortuous anatomy of the neurovasculature. The Neuron delivery catheter is a variable stiffness guide catheter with increased support in the aortic arch, easier access, and trackability into the intracranial vasculature. The design of Neuron enables physicians to position the catheter much higher in the anatomy than conventional guide catheters.

The BENCHMARK catheter features additional improvements in aortic arch support, ease-of-use, and trackability. In addition to improved proximal support in the arch through multi-geometry metal reinforcement, the distal tip is softer and more trackable, while maintaining distal shaft radiopacity for improved visualization. The BENCHMARK also is available pre-packaged with a Select catheter to obviate the need for a neurovascular guide catheter exchange, which may reduce the number of devices needed per procedure and shorten procedure times.

The BENCHMARK family includes our BENCHMARK BMX Access System, which provides a larger internal diameter without increasing the outer diameter of the delivery catheter, enabling more working room for all neurovascular procedures while maintaining the same size access site as our Neuron MAX.

The MIDWAY intermediate catheter family, launched in 2024, consists of MIDWAY43 and MIDWAY62. Inspired by our RED catheter technology, MIDWAY intermediate catheters are designed to deliver a variety of microcatheters and embolization devices such as flow diverters, intrasaccular devices, stent systems, and delivery microcatheters for embolization cases, through our BENCHMARK and BMX guide catheters.

Neurosurgical Tools

Artemis Neuro Evacuation Device leverages our expertise in thrombectomy and access to offer a minimally invasive approach to surgical removal of fluid and tissue from the ventricles and cerebrum. The Artemis Neuro Evacuation Device works with a neuroendoscope through a sheath to access hematomas. Together with the Penumbra Pump MAX aspiration source, Artemis offers powerful and controlled hematoma evacuation.

Research and Development

Our research and development team has a track record of product innovation and significant product improvements. Since inception, we have introduced multiple brands in either the United States, international markets, or both.

We believe our ability to rapidly develop innovative products is in large part attributable to the fully integrated product innovation process that we have implemented, and the management philosophy behind that process. In addition, we have recruited and retained engineers with a variety of backgrounds and experience to support the development of innovative therapies. Substantially all of our research and development efforts are based at our campus in Alameda, California.

Manufacturing

We currently maintain our manufacturing facilities in Alameda and Roseville, California and currently produce substantially all of our products in-house. Our manufacturing facilities are International Organization for Standardization (“ISO”) 13485 compliant. We received ISO 13485:2016 certification of our Alameda facility in 2018 and successfully completed our most recent surveillance audit in 2025. We received ISO 13485:2016 certification of our Roseville facility in 2020 and successfully completed our most recent surveillance audit in 2025. In 2021, our Quality Management System was first audited to the European Union Medical Devices Regulation in support of product CE marking, and we successfully completed our most recent surveillance audit in 2025. We participate in the Medical Device Single Audit Program (“MDSAP”) which allows for certification and review of compliance to standards and regulations required in the United States, Canada, Brazil, Australia, and Japan by a single auditing organization. We received our first MDSAP certification in 2018 and successfully completed our most recent surveillance audit in 2025.

We use annual internal audits to ensure strong quality control practices. An internal, on-going staff training and education program contributes to our quality assurance program; training is documented and considered part of the employee evaluation process.

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We believe we have adequate supplies or sources of availability of raw materials necessary to meet our needs. However, there are risks and uncertainties with respect to the supply of raw materials, particularly where provided by a single supplier, which could impact availability in sufficient quantities to meet our needs. In an effort to manage risk associated with raw materials supply, we work closely with suppliers to help ensure availability and continuity of supply while maintaining high quality and reliability. We also utilize long-term supply contracts with some suppliers to help maintain continuity of supply and manage the risk of price increases. Where possible, we seek second-source suppliers or suppliers that have alternate manufacturing sites at which they could manufacture our parts.

Sales and Marketing

We sell our products directly in the United States, most of Europe, Canada, Australia and Singapore, subject to required regulatory clearances and approvals. We have complemented our direct sales organization with distributors in most international markets.

We currently sell our products in the United States through our dedicated salesforce. Our sales representatives and sales managers generally have substantial medical device experience and market our products directly to a variety of specialist physicians engaged in the treatment of vascular disorders, who are the end users of our products and significantly influence buying decisions in hospitals and other healthcare settings relating to medical devices. We are focused on developing strong relationships with specialist physicians and other healthcare providers and devote significant resources to training and educating physicians and other healthcare providers in the use and benefits of our products. The principal specialist physicians and other healthcare providers in our target end markets include:

•Thrombectomy:Interventional radiologists, interventional neuroradiologists, vascular surgeons, neurosurgeons, interventional cardiologists and interventional neurologists.

•Embolization and Access: Neurosurgeons, interventional neuroradiologists, interventional neurologists, interventional radiologists, vascular surgeons and pediatric interventional cardiologists.

In addition to our direct sales organizations, we work with distributors in certain geographic areas where we have determined that selling through distributors is likely to be more effective.

We license the technology to certain of our products to our existing distribution partner in China pursuant to a series of licensing arrangements entered into in December 2020, February 2022, September 2023 and March 2024, which permit our partner to manufacture and commercialize such products in China in exchange for fixed payments upon the transfer of the distinct licensed technology and upon the provision of related regulatory support, as well as, in certain cases, royalty payments on downstream sales of the licensed products. We believe these arrangements will allow us to monetize our technology while helping us to mitigate market risk.

Our direct sales have been, and we anticipate will continue to represent, a majority of our revenues. In 2025, direct sales accounted for approximately 90% of our revenue, with the balance generated by independent distributors that sell our products outside of the United States and by the arrangements with our partner in China, which include licensing royalty and distribution revenue.

Backlog

We typically accept and ship orders on the day purchase orders are received or the next business day. Furthermore, if requested, we generally permit customers to cancel or reschedule without penalty. As a result, we do not believe that our backlog at any particular time is material, nor is it a reliable indication of future revenue.

Reimbursement

In the United States, hospitals are the primary purchasers of our products. Hospitals in turn bill various third-party payors, such as Medicare, Medicaid and private health insurance plans, for the total healthcare services required to treat the patient. Government agencies and some other payors determine whether to provide coverage for a particular procedure and to reimburse hospitals for inpatient treatment at a fixed rate based on the Medicare severity diagnosis-related group (“MS-DRG”) as determined by the U.S. Centers for Medicare and Medicaid Services (“CMS”). The fixed rate of reimbursement is generally based on the patients’ diagnosis and the procedure performed, and is unrelated to the specific medical device used in that procedure. Medicare rates for the same or similar procedures vary due to geographic location, nature of facility in which the procedure is performed (i.e., teaching or community hospital) and other factors. Private payors vary in their coverage and payment policies. While some may look to coverage and payment by Medicare as a guide, most formulate their own coverage and payment policies.

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Some payors may deny reimbursement if they determine that the device used in a treatment was unnecessary, not cost-effective, or used for a non-approved indication. We cannot assure you that government or private third-party payors will cover and reimburse the procedures performed using our products in whole or in part in the future, that payment rates will be adequate, or that reimbursement rates will not change in the future.

Outside the United States, market acceptance of medical devices depends partly upon the availability of reimbursement within the prevailing healthcare payment system. Reimbursement levels vary significantly by country, and by region within some countries. Reimbursement is obtained from a variety of sources, including government-sponsored and private health insurance plans, and combinations of both. A small number of countries may require us to gather additional clinical data before or after recognizing coverage and reimbursement for our products. It is our intent to complete the requisite clinical studies and obtain coverage and reimbursement approval in countries where it makes economic sense to do so.

The increased emphasis on managed healthcare in the United States and on country and regional pricing and reimbursement controls in international markets will put additional pressure on product pricing, reimbursement and usage, which may adversely affect our product sales and results of operations. These pressures can arise from rules and practices of insurers and managed care organizations, judicial decisions and governmental laws and regulations related to Medicare, Medicaid and healthcare reform, medical device reimbursement policies and pricing in general. Our ability to achieve market acceptance or significant sales volume will depend in large part on the availability of coverage and the level of reimbursement for procedures performed using our products under healthcare payment systems in such markets.

All third-party reimbursement programs, whether government funded or insured commercially, whether in the United States or internationally, are developing increasingly sophisticated methods of controlling health care costs through prospective reimbursement and capitation programs, group purchasing, redesign of benefits, second opinions required prior to major surgery, review and analysis of claims, encouragement of and incentives for maintaining healthier lifestyles, and exploration of more cost-effective methods of delivering health care. These types of programs and legislative or regulatory changes to reimbursement policies could potentially limit the amount which healthcare providers may be willing to pay for medical devices.

Competition

The medical device industry is intensely competitive, subject to rapid change and significantly affected by new product introductions and other market activities of industry participants. We compete with a number of manufacturers and distributors of neuro and vascular medical devices. Our most notable competitors are Boston Scientific, Medtronic, Stryker (now including Inari Medical), Terumo and several private companies. Most of these competitors are large, well-capitalized companies with longer operating histories and greater resources than we have. As a consequence, they are able to spend more on product acquisition, development, marketing, sales and other product initiatives than we can. We also compete with a number of smaller medical device companies that have single products or a limited range of products. Some of our competitors have:

•significantly greater name recognition;

•broader or deeper relations with healthcare professionals, customers, group purchasing organizations, and third-party payors;

•more established distribution networks;

•additional lines of products and the ability to offer rebates or bundle products to offer greater discounts or other incentives to gain a competitive advantage;

•greater experience in conducting research and development, manufacturing, clinical trials, marketing and obtaining regulatory clearance or approval for products; and

•greater financial and human resources for product development, sales and marketing and patent litigation.

We compete primarily on the basis that our products are able to treat patients with neuro and vascular diseases and disorders and other health conditions safely and effectively. Our continued success depends on our ability to:

•develop innovative, proprietary products that can cost-effectively address significant clinical needs;

•continue to innovate and develop scientifically advanced technology;

•obtain and maintain regulatory clearances or approvals;

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•demonstrate safety and efficacy in Penumbra-sponsored and third-party clinical trials and studies;

•apply technology across product lines and markets;

•attract and retain skilled research and development and sales personnel; and

•cost-effectively manufacture and successfully market and sell products.

Intellectual Property

Our success depends in part on our ability to protect our proprietary technology and intellectual property and operate without infringing the patents and other proprietary rights of third parties. We rely on a combination of patent, trademark, trade secret, copyright and other intellectual property rights and measures to protect our intellectual property rights that we consider important to our business. We also rely on know-how and continuing technological innovation to develop and maintain our competitive position. We do not have any material licenses to any technology or intellectual property rights.

As of December 31, 2025, we owned and/or had rights to 125 issued patents globally, of which 66 were U.S. patents. As of December 31, 2025, we owned and/or had rights to 49 pending patent applications, of which 21 were patent applications pending in the United States. Thirty-seven of our issued patents, which relate to components of the Penumbra Coil 400, Ruby Embolization Platform and Smart Coil System, are currently expected to expire between 2029 and 2037. Sixteen patents pertaining to the 3D Revascularization Device are projected to expire between 2032 and 2034. Twenty-two patents relating to our computer assisted vacuum thrombectomy (CAVT) technology are projected to expire between 2039 and 2044. Some of our pending patent applications pertain to components and methods of use associated with currently commercialized products. Our pending patent applications may not result in issued patents and we can give no assurance that any patents that have issued or might issue in the future will protect our current or future products or provide us with any competitive advantage. See the section titled “Risk Factors-Risks Related to Our Intellectual Property” in this Form 10-K for additional information.

Additionally, we own or have rights to trademarks or trade names that are used in our business and in conjunction with the sale of our products, including 46 U.S. trademark registrations and 235 foreign trademark registrations as of December 31, 2025. Included in the registered trademarks is a mark with our company name and logo.

We also seek to protect our proprietary rights through a variety of other methods, including confidentiality agreements and proprietary information agreements with suppliers, employees, consultants and others who may have access to our proprietary information.

Government Regulation

Our products are subject to extensive and ongoing regulation by the United States Food and Drug Administration (“FDA”) under the Federal Food, Drug, and Cosmetic Act (the “FD&C Act”) and its implementing regulations, as well as other federal and state regulatory bodies in the United States and comparable authorities in other countries under other statutes and regulations. The laws and regulations govern, among other things, product design and development, pre-clinical and clinical testing, manufacturing, packaging, labeling, storage, record keeping and reporting, handling of patient data and information, clearance or approval, marketing, distribution, promotion, import and export, pricing and discounts, post-marketing surveillance and interactions with healthcare professionals. Failure to comply with applicable requirements may subject a device and/or its manufacturer to a variety of administrative sanctions, such as issuance of warning letters, import detentions, civil monetary penalties, and/or judicial sanctions, such as product seizures, injunctions and criminal prosecution.

United States

FDA’s Premarket Clearance and Approval Requirements

Prior to commercially distributing medical devices in the United States, either a prior premarket notification (or 510(k)) clearance, unless it is exempt, or a premarket approval (“PMA”) from FDA is required. Medical devices are classified into three classes—Class I, Class II or Class III—depending on the degree of risk associated with each medical device and the extent of control needed to provide reasonable assurance of safety and effectiveness. Class I devices are deemed to be low risk and are subject to the general controls of the FD&C Act, such as provisions that relate to adulteration; misbranding; registration and listing; notification, including repair, replacement, or refund; records and reports; and good manufacturing practices. Most Class I devices and some Class II devices are exempt from premarket notification under Section 510(k) of the FD&C Act and therefore may be commercially distributed without obtaining 510(k) clearance from FDA. Class II devices are subject to both general controls and special controls to provide reasonable assurance of safety and effectiveness. Special controls include performance standards, postmarket surveillance, patient registries, and guidance documents. A manufacturer may be required to

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submit to FDA a premarket notification requesting clearance to commercially distribute some Class II devices. Medical devices which pose the greatest risk, such as life-sustaining or life-supporting devices, or devices deemed not substantially equivalent to a previously cleared 510(k) device, are Class III devices. For most Class III devices, a PMA application will be required, subject to certain limited exceptions. FDA can also impose sales, marketing or other restrictions on devices to assure they are used in a safe and effective manner.

510(k) Clearance Pathway

When a 510(k) clearance is required, a premarket notification must be submitted to FDA demonstrating that the proposed device is substantially equivalent to a predicate device, which is a previously cleared and legally marketed 510(k) device or a device that was in commercial distribution before May 28, 1976. By regulation, a premarket notification must be submitted and receive 510(k) clearance from FDA before the device can be marketed in the United States. The Medical Device User Fee Amendments (“MDUFA”) performance goal for a traditional 510(k) clearance is 90 calendar days. As a practical matter, however, clearance often takes longer, because the review clock can be paused by FDA to allow time to resolve questions on the 510(k) file. To demonstrate substantial equivalence, the manufacturer must show that the proposed device has the same intended use as the predicate device, and it either has the same technological characteristics, or different technological characteristics and the information in the premarket notification demonstrates that the device does not raise new questions of safety and effectiveness. FDA may require further information, including clinical data, to make a determination of substantial equivalence. If FDA determines the device, or its intended use, is not substantially equivalent to a previously cleared device, the applicant may resubmit another 510(k) with new data, submit a De Novo Classification request, file a reclassification petition, or submit a PMA application for the device.

There are three types of 510(k)s: traditional, special and abbreviated. Special 510(k)s are appropriate for certain technological, design, and labeling changes to a device which necessitates a new 510(k) but where the method(s) to evaluate the change(s) are well-established, and whether the results can be sufficiently reviewed in a summary or risk analysis format. Abbreviated 510(k)s are for devices that conform to a recognized standard. The special and abbreviated 510(k)s are intended to streamline review, and FDA intends to process special 510(k)s within 30 days of receipt.

Premarket Approval Pathway

A PMA application under section 515 of the FD&C Act must be submitted to FDA for Class III devices that support or sustain human life, are of substantial importance in preventing impairment of human health, or which present a potential, unreasonable risk of illness or injury. The PMA application process is much longer and more involved than the 510(k) premarket notification process. A PMA is based on a determination by FDA that the PMA application contains sufficient valid scientific evidence to assure that the device is safe and effective for its intended use(s).

By law, FDA has 180 days to review a PMA application once it has been accepted for filing, although the review of an application generally occurs over a significantly longer period of time and can take up to several years. Also, an advisory panel of experts from outside FDA may be convened to review and evaluate the application and provide recommendations to the FDA as to the approvability of the device. Although FDA is not bound by the advisory panel decision, the panel’s recommendations are important to FDA’s overall decision making process. In addition, FDA may conduct a preapproval inspection of the manufacturing facility to ensure compliance with the Quality Management System Regulation (“QMSR”). FDA also may inspect one or more clinical sites to assure compliance with FDA’s regulations.

Upon completion of the PMA application review, FDA may: (i) approve the PMA which authorizes commercial marketing with specific prescribing information for one or more indications, which can be more limited than those originally sought; (ii) issue an approvable letter which indicates FDA’s belief that the PMA application is approvable and states what additional information FDA requires, or the post-approval commitments that must be agreed to prior to approval; (iii) issue a not approvable letter which outlines steps required for approval, but which are typically more onerous than those in an approvable letter, and may require additional clinical trials that are often expensive and time consuming and can delay approval for months or even years; or (iv) deny the PMA application. If FDA issues an approvable or not approvable letter, the applicant has 180 days to respond, after which FDA’s review clock is reset.

Clinical Trials

Clinical trials are almost always required to support a PMA and are less often required for 510(k) clearance. In the United States, for significant risk devices, these trials require submission of an application for an IDE to FDA. The IDE application must be supported by appropriate data, such as animal and laboratory testing results, showing it is safe to test the device in humans and that the testing protocol is scientifically sound. The IDE must be approved in advance by FDA for a specific number of patients at specified study sites. During the trial, the sponsor must comply with FDA’s IDE requirements for investigator selection, trial monitoring, reporting, and recordkeeping. The investigators must obtain patient informed consent, rigorously follow the investigational plan and study protocol, control the disposition of investigational devices, and comply

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with all reporting and recordkeeping requirements. Clinical trials for significant risk devices may not begin until the IDE application is approved by FDA and the appropriate institutional review boards (“IRBs”), at the clinical trial sites. An IRB is an appropriately constituted group that has been formally designated to review and monitor medical research involving subjects and which has the authority to approve, require modifications in, or disapprove research to protect the rights, safety and welfare of human research subjects. A nonsignificant risk device does not require FDA approval of an IDE; however, the clinical trial must still be conducted in compliance with various requirements of FDA’s IDE regulations and be approved by an IRB at the clinical trials sites. The sponsor, FDA or the IRB at each site at which a clinical trial is being performed may withdraw approval of a clinical trial at any time for various reasons, including a belief that the risks to study subjects outweigh the benefits or a failure to comply with FDA or IRB requirements. Even if a trial is completed, the results of clinical testing may not demonstrate the safety and effectiveness of the device, may be equivocal or may otherwise not be sufficient to obtain approval or clearance of the product.

Sponsors of clinical trials of devices are required to register with clinicaltrials.gov, a public database of clinical trial information. Information related to the device, patient population, phase of investigation, study sites and investigators, and other aspects of the clinical trial is made public as part of the registration.

Ongoing Regulation by FDA

Along with the requirement for device clearance or approval by FDA, there are additional obligations and regulations that must be followed. These include:

•establishment registration and device listing;

•QMSR, which became effective on February 2, 2026 and amended the requirements of the Quality System Regulation under 21 CFR Part 820 of U.S. Code of Federal Regulations, and which requires manufacturers, including third-party manufacturers, to follow design, testing, control, documentation, and other quality assurance procedures during all aspects of the manufacturing process;

•labeling regulations and prohibitions against product adulteration and misbranding (e.g., the promotion of products that do not have the appropriate market clearance or promotion for “off-label” uses), and other requirements related to promotional activities;

•medical device reporting regulations, which require that manufacturers report to FDA if their device may have caused or contributed to a death or serious injury or if their device malfunctioned and the device or a similar device marketed by the manufacturer would be likely to cause or contribute to a death or serious injury if the malfunction were to recur;

•corrections and removal reporting regulations, which require that manufacturers report to FDA field corrections or removals if undertaken to reduce a risk to health posed by a device or to remedy a violation of the FD&C Act that may present a risk to health; and

•post-market surveillance regulations, which apply to certain Class II or Class III devices when necessary to protect the public health or to provide additional safety and effectiveness data for the device.

After a device receives 510(k) clearance, any modification that could significantly affect its safety or effectiveness, or that would constitute a major change in its intended use, may require a new 510(k). FDA requires each manufacturer to make this determination initially, but the FDA can review any such decision and may disagree with a manufacturer’s determination. If FDA disagrees with the determination to not seek a new 510(k) clearance, FDA may retroactively require a 510(k) clearance or potentially require another pathway, such as a PMA. FDA could also require the manufacturer to cease marketing and distribution and/or recall the modified device until 510(k) clearance is obtained. Also, in these circumstances, there may be significant regulatory fines and penalties.

Changes to an approved PMA device, including changes in indications, labeling, or manufacturing processes or facilities, require submission and FDA approval of a new PMA application or PMA supplement, as appropriate, before the change can be implemented. Supplements to a PMA often require the submission of the same type of information required for an original PMA application, with the exception that the supplement is generally limited to the information needed to support the proposed change from the device covered by the original PMA.

FDA regulations require the registration of manufacturing facilities for medical device manufacturers. Additionally, the California Department of Health Services (“CDHS”) requires registration as a medical device manufacturer within the state. Therefore, FDA and the CDHS may inspect the registered facilities on a routine basis for compliance with the QMSR. These

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regulations include requirements for the manufacturing of products and maintaining of related documentation with respect to manufacturing, testing, maintenance and control activities. Manufacturers are subject to regular QMSR inspections in connection with the manufacture of medical devices at registered facilities. Further, FDA requires compliance with various labeling regulations. Failure by manufacturers or by their suppliers to comply with applicable regulatory requirements can result in enforcement action by FDA or state authorities, which may include any of the following sanctions:

•warning or untitled letters, fines, injunctions, consent decrees and civil penalties;

•customer notifications, voluntary or mandatory recall or seizure of our products;

•operating restrictions, partial suspension or total shutdown of production;

•delay in processing submissions or applications for new products or modifications to existing products;

•withdrawing approvals that have already been granted; and

•criminal prosecution.

The Medical Device Reporting laws and regulations require us to provide information to FDA when we receive or otherwise become aware of information that reasonably suggests our device may have caused or contributed to a death or serious injury as well as a device malfunction that likely would cause or contribute to death or serious injury if the malfunction were to recur. In addition, FDA prohibits an approved device from being marketed for off-label use. FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to significant liability, including substantial monetary penalties and criminal prosecution.

Newly discovered or developed safety or effectiveness data may require changes to a product’s labeling, including addition of new warnings and contraindications, and also may require the implementation of other risk management measures. Also, new government requirements, including those resulting from new legislation, may be established, or FDA’s policies may change, which could delay or prevent regulatory clearance or approval of our products under development.

We are also subject to other federal, state and local laws, and regulations relating to safe working conditions, laboratory, and manufacturing practices.

Regulatory Inspections

We are subject to periodic inspections by FDA related to the regulatory requirements that apply to medical devices designed and manufactured, and clinical trials sponsored, by us. When FDA conducts an inspection, the inspectors will identify any deficiencies in the form of a notice of inspectional observations, or FDA Form 483. If a notice of inspectional observations or deficiencies is received from FDA following an inspection, we would be required to respond in writing, and would be required to undertake corrective and/or preventive or other actions in order to address FDA’s concerns. Failure to address FDA’s concerns may result in the issuance of a warning letter or other enforcement or administrative actions.

European Union

Our medical devices are regulated in the European Union as medical devices per the European Union Medical Devices Regulation 2017/745, as amended (“EU MDR”). An authorized third party, also called a Notified Body, must approve products for CE marking, other than those which are categorized as class I self-certified. The CE mark is contingent upon continued compliance to the applicable regulations, harmonized standards and the quality system requirements of the EU MDR and the ISO 13485 standard.

Our medical devices were previously regulated per the European Union Directive (93/42/EEC), also known as the Medical Device Directive (the “MDD”). In May 2017, the EU MDR was published to replace the MDD and came into effect on May 26, 2021. We have updated our quality management system processes to meet the EU MDR requirements, which were successfully audited most recently in October 2025 by our Notified Body. We have also submitted technical documentation supporting all of the device families we intend to CE Mark under EU MDR to our Notified body and obtained CE Mark approvals for all of our product families, allowing us to continue to supply our products to the markets in the region covered by EU MDR.

Other Regions

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Most major markets have different levels of regulatory requirements for medical devices. Modifications to the cleared or approved products may require a new regulatory submission in all major markets. The regulatory requirements, and the review time, vary significantly from country to country.

Fraud and Abuse and Other Healthcare Regulation

Anti-Kickback Statute

We are subject to various federal and state healthcare laws, including, but not limited to, anti-kickback laws. In particular, the federal Anti-Kickback Statute prohibits persons or entities from knowingly and willfully soliciting, offering, receiving or paying any remuneration, directly or indirectly, overtly or covertly, in cash or in kind, in exchange for or to induce either the referral of an individual for the furnishing or arranging for a good or service, or for the purchasing, leasing, ordering, or arranging for or recommending any good, facility, service or item for which payment may be made in whole or in part under federal healthcare programs, such as the Medicare and Medicaid programs. The federal Anti-Kickback Statute is broad and prohibits many arrangements and practices that are lawful in businesses outside of the healthcare industry. The term “remuneration” expressly includes kickbacks, bribes, or rebates and also has been broadly interpreted to include anything of value, including, for example, gifts, discounts, the furnishing of supplies or equipment, credit arrangements, payments of cash, waivers of payments, ownership interests and providing anything at less than its fair market value.

There are a number of statutory exceptions and regulatory safe harbors protecting certain business arrangements from prosecution under the federal Anti-Kickback Statute. These statutory exceptions and safe harbors set forth provisions that, if all their applicable requirements are met, will assure healthcare providers and other parties that they may not be prosecuted under the federal Anti-Kickback Statute. The failure of a transaction or arrangement to fit precisely within one or more applicable statutory exceptions or safe harbors does not necessarily mean that it is illegal or that prosecution will be pursued. However, conduct and business arrangements that do not fully satisfy all requirements of an applicable safe harbor may result in increased scrutiny by government enforcement authorities and will be evaluated on a case-by-case basis based on a cumulative review of all of its facts and circumstances. Additionally, the intent standard under the federal Anti-Kickback Statute was amended under the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010 (“Affordable Care Act”), to a stricter standard such that a person or entity no longer needs to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation. The Affordable Care Act provides that the government may assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the federal civil False Claims Act which is discussed below. Penalties for violations of the anti-kickback statute include, but are not limited to, criminal, civil and/or administrative penalties, damages, fines, disgorgement, individual imprisonment, possible exclusion from Medicare, Medicaid and other federal healthcare programs, and the curtailment or restructuring of operations. Various states have adopted laws similar to the federal Anti-Kickback Statute, and some of these state laws may be broader in scope in that some of these state laws extend to all payors and may not contain safe harbors. In addition, many foreign jurisdictions in which we operate have similar laws and regulations.

Federal Civil False Claims Act. The federal civil False Claims Act prohibits, among other things, persons or entities from knowingly presenting or causing to be presented a false or fraudulent claim to, or the knowing use of false statements to obtain payment from or approval by, the federal government. Suits filed under the federal civil False Claims Act, known as “qui tam” actions, can be brought by any individual on behalf of the government. These individuals, sometimes known as “relators” or, more commonly, as “whistleblowers,” may share in any amounts paid by the entity to the government in fines or settlement. As a result, qui tam actions continue to cause healthcare companies to have to defend cases brought under the federal civil False Claims Act. If an entity is determined to have violated the federal civil False Claims Act, it may be required to pay up to three times the actual damages sustained by the government, plus civil penalties for each separate false claim. Various states have adopted laws similar to the federal civil False Claims Act, and many of these state laws are broader in scope and apply to all payors, and therefore, are not limited to only those claims submitted to the federal government.

Federal Civil Monetary Penalties Statute. The federal Civil Monetary Penalties Statute, among other things, imposes fines against any person who is determined to have presented, or caused to be presented, claims to a federal healthcare program that the person knows, or should know, is for an item or service that was not provided as claimed or is false or fraudulent.

Sunshine Act. The Affordable Care Act also included a provision, commonly referred to as the Sunshine Act, that requires any manufacturer of a covered device that provides payments or other transfers of value to a physician or teaching hospital, or to a third party at the request of a physician or teaching hospital, to submit to CMS on an annual basis information about the payments or other transfers of value, with the reported information to be made public on a searchable website. This reporting requirement was expanded by the SUPPORT for Patients and Communities Act, which required manufacturers, beginning January 1, 2021, to report payments or other transfers of value to physician assistants, nurse practitioners, clinical nurse

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specialists, certified registered nurse anesthetists, and certified nurse midwives in addition to physicians and teaching hospitals. Similar laws have been enacted at the state level and in foreign jurisdictions, including France.

Foreign Corrupt Practices Act and Anti-Bribery Laws. The Foreign Corrupt Practices Act (“FCPA”) prohibits U.S. companies and their representatives from offering or making payments to foreign officials for the purpose of securing a business advantage. In many countries, the healthcare professionals we regularly interact with may meet the definition of a foreign government official for purposes of the FCPA. Similar anti-bribery laws are in effect in many of the countries in which we operate.

Health Insurance Portability and Accountability Act of 1996. The federal Health Insurance Portability and Accountability Act of 1996, as amended (“HIPAA”) created several new federal crimes, including healthcare fraud and false statements relating to healthcare matters. The healthcare fraud statute prohibits knowingly and willfully executing a scheme to defraud any healthcare benefit program, including private third-party payors. The false statements statute prohibits knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for healthcare benefits, items or services. In addition, HIPAA and its implementing regulations established uniform standards for certain covered entities, which are healthcare providers, health plans and healthcare clearinghouses, as well as their business associates, governing the conduct of specified electronic healthcare transactions and protecting the security and privacy of protected health information.

The American Recovery and Reinvestment Act of 2009, commonly referred to as the economic stimulus package, included an expansion of HIPAA’s privacy and security standards called the Health Information Technology for Economic and Clinical Health Act (“HITECH”). Among other things, HITECH created four tiers of civil monetary penalties and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorneys’ fees and costs associated with pursuing federal civil actions.

Human Capital Resources

As of December 31, 2025, we had approximately 4,700 employees worldwide. None of our U.S. employees are represented by a collective bargaining agreement. Some of our employees outside of the United States are subject to mandatory, industry-specific collective bargaining agreements or the protections of statutory works councils as required by local law. We have never experienced a work stoppage. We believe our employee relations are good.

In managing our business, we focus on a number of measures and objectives with respect to the attraction, development and retention of our employees that we believe are important to our business, including communication, compensation, professional development, inclusion, health, well-being and safety:

•We are proud to be an equal opportunity employer and remain committed to hiring the most qualified employees. These goals have produced a motivated, high-performing and inclusive employee population and leadership team: for example, as of December 31, 2025, more than 45% of our employees are female, approximately half of our senior management team are female, and more than 70% of our employee population in the United States are from a minority background. We believe that our employee population enhances employee engagement and stimulates innovation, and that people with different perspectives work better, share information more broadly and consider a wider range of views. We pride ourselves on our engaged workforce, which we believe has been and will continue to be a major contributor to our growth and innovation.

•We aim to maintain an “open door” culture, and encourage employees to voice their concerns, questions, suggestions and comments. We strive to foster an atmosphere where employees openly share ideas and where people are treated with dignity and respect. Our goal is to provide a productive working environment based on mutual respect and the highest level of ethical and lawful conduct. We have also established a hotline for employees to report suspected violations of law and concerns related to accounting, auditing and ethical violations.

•We provide our employees a competitive wage that is aimed to allow them to meet the standard cost of living in their region. We evaluate our compensation programs to ensure that our employees are paid fairly for the valuable work they are doing, and we are rewarding outstanding performance. We are also committed to achieving internal pay equity. We offer our employees competitive benefits that follow local country standards.

•We aim to foster a culture where learning is continuous, and we strive to promote from within. We believe in our people and their ability to accept new responsibilities and challenges and to grow with us to contribute to our success. Growth is fostered through professional development and learning programs as well as practical experience leading projects or teams. Employees receive regular performance reviews to support their progress and development.

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•We recognize the benefits of a healthy workforce. We provide employees at our Alameda and Roseville campuses with fresh food options at discounted pricing for employees, and we maintain on-site fitness centers for employees at our Alameda and Roseville campuses. Employees in the United States are also eligible for a gym discount at a local commercial fitness chain. We also support the mental health of our employees by offering an employee assistance program for employees and their families that provides free counseling sessions and offers other resources for employees.

•We prioritize the health and safety of our employees. Guided by a strategic plan that is regularly reviewed, we have a dedicated Employee Health and Safety team, who seek to prevent and reduce workplace risks and injuries through various programs, projects, services, and assistance, such as ergonomic evaluation, hazard reporting, risk assessment, and first aid training. Employee safety is also supported by an access control system at all facilities and a dedicated 24/7 Security team on the Alameda and Roseville campuses. We require all work-related injuries or illnesses to be reported. This information is reviewed monthly by our Safety Committee for analysis and trending.

Facilities

We maintain approximately 610,000 square feet of office, research and development, manufacturing and administrative facilities in nine buildings at our campus in Alameda, California as of December 31, 2025. The leases for these nine buildings expire at various times in 2036, subject to our option to renew certain leases for an additional five to fifteen years. We also lease approximately 260,000 square feet of office and manufacturing facilities in two buildings in Roseville, California. The leases for these two buildings expire in 2035, subject to our option to renew the leases for an additional five to ten years. In addition, we lease approximately 51,000 square feet of warehouse space in Livermore, California, and approximately 100,000 square feet of warehouse space in Salt Lake City, Utah. The leases for the Livermore warehouse spaces expire in 2028. The lease for the Salt Lake City warehouse expires in 2027, subject to our option to renew the lease for an additional five years.

We also lease office and/or warehouse space in Germany, Italy, Poland, Brazil, Australia, Singapore, Japan, Hong Kong and Taiwan as of December 31, 2025. The offices in Germany and Poland support our direct sales and/or customer service operations in Europe as well as distributor relationships in Europe, the Middle East and Africa; the offices in Brazil, Australia, Singapore, Japan, Hong Kong and Taiwan support our sales and marketing efforts, including through our distribution partners, in Latin America, Australia and Southeast Asia, respectively; and the offices in Italy support the operations of Crossmed S.p.A., our wholly-owned subsidiary in Italy, including supporting our direct sales operations in Italy, San Marino, Vatican City, and Switzerland. We also warehouse and distribute finished products to our international customers utilizing third-party logistics providers in the Netherlands and Australia.

During the year ended December 31, 2025, we entered into agreements to acquire property in Costa Rica and construct a manufacturing facility and warehouse for the production of medical devices. Refer to Note “5. Balance Sheet Components” to our consolidated financial statements in Part II, Item 8 of this Form 10-K for more information. In addition, during the year ended December 31, 2025, we entered into an agreement to lease approximately 46,000 square feet of manufacturing and warehouse facilities in Costa Rica. The lease will commence upon the completion of certain improvements to the premises, which are expected to be completed in 2026, and will expire five years after commencement, subject to our option to renew the lease for an additional three years.

Legal Proceedings

From time to time, we are subject to claims and assessments in the ordinary course of business. For more information regarding our current legal proceedings, please refer to the section entitled “Legal Proceedings” in Part I, Item 3 of this Form 10-K. Such matters are subject to many uncertainties and there can be no assurance that legal proceedings arising in the ordinary course of business or otherwise will not have a material adverse effect on our business, financial condition, results of operations or cash flows.

Available Information

We make our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports available free of charge at our website as soon as reasonably practicable after they have been filed with the SEC. Our website address is www.penumbrainc.com. Information contained in or accessible through our website is not part of this report. The SEC maintains a website that contains the materials we file with the SEC at www.sec.gov.

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ITEM 1A. RISK FACTORS.

This Form 10-K contains forward-looking information based on our current expectations. Because our business is subject to many risks and our actual results may differ materially from any forward-looking statements made by or on behalf of us, this section includes a discussion of important factors that could affect our business, operating results, financial condition and the trading price of our common stock. You should carefully consider these risk factors, together with all of the other information included in this Form 10-K as well as our other publicly available filings with the SEC. If any of the following risks actually occurs, our business, financial condition, results of operations and future prospects could be materially and adversely harmed.

Risk Related to Our Proposed Merger

Uncertainty associated with our agreement to be acquired by Boston Scientific Corporation could have an adverse effect on our business.

On January 14, 2026, we entered into the Merger Agreement with Boston Scientific Corporation and Merger Sub, pursuant to which Boston Scientific Corporation has agreed to acquire us for $374 per share pursuant to the Merger, with our stockholders having the right to elect, for each share of our common stock held by them, to receive $374 in cash or 3.8721 shares of Boston Scientific Corporation’s common stock (valued at $374 based on the volume weighted average price of Boston Scientific Corporation’s common stock over the 10 trading days ending January 13, 2026), subject to proration, so that the total transaction consideration is paid approximately 73% in cash and approximately 27% in shares of Boston Scientific Corporation’s common stock. Uncertainty about the effect of the Merger Agreement and the Merger on our customers, employees, suppliers, vendors, and business partners may have an adverse effect on our business and operations that may be material to our company. For example, our employees may experience uncertainty about their roles following the Merger. There can be no assurance we will be able to attract and retain key talent, including senior leaders, engineers, salespeople, and others to the same extent that we have previously been able to attract and retain employees. Any loss or distraction of such employees could have a material adverse effect on our business and operations. In addition, we have diverted, and will continue to divert, significant management attention and resources towards the completion of the Merger, which could materially adversely affect our business and results of operations.

Moreover, our customers may experience uncertainty associated with the Merger, including with respect to possible changes to our products, technology or policies. Similarly, our suppliers, vendors, business partners and distribution channels may experience uncertainty associated with the Merger, including with respect to current or future business relationships with us. Uncertainty may cause customers to refrain from purchasing our products and to instead purchase our competitors’ products, and suppliers, vendors and business partners may seek to change existing business relationships, which could result in an adverse effect on our business, results of operations and financial condition in a way that may be material to our company.

Pursuant to the terms of the Merger Agreement, until the Merger becomes effective or the Merger Agreement is terminated, we are subject to certain restrictions on the conduct of our business, including in certain cases restrictions on our ability to enter into certain material contracts, acquire or dispose of assets outside of the ordinary course of business, incur indebtedness or make unbudgeted capital expenditures. These restrictions may prevent us from taking actions with respect to our business that we may consider advantageous, and result in our inability to respond effectively to competitive pressures and industry developments and may otherwise harm our business and results of operations.

The failure to complete the Merger could adversely affect our business.

Completion of the Merger is subject to conditions beyond our control that may prevent, delay or otherwise adversely affect its completion in a material way, including the approval of our stockholders and the expiration or termination of applicable waiting periods and the receipt of certain clearances under antitrust and competition laws. If the Merger or a similar transaction is not completed, the share price of our common stock may decline to the extent that the current market price of our common stock reflects an assumption that a transaction will be completed. In addition, under circumstances defined in the Merger Agreement, we may be required to pay Boston Scientific Corporation a termination fee of $525.0 million in the event the Merger is not completed. Further, a failure to complete the Merger may result in negative publicity for us in the investment community. Any disruption to our business resulting from the announcement and pendency of the Merger, including any adverse changes in our relationships with our customers, suppliers, vendors and business partners could continue or accelerate in the event of a failure to complete the Merger. There can be no assurance that our business, these relationships or our financial condition will not be adversely affected if the Merger is not consummated.

We will continue to incur substantial transaction-related costs in connection with the Merger.

We have incurred significant legal, advisory and financial services fees in connection with Merger. We have incurred, and expect to continue to incur, additional costs in connection with the satisfaction of the various conditions to closing of the

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Merger, including seeking approval from our stockholders and from applicable regulatory authorities. If there is any delay in the consummation of the Merger, these costs could increase significantly.

We and our directors and officers may be subject to lawsuits relating to the Merger.

Litigation is very common in connection with the sale of public companies, regardless of whether the claims have any merit. One of the conditions to consummating the Merger is that no order enjoining, prohibiting or otherwise making illegal the consummation of the Merger shall have been issued by any governmental authority, including a court. Consequently, if any lawsuit challenging the Merger is successful in obtaining an order preventing the consummation of the Merger, that order may delay or prevent the Merger from being completed. While we will evaluate and defend against any lawsuits, the time and costs of defending against litigation relating to the Merger may adversely affect our business.

Provisions of the Merger Agreement may deter alternative business combinations and could negatively impact our stock price if the Merger Agreement is terminated in certain circumstances.

The Merger Agreement prohibits us from soliciting, initiating, knowingly facilitating or knowingly encouraging any inquiries, proposals or offers that would be reasonably expected to lead to certain alternative takeover proposals with any third party, and from taking other similar actions, subject to exceptions set forth in the Merger Agreement. The Merger Agreement also provides for the payment by us of a termination fee of $525.0 million if the Merger Agreement is terminated in certain circumstances in connection with a competing third-party acquisition proposal. These provisions limit our ability to pursue offers from third parties that could result in greater value to our stockholders. The obligation to pay the termination fee may also discourage a third party from pursuing an alternative acquisition proposal. If the Merger Agreement is terminated and we determine to seek another business combination, we cannot assure our stockholders that we will be able to negotiate a transaction with another company on terms comparable to the terms of the Merger Agreement, or that we will avoid incurrence of any fees associated with the termination of the Merger Agreement. In the event the Merger Agreement is terminated, our stock price may decline.

Because the market price of Boston Scientific Corporation common stock may fluctuate, holders of our common stock cannot be certain of the market value of the consideration they will receive in the Merger.

Under the terms of the Merger Agreement, subject to the terms and conditions set forth in the Merger Agreement, our stockholders will have the right to elect, for each share of our common stock held by them, to receive $374 in cash or 3.8721 shares of Boston Scientific Corporation’s common stock (valued at $374 based on the volume weighted average price of Boston Scientific Corporation’s common stock over the 10 trading days ending January 13, 2026), subject to proration, so that the total transaction consideration is paid approximately 73% in cash and approximately 27% in shares of Boston Scientific Corporation’s common stock.

The stock consideration payable in the Merger is fixed and will not be adjusted for changes in the market price of either Boston Scientific Corporation common stock or our common stock. Changes in the price of Boston Scientific Corporation common stock prior to the Merger will affect the value that holders of our common stock will receive in the Merger. Because the market price of Boston Scientific Corporation common stock may fluctuate, holders of our common stock cannot be certain of the market value of the consideration they will receive in the Merger.

Business Risks

Our existing products may be rendered obsolete and we may be unable to effectively introduce and market new products or may fail to keep pace with advances in technology.

The medical device market is highly competitive and is characterized by rapidly advancing technology. Product designs change often to adjust to shifting market preferences and other factors, and therefore product life cycles are relatively short. Our success and growth depends, in part, on our ability to anticipate technological advancements and competitive innovations and introduce new products to adapt to these advancements and innovations. Any delays in our product launches may significantly impede our ability to enter or compete in a given market and may reduce the sales that we are able to generate from these products. To compete in the marketplace, we have made, and we must continue to make, substantial investments in new product development, whether internally through research and development or externally through licensing or acquisitions. We can give no assurance that we will be successful in identifying, developing or acquiring, and marketing new products or enhancing our existing products. We may experience delays in any phase of a new product launch, including during research and development, clinical trials, regulatory review, manufacturing and marketing. In addition, we can give no assurance that new products or alternative treatment techniques developed by competitors will not render our current or future products obsolete or inferior, technologically or economically. Our competition may respond more quickly to new or emerging technologies or a

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changing clinical landscape, undertake more extensive marketing campaigns, have greater financial, marketing and other resources than us or be more successful in attracting potential customers and strategic partners.

The success of any new products that we develop or acquire depends on achieving and maintaining market acceptance. Market acceptance for our current and new products could be affected by a number of factors, including:

•our ability to market and distribute our products effectively;

•the availability, perceived efficacy and pricing of alternative products from our competitors;

•the development of new products or alternative treatments by others that render our products and technologies obsolete;

•the price, quality, effectiveness and reliability of our products;

•our customer service and reputation;

•our ability to convince specialist physicians and other healthcare providers to use our products on their patients; and

•the timing of market entry of new products or alternative treatments.

For example, treatment protocols for ischemic stroke patients vary according to the particular hospital, often resulting in significant delays and gaps in patients being assessed for and receiving interventional treatment. We believe that the stroke care system in the United States has not been historically geared towards interventional treatment of stroke due to the absence of clinical evidence that interventional techniques were effective. Specialist physician societies and we and our competitors are making efforts to alter the existing stroke care pathway, but we anticipate that these efforts will take years to be fully successful. The success of these efforts may depend on whether we and our competitors can effectively use substantial clinical data - demonstrating that intervention yields superior clinical results relative to cases where intervention is not used - to convince specialist physicians to use interventional techniques to treat ischemic stroke patients. Even if these efforts are successful, it may be years before existing systems and care pathways are changed.

Our inability to maintain or grow the market acceptance of our existing products, or to develop and market new products, could result in write-offs of our inventory and otherwise have a material and adverse effect on our business, results of operations, financial condition or cash flows.

We face significant competition, and if we are unable to compete effectively, we may not be able to achieve or maintain significant market penetration or improve our results of operations.

The medical device industry is intensely competitive, subject to rapid change and significantly affected by new product introductions and other market activities of industry participants. We compete with a number of manufacturers and distributors of neuro and vascular devices. Our most notable competitors are Boston Scientific, Medtronic, Stryker (now including Inari Medical), Terumo and several private companies. Most of these competitors are large, well-capitalized companies with longer operating histories and greater resources than us. We also compete with a number of smaller medical device companies that have a single product or a limited range of products. Our competitors may be able to spend more on product acquisition, development, marketing, sales and other product initiatives, or be more focused in their spending and activities, than we can. Some of our competitors have:

•significantly greater name recognition;

•broader or deeper relations with healthcare professionals, customers, group purchasing organizations and third-party payors;

•more established distribution networks;

•additional lines of products and the ability to offer rebates or bundle products to offer greater discounts or other incentives to gain a competitive advantage;

•greater experience in conducting research and development, manufacturing, clinical trials, marketing and obtaining regulatory clearance or approval for products; and

•greater financial and human resources for product development, sales and marketing and patent litigation.

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We compete primarily on the basis that our products are able to treat patients with neuro and vascular diseases and disorders and other health conditions safely and effectively, with improved outcomes and procedural cost savings. Our continued success depends on our ability to:

•develop innovative, proprietary products that can cost-effectively address significant clinical needs;

•continue to innovate and develop scientifically advanced technology;

•obtain and maintain regulatory clearances or approvals;

•demonstrate efficacy in Penumbra-sponsored and third-party clinical trials and studies;

•apply technology across product lines and markets;

•attract and retain skilled research and development and sales personnel; and

•cost-effectively manufacture and successfully market and sell products.

We cannot assure you that we will be able to compete effectively on the basis of these factors. Additionally, our competitors with greater financial resources could acquire or develop new technologies or products that effectively compete with our existing or future products. If we are unable to effectively compete, it would materially adversely affect our business, results of operations, financial condition and cash flows.

We may not be able to achieve or maintain satisfactory pricing and margins for our products.

Manufacturers of medical devices have a history of price competition, and we can give no assurance that we will be able to achieve satisfactory prices for our products or maintain prices at the levels we have historically achieved. If we are unable to achieve or maintain our prices, or if our costs increase and we are unable to offset such increase with an increase in our prices, our margins could erode and we may be unable to achieve or maintain profitable operations in the future. Events beyond our control, such as pandemics, war or geopolitical instability, can impact global supply chains, resulting in an increase in the cost of certain raw materials and components used in our products. While we have taken steps to reduce our manufacturing costs and to increase efficiencies, there can be no assurance that such measures will be successful or will reduce our costs commensurate with the increase in the cost of raw materials and components. If we are unable to increase our pricing or reduce our manufacturing costs in response to increases in the cost of raw materials and components used in our products, our business, results of operations, financial condition and cash flows may be materially adversely affected.

Our future growth depends, in part, on our ability to further penetrate our current customer base and increase the frequency of use of our products by our customers as well as expand our user base to include additional specialist physicians and other healthcare providers in both our existing and future target end markets.

Currently, the primary users of our products are specialist physicians, including interventional neuroradiologists, neurosurgeons, interventional neurologists, interventional radiologists, interventional cardiologists and vascular surgeons. Our future growth will require us to continue to make our current specialist physician and other healthcare provider customers aware of the benefits of our products to generate increased demand and frequency of use, and thus increase sales to such customers.

Our future growth will also depend on our ability to expand our customer base, which will require us to convince specialist physicians and other healthcare providers in our existing and future target end markets that are not current customers of our products’ efficacy, to educate them in the proper use of our products and to sell our products to their affiliated hospitals or other organizations. Convincing such specialist physicians and other healthcare providers to use new products and to dedicate the time and energy necessary for adequate education in the use of our products is challenging, especially in new markets where treatments or therapies using our products are not established.

Although we are attempting to increase the number of patients treated with our products through our established relationships and focused sales efforts, we cannot provide assurance that our efforts will increase the use of our products by our existing customers. In addition, expanding our customer base in existing and new target end markets may require, among other things, additional clinical evidence supporting patient benefits, training in a manner to which we are not accustomed, or other resources that we do not readily have available or are not cost effective for us to provide. If we are unable to increase the frequency of use of our products by our existing customers and expand our customer base to include additional specialist physicians and other healthcare providers in both our existing and future target end markets, our sales growth will be limited, which could materially adversely affect our business, results of operations, financial condition or cash flows.

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We may not have the resources to successfully market and sell our products, which would adversely affect our business and results of operations.

The marketing and sales of our products requires us to invest in training and education and employ a salesforce that is large enough to interact with the specialist physicians and other healthcare providers who use our products. Entering new markets also requires a significant amount of time and expense in order to identify and establish relationships with key opinion leaders among the specialist physicians and other healthcare providers who may use our products in those markets. We may not have adequate resources to market and sell our products successfully against larger competitors. If we cannot market and sell our products successfully, our business, results of operations, financial condition and cash flows could be materially adversely affected.

Third-party reimbursement may not be available or adequate for the procedures or sessions for which our products are used, and may be subject to change.

Our ability to commercialize new products successfully in both the United States and international markets depends in part on the availability of, and hospitals’ and other customers’ ability to obtain, adequate levels of third-party reimbursement for the procedures or sessions in which our products are used. In the United States, the cost of medical care is funded, in substantial part, by government insurance programs, such as Medicare and Medicaid, and private and corporate health insurance plans. Third-party payors may deny reimbursement if they determine that a device used in a procedure has not received appropriate FDA or other governmental regulatory clearances or approvals, is not used in accordance with cost-effective treatment methods as determined by the payor, or is experimental, unnecessary or inappropriate. Our ability to commercialize our products successfully will depend, in large part, on the extent to which adequate reimbursement levels for the cost of their use are obtained from government authorities, private health insurers and other organizations, such as health maintenance organizations. Further, healthcare in the United States and international markets is also being affected by economic pressure to contain reimbursement levels and costs, and various healthcare reform proposals have emerged and may continue to emerge at the U.S. state and federal level. Changing reimbursement models and the impact of healthcare reform laws, either domestically or internationally, could materially adversely affect our business, results of operations, financial condition or cash flows.

We have generated a significant portion of our revenue and revenue growth from a limited number of product families, and our revenue and business prospects would be adversely affected if sales of any of these product families were to decline.

We have generated most of our revenue and revenue growth from a limited number of product families. If any one or more of these product families were adversely affected because of regulatory, third-party reimbursement or intellectual property issues or any other reason, or if one of our competitors introduced one or more products that specialist physicians or other healthcare providers believe are superior to our products, our revenue from one of these product families could decline. A significant decline in our sales of any of these product families could also negatively impact our financial condition and our ability to conduct product development activities, and therefore negatively impact our business prospects.

If specialist physicians or other healthcare providers do not recommend and endorse, or use, our products or if our relationships with specialist physicians or other healthcare providers deteriorate, our products may not be accepted or maintain acceptance in the marketplace, which would adversely affect our business and results of operations.

Our products are sold primarily to hospitals for use by specialist physicians and other healthcare providers practicing at their facilities. In order for us to sell our products, specialist physicians and other healthcare providers must recommend and endorse them for the hospital to purchase them, and must use them in treating their patients to generate follow-on sales. We may not obtain the necessary recommendations or endorsements for new products from specialist physicians and other healthcare providers, our products may not receive approval from the relevant hospital’s value analysis committee, or we may not be able to maintain the current or future level of acceptance and usage of our products. Acceptance of our products depends on educating the medical community as to the distinctive characteristics, perceived benefits, safety, clinical efficacy and cost-effectiveness of our products compared to products of our competitors or treatments that do not use our products, and on training specialist physicians and other healthcare providers in the proper application and use of our products. We invest in significant training and education of our sales representatives, specialist physicians and other healthcare providers to achieve market acceptance of our products, with no assurance of success. If we are not successful in obtaining and maintaining the recommendations or endorsements of specialist physicians and other healthcare providers for our products, if specialist physicians and other healthcare providers prefer our competitors’ products or other alternative treatments that do not use our products, if our products do not receive approval from relevant hospitals’ value analysis committees, or if our products otherwise do not gain or maintain market acceptance, our business could be adversely affected.

In addition, the research, development, marketing and sales of our products are dependent, in part, upon our working relationships with specialist physicians and other healthcare providers. We rely on them to provide us with knowledge and

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feedback regarding our products and the marketing of our products. If we are unable to develop or maintain strong relationships with specialist physicians and other healthcare providers and receive their advice and input, the development and marketing of our products could suffer, which could materially adversely affect our business, results of operations, financial condition or cash flows.

Our dependence on key suppliers puts us at risk of interruptions in the availability of our products, which could reduce our revenue and adversely affect our results of operations.

We require the timely delivery of sufficient amounts of components and materials to manufacture our products. For reasons of quality assurance, cost effectiveness or availability, we typically procure certain raw materials and components from a single or limited number of suppliers. We generally acquire such raw materials and components through purchase orders placed in the ordinary course of business, and as a result we may not have a significant inventory of these materials and components and generally do not have any guaranteed or contractual supply arrangements with many of these suppliers. Our reliance on these suppliers subjects us to risks that could harm our business, including, but not limited to, difficulty locating and qualifying alternative suppliers. For example, FDA and regulators outside of the United States may require additional testing of any raw materials or components from new suppliers prior to our use of these materials or components. In the case of a device with clearance under Section 510(k) of the FD&C Act, referred to as a 510(k), we may be required to submit a new 510(k) if a change in a raw material or component supplier results in a change in a material or component supplied that is not within the 510(k) cleared device specifications. If we need to establish additional or replacement suppliers for some of these materials or components, our access to the materials or components might be delayed while we qualify such suppliers and obtain any necessary FDA approvals or clearances. Our suppliers may also be subject to regulatory inspection and scrutiny. Any adverse regulatory finding or action against those suppliers could impact their ability to supply us with raw materials and components for our products. We may also face delays, yield issues and quality control problems if we are required to locate and secure new sources of materials or components.

Our dependence on third-party suppliers involves several other risks, including limited control over pricing, availability, quality and delivery schedules. Suppliers of raw materials and components may decide, or be required, for reasons beyond our control, to cease supplying raw materials and components to us or to raise their prices. Shortages of raw materials, quality control problems, or production capacity constraints or delays by our suppliers could negatively affect our ability to meet our production requirements and result in increased prices for affected materials or components. Any material shortage, constraint or delay may result in delays in shipments of our products, which could materially adversely affect our results of operations.

Finally, some of our products are sterilized prior to use at a third-party sterilizer in the United States using ethylene oxide. The U.S. Environmental Protection Agency has proposed regulations aimed at reducing hazardous air pollutants, including emissions of ethylene oxide, and any future regulatory action that requires sterilization facilities to modify their sterilization processes to limit the use of ethylene oxide could impact the supply of sterilization services as well as the cost for such services. In addition, certain sterilization facilities in the United States have undergone temporary closures mandated by state agencies in recent years due to concerns over the impact of emissions of ethylene oxide from such facilities, and any future closures could lead to increased demand for sterilization services at the facilities we currently use to sterilize our products, which could prevent us from being able to sterilize our products at a pace sufficient to meet product demand and/or result in an increase in the cost of sterilization services. While we continue to work to improve our capacity and flexibility in connection with the sterilization of our products, any regulations that limit the use of ethylene oxide at, or any temporary or permanent closures of, sterilization facilities, including the facilities we currently use, could, due to the limited number of sterilization facilities and the time required to approve and license, and gain regulatory approval for us to use, a sterilization facility, impact our ability to obtain sterilization services on a timely basis or at commercially reasonable costs, which could materially adversely affect our results of operations.

We cannot be certain that we will be able to manufacture our products in high volumes at commercially reasonable costs.

We currently produce substantially all of our products at our manufacturing facilities in Alameda and Roseville, California, and, while we have entered into agreements to acquire property in Costa Rica and construct a manufacturing facility and warehouse for our products, we can give no assurance that these facilities will be adequate for our future needs. We may need to expend significant capital resources and further increase the size of our manufacturing capabilities as we grow our business. We could, however, encounter problems related to:

•capacity constraints;

•production yields;

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•quality control;

•equipment availability; and

•shortages of qualified personnel.

Our continuous product innovation may limit our ability to identify and implement manufacturing efficiencies. Failure to do so may reduce our ability to manufacture our products at commercially reasonable costs. If we are unable to manufacture our products in high volumes at commercially reasonable costs, it could materially affect our ability to fulfill customer orders on a timely basis, which could have a material adverse effect on our business, results of operations, financial condition or cash flows.

We are required to maintain high levels of inventory, which consume a significant amount of our working capital and could lead to permanent write-downs or write-offs of our inventory.

We maintain a significant inventory of raw materials, components and finished goods, which subjects us to a number of risks and challenges. Our hospital customers typically maintain only small quantities of our products at their facilities, so as products are used, they order replacements that typically require prompt delivery. As a result, we must maintain sufficient levels of finished goods to permit rapid shipment of products following receipt of a customer order. In turn, we must also maintain a sufficient supply of raw materials and components inventory to permit rapid manufacturing and re-stocking of finished goods. Furthermore, our coil inventory is supplied to hospital customers on a consignment basis, which means that it is classified as part of our inventory for financial reporting purposes but is maintained at the hospital location until it is used. We have built, and will continue to build, a significant inventory of coils in order to support the introduction of and to provide adequate consignment stock for our new and existing coil products.

Maintaining a significant inventory of raw materials, components and finished goods, including coils, consumes a significant amount of our working capital. This working capital could be used for other purposes, such as research and development or sales and marketing activities. As we grow our business, we may need substantial additional capital to fund higher levels of inventory, which may materially adversely affect our liquidity or result in dilution to our stockholders if we sell additional equity securities or leverage if we raise debt capital to finance our working capital requirements.

Maintaining a significant inventory of raw materials, components and finished goods, including coils, also subjects us to the risk of inventory excess and obsolescence, which may lead to a permanent write-down or write-off of our inventory. While in inventory, our components and finished goods may become obsolete, and we may over-estimate the amount of inventory needed, which may lead to excessive inventory. In these circumstances we would write-down or write-off our inventory and may be required to expend additional resources or be constrained in the amount of end product that we can produce. For example, during the three months ended June 30, 2024, we recorded a $33.4 million write-down of immersive healthcare inventory in connection with our strategic decision to explore alternative avenues for our immersive healthcare business. Furthermore, our products have a limited shelf life due to sterilization requirements, and part or all of a given product or component may expire, resulting in a decrease in value and potentially a permanent write-down of our inventory. In addition, maintaining a significant inventory of raw materials, components and finished goods at our facilities requires us to invest resources to safeguard such inventory and presents risk of misappropriation. In the event that a substantial portion of our inventory becomes excess or obsolete, or is otherwise damaged, misappropriated or destroyed, it could materially adversely affect our results of operations.

Defects or failures or alleged defects or failures associated with our products could lead to recalls, safety alerts, or product-related or securities litigation, as well as significant costs and negative publicity.

Manufacturing flaws, component failures, design defects, off-label uses or inadequate disclosure of product-related information could result in an unsafe condition or the injury or death of a patient. These problems could lead to a recall of, or issuance of a safety alert relating to, our products and result in significant costs, negative publicity and adverse competitive pressure. While we have had product recalls, they have all been voluntary. The circumstances giving rise to recalls are, however, unpredictable, and any recalls of existing or future products could materially adversely affect our business, results of operations, financial condition or cash flows.

The medical device industry has historically been subject to extensive litigation over product liability claims. There are high rates of mortality and other complications associated with some of the medical conditions suffered by the patients whom specialist physicians use our devices to treat, and we may be subject to product liability claims if our products cause, or merely appear to have caused, an injury or death. In addition, an injury or death that is caused by the activities of our suppliers, such as those that provide us with components and raw materials, or by an aspect of a treatment used in combination with our products, such as a complementary drug or anesthesia, may be the basis for a claim against us by patients, hospitals, healthcare providers

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or others purchasing or using our products, even if our products were not the actual cause of such injury or death. An adverse outcome involving one of our products could result in reduced market acceptance and demand for all of our products, and could harm our reputation and our ability to market our products in the future. In some circumstances, adverse events arising from or associated with the design, manufacture or marketing of our products could result in the suspension or delay of regulatory reviews of our premarket notifications or applications for marketing. Any of the foregoing problems could disrupt our business and have a material adverse effect on our business, results of operation, financial condition or cash flows.

Although we carry product liability insurance in the United States and in other countries in which we conduct business, including for clinical trials and product marketing, we can give no assurance that such coverage will be available or adequate to satisfy any claims. Product liability insurance is expensive, subject to significant deductibles and exclusions, and may not be available on acceptable terms, if at all. If we are unable to obtain or maintain insurance at an acceptable cost or on acceptable terms with adequate coverage or otherwise protect against potential product liability claims, we could be exposed to significant liabilities. A product liability claim, recall or other claim with respect to uninsured liabilities or for amounts in excess of insured liabilities could materially adversely affect our business, financial condition and results of operations. Defending a product liability suit, regardless of its merit or eventual outcome, could be costly, could divert management’s attention from our business and might result in adverse publicity, which could result in reduced acceptance of our products in the market, product recalls or market withdrawals.

In addition, the occurrence of an adverse event relating to our products, a product recall or a product liability claim against us may cause our stock price to decline, which could result in securities class action litigation claims against us. We were involved in one such lawsuit in 2021, which was voluntary dismissed without prejudice, and we may be the target of this type of litigation in the future. Any such litigation could result in substantial costs and a diversion of our management’s attention and resources.

Our products are continually the subject of clinical trials conducted by us, our competitors, or other third parties, the results of which may be unfavorable, or perceived as unfavorable, which could materially adversely affect our business, financial condition and results of operations.

As a part of the regulatory process of obtaining marketing clearance or approval for new products and new indications for existing products, as well as to provide specialist physicians and other healthcare providers with ongoing information regarding the efficacy of our products, we conduct and participate in numerous clinical trials with a variety of study designs, patient populations and trial endpoints. Our competitors and third parties also conduct clinical trials of our products without our participation. Unfavorable or inconsistent clinical data from existing or future clinical trials conducted by us, our competitors or third parties, or the market’s or regulators’ perception of clinical data, may reduce adoption of our products, which could materially adversely affect our business, results of operations, financial condition or cash flows.

Negative publicity regarding our products or marketing tactics by competitors or other third parties could reduce demand for our products, which would adversely affect sales and our financial performance.

We may experience, from time to time, negative exposure in clinical publications or in marketing campaigns of our competitors. Such publications or campaigns may present negative individual physician experience regarding the safety or effectiveness of our products or may suggest our competitors’ products are superior to ours, based on studies or clinical trials conducted or funded by competitors or that involved competitive products.

Our reputation and competitive position may also be harmed by other publicly available information suggesting that our products are not safe. For example, we file adverse event reports under Medical Device Reporting obligations with the FDA that are publicly available on the FDA’s website. We are required to file Medical Device Reports if our products may have caused or contributed to a serious injury or death or malfunctioned in a way that could likely cause or contribute to a serious injury or death if it were to recur. Any such negative publicity could harm our reputation and future sales.

Our corporate culture has contributed to our success, and if we cannot maintain this culture as we grow, we could lose the innovative approach, creativity, and teamwork fostered by our culture, and our business may be harmed.

We believe that a critical contributor to our success has been our corporate culture, which we believe fosters innovation, teamwork, and a focus on execution, as well as facilitates critical knowledge transfer and knowledge sharing. As we grow, we may find it difficult to maintain these important aspects of our corporate culture, which could limit our ability to innovate and operate effectively. Any failure to preserve our culture could also negatively affect our ability to retain and recruit personnel or execute on our business strategy.

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To successfully market and sell our products internationally, we must address a number of unique challenges applicable to international markets.

For the years ended December 31, 2025, 2024 and 2023, we derived 22.2%, 24.5% and 28.5%, respectively, of our revenue from international sales. To accommodate our international sales, we have invested significant financial and management resources to develop an international infrastructure that will meet the needs of our customers. We anticipate that a significant portion of our revenue will continue to be derived from sales of our products in foreign markets. This revenue and related operations will continue to be subject to the risks and challenges associated with international operations, including:

•reliance on distributors;

•varying coverage and reimbursement policies, processes and procedures;

•pricing impacts due to national and regional tenders, including value-based procurement practices and government-imposed payback provisions;

•difficulties in staffing and managing international operations from which sales are conducted;

•difficulties in penetrating markets in which our competitors’ products or alternative procedures that do not use our products are more established;

•reduced protection for intellectual property rights in some countries;

•export licensing requirements or restrictions, trade regulations and foreign tax laws;

•fluctuating foreign currency exchange rates;

•foreign certification, regulatory requirements and legal requirements;

•lengthy payment cycles and difficulty in collecting accounts receivable;

•customs clearance and shipping delays;

•reliance on third-party logistics providers who warehouse and distribute finished products to our international customers;

•pricing pressure in international markets;

•political and economic instability;

•preference for locally produced products;

•higher incidence of corruption or unethical business practices; and

•events resulting in negative impacts to, or uncertainty regarding, global trade, such as the reversal or renegotiation of international trade agreements and partnerships or the imposition of tariffs.

If we are unable to successfully address these challenges, we may not be able to grow our international sales and our results of operations may suffer as a result. For example, certain unique macroeconomic and geopolitical factors, including armed conflict in various parts of the world, may cause instability and volatility in the global financial markets and disruptions within the healthcare industry that may negatively impact our business. In addition, the United States federal government has imposed and/or threatened tariffs on a broad range of goods imported from several other countries, which has resulted in retaliatory tariffs imposed and/or threatened by other countries. Additional tariffs imposed by the United States, or further retaliatory trade measures taken by other countries in response, could result in an increase in supply chain costs or other pricing pressures that we may not be able to offset or may otherwise adversely impact our business and results of operations.

Over the long term, we intend to grow our business internationally, and to do so we will need to spend substantial sums to expand or develop direct sales capabilities in existing and new geographic areas, generate additional sales through existing distributors or attract additional distributors, or enter into other arrangements with third parties in international markets to commercialize our products in such markets. In December 2020, we agreed to license the technology for certain of our products to our existing distribution partner in China to permit our partner to manufacture and commercialize such products in China, in exchange for fixed payments upon the transfer of the distinct licensed technology and upon the provision of related regulatory support, as well as, in certain cases, royalty payments on downstream sales of the licensed products, which we expanded to

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include additional products in February 2022, September 2023 and March 2024. We can provide no assurance that this arrangement, which is novel for us, will be successful, or that we will benefit commercially from licensing our technology to a third party in exchange for fixed payments as opposed to selling our products through a distributor. In addition, transferring a portion of our technology to a partner based in China carries risks relating to the intellectual property being transferred. Historically, China has not protected intellectual property rights to the same extent as the United States, and infringement of intellectual property rights continues to pose a serious risk in doing business in China. Monitoring and preventing unauthorized use is difficult, and the measures we may take to protect our intellectual property rights may not be adequate to prevent misappropriation.

As a result of our international operations, we are required to comply with tax requirements in multiple jurisdictions, the scope and impact of which may be unclear. Moreover, tax authorities in jurisdictions in which we do business could disagree with tax positions that we take, including, for example, our inter-company pricing policies, or could assert that we owe more taxes than we currently pay due to the level and nature of our activities in such jurisdictions.

We rely on our distributors to market and sell our products in certain international markets.

We have established a direct sales capability in the United States, most of Europe, Canada, Australia and Singapore, which we have complemented with distributors in certain other international markets. Sales to distributors represented 10.0%, 13.2% and 16.7% of our revenue in 2025, 2024 and 2023, respectively. Our success outside of the United States, most of Europe, Canada, Australia and Singapore depends largely upon marketing arrangements with distributors, in particular their sales expertise and their relationships with specialist physicians and affiliated hospitals in their geographic areas. Distributors may terminate their relationship with us, sell competitive products or devote insufficient sales efforts or other resources to our products. We do not control our distributors, and they may not be successful in implementing our marketing plans. In addition, many of our distributors initially obtain and maintain foreign regulatory approval for the sale of our products in their respective countries, and their efforts in obtaining and maintaining regulatory approval may not be as robust as we desire or expect. As our business grows, we may seek to expand or otherwise modify our arrangements with our existing distributors and/or retain the services of additional distributors. For example, in December 2020, we entered into an agreement to license the technology for certain of our products to our existing distribution partner in China to permit our partner to manufacture and commercialize such products in China, in exchange for fixed payments upon the transfer of distinct the licensed technology and upon the provision of related regulatory support, as well as, in certain cases, royalty payments on downstream sales of the licensed products, which we expanded to include additional products in February 2022, September 2023 and March 2024. However, there can be no assurances that this arrangement, which is novel for us, or other similar arrangements that we may enter into in the future, will be successful. Our failure to maintain our relationships with our existing distributors or our partner in China, or our failure to recruit and retain additional skilled distributors in existing or new international markets, could have an adverse effect on our operations. If current or future distributors or our partner in China do not perform adequately, or if we lose a significant distributor or our partner in China, we may not be able to maintain existing levels of international revenue or realize expected long term international revenue growth. We have in the past experienced turnover with some of our distributors that has adversely affected sales in the countries in which those distributors operate. Similar occurrences could happen in the future.

Most of our customer relationships outside of the United States are with governmental entities, and we could be materially adversely affected by violations of the U.S. Foreign Corrupt Practices Act and similar anti-bribery laws in non-U.S. jurisdictions.

The FCPA, the United Kingdom Bribery Act, the Chinese Anti-Unfair Competition Law, and similar anti-bribery laws in other non-U.S. jurisdictions generally prohibit companies and their intermediaries from making improper payments to foreign officials for the purpose of obtaining or retaining business. Because of the predominance of government-sponsored healthcare systems around the world, most of our customer relationships outside of the United States are with governmental entities, and physicians practicing in those systems are considered “government officials.” Therefore, our sales to these entities are subject to such anti-bribery laws. Our policies mandate compliance with these anti-bribery laws. We operate in many parts of the world that have experienced governmental corruption, and we have operations in certain countries, including working with a distributor in Russia and a local partner in China, where strict compliance with anti-bribery laws may be at variance with local customs and practices. Despite our training and compliance programs, our internal control policies and procedures may not always protect us from reckless or criminal acts committed by our employees, distributors or agents. Violations of the FCPA or other anti-bribery laws, or allegations of such violations, could disrupt our business and materially adversely affect our business, results of operations, financial condition or cash flows.

Foreign currency exchange rates may adversely affect our results.

We are exposed to the effects of changes in foreign currency exchange rates, and we have not historically hedged our foreign currency exposure. Approximately 22.2%, 24.5%, and 28.5% of our revenue for the years ended December 31, 2025,

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2024 and 2023, respectively, were derived from sales in non-U.S. markets, and we expect sales in non-U.S. markets to continue to represent a significant portion of our revenue. For direct sales in our international markets, we are paid by our customers in their local currency, which is primarily euros. For sales to distributors in our international markets, we are paid principally in either U.S. dollars or euros, with some sales being denominated in other currencies. Therefore, when the U.S. dollar strengthens relative to the euro or other local currency, our U.S. dollar reported revenue from non-U.S. dollar denominated sales will decrease, or we will need to increase our non-U.S. dollar denominated prices, which may not be commercially practical. Conversely, when the U.S. dollar weakens relative to the euro or other local currency, our U.S. dollar reported expenses from non-U.S. dollar denominated operating costs will increase. Changes in the relative values of currencies occur regularly and, in some instances, could materially adversely affect our business, results of operations, financial condition or cash flows.

We have experienced rapid growth in recent periods, and if we fail to manage our growth effectively, our business and results of operations may suffer.

We have significantly expanded our overall business, research and development, customer base, product portfolio, employee headcount and operations in recent periods. We have also established new operations in other countries. Our expansion has placed, and our expected future growth will continue to place, a significant strain on our managerial, operational, product development, sales and marketing, administrative, financial and other resources.

We plan to continue to increase our salesforce. Our experience has been that it takes at least six months, and often longer, before new sales personnel generate enough sales to cover their costs, resulting in increased costs without offsetting revenue during periods in which we are increasing the size of our salesforce.

More systems, facilities, processes and management employees are needed to allow us to continue to grow successfully. We are expanding and renovating our existing facilities around the world, including in Alameda and Roseville California, and establishing new manufacturing facilities in Costa Rica, driven by our need to expand the space available for product manufacturing and product development and testing capacities, as well as our need for additional information technology and office space. The expansion and renovation of our facilities entail risks that could cause disruption in the operations of our business. Such risks include potential interruption in data flow; unforeseen construction, scheduling, engineering, environmental, or geological problems; and unanticipated cost increases. To meet anticipated demand for our products, we will also have to continue to buy additional equipment and hire additional research and development and manufacturing employees, including quality control personnel and other personnel involved in the production process. This expansion could result in operating difficulties including, but not limited to, difficulties in hiring the appropriate number of research and development and manufacturing employees, training and managing an increasing number of employees, delays in production and shipments, manufacturing inefficiencies and employees not working at capacity. In addition, at certain times we may need to rely on third party consultants, which may cost more than employees and may create operating inefficiencies and difficulties. If we do not adapt to meet these evolving challenges and if we are unable to manage our growth successfully, it could have a material and adverse effect on our business, results of operations, financial condition or cash flows.

We depend on key personnel to operate our business and develop our products, and if we are unable to retain, attract and integrate qualified personnel, our ability to develop and successfully grow our business could be harmed.

We believe that our future success is highly dependent on the contributions of our executive officers, particularly Adam Elsesser, our chief executive officer, as well as our ability to attract and retain highly skilled and experienced sales and marketing, technical and other personnel in the United States and in international markets. Each of these persons’ efforts will be critical to us as we continue to develop our products and business. If we were to lose one or more of our key employees, including to competitors, we may experience difficulties in competing effectively, developing our products and implementing our business strategies.

Our research and development and sales and marketing programs depend on our ability to attract and retain highly skilled technicians, engineers and salespeople. In general, we may not be able to attract or retain qualified employees in the future due to the intense competition for qualified personnel among life science businesses, particularly in the San Francisco Bay Area, where our corporate headquarters, research and development and primary manufacturing facility is located. In addition to the competition for personnel, the San Francisco Bay Area in particular is characterized by a high cost of living. Although we historically have not had any material difficulty attracting qualified experienced personnel to our company, we could in the future have such difficulties and may be required to expend significant financial resources in our employee recruitment and retention efforts. If we are not able to identify, recruit and retain highly qualified personnel, we may experience constraints that will adversely affect our ability to support our research, development, manufacturing and sales programs, and ultimately our ability to compete. If we are unable to identify, recruit and retain qualified salespeople, there could be a delay or decline in the adoption of our products. If key personnel were to leave Penumbra, either to join our competitors or otherwise, we may not be

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able to attract and retain equally qualified personnel to replace them, which could harm our ability to develop and successfully grow our business.

We depend on information technology systems to operate our business, and issues with maintaining, upgrading or implementing these systems, could have a material adverse effect on our business.

Source: SEC EDGAR (public domain) · 10-K for the period ended 2025-12-31, filed 2026-02-25 · accession 0001321732-26-000007

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