LH US Equity☆

Item 1A. RISK FACTORS

Investors should carefully consider all of the information set forth in this Annual Report, including the following risk factors, before deciding to invest in any of the Company’s securities. The risks below are not the only ones that the Company faces. Additional risks not presently known to the Company, or that it presently deems immaterial, may also negatively impact the Company. The Company’s business, consolidated financial condition, revenues, results of operations, profitability, reputation or cash flows could be materially impacted by any of these factors.

Risks Related to the Company's Business Including Global Economic and Sociopolitical Factors

General or macro-economic factors in the U.S. and globally may have a material adverse effect upon the Company, and significant fluctuations in global economic conditions and an increase in the costs of goods and services could negatively impact testing volumes, drug development services, cash collections, profitability, and the availability and cost of credit.

The Company’s operations are dependent upon ongoing demand for diagnostic testing and drug development services by

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patients, physicians, hospitals, MCOs, pharmaceutical, biotechnology and medical device companies and others. Fluctuations in global economic conditions, including inflation and the risk of short- or long-term recessions, could negatively impact demand for diagnostic testing and drug development services, the ability of customers to pay for the Company's services, and the Company’s profitability. In addition, uncertainty in the credit markets and interest rate volatility could reduce the availability and increase the cost of credit and impact the Company’s ability to meet its financing needs in the future.

Operations may be disrupted and adversely impacted by the effects of adverse weather, natural disasters, geopolitical events, public health crises, hostilities or acts of terrorism, acts of vandalism, disruption to supply chains, inaccessibility of natural resources, and other events beyond the Company's control.

Natural disasters, such as adverse weather, fires, earthquakes, power shortages and outages, geopolitical events, such as terrorism, war, political instability, or other conflict, public health crises and disease epidemics and pandemics, criminal activities, disruptions to supply chains, inaccessibility of natural resources, and other disruptions or events beyond the Company’s control could negatively affect the Company’s operations. Any of these events may result in a temporary decline of testing volumes and other work in both segments. In addition, such events may temporarily interrupt the Company’s ability to transport specimens, efficiently commence, continue, or complete its work on studies, utilize information technology systems, utilize certain laboratories, and/or to receive material from its suppliers. Such events can also affect customer operations and thereby impact testing volume. Long-term disruptions in the infrastructure and operations caused by such events (particularly involving locations in which the Company has operations), could harm the Company's operating results.

An inability to attract, retain, and develop experienced and qualified personnel, including key management personnel, and increased personnel costs, could adversely affect the Company’s business.

The loss of key management personnel or the inability to attract, retain, and develop experienced and qualified employees, at the Company’s clinical laboratories, drug development, and diagnostic facilities, and increased costs related to such personnel and employees, could adversely affect the business. The success of the Company is dependent in part on the efforts of key members of its management team. Success in maintaining the Company’s leadership position in genomic and other advanced testing and diagnostic technologies will depend in part on the Company’s ability to attract and retain skilled research professionals. In addition, the success of the Company’s early discovery, clinical, and commercial laboratories also depend on employing and retaining qualified and experienced professionals, including specialists, who perform laboratory research activities and testing services. The same is true for patient-facing staff with specialized training required to perform activities related to specimen collection or clinical research activities. In the future, if competition for the services of these professionals increases, the Company may not be able to continue to attract and retain individuals in its markets. Changes in key management, or the ability to attract, develop, and retain qualified personnel, as a result of increased competition for talent, wage growth, or other market factors, could lead to strategic and operational challenges and uncertainties, distractions of management from other key initiatives, and inefficiencies and increased costs, any of which could adversely affect the Company’s business, financial condition, results of operations, and cash flows.

Continued changes in healthcare reimbursement models and products (e.g., health insurance exchanges), changes in government payment and reimbursement systems, or changes in payer mix, including an increase in third-party benefits management and value-based payment models, could have a material adverse effect on the Company's revenues, profitability and cash flow.

Diagnostics Laboratories' (Dx) testing services are billed to MCOs, Medicare, Medicaid, physicians and physician groups, hospitals, patients, and employer groups. Most testing services are billed to a party other than the physician or other authorized person who ordered the test. Increases in the percentage of services billed to government and MCOs could have an adverse effect on the Company’s revenues.

The Company serves many MCOs. These organizations have different contracting philosophies, which are influenced by the design of their products. Some MCOs contract with a limited number of clinical laboratories and engage in direct negotiation of rates. Other MCOs adopt broader networks with generally uniform fee structures for participating clinical laboratories. In some cases, those fee structures are specific to independent clinical laboratories, while the fees paid to hospital-based and physician-office laboratories may be different, and are typically higher. MCOs may also offer Managed Medicare or Managed Medicaid plans. In addition, an increasing number of MCOs are implementing, directly or through third parties, various types of laboratory benefit management programs that may include laboratory networks, utilization management tools (such as prior authorization and/or prior notification), and claims edits, which may impact coverage or reimbursement for commercial laboratory tests. Some of these programs address commercial laboratory testing broadly, while others are focused on certain types of testing such as molecular, genetic and toxicology testing. An increase in the use of such programs could lead to increased denial of claims, extended appeals, and reduced revenue.

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Some MCOs use capitation rates to fix the cost of laboratory testing services for their enrollees. Under a capitated reimbursement arrangement, the clinical laboratory receives a per-member, per-month payment for an agreed upon menu of laboratory tests provided to MCO members during the month, regardless of the number of tests performed. Capitation shifts the risk of increased test utilization (and the underlying mix of testing services) to the commercial laboratory provider. The Company makes significant efforts to obtain adequate compensation for its services in its capitated arrangements. For the year ended December 31, 2023, such capitated contracts accounted for approximately $369.9 million, or 3.9%, of Dx's revenues.

The Company's ability to attract and retain MCOs is critical given the impact of healthcare reform, related products and expanded coverage (e.g. health insurance exchanges and Medicaid expansion) and evolving value-based care and risk-based reimbursement delivery models (e.g., accountable care organizations (ACOs) and Independent Physician Associations (IPAs)).

A portion of the managed care fee-for-service revenues is collectible from patients in the form of deductibles, coinsurance and copayments. As patient cost-sharing has been increasing, the Company's collections may be adversely impacted.

In addition, Medicare and Medicaid and private insurers have increased their efforts to control the cost, utilization and delivery of healthcare services, including commercial laboratory services. Measures to regulate healthcare delivery in general, and clinical laboratories in particular, have resulted in reduced prices, added costs and decreased test utilization for the commercial laboratory industry by increasing complexity and adding new regulatory and administrative requirements. Pursuant to legislation passed in late 2003, the percentage of Medicare beneficiaries enrolled in Managed Medicare plans has increased. The percentage of Medicaid beneficiaries enrolled in Managed Medicaid plans has also increased; however, changes to, or repeal of, the Patient Protection and Affordable Care Act (ACA) may continue to affect coverage, reimbursement, and utilization of laboratory services, as well as administrative requirements, in ways that are currently unpredictable. Further healthcare reform could adversely affect laboratory reimbursement from Medicare, Medicaid or commercial carriers.

The Company has periodically experienced delays in the pricing and implementation of coding and billing changes among various payers, including Medicaid, Medicare and commercial carriers. Payer policy changes in coverage, along with coding and billing changes, have had a negative impact over time on revenue, revenue per requisition, and margins and cash flows. In 2023, limited coding and billing changes were implemented. While limited changes are expected to be implemented in 2024, the Company typically expects some delays in pricing and reimbursement as new codes are introduced.

The Company expects the efforts to impose reduced reimbursement, more stringent payment policies, and utilization and cost controls by government and other payers to continue. If Dx cannot offset additional reductions in the payments it receives for its services by reducing costs, increasing test volume, and/or introducing new services and procedures, it could have a material adverse effect on the Company’s revenues, profitability and cash flows. In 2014, Congress passed PAMA, requiring Medicare to change the way payment rates are calculated for tests paid under the CLFS, and to base the payment on the weighted median of rates paid by private payers. On June 23, 2016, CMS issued a final rule to implement PAMA that required applicable laboratories, including Dx, to begin reporting their test-specific private payer payment amounts to CMS in 2017, based on data collected in 2016. CMS used that private market data to calculate weighted median prices for each test (based on applicable current procedural technology (CPT) codes) to represent the new CLFS rates beginning in 2018, subject to certain phase-in limits. For 2018-2020, a test price could not be reduced by more than 10% per year. As a result of provisions included within the CARES Act, PAMA rate reductions for 2021 were suspended, and therefore the Company did not experience any incremental reimbursement rate impact due to PAMA in 2021. As a result of the Protecting Medicare and American Farmers from Sequester Cuts Act that became law in December 2021, the data reporting requirements and Medicare reimbursement cuts that would have occurred under PAMA in 2022 were delayed by one additional year, and the Company did not experience incremental reimbursement rate impact due to PAMA in 2022. As a result of the Consolidated Appropriations Act, 2023, which became law in December 2022, the data reporting requirements and Medicare reimbursement cuts that would have occurred under PAMA in 2023 were delayed by one additional year, and the Company did not experience an incremental reimbursement rate impact due to PAMA in 2023. In November 2023, provisions in the Further Continuing Appropriations and Other Extensions Act of 2024 further delayed data reporting requirements and the phase-in of payment reductions for Clinical Diagnostic Laboratory Tests (CDLTs) that are not classified as ADLTs under PAMA. As a result, no payment reduction will be applied to CDLTs in 2024, and for 2025-2027 payment may not be reduced by more than 15% compared to the payment amount established for a test the previous year.

CLFS rates for 2028 and subsequent periods will not be subject to phase-in limits. The phase-in of rates for CDLTs established in 2018 will resume in 2025. New CLFS rates will be established in 2026 based on data from 2019 to be reported in 2025. The process of data reporting and repricing under PAMA will be repeated every three years for CDLTs beginning in 2025. CLFS rates for ADLTs will be updated annually.

CMS published its initial proposed CLFS rates under PAMA for 2018-2020 on September 22, 2017. Following a public comment period, CMS made adjustments and published final CLFS rates for 2018-2020 on November 17, 2017, with additional adjustments published on December 1, 2017. For 2020, the Company realized a net reduction in reimbursement of

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approximately $72.0 million from all payers affected by the CLFS (approximately $107.0 million in 2019). PAMA rates were frozen for years 2021 through 2024 as described above. Unless implementation of PAMA is further delayed or changed, an additional reduction of approximately $100.0 million is expected for 2025, from all payers affected by the CLFS.

Changes in government regulation or in practices relating to the pharmaceutical, biotechnology, or medical device industries could decrease the need for certain services that BLS provides.

BLS assists pharmaceutical, biotechnology, and medical device companies in navigating the regulatory approval process. Changes in government regulations, such as a relaxation in regulatory requirements or the introduction of simplified approval procedures or an increase in regulatory requirements that BLS may have difficulty satisfying or that may make its services less competitive, could eliminate or substantially reduce the demand for its services. Also, if government efforts to contain drug and medical product and device costs impact profits from such items, or if health insurers were to change their practices with respect to reimbursement for those items, some of BLS’s customers may spend less, or reduce their growth in spending on R&D.

In addition, proposed changes in the U.S. relating to FDA oversight of the development and commercialization of LDTs as medical devices pursuant to regulatory interpretation, as well as draft legislation, if implemented, could increase costs, penalties, or fines. Any such new laws or regulations may create a risk of liability, increase BLS costs and/or limit service offerings through BLS.

Increased competition, including price competition, could have an adverse effect on the Company’s revenues and profitability.

As further described in Item 1 of Part I of this Annual Report, both Dx and BLS operate in competitive industries. The commercial laboratory business is intensely competitive both in terms of price and service. Pricing of laboratory testing services is often one of the most significant factors used by physicians, third-party payers and consumers in selecting a laboratory. As a result of significant consolidation in the commercial laboratory industry, larger commercial laboratory providers are able to increase cost efficiencies afforded by large-scale automated testing. This consolidation results in greater price competition. Dx may be unable to increase cost efficiencies sufficiently, if at all, and as a result, its net earnings and cash flows could be negatively impacted by such price competition. The Company may face increased competition from health system laboratories, due to physicians within those systems directing their testing to the health system laboratory and away from the Company, and as those laboratories seek to expand their testing volume from unaffiliated physicians in their service areas. The Company may also face competition from companies that do not comply with existing laws or regulations or otherwise disregard compliance standards in the industry. Additionally, the Company may also face changes in fee schedules, competitive bidding for laboratory services, or other actions or pressures reducing payment schedules as a result of increased or additional competition.

Following the spin-off of Fortrea, BLS’s main competition ranges from hundreds of small providers to a limited number of large companies with global capabilities. BLS competes against these small and large businesses, as well as in-house departments of pharmaceutical, biotechnology, medical device, and diagnostic companies, and to a lesser extent, selected academic research centers, universities, and teaching hospitals. In addition, BLS’s services periodically experience periods of increased price competition that may have an adverse effect on the segment’s profitability and consolidated revenues and net income.

Failure to obtain and retain new customers, the loss of existing customers or material contracts, or a reduction in services or tests ordered or specimens submitted by existing customers, or the inability to retain existing and/or create new relationships with health systems could impact the Company’s ability to successfully grow its business.

To maintain and grow its business, the Company needs to obtain and retain new customers and business partners. In addition, a reduction in tests ordered or specimens submitted by existing customers, a decrease in demand for the Company's services from existing customers, or the loss of existing contracts, without offsetting growth in its customer base, could impact the Company's ability to successfully grow its business and could have a material adverse effect on the Company’s revenues and profitability. The Company competes primarily on the basis of reputation, efficient and timely performance, and leadership in science, technology and innovation. The Company's failure to successfully compete in any of these areas could result in the loss of existing customers, an inability to gain new customers, and reduced or stagnant growth of the Company's business.

Discontinuation or recalls of existing testing products; failure to develop or acquire licenses for new or improved testing technologies; or the Company’s customers using new technologies to perform their own tests could adversely affect the Company’s business.

From time to time, manufacturers discontinue or recall reagents, test kits, or instruments used by the Company to perform laboratory testing. Such discontinuations or recalls could adversely affect the Company’s costs, testing volume and revenue.

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The commercial laboratory industry is subject to changing technology and new product introductions. The Company’s success in maintaining a leadership position in genomic and other advanced testing technologies will depend, in part, on its ability to develop, acquire or license new and improved technologies on favorable terms and to obtain appropriate coverage and reimbursement for these technologies. The Company may not be able to negotiate acceptable licensing arrangements, and it cannot be certain that such arrangements will yield commercially successful diagnostic tests. If the Company is unable to license these testing methods at competitive rates, its R&D costs may increase as a result. In addition, if the Company is unable to license new or improved technologies to expand its esoteric testing operations, its testing methods may become outdated when compared with the Company’s competition, and testing volume and revenue may be materially and adversely affected.

In addition, advances in technology may lead to the development of more cost-effective technologies, such as point-of-care testing equipment that can be operated by physicians or other healthcare providers (including physician assistants, nurse practitioners, and certified nurse midwives, generally referred to herein as physicians) in their offices or by patients themselves without requiring the services of freestanding clinical laboratories. Development of such technology and its use by the Company’s customers could reduce the demand for its laboratory testing services and the utilization of certain tests offered by the Company and negatively impact its revenues. Similarly, application of artificial intelligence to testing could reduce demand for the Company's services, or competitors could adopt use of these technologies and derive benefits from them sooner than the Company.

Currently, most commercial laboratory testing is categorized as high or moderate complexity, and thereby is subject to extensive and costly regulation under CLIA. The cost of compliance with CLIA makes it impractical for most physicians to operate clinical laboratories in their offices, and other laws limit the ability of physicians to have ownership in a laboratory and to refer tests to such a laboratory. Manufacturers of laboratory equipment and test kits could seek to increase their sales by marketing point-of-care laboratory equipment to physicians and by selling test kits approved for home or physician office use to both physicians and patients. Diagnostic tests approved for home use are automatically deemed to be “waived” tests under CLIA and may be performed in physician office laboratories as well as by patients in their homes with minimal regulatory oversight. Other tests meeting certain FDA criteria also may be classified as “waived” for CLIA purposes. The FDA has regulatory responsibility over instruments, test kits, reagents and other devices used by clinical laboratories, and it has responsibility for classifying the complexity of tests for CLIA purposes. Increased approval of “waived” test kits could lead to increased testing by physicians in their offices or by patients at home, which could affect the Company’s market for laboratory testing services and negatively impact its revenues.

Changes or disruption in services, supplies, or transportation provided by third parties have impacted and could continue to impact or adversely affect the Company’s business.

The Company depends on third parties to provide supplies and services critical to the Company’s business. Although the Company has a significant proprietary network of ground and air transport capabilities, certain of the Company's businesses are heavily reliant on third-party ground and air travel for transport of clinical trial and diagnostic testing supplies and specimens, research products, and people. A significant disruption to these travel systems, or the Company's access to them, could have a material adverse effect on the Company's business. The Company is also reliant on an extensive network of third-party suppliers and vendors of certain services and products, including for certain animal populations. Disruptions to the continued supply, or increases in costs, of these services, products, or animal populations may arise from export/import restrictions or embargoes, political or economic instability, pressure from animal rights activists, adverse weather, natural disasters, public health crises, transportation disruptions, cybersecurity incidents, or other causes, as well as from termination of relationships with suppliers or vendors for their failure to follow the Company’s performance standards and requirements. Disruption of supply and services has impacted and could continue to impact or have a material adverse effect on the Company’s business.

A failure to identify and successfully close and integrate strategic acquisition targets could have a material adverse effect on the Company's business objectives and its revenues and profitability.

Part of the Company's strategy involves deploying capital in investments that enhance the Company's business, which includes pursuing strategic acquisitions to strengthen the Company's scientific capabilities and enhance therapeutic expertise, enhance esoteric testing and global drug development capabilities, and increase presence in key geographic areas. Since 2019, the Company has invested net cash of approximately $3.5 billion in strategic business acquisitions. However, the Company cannot assure that it will be able to identify acquisition targets that are attractive to the Company or that are of a large enough size to have a meaningful impact on the Company's operating results. Furthermore, the successful closing and integration of a strategic acquisition entails numerous risks, including, among others:

•failure to obtain regulatory clearance, including due to antitrust concerns;

•loss of key customers or employees as a result of the acquisition;

•difficulty in consolidating redundant facilities and infrastructure and in standardizing information and other systems;

•unidentified regulatory problems at the acquired company or business;

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•failure to maintain the quality of services that such companies or businesses have historically provided;

•unanticipated costs and other liabilities;

•potential liabilities related to litigation related to the acquired company or business, or from its prior owners;

•failure to timely identify and remediate noncompliant activities of the acquired company or business;

•potential periodic impairment of goodwill and intangible assets acquired;

•coordination of geographically separated facilities and workforces; and

•the potential disruption of the Company's ongoing business and diversion of management's resources.

The Company cannot assure that current or future acquisitions, if any, or any related integration efforts will be successful, or that the Company's business will not be adversely affected by any future acquisitions, including with respect to revenues and profitability. Even if the Company is able to successfully integrate the operations of companies and businesses that it acquires in the future, the Company may not be able to realize the benefits that it expects from such acquisitions.

Unfavorable labor environments, union strikes, work stoppages, union or works council negotiations, or failure to comply with labor or employment laws could adversely affect the Company's operations and have a material adverse effect upon the Company's business.

The Company is a party to a limited number of collective bargaining agreements with various labor unions and is subject to employment and labor laws and unionization activity in the U.S. Similar employment and labor obligations exist across other countries in which it conducts business, including appropriate engagement with works councils in Europe. Disputes with regard to the terms of labor agreements or obligations for consultation, potential inability to negotiate acceptable contracts with these unions, unionization activity, or a failure to comply with labor or employment laws could result in, among other things, labor unrest, strikes, work stoppages, slowdowns by the affected workers, fines and penalties. If any of these events were to occur, or other employees were to become unionized, the Company could experience a significant disruption of its operations or higher ongoing labor costs, either of which could have a material adverse effect upon the Company's business. Additionally, future labor agreements, or renegotiation of labor agreements or provisions of labor agreements, or changes in labor or employment laws, could compromise its service reliability and significantly increase its costs, which could have a material adverse effect upon the Company's business. Also, the Company may incur substantial additional costs and become subject to litigation and enforcement actions if the Company fails to comply with legal requirements affecting its workforce and labor practices, including laws and regulations related to wage and hour practices, Office of Federal Contract Compliance Programs compliance, and unlawful workplace harassment and discrimination.

Continued and increased consolidation of pharmaceutical, biotechnology and medical device companies, health systems, physicians and other customers could adversely affect the Company's business.

Many healthcare companies and providers, including pharmaceutical, biotechnology and medical device companies, health systems, and physician practices are consolidating through mergers, acquisitions, joint ventures, and other types of transactions and collaborations. In addition to these more traditional horizontal mergers that involve entities that previously competed against each other, the healthcare industry is experiencing an increase in vertical mergers, which involve entities that previously did not offer competing goods or services. As the healthcare industry consolidates, competition to provide goods and services may become more intense, and vertical mergers may give those combined companies greater control over more aspects of healthcare, including increased bargaining power. This competition and increased customer bargaining power may adversely affect the price and volume of the Company’s services.

In addition, as the broader healthcare industry trend of consolidation continues, including the acquisition of physician practices by health systems, relationships with hospital-based health systems and integrated delivery networks are becoming increasingly important. Dx has a well-established base of relationships with those systems and networks, including collaborative agreements. Dx's inability to retain its existing relationships with those physicians as they become part of healthcare systems and networks and/or to create new relationships could impact its ability to successfully grow its business.

Damage or disruption to the Company’s facilities or operations therein could adversely affect the Company’s business.

Many of the Company’s facilities or the operations conducted therein could be difficult to replace in a short period of time. Any event that causes a disruption of the operation of these facilities might impact the Company's ability to provide services to customers and, therefore, could have a material adverse effect on the Company's financial condition, results of operations, and cash flows.

The failure to establish, update, or perform to appropriate quality standards could adversely affect the Company’s business and reputation.

The Company has quality control systems and processes to support the performance and delivery of its services. A failure to establish, update, or perform in accordance with those systems or processes could adversely affect the Company’s business

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operations, resulting in the loss of customers, loss or suspension of licensure or certifications, imposition of sanctions or other penalties, damage to the Company’s reputation, or other adverse effects.

Risks Related to Financial Matters

The Company bears financial risk for contracts that, including for reasons beyond the Company's control, may be underpriced, subject to cost overruns, delayed, or terminated or reduced in scope.

The Company has many contracts that are structured as fixed-price for fixed-contracted services or fee-for-service with a cap. The Company bears the financial risk if these contracts are underpriced or if contract costs exceed estimates. Such underpricing or significant cost overruns could have an adverse effect on the Company's business, results of operations, financial condition, and cash flows.

Many of BLS’s contracts, in particular, provide for services on a fixed-price or fee-for-service with a cap basis and they may be terminated or reduced in scope either immediately or upon notice. Cancellations may occur for a variety of reasons, including:

•failure of products to satisfy safety requirements;

•unexpected or undesired results of the products;

•insufficient clinical trial subject enrollment;

•insufficient investigator recruitment;

•a customer's decision to terminate the development of a product or to end a particular study; and

•BLS’s failure to perform its duties properly under the contract.

Although BLS' contracts often entitle the Company to receive the costs of winding down the terminated projects, as well as all fees earned up to the time of termination, the loss, reduction in scope or delay of a large contract or the loss, delay or conclusion of multiple contracts could materially adversely affect BLS.

A significant increase in the Company's days sales outstanding could have an adverse effect on the Company’s business, including its cash flow, by increasing its bad debt or decreasing its cash flow.

Billing for laboratory services is a complex process. Laboratories bill many different payers, including doctors, patients, hundreds of insurance companies, Medicare, Medicaid, and employer groups, all of which have different billing requirements. In addition to billing complexities, Dx has experienced an increase in patient responsibility as a result of managed care fee-for-service plans that continue to increase patient deductibles, coinsurance and copayments, or implement restrictive coverage or administrative policies that can further increase patient costs. Dx expects this trend to continue. A material increase in Dx’s days sales outstanding level could have an adverse effect on the Company's business, including potentially increasing its bad debt rate and decreasing its cash flows. Although BLS does not face the same level of complexity in its billing processes, it could also experience delays in billing or collection, and a material increase in BLS’s days sales outstanding could have an adverse effect on the Company’s business, including potentially decreasing its cash flows.

BLS’s revenues depend on the pharmaceutical, biotechnology and medical device industries.

BLS’s revenues depend greatly on the expenditures made by the pharmaceutical, biotechnology and medical device industries in R&D. In some instances, these companies are reliant on their ability to raise capital in order to fund their R&D projects. These companies are also reliant on reimbursement for their products from government programs and commercial payers. Accordingly, economic factors and industry trends affecting BLS’s customers in these industries may also affect BLS. If these companies were to reduce the number of R&D projects they conduct or outsource, whether through the inability to raise capital, reductions in reimbursement from governmental programs or commercial payers, industry trends, economic conditions or otherwise, BLS could be materially adversely affected.

Foreign currency exchange fluctuations could have an adverse effect on the Company’s business.

The Company has business and operations outside the U.S., and BLS derives a significant portion of its revenues from international operations. Since the Company's consolidated financial statements are denominated in U.S. dollars, fluctuations in exchange rates from period to period will have an impact on reported results. In addition, BLS may incur costs in one currency related to its services or products for which it is paid in a different currency. As a result, factors associated with international operations, including changes in foreign currency exchange rates, could significantly affect BLS's results of operations, financial condition and cash flows.

The Company’s uses of financial instruments to limit its exposure to interest rate and currency exchange fluctuations could expose it to risks and financial losses that may adversely affect the Company’s financial condition, liquidity and results of operations.

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To limit the Company’s exposure to interest rate fluctuations and currency exchange fluctuations, it has entered into, and in the future may enter into for these or other purposes, financial swaps, or hedging arrangements, with various financial counterparties. In addition to any risks related to the counterparties, there can be no assurances that the Company’s hedging activity will be effective in insulating it from the risks associated with the underlying transactions, that the Company would not have been better off without entering into these hedges, or that the Company will not have to pay additional amountsupon settlement.

The Company’s level of indebtedness and debt service requirements could adversely affect the Company’s liquidity, results of operations and business.

At December 31, 2023, indebtedness on the Company's outstanding Senior Notes totaled approximately $4.2 billion in aggregate principal, of which $1.0 billion is payable within the next 12 months. The Company is also a party to credit agreements relating to a $1.0 billion revolving credit facility. Under the revolving credit facility, the Company is subject to negative covenants limiting subsidiary indebtedness and certain other covenants typical for investment-grade-rated borrowers, and the Company is required to maintain a leverage ratio within certain limits.

The Company’s level of indebtedness and debt service requirements could adversely affect its business. In particular, it could increase the Company’s vulnerability to sustained, adverse macroeconomic weakness, limit its ability to obtain further financing or refinance existing debt at maturity, and limit its ability to pursue certain operational and strategic opportunities, including large acquisitions. Additionally, the Company's cost of funds could increase due to the impact of increases in prevailing interest rates on its variable rate debt and should the Company refinance existing debt at maturity or obtain further financing.

The Company may also enter into additional transactions or credit facilities, including other long-term debt, which may increase its indebtedness and result in additional restrictions upon the business. In addition, major debt rating agencies regularly evaluate the Company's debt based on a number of factors. There can be no assurance that the Company will be able to maintain its existing debt ratings, and failure to do so could adversely affect the Company's cost of funds, liquidity and access to capital markets.

The Company's quarterly operating results may vary.

The Company's operating results may vary significantly from quarter to quarter and are influenced by factors over which the Company has little control, such as:

•changes in the global economy;

•currency exchange rate fluctuations;

•the commencement, completion, delay or cancellation of large projects or contracts or groups of projects;

•the progress of ongoing projects;

•adverse weather, natural disasters, geopolitical events, public health crises, hostilities or acts of terrorism, acts of vandalism, disruption to supply chains, inaccessibility of natural resources, and other events beyond the Company’s control;

•the timing of and costs associated with completed acquisitions or other events; and

•changes in the utilization mix of the Company's services.

The Company believes that operating results for any particular quarter are not necessarily a meaningful indication of future results. While fluctuations in the Company's quarterly operating results could negatively or positively affect the market price of the Company's common stock, these fluctuations may not be related to the Company's future overall operating performance.

The Company depends on a variety of U.S. and international financial institutions to provide us with banking services. The default or failure of one or more of the financial institutions that the Company relies on may adversely affect the Company's business and financial condition.

The Company maintains the majority of its cash and cash equivalents in accounts with major U.S. and international financial institutions, and its deposits at certain of these institutions exceed insured limits. Market conditions can impact the viability of these institutions. In the event of failure of any of the financial institutions where the Company maintains its cash and cash equivalents, there can be no assurance that the Company would be able to access uninsured funds in a timely manner or at all. Additionally, bank payment processes could become unavailable which could temporarily impact the Company's ability to conduct business with suppliers and pay its employees on a timely basis. Any inability to access or delay in accessing these funds could adversely affect the Company's business and financial condition.

The Company might not be able to engage in certain desirable capital-raising or strategic transactions.

The Company’s ability to engage in certain transactions could be limited or restricted in order to preserve, for U.S. federal income tax purposes, the tax-free qualification of the Fortrea spin-off and certain related transactions under Sections 355 and

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368(a)(1)(D) of the Internal Revenue Code. Even if the spin-off and certain related transactions otherwise qualify for tax-free treatment under Section 355 of the Code, they may result in corporate-level taxable gain to the Company if there is a 50% or greater change in ownership, by vote or value, of shares of the Company’s stock, Fortrea’s stock, or the stock of a successor of either occurring as part of a plan or series of related transactions that includes the spin-off, which is generally presumed to include any acquisitions or issuances of stock within two years of the spin-off. To avoid realizing such taxable gain, the Company may be restricted or limited in its capital-raising or in the strategic transactions that it elects to pursue during such time period.

The recently completed spin-off of Fortrea may not achieve the intended results.

On June 30, 2023, the Company completed the previously announced spin-off of Fortrea Holdings Inc. (Fortrea). The spin-off poses risks and challenges that could impact the Company’s business, including, but not limited to, the failure to achieve the intended benefits from the spin-off, the failure to receive tax- free treatment for U.S. federal income purposes, and potential exposure to unexpected claims, liabilities, or costs under the Company’s agreements with Fortrea in connection with the spin-off.

The spin-off may adversely impact relationships with customers, suppliers, employees, and other business counterparties and the Company may experience delays, business disruption, increased costs, including from lost synergies, which could adversely affect the Company’s business, financial condition, and results of operations. The Company may also experience increased challenges in attracting, retaining, and motivating key personnel, which could harm the Company’s business. The Company's ongoing transitional and commercial arrangements with Fortrea intend to provide for a seamless delivery of services to the customers and other stakeholders of the independent companies following the spin-off, but those arrangements may not meet the intended objectives and could have unexpected costs or challenges, which could negatively impact the Company’s business, including relationships with customers and other business counterparties, and which could also result in a decline in value of the Company.

Risks Related to Technology and Cybersecurity

Failure to maintain the security of customer-related information or compliance with security requirements could damage the Company’s reputation with customers, cause it to incur substantial additional costs and become subject to litigation and enforcement actions.

The Company receives and stores certain personal and financial information about its customers. In addition, the Company depends upon the secure transmission of confidential information over public networks, including information permitting cashless payments. The Company also works with third-party service providers and vendors that provide technology systems and services that are used in connection with the receipt, storage, and transmission of customer personal and financial information. A compromise in the Company’s security systems, or those of the Company's third-party service providers and vendors, that results in customer personal information being obtained by unauthorized persons, or the Company’s or a third party's failure to comply with security requirements for financial transactions, including security standards for payment cards (e.g., the Payment Card Industry Data Security Standard), could adversely affect the Company’s reputation with its customers and others, as well as the Company’s results of operations, financial condition and liquidity. It could also result in litigation against the Company and the imposition of fines and penalties. For example, in connection with the AMCA Incident (as defined below under “Cybersecurity” in Item 1C) the Company has incurred, and expects to continue to incur, costs, and the Company is involved in pending and threatened litigation, as well as various government and regulatory inquiries and processes. For additional information about the AMCA Incident, see Note 15 Commitments and Contingencies to the Consolidated Financial Statements of Part III of the Annual Report.

Failure in the Company’s information technology systems or delays or failures in the development and implementation of new systems or updates or enhancements to existing systems could disrupt the Company’s operations or customer relationships.

The Company’s operations and customer relationships depend, in part, on the continued performance of its information technology systems. A failure of the network or data-gathering procedures could impede the processing of data, delivery of databases and services, customer orders and day-to-day management of the business and could result in the corruption or loss of data. Despite network security measures and other precautions the Company has taken, including the development of disaster recovery plans, its information technology systems are potentially vulnerable to physical or electronic break-ins, computer viruses, fire, natural disaster, power loss, telecommunications failures, cybersecurity incidents and similar disruptions, and there may not be adequate protections, mitigation plans or redundant facilities available in the event of such system failures. In addition, the Company may experience system failures or interruptions as it integrates the information technology systems of newly acquired businesses. Failures or interruption of the Company’s systems in one or more of its operations could result in interruptions of service, disrupt the Company’s ability to process laboratory requisitions, perform testing, provide test results or drug development data in a timely manner and/or conduct timely billing operations. Such system failures could require the

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Company to transfer operations to an alternative provider of services, which could result in delays in the delivery of products and services to customers. Additionally, significant delays in the planned delivery of system enhancements or improvements, or inadequate performance of the systems once they are complete could damage the Company's reputation and harm the business. Furthermore, failure of the Company’s information technology systems could adversely affect the Company’s business, profitability, financial condition, and reputation.

Cybersecurity incidents and unauthorized access to the Company's or its customers’ data could harm the Company’s reputation and adversely affect its business.

The Company has experienced and expects to continue to experience attempts by computer programmers and hackers to penetrate the Company’s layered cybersecurity controls, like the 2018 ransomware attack. The Company has also experienced and expects to continue to experience similar attempts to penetrate the systems of third-party suppliers and vendors to whom the Company has provided data, like the 2019 AMCA data breach. These attempts, if successful, could result in the misappropriation or compromise of personal information or proprietary or confidential information stored within the Company's systems or within the systems of third parties, create system disruptions or cause shutdowns. External actors are developing and deploying viruses, worms and other malicious software programs that attack the Company’s systems, the systems of third-parties, or otherwise exploit any security vulnerabilities. Outside parties may also attempt to fraudulently induce employees to take actions, including the release of confidential or sensitive information or to make fraudulent payments through illegal electronic spamming, phishing, spear phishing, or other tactics.

The Company has robust information security procedures and other safeguards in place, including evaluating the cybersecurity status of third-party suppliers and vendors that will have access to the Company’s data or information technology systems, which are monitored and routinely tested internally and by external parties. However, because the techniques used to obtain unauthorized access, disable or degrade service, or sabotage systems change frequently and often are not recognized until launched against a target, the Company may be unable to anticipate all of these techniques or to implement adequate preventive measures. In addition, as cyber threats continue to evolve, the Company may be required to expend additional resources to continue to enhance the Company’s information security measures or to investigate and remediate any information security vulnerabilities. The Company’s remediation efforts may not be successful and could result in interruptions, delays or cessation of service. This could also impact the cost and availability of cyber insurance to the Company. Cybersecurity incidents affecting the Company’s or third parties' security measures and the unauthorized dissemination of personal, proprietary or confidential information about the Company or its customers or other third parties could expose customers’ private information. Such incidents could expose customers to the risk of financial or medical identity theft or expose the Company or other third parties to a risk of loss or misuse of this information, result in litigation and potential liability for the Company, damage the Company’s brand and reputation or otherwise harm the Company’s business. Any of these disruptions or incidents could have a material adverse effect on the Company’s business, regulatory compliance, financial condition and results of operations.

In addition, the Company faces increased cybersecurity risks due to the number of employees that continue to work remotely, which remains at levels higher than prior to the COVID-19 pandemic as a result of changes in the workplace and to management and employee expectations. Increased levels of remote access create additional opportunities for cybercriminals to exploit vulnerabilities, and employees may be more susceptible to phishing and social engineering attempts. In addition, technological resources may become strained due to the number of remote users.

The Company also faces potential cybersecurity risks from the use of artificial intelligence and machine learning (AI) tools. The Company, or its customers' sensitive, proprietary, or confidential information could be leaked, disclosed, or revealed as a result of or in connection with employees' or vendors' use of generative AI technologies. In addition, the Company may use AI outputs to inform certain decisions, and AI models may create incomplete, inaccurate, or otherwise flawed outputs, some of which may appear correct. Due to the potential flaws in the use of AI, the Company could make incorrect decisions, including decisions that could bias certain individuals or classes of individuals and adversely impact their rights. As a result, the Company could face adverse consequences, including exposure to reputational and competitive harm, customer loss, and legal liabilities. The AI tools may also be subject to additional, and as yet unidentified, security threats.

The Company depends on third parties to provide services critical to the Company's business, and depends on them to comply with applicable laws and regulations. Additionally, any cybersecurity incidents affecting the information technology systems of third parties could have a material adverse effect on the Company's operations.

The Company depends on third parties to provide services critical to the Company's business, including supplies, ground and air transport of clinical and diagnostic testing supplies and specimens, research products, and people, among other services. Third parties that provide services to the Company are subject to similar risks related to security of customer-related information and compliance with U.S., state, local, or international environmental, health and safety, and privacy and security laws and regulations as the Company. Any failure by third parties to comply with applicable laws, or any failure of third parties to provide services more generally, could have a material impact on the Company, whether because of the loss of the ability to

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receive services from the third parties, legal liability of the Company for the actions or inactions of third parties, or otherwise.

In addition, third parties to whom the Company outsources certain services or functions may process personal data, or other confidential information of the Company. A cybersecurity incident affecting these third parties, like the AMCA Incident, could also harm the Company's business, results of operations and reputation.

Risks Related to Regulatory and Compliance Matters

Changes in payer regulations or policies, insurance regulations or approvals, or changes in laws, regulations, or policies in the U.S. or globally, including changes in their interpretation, may adversely affect the Company.

U.S. and state government payers, such as Medicare and Medicaid, as well as insurers, including MCOs, have increased their efforts to control the cost, utilization and delivery of healthcare services. From time to time, Congress has considered and implemented changes in Medicare fee schedules in conjunction with budgetary legislation. The first phase of reductions pursuant to PAMA came into effect on January 1, 2018, and will continue subject to certain delays in implementation and phase-in limits through 2027, and without limitations for subsequent periods. Further reductions due to changes in policy regarding coverage of tests or other requirements for payment, such as prior authorization, diagnosis code and other claims edits, may be implemented from time to time. Medicare reimbursement for pathology services performed by Dx, which are paid for under the PFS, is also subject to statutory and regulatory reduction. Reductions in the reimbursement rates and changes in payment policies of other third-party payers may occur as well. Such changes in the past have resulted in reduced payments as well as added costs and have decreased test utilization for the commercial laboratory industry by adding more complex new regulatory and administrative requirements. Further changes in third-party payer regulations, policies, or laboratory benefit or utilization management programs may have a material adverse effect on Dx's business. Actions by federal and state agencies regulating insurance, including healthcare exchanges, or changes in other laws, regulations, or policies may also have a material adverse effect upon Dx's business.

The Company could face significant monetary damages and penalties and/or exclusion from government programs if it violates anti-fraud and abuse laws.

The Company is subject to extensive government regulation at the federal, state, and local levels in the U.S. and other countries where it operates. The Company’s failure to meet governmental requirements under these regulations, including those relating to billing practices and financial relationships with physicians, hospitals, and health systems, and others could lead to civil and criminal penalties, exclusion from participation in Medicare and Medicaid and possible prohibitions or restrictions on the use of its laboratories. While the Company believes that it is in material compliance with all statutory and regulatory requirements, there is a risk that government authorities might take a contrary position. This risk includes, but is not limited to, the potential that government enforcement authorities may take a contrary position with respect to the Eliminating Kickbacks in Recovery Act, given the lack of associated regulations to clarify or add exceptions. Such occurrences, regardless of their outcome, could damage the Company’s reputation and adversely affect important business relationships.

The Company’s business could be harmed from the loss or suspension of a license or imposition of a fine or penalties under, or future changes in, or interpretations of, the law or regulations of CLIA, Medicare, Medicaid or other national, state, or local agencies in the U.S. and other countries where the Company operates laboratories.

The commercial laboratory testing industry is subject to extensive U.S. regulation, and many of these statutes and regulations have not been interpreted by the courts. CLIA extends federal oversight to virtually all clinical laboratories operating in the U.S. by requiring that they be certified by the federal government or by a federally approved accreditation agency. The sanction for failure to comply with CLIA requirements may be suspension, revocation, or limitation of a laboratory’s CLIA certificate, which is necessary to conduct business, as well as significant fines and/or criminal penalties. In addition, the Company is subject to regulation under state law. State laws may require that laboratories and/or laboratory personnel meet certain qualifications, specify certain quality controls or require maintenance of certain records. The Company also operates laboratories outside of the U.S. and is subject to laws governing its laboratory operations in the other countries where it operates.

Applicable statutes and regulations could be interpreted or applied by a prosecutorial, regulatory or judicial authority in a manner that would adversely affect the Company's business. Potential sanctions for violation of these statutes and regulations include significant fines and the suspension or loss of various licenses, certificates, and authorizations, which could have a material adverse effect on the Company’s business. In addition, compliance with future legislation could impose additional requirements on the Company, which may be costly.

Failure of the Company or its third-party service providers to comply with privacy and data security laws and regulations could result in fines, penalties and damage to the Company’s reputation with customers and have a material adverse effect upon the Company’s business.

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If the Company and its third-party service providers do not comply with existing or new laws and regulations related to protecting the privacy and security of personal or health information, it could be subject to monetary fines, civil penalties, litigation, or criminal sanctions.

In the U.S., the Health Insurance Portability and Accountability Act of 1996, the U.S. Health Information Technology for Economic and Clinical Health (HITECH) Act, and their implementing privacy and security regulations (collectively, HIPAA) establish comprehensive standards with respect to the use and disclosure of protected health information (PHI), by covered entities as well as their "business associates" as defined in HIPAA, in addition to setting standards to protect the confidentiality, integrity and security of PHI.

HIPAA restricts the Company’s ability to use or disclose PHI, without patient authorization, for purposes other than payment, treatment or healthcare operations (as defined by HIPAA), except for disclosures for various public policy purposes and other permitted purposes outlined in the privacy regulations. HIPAA provides for significant fines and other penalties for wrongful use or disclosure of PHI in violation of the privacy and security regulations, including potential civil and criminal fines and penalties. The regulations establish a complex framework on a variety of subjects, including:

•the circumstances under which the use and disclosure of PHI are permitted or required without a specific authorization by the patient, including, but not limited to, treatment purposes, activities to obtain payments for the Company’s services, and its healthcare operations activities;

•a patient’s rights to access, amend and receive an accounting of certain disclosures of PHI;

•the content of notices of privacy practices for PHI;

•administrative, technical and physical safeguards required of entities that use or receive PHI; and

•the protection of computing systems maintaining electronic PHI.

The Company has implemented policies and procedures designed to comply with the HIPAA privacy and security requirements as applicable. The privacy and security regulations establish a “floor” and do not supersede state laws that are more stringent. Therefore, the Company is required to comply with both additional federal privacy and security regulations and varying state privacy and security laws. To the extent applicable, newer laws like the California Consumer Privacy Act (“CCPA”) as amended by the California Privacy Rights Act (“CPRA”), the Washington My Health My Data Act, and similar consumer privacy laws in other states, may impose additional obligations on the Company. Federal and state laws that protect the privacy and security of patient information may be subject to enforcement and interpretations by various governmental authorities and courts, resulting in complex compliance issues. In addition, laws regulating artificial intelligence and machine learning, including the use of algorithms and automated processing, may impact the Company and lead to increases in the cost of compliance. Noncompliance with these laws could result in the imposition of fines, penalties, or orders to stop certain activities, and potentially expose the Company to actions for the wrongful use or disclosure of health information or other personal information.

The Company may also be required to comply with the data privacy and security laws of other countries in which it operates or with which it transfers and receives data. For example, the EU's General Data Protection Regulation (GDPR), which took effect May 25, 2018, created a range of compliance obligations for subject companies and imposes penalties for noncompliance of up to the greater of €20 million or 4% of worldwide revenue for the most serious breaches of data protection obligations. The Company has established processes and frameworks to manage compliance with the GDPR. Potential fines and penalties in the event of a violation of the GDPR could have a material adverse effect on the Company’s business and operations. In addition, similar data protection regulations addressing access, use, disclosure and transfer of personal data have been enacted or updated in regions where the Company does business, including in Asia, Latin America, and Europe. The Company expects to make changes to its business practices and to incur additional costs associated with compliance with these evolving and complex regulations.

The Company's international operations could subject it to additional risks and expenses that could adversely impact the business or results of operations.

The Company's international operations expose it to risks from potential failure to comply with foreign laws and regulations that differ from those under which the Company operates in the U.S. In addition, the Company may be adversely affected by other risks of operations in foreign countries, including, but not limited to: changes in reimbursement by foreign governments for services provided by the Company; compliance with export controls and trade regulations; changes in tax policies or other foreign laws; compliance with foreign labor and employee relations laws and regulations; restrictions on currency repatriation; judicial systems that less strictly enforce contractual rights; countries that do not have clear or well-established laws and regulations concerning issues relating to commercial laboratory testing or drug development services; countries that provide less protection for intellectual property rights; and procedures and actions affecting approval, production, pricing, reimbursement and marketing of products and services. Further, international operations could subject the Company to additional expenses that the Company may not fully anticipate, including those related to enhanced time and resources

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necessary to comply with foreign laws and regulations, difficulty in collecting accounts receivable and longer collection periods, and difficulties and costs of staffing and managing foreign operations. In some countries, the Company's success will depend in part on its ability to form relationships with local partners. The Company's inability to identify appropriate partners or reach mutually satisfactory arrangements could adversely affect the business and operations.

International operations may increase the Company’s exposure to liabilities under applicable anti-corruption laws.

Anti-corruption laws in the countries where the Company conducts business, including the FCPA, U.K. Bribery Act, and similar laws in other jurisdictions, prohibit companies and their intermediaries from engaging in bribery including improperly offering, promising, paying or authorizing the giving of anything of value to individuals or entities for the purpose of corruptly obtaining or retaining business. The Company operates in parts of the world where corruption may be common and where anti-corruption laws may conflict to some degree with local customs and practices. The Company maintains an anti-corruption program including policies, procedures, training and safeguards in the engagement and management of third parties acting on the Company’s behalf. Despite these safeguards, the Company cannot guarantee protection from corrupt acts committed by employees or third parties associated with the Company. Violations or allegations of violations of anti-corruption laws could have a significant adverse effect on the business or results of operations.

Failure to comply with the regulations of pharmaceutical and medical device regulatory agencies, such as the FDA, the Medicines and Healthcare Products Regulatory Agency in the United Kingdom, the European Medicines Agency, the National Medical Products Administration in China (NMPA), and the Pharmaceuticals and Medical Devices Agency in Japan, could result in fines, penalties, and sanctions against BLS and have a material adverse effect upon the Company.

The operation of BLS's preclinical laboratory facilities and central laboratory operations must conform to good laboratory practice (GLP) and good clinical practice (GCP), as applicable, as well as all other applicable standards and regulations, as further described in Item 1 of Part I of this Annual Report. The business operations of BLS’s clinical and preclinical laboratories also require the import, export and use of medical devices, in vitro diagnostic devices, reagents, and human and animal biological products. Such activities are subject to numerous applicable local and international regulations with which BLS must comply. If BLS does not comply, BLS could potentially be subject to civil, criminal or administrative sanctions and/or remedies, including suspension of its ability to conduct preclinical and clinical studies, and to import or export to or from certain countries, which could have a material adverse effect upon the Company.

Additionally, certain BLS services and activities must conform to current good manufacturing practice (cGMP), as further described in Item 1 of Part I of this Annual Report. Failure to maintain compliance with GLP, GCP, or cGMP regulations and other applicable requirements of various regulatory agencies could result in warning or untitled letters, fines, unanticipated compliance expenditures, suspension of manufacturing, and civil, criminal or administrative sanctions and/or remedies against BLS, including suspension of its laboratory operations, which could have a material adverse effect upon the Company.

Increased regulations and restrictions on the import of research animals, limitations of supply of research animals, and actions of animal rights activists may have an adverse effect on the Company.

BLS's preclinical services utilize animals in preclinical testing of the safety and efficacy of drugs and devices. Such activities are required for the development of new medicines and medical devices under regulatory regimes in the U.S., Europe, Japan, and other countries. Increased regulations and restrictions on the import of research animals into various countries, as well as limitations of supply could impact BLS’s ability to conduct preclinical research and could have an adverse effect on BLS’s financial condition, results of operations, and cash flows. In addition, acts of vandalism and other acts by animal rights activists who object to the use of animals in drug development could have an adverse effect on the Company.

Animal populations may suffer diseases that can damage BLS's inventory, harm its reputation, or result in other liability.

It is important that research products be free of diseases, including infectious diseases. The presence of diseases can distort or compromise the quality of research results, cause loss of animals in BLS’s inventory, result in harm to humans or outside animal populations if the disease is not contained to animals in inventory, or result in other losses. Such results could harm BLS’s reputation or have an adverse effect on BLS's financial condition, results of operations, and cash flows.

Failure to conduct animal research in compliance with animal welfare laws and regulations could result in sanctions and/or remedies against BLS and have a material adverse effect upon the Company.

The conduct of animal research at BLS’s facilities must be in compliance with applicable laws and regulations in the jurisdictions in which those activities are conducted. These laws and regulations include the U.S. Animal Welfare Act (AWA), which governs the care and use of warm-blooded animals for research in the U.S. other than laboratory rats, mice and chickens, and is enforced through periodic inspections by the U.S. Department of Agriculture (USDA). The AWA establishes facility standards regarding several aspects of animal welfare, including housing, ventilation, lighting, feeding and watering, handling,

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veterinary care, and recordkeeping. Similar laws and regulations apply in other jurisdictions in which BLS conducts animal research, including the UK, EU, and China. BLS complies with licensing and registration requirement standards set by these laws and regulations in the jurisdictions in which it conducts animal research. If an enforcement agency determines that BLS’s equipment, facilities, laboratories or processes do not comply with applicable standards, it may issue an inspection report documenting the deficiencies and setting deadlines for any required corrective actions. For noncompliance, the agency may take action against BLS that may include fines, suspension and/or revocation of animal research licenses, or confiscation of research animals.

U.S. Food and Drug Administration (FDA) regulation of diagnostic products, increased FDA regulation of laboratory-developed tests (LDTs), and regulation by other countries of diagnostic products could result in increased costs and the imposition of fines or penalties, and could have a material adverse effect upon the Company’s business.

The FDA has regulatory responsibility for instruments, test kits, reagents and other devices used by clinical laboratories. The FDA enforces laws and regulations that govern the development, testing, manufacturing, performance, labeling, advertising, marketing, distribution, and surveillance of diagnostic products, and it regularly inspects and reviews the manufacturing processes and product performance of diagnostic products. Dx’s point-of-care testing devices are subject to regulation by the FDA.

LDTs developed by high complexity clinical laboratories are currently generally offered as services to health care providers under the CLIA regulatory framework administered by CMS, without the requirement for FDA clearance or approval. However, since the 1990s, the FDA has asserted that it has authority to regulate LDTs as medical devices but has exercised enforcement discretion to refrain from systematic regulation of LDTs. In 2014, the FDA issued draft guidance describing how it intended to discontinue its enforcement discretion policy and begin regulating LDTs as medical devices; however, that draft guidance has not been finalized, and the FDA has instead continued its enforcement discretion policy and has indicated that it intends to work with Congress to enact comprehensive legislative reform of diagnostics oversight. In February 2020, the FDA issued a statement with a table of pharmacogenetic associations setting forth certain gene-drug interactions that the agency determined are supported by the scientific literature to help ensure that claims being made for pharmacogenetic tests are grounded in sound science, thereby reducing the risk of enforcement actions with respect to LDTs offering claims consistent with the table. The FDA noted that it could take enforcement actions under the current medical device framework regarding diagnostic claims the agency determines not to be sufficiently supported. In addition, in 2021, the Verifying Accurate, Leading-edge, IVCT Development (VALID) Act was introduced to Congress and provided a framework to change in vitro diagnostics and LDTs to in vitro clinical tests. In 2022, the VALID Act was incorporated into the Senate user fee bill but was not included in the year-end Consolidated Appropriations Act of 2022. Following challenges with passing diagnostics reform legislation, the FDA released a proposed rule to clarify its authority to regulate LDTs as medical devices under the federal Food, Drug, and Cosmetic Act in October 2023. If finalized, FDA would phase out its general enforcement discretion approach for LDTs. Even without issuance of a finalized LDT oversight framework, in light of the April 4, 2019, FDA warning letter issued to Inova Genomics Laboratory related to certain LDTs that Inova offered, the February 2020 pharmacogenetics statement, and the 2023 proposed rule, there may be an increased risk of FDA enforcement actions for laboratory tests offered by companies without FDA clearance or approval. However, the outcome and its ultimate impact on the Company’s business is difficult to predict at this time.

Current FDA regulation of the Company’s diagnostic products and the potential forfuture increased regulation of the Company’s LDTs in the future could result in increased costs and administrative and legal actions for noncompliance, including warning letters, fines, penalties, product suspensions, product recalls, injunctions, and other civil and criminal sanctions, and could impair the development and commercialization of new tests, which could have a material adverse effect upon the Company.

Regulation of diagnostics products in jurisdictions outside the U.S. in which the Company operates may impact laboratory testing offered by the Company in both Dx and BLS. For example, the European Union In Vitro Diagnostics Regulation (Regulation (EU) 2017/746 (EU IVDR)) established a new legislative framework for in vitro diagnostic devices that are used in certain circumstances, and includes a rule-based classification and quality and safety standards. The EU IVDR, where applicable to BLS's services, could impact BLS's ability to support trials, result in increased costs and administrative and legal actions, and have an adverse effect.

Failure to comply with U.S., state, local, or international environmental, health and safety laws and regulations, including the U.S. Occupational Safety and Health Administration Act and the U.S. Needlestick Safety and Prevention Act, could result in fines, penalties and loss of licensure, and have a material adverse effect upon the Company.

As previously discussed in Item 1 of Part I of this Annual Report, the Company is subject to licensing and regulation under laws and regulations relating to the protection of the environment and human health and safety, including laws and regulations relating to the handling, transportation and disposal of medical specimens, infectious and hazardous waste and radioactive

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materials, as well as regulations relating to the safety and health of laboratory employees. Failure to comply with these laws and regulations could subject the Company to denial of the right to conduct business, fines, criminal penalties and/or other enforcement actions that would have a material adverse effect on its business. In addition, compliance with future legislation could impose additional requirements on the Company that may be costly.

Environmental, social and governance (ESG) matters and the perception of the Company’s activities in these areas by stakeholders may impact the Company’s business and reputation.

Governmental authorities, non-governmental organizations, customers, investors, external stakeholders, and employees are increasingly sensitive to ESG concerns, such as diversity and inclusion, climate change, water use, recyclability or recoverability of packaging, and plastic waste. This focus on ESG concerns may lead to new requirements that could result in increased costs associated with developing, manufacturing, and distributing the Company’s services and products. The Company’s ability to compete could also be affected by changing customer preferences and requirements and the failure to meet such customer expectations or demand, whether related to environmental concerns or other ESG matters. While the Company strives to improve its ESG performance, has established certain ESG goals and initiatives, and participates in various third-party assessments and reporting regimens, the Company risks negative stockholder reaction and activism, including from proxy advisory services, as well as damage to its brand and reputation, if the Company fails to meet its goals and initiatives or if the Company is perceived to not be acting responsibly in key ESG areas, including product quality and safety, diversity and inclusion, environmental stewardship, support for local communities, corporate governance and transparency, and addressing human capital factors in the Company’s operations. Responding to these ESG considerations and implementation of the Company’s ESG goals and initiatives involves risks and uncertainties, requires investments, and depends in part on third-party performance or data that is beyond the Company’s control. In addition, some stakeholders may disagree with the Company’s ESG goals and initiatives. If the Company does not meet the evolving and varied ESG expectations of its investors, customers and other stakeholders, the Company could experience reduced demand for its products, loss of customers, and other negative impacts on the Company’s business and results of operations.

Risks Related to Legal Matters

Adverse results in material litigation matters could have a material adverse effect upon the Company’s business.

The Company is currently and may continue to be subject in the ordinary course of business to legal actions related to, among other things, intellectual property disputes, contract disputes, data and privacy issues, professional liability and employee-related matters, which may be or may become material. The Company also has received and may in the future receive inquiries and requests for information from governmental agencies and bodies, including Medicare or Medicaid payers, requesting comment and/or information on various matters, including allegations of billing irregularities, billing and pricing arrangements, or privacy practices that are brought to its attention through audits or third parties. Legal actions can result in substantial monetary damages as well as damage to the Company’s reputation with customers, which could have a material adverse effect upon its business.

The failure to successfully obtain, maintain, and enforce intellectual property rights and defend against challenges to the Company’s intellectual property rights could adversely affect the Company.

Many of the Company’s services, products and processes rely on intellectual property, including patents, copyrights, trademarks, and trade secrets. In some cases, that intellectual property is owned by another party and licensed to the Company, sometimes exclusively. The value of the Company’s intellectual property relies in part on the Company’s ability to maintain its proprietary rights to such intellectual property. The Company has been in the past and may be unable in the future to obtain or maintain the proprietary rights to its intellectual property, to prevent attempted infringement against its intellectual property, or to defend against claims that it is infringing on another party’s intellectual property, and the Company could be adversely affected.

For example, in October 2020, Ravgen Inc. filed a patent infringement lawsuit against the Company alleging infringement of two Ravgen-owned U.S. patents. In September 2022, a jury rendered a verdict in favor of Ravgen on the remaining patent at issue and awarded damages of $272 million. In May 2023, a judge awarded Ravgen additional enhanced damages in the amount of $100 million. The Company strongly disagrees with the verdict, based on a number of legal factors, and will vigorously defend the lawsuit through the appeal process. On June 4, 2021, the Company also instituted proceedings before the Patent Trial and Appeal Board of the U.S. Patent and Trademark Office challenging the validity of the Ravgen patent at issue in the trial. In November 2022, the Patent Trial and Appeal Board issued a decision upholding the validity of the Ravgen patent, and the Company has filed an appeal of this decision.

Adverse effects resulting from the failure to successfully obtain, maintain, and enforce intellectual property rights and defend against challenges to the Company's intellectual property rights could include the Company having to abandon, alter and/or delay the deployment of products, services or processes that rely on such intellectual property; having to procure and pay

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for licenses from the holders of intellectual property rights that the Company seeks to use, having to pay damages, fines, court costs and attorney's fees in connection with intellectual property litigation, and reputational damage.

Changes in tax laws and regulations or the interpretation of such may have a significant impact on the financial position, results of operations, and cash flows of the Company.

U.S. and foreign governments continue to review, reform and modify tax laws, including with respect to the Organisation for Economic Co-operation and Development’s base erosion and profit shifting initiative. Changes in tax laws and regulations could result in material changes to the domestic and foreign taxes that the Company is required to provide for and pay.

In addition, the Company is subject to regular audits with respect to its various tax returns and processes in the jurisdictions in which it operates. Errors or omissions in tax returns, process failures or differences in interpretation of tax laws by tax authorities and the Company may lead to litigation, payments of additional taxes, penalties and interest.

Contract services in the drug development industry create liability risks.

In contracting to work on drug development trials and studies, BLS faces potential risks inherent to the provision of diagnostic information services for clinical trial participants. Users of BLS for clinical trials may have a greater sensitivity to errors than the users of services or products that are intended for other purposes, such as research only. Other potential liabilities may include:

•Errors or omissions that create harm to clinical trial subjects during a trial or to consumers of a drug after the trial is completed and regulatory approval of the drug has been granted;

•Risks that animals in BLS’s facilities may be infected with diseases that may be harmful and even lethal to themselves and humans despite preventive measures contained in BLS's business policies, including those for the quarantine and handling of imported animals; and

•Errors and omissions during a trial or study that may undermine the usefulness of a trial or study, or data from the trial or study or that may delay the entry of a drug to the market.

While BLS endeavors to include in its contracts provisions entitling it to be indemnified and entitling it to a limitation of liability, these provisions are not always successfully obtained and, even if obtained, do not uniformly protect BLS against liability arising from certain of its own actions. BLS could be materially and adversely affected if it were required to pay damages or bear the costs of defending any claim that is not covered by a contractual indemnification provision, or in the event that a party which must indemnify it does not fulfill its indemnification obligations, or in the event that BLS is not successful in limiting its liability or in the event that the damages and costs exceed BLS's insurance coverage. BLS may also be required to agree to contract provisions with clinical site selection or its customers related to the conduct of clinical trials, and BLS could be materially and adversely affected if it were required to indemnify a site or customer against claims pursuant to such contract terms. There can be no assurance that BLS will be able to maintain sufficient insurance coverage on acceptable terms.

Item 1B. UNRESOLVED STAFF COMMENTS

None.

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Item 1C. CYBERSECURITY

Risk Management and Strategy

Protecting the information maintained by the Company about its patients, customers, colleagues, and partners against external and internal threats is a priority for the Company. Accordingly, the Company invests in the development and implementation of cybersecurity policies, control standards, and control procedures, including a risk management and assessment program, security and event monitoring capabilities, an incident response plan, and other detection, prevention, and protection capabilities, including practices and tools to monitor and mitigate external and insider threats. The Company engages in a risk monitoring process through its Office of Information Security (OIS) within the Information Technology organization that seeks to identify the likelihood and impact of threats to its systems and data, and assesses the effectiveness of the controls in place.

Consistent with business requirements, components of the Company’s information technology and controls are assessed by independent third parties against various frameworks and standards. With the assistance of these frameworks and standards, the Company assesses risks from cybersecurity threats, monitors its information systems for potential vulnerabilities, and assesses those systems pursuant to the Company’s cybersecurity policies, control standards, and control procedures. Mitigation of identified threats and vulnerabilities may be delayed.

The Company has implemented an Incident Response Plan (IR Plan), which is aligned to its overall crisis management program. The IR Plan provides a framework for responding to and managing cybersecurity incidents. The IR Plan identifies applicable requirements for incident response, outlines processes for any applicable reporting, as well as provides protocols for incident evaluation, processes for notification and internal escalation of information to the Company’s senior management, and the Board and/or appropriate Board committees, as applicable. The IR Plan is reviewed, tested, and updated under the leadership of the Company’s Chief Information and Technology Officer (CITO) and Chief Information Risk Officer (CIRO).

The Company’s cybersecurity team also provides enterprise-wide cybersecurity training for employees to maintain and continuously improve the Company’s mitigation against human-driven risk.

Engagement with External Cybersecurity Professionals

The Company engages with third parties to assess the effectiveness of, and assist with, its cybersecurity risk and response systems and processes. These third parties include cybersecurity assessors, consultants, and other cybersecurity professionals who assist in the identification, verification, and validation of cybersecurity risks, as well as support associated mitigation or incident response plans when necessary.

Oversight of Third-Party Service Providers

The Company’s processes also are designed to evaluate the cybersecurity threat risks associated with its use of third-party service providers that have applicable levels of access to the Company’s data or information technology systems. The Company performs due diligence on third parties that have access to its systems, data, or facilities that house such systems or data, and it monitors cybersecurity threat risks identified through such due diligence.

Cybersecurity Incident Impact

The Company describes whether and how risks from identified cybersecurity threats, including as a result of any previous cybersecurity incidents, have materially affected or are reasonably likely to materially affect it, including its business and operating results, financial condition, and impact on the Company’s reputation and customer relationships, under the Summary of Material Risks section of this Annual Report, and under the “Risks Related to Technology and Cybersecurity” heading and subheadings thereunder in Part I, Item 1A. “Risk Factors” of this Annual Report, which disclosures are incorporated by reference herein.

In July 2018, the Company experienced a ransomware incident which affected certain Dx information technology systems. The incident also temporarily affected certain other information technology systems involved in conducting Company-wide operations. An investigation determined that the ransomware did not and could not transfer patient or client data outside of Company systems and that there was no theft or misuse of patient or client data. This incident did not have a material effect on the Company.

On May 14, 2019, Retrieval-Masters Credit Bureau, Inc. d/b/a/ American Medical Collections Agency (AMCA), an external collection agency, notified the Company about a security incident AMCA experienced that may have involved certain personal information about some of the Company's patients (the AMCA Incident). The Company is involved in pending and threatened litigation related to the AMCA Incident, as well as various government and regulatory inquiries and processes. For additional information about the AMCA Incident, see Note 15 Commitments and Contingencies to the Consolidated Financial Statements “Cybersecurity" and “Risk Factors - Risks Related to Technology and Cybersecurity”.

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Governance

The Company’s board of directors has oversight responsibility for the Company’s enterprise risk management process and it delegates oversight responsibility for certain significant functional areas of risk management to the board’s committees. The Audit Committee of the board of directors is responsible for oversight and review of the Company’s cybersecurity and other information technology risks, controls, and procedures, including the potential impact of such risks on the Company’s business, financial results, operations, and reputation, as well as the Company’s plans to mitigate cybersecurity risks and to respond to cybersecurity incidents.

The CIRO and CITO routinely present cybersecurity reports to the Audit Committee at its regularly scheduled meetings. These reports may address cyber risks and threats, the status of projects to strengthen the Company’s information security systems, assessments of the Company’s security program, prior incidents, and the emerging cyber threat landscape. In addition, the full Board receives briefings from the CIRO and CITO on at least an annual basis.

Management is responsible for day-to-day assessment and oversight of cybersecurity risks. At the senior management level, the CITO is responsible for overseeing the Company’s information technology systems, technology capabilities, and cybersecurity practices. The CITO has more than 30 years of experience working in information technology-related roles and is a member of the Company’s executive leadership team and reports to the Chief Executive Officer. Prior to joining the Company, the CITO held various chief information officer roles with global companies.

The CIRO, under the direction of the CITO, is responsible for overseeing the OIS. In this role, the CIRO oversees the cyber risk management function, which identifies cybersecurity threats, assesses cybersecurity risks, and supports the CITO and the Company in managing such risks. The CIRO has over 30 years of experience in information security, and prior to joining the Company held various chief information security officer roles, including seven years at a global healthcare company. The CIRO has also served on the board of directors of Health-ISAC, an organization of critical infrastructure owners and operators within the health and public health sectors.

The CITO and CIRO together lead efforts to design, implement and operate controls deemed appropriate for the management of Company information assets and systems. OIS manages the policies, control procedures, and control standards designed to identify, detect, protect against, respond to, and recover from cybersecurity threats and cybersecurity incidents. This group includes a cybersecurity operations team that is responsible for the information technology security monitoring and incident response activities, the latter covering the response coordination to cybersecurity incidents under the leadership and pursuant to the direction of the CIRO. OIS also oversees the Company’s cybersecurity training program for employees.

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Item 2. PROPERTIES

The Company's corporate headquarters are located in Burlington, North Carolina, and include facilities that are both owned and leased.

Labcorp Diagnostics (Dx) operates through a network of patient service centers, branches, rapid response laboratories, primary laboratories, and specialty laboratories. The table below summarizes certain information as to Dx's principal operating and administrative facilities as of December 31, 2023.

Location Nature of Occupancy

Primary Facilities:

Birmingham, Alabama Leased

Phoenix, Arizona Owned

Los Angeles, California Leased

Monrovia, California Leased

San Diego, California Leased

San Francisco, California Leased

Shelton, Connecticut Leased

Tampa, Florida Leased

South Bend, Indiana Leased

Wichita, Kansas Leased

Baltimore, Maryland Leased

Westborough, Massachusetts Leased

Troy, Michigan Leased

St. Paul, Minnesota Owned

Raritan, New Jersey Owned

Burlington, North Carolina (5) Owned/Leased

Research Triangle Park, North Carolina (3) Leased

Dublin, Ohio Owned

Tulsa, Oklahoma Leased

Brentwood, Tennessee Leased

Dallas, Texas Leased

Houston, Texas Leased

Herndon, Virginia Leased

Seattle, Washington Leased

Spokane, Washington (2) Leased

Oak Creek, Wisconsin Leased

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Biopharma Laboratory Services (BLS) operates on a global scale. The table below summarizes certain information as to BLS's principal operating and administrative facilities as of December 31, 2023.

Location Nature of Occupancy

Primary Facilities:

Mechelen, Belgium Leased

Shanghai, China (2) Leased/Owned

Muenster, Germany Owned

Bangalore, India Leased

Kawagoe, Japan Leased

Singapore Leased

Geneva, Switzerland (2) Owned/Leased

Eye, United Kingdom Owned

Harrogate, United Kingdom Owned

Huntingdon, United Kingdom Owned

Shardlow, United Kingdom Owned

York, United Kingdom Leased

Los Angeles, California Leased

Greenfield, Indiana Owned

Indianapolis, Indiana Leased

Bedford, Massachusetts Owned

Ann Arbor, Michigan Leased

Somerset, New Jersey Owned

Denver, Pennsylvania Leased

Brentwood, Tennessee Leased

Chantilly, Virginia Leased

Madison, Wisconsin Owned

All of the Company’s primary facilities have been built or improved for the purpose of providing commercial laboratory testing or biopharma laboratory services. The Company believes that these existing facilities and plans for expansion are suitable and adequate and will provide sufficient production capacity for the Company's currently foreseeable level of operations. The Company believes that if it were unable to renew a lease or if a lease were to be terminated on any of the facilities it presently leases, it could find alternate space at competitive market rates and readily relocate its operations to such new locations without material disruption to its operations.

Item 3. LEGAL PROCEEDINGS

See Note 15 Commitments and Contingencies to the Consolidated Financial Statements.

Item 4. MINE SAFETY DISCLOSURES

Not applicable.

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PART II

Item 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS, AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information

The Company's common stock, par value $0.10 per share, or Common Stock, trades on the New York Stock Exchange or NYSE under the symbol “LH.”

Holders

On February 23, 2024, there were approximately 1,188 holders of record of the Common Stock.

Transfer Agent

The transfer agent for the Company's Common Stock is Equiniti Trust Company, LLC, 48 Wall Street, Floor 23, New York, NY 10005, telephone: 800-468-9716, website: www.https://equiniti.com/us/.

Dividends

The Company initiated a quarterly dividend beginning in the second quarter of 2022. The Company’s ability to pay dividends is primarily dependent on earnings from operations, the adequacy of capital and the availability of liquid assets for distribution.

For the year ended December 31, 2023, the Company paid $254.0 million in Common Stock dividends. The Company expects common dividend declarations, if made, to occur in January, April, July, and October with payment dates in March, June, September and December, and are subject to Board approval. There can be no assurance that the Company will continue to pay quarterly cash dividends at the current rate or at all.

Common Stock Performance

The graph below shows the cumulative total return assuming an investment of $100 on December 31, 2018, in each of the Company’s Common Stock, the Standard & Poor’s, or S&P 500 Index and the S&P 500 Health Care Index, and assuming that all dividends were reinvested. For the purpose of this graph, the distribution of 100% of the outstanding Common Stock of Fortrea Holdings Inc. (Fortrea) to the Company's shareholders, pursuant to which Fortrea became an independent company, is treated as a non-taxable cash dividend of $33.11 per share, an amount equal to the opening price of Fortrea Common Stock when it began trading on June 20, 2023, that was deemed reinvested in the Company’s Common Stock at the closing price on June 20, 2023.

Comparison of Cumulative Total Return

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Issuer Purchases of Equity Securities (all amounts in millions, except per share amounts)

The following table sets forth information with respect to purchases of shares of the Company’s Common Stock made during the quarter ended December 31, 2023, by or on behalf of the Company:

October 1 - October 31 — $ — — $ 531.5

November 1 - November 30 — — — 531.5

During the year ended December 31, 2023, the Company purchased 4.8 shares of its Common Stock at an average price per share of $206.85 for a total cost of $1,000.0. When the Company repurchases shares, the amount paid to repurchase the shares in excess of the par or stated value is allocated to additional paid-in-capital unless subject to limitation or the balance in additional paid-in-capital is exhausted. Remaining amounts are recognized as a reduction in retained earnings. At the end of 2023, the Company had outstanding authorization from the Board to purchase up to $530.4 of the Company's Common Stock. The repurchase authorization has no expiration date.

During the year ended December 31, 2022, the Company purchased 4.7 shares of its Common Stock at an average price per share of $233.48 for a total cost of $1,100.0. When the Company repurchases shares, the amount paid to repurchase the shares in excess of the par or stated value is allocated to additional paid-in-capital unless subject to limitation or the balance in additional paid-in-capital is exhausted. Remaining amounts are recognized as a reduction in retained earnings.

Item 6. SELECTED FINANCIAL DATA

Not applicable.

Item 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (all amounts in millions, except per share amounts or as otherwise noted)

General

During the year ended December 31, 2023, the Company's revenues from continuing operations were $12.2 billion, an increase of 2.5% from $11.9 billion in 2022. The 2.5% increase in revenues for the year ended December 31, 2023, as compared to the corresponding period in 2022 was due to acquisitions, net of divestitures of 1.7%, organic revenue of 0.6%, and favorable foreign currency translation of 0.2%. The 0.6% increase in organic revenue was due to an 8.7% increase in the

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Company's organic Base Business (Base Business includes the Company's business operations except for COVID-19 PCR and antibody testing (COVID-19 Testing)), partially offset by an 8.1% decrease in COVID-19 Testing.

The Company defines organic growth as the increase in revenue excluding the year over year impact of acquisitions, divestitures, and currency. Acquisition and divestiture impact is considered for a twelve-month period following the close of each transaction.

On June 30, 2023, the Company completed the previously announced spin-off of Fortrea from the Company.

The spin-off of Fortrea was achieved through the Company’s pro-rata distribution of 100% of the outstanding shares of Fortrea Common Stock to holders of record of Labcorp Common Stock. Each holder of record of Labcorp Common Stock received one share of Fortrea Common Stock for every share of Labcorp Common Stock held at 5:00 p.m., Burlington, North Carolina time on June 20, 2023, the record date for the distribution.

In June 2023, Fortrea, prior to the spin-off and while a subsidiary of the Company, issued $570.0 of 7.500% senior secured notes due 2030 (the Fortrea Notes). The proceeds from the Fortrea Notes were used to fund cash payments of approximately $1,600.0 to the Company in connection with the spin-off. The Company does not guarantee the Fortrea Notes following the spin-off. Also in June 2023, Fortrea Holdings Inc. entered into three floating secured overnight financing rate (SOFR) credit facilities totaling $1,520.0. These are comprised of $450.0 Revolver maturing June 30, 2028; $500.0 Term Loan A maturing June 30, 2028; and $570.0 Term Loan B maturing June 30, 2030.

Upon closing of the spin-off transaction, Fortrea made a cash distribution to the Company of approximately $1,600.0 as partial consideration for the assets that the Company contributed to Fortrea in connection with the spin-off. The Company used these proceeds toward a 1000.0 accelerated share repurchase program and paying down $300.0 of debt that matured in 2023, with the remaining funds to be returned to shareholders through additional future share repurchases and/or cash dividends.

All current and historical operating results of Fortrea are presented as Discontinued Operations, net of tax, in the consolidated statement of operations. The spin-off is expected to be treated as tax-free for the Company and its shareholders for U.S. federal income tax purposes.

As a result of the spin-off of Fortrea, the Company recast segment results to exclude the historical results of the CDCS business for all periods presented. The remaining operations of the previously reported Drug Development segment has been renamed the Biopharma Laboratory Services segment.

Following the spin-off, the Company believes that it is positioned to:

•invest in R&D and innovation to develop and launch diagnostic advancements globally in key clinical areas including oncology, women's health, autoimmune disease and neurology through organic and inorganic opportunities;

•utilize its worldwide laboratory network to serve a broad, growing and global customer base including pharmaceutical and biotechnology companies, physicians, health systems, consumers, and other start-ups and laboratories that require lab services or diagnostic testing; and

•launch innovative tests globally, providing patients, physicians, health systems and pharmaceutical companies with access to its advanced science, technology and diagnostic capabilities.

Results of Operations

The following tables present the financial measures that management considers to be the most significant indicators of the Company's performance.

Years ended December 31, 2023, 2022, and 2021

Revenues

Years Ended December 31, Change

The 2.5% increase in revenues for the year ended December 31, 2023, as compared to the corresponding period in 2022 was due to acquisitions, net of divestitures of 1.7%, organic revenue of 0.6%, and favorable foreign currency translation of 0.2%. The 0.6% increase in organic revenue was due to an 8.7% increase in the Company's organic Base Business, partially offset by an 8.1% decrease in COVID-19 Testing.

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Dx revenues for the year ended December 31, 2023, were $9,415.1, an increase of 2.3% compared to revenues of $9,203.5 in the corresponding period in 2022. The increase was due to acquisitions of 2.3% and higher organic revenue of 0.2%, partially offset by unfavorable foreign currency translation of 0.2%. The 0.2% increase in organic revenue was due to a 10.7% contribution from organic Base Business, partially offset by a 10.5% decrease in COVID-19 Testing. Total Base Business growth compared to the Base Business in the prior year was 14.6%.

Total volume, measured by requisitions, increased by 0.6% as acquisition volume contributed growth of 2.5% and organic volume decreased by 1.9%. Organic volume was impacted by a 6.6% decrease in COVID-19 Testing, partially offset by a 4.8% increase in Base Business. Price/mix increased by 1.7% due to higher Base Business of 5.9%, partially offset by lower COVID-19 Testing of 3.8%, unfavorable foreign currency translation of 0.2%, and acquisitions of (0.2%).

BLS revenues for the year ended December 31, 2023, were $2,774.2, an increase of 2.9% over revenues of $2,697.3 in the corresponding period in 2022. The increase in revenues was primarily due to organic Base Business growth of 1.6% and favorable foreign currency translation of 1.5%, partially offset by divestitures, net of acquisitions of (0.3%). BLS backlog expected to convert to revenue in the next 12 months is $2,470.0 or 30.0%.

The 9.7% decrease in revenues for the year ended December 31, 2022, as compared to the corresponding period in 2021 was due to lower organic revenue of 10.0% and unfavorable foreign currency translation of 0.7%, partially offset by acquisitions net of divestitures of 1.0%. The 10.0% decrease in organic revenue was due to a 12.3% decrease in COVID-19 Testing, partially offset by a 2.3% increase in the Company's organic Base Business.

Dx revenues for the year ended December 31, 2022, were $9,203.5, a decrease of 11.2% compared to revenues of $10,363.6 in the corresponding period in 2021. The decrease was primarily due to lower organic revenue of 12.1% and unfavorable foreign currency translation of 0.1%, partially offset by acquisitions of 1.1%. The 12.1% decrease in organic revenue was due to a 15.6% decrease in COVID-19 Testing, partially offset by a 3.4% increase in organic Base Business.

Total volume, measured by requisitions, decreased by 7.5% as organic volume decreased by 8.4% and acquisition volume contributed growth of 0.8%. Organic volume was impacted by a 10.4% decrease in COVID-19 Testing, partially offset by a 2.0% increase in Base Business. Price/mix decreased by 3.7% due to lower COVID-19 Testing of 5.2% and unfavorable foreign currency translation of 0.1%, partially offset by higher Base Business of 1.4% and acquisitions of 0.2%.

BLS revenues for the year ended December 31, 2022, were $2,697.3, a decrease of 5.7% over revenues of $2,860.7 in the corresponding period in 2021. The decrease in revenues was primarily due to unfavorable foreign currency translation of 2.8%, lower organic base business growth of 2.3%, lower COVID-19 Testing of 1.3%, partially offset by acquisitions net of divestitures of 0.7%.

Cost of Revenues

Years Ended December 31, Change

Cost of revenues as a % of revenues 72.3 % 68.7 % 62.0 %

Cost of revenues increased 7.9% in 2023 as compared with 2022 and increased as a percentage of revenues to 72.3% in 2023 as compared to 68.7% in 2022. This increase in cost of revenues as a percentage of revenues was primarily due to a reduction in COVID-19 Testing revenues, higher personnel expenses and the impact of the Ascension Management Services Agreement, partially offset by organic Base Business growth and LaunchPad savings.

Cost of revenues were flat in 2022 as compared with 2021 and increased as a percentage of revenues to 68.7% in 2022 as compared to 62.0% in 2021. This increase in cost of revenues as a percentage of revenues was primarily due to a reduction in higher margin COVID-19 Testing, higher personnel expenses, and other inflationary costs, partially offset by organic Base Business growth and LaunchPad savings.

Selling, General and Administrative Expenses

Years Ended December 31, Change

Selling, general and administrative expenses as a percentage of revenues increased to 16.6% in 2023 compared to 14.9% in 2022. The increase in selling, general and administrative expenses as a percentage of revenues is primarily due to a reduction in

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COVID-19 Testing revenues, spin-off-related costs and higher personnel expenses, partially offset by the impact of the Ascension Management Services Agreement.

Selling, general and administrative expenses as a percentage of revenues increased to 14.9% in 2022 compared to 12.9% in 2021. The increase in selling, general and administrative expenses as a percentage of revenues is primarily due to a decrease in higher margin COVID-19 Testing and higher personnel costs, partially offset by LaunchPad savings.

Goodwill and Other Asset Impairments

Years Ended December 31, Change

Goodwill and other asset impairments $ 349.0 $ 261.7 $ — 33.4 % — %

The 2023 impairment charges were primarily comprised of $333.6 of goodwill impairment for the Early Development reporting unit, which is part of the BLS segment. Impairment charges for the year ended December 31, 2022 included $260.0 of goodwill impairment for the Early Development reporting unit and the impairment of a technology intangible asset. There were no goodwill and other asset impairments for the year ended December 31, 2021.

Amortization of Intangibles and Other Assets

Years Ended December 31, Change

The increase in amortization of intangibles and other assets for the year ended December 31, 2023 is primarily due to the impact of acquisitions.

The decrease in amortization of intangibles and other assets for the year ended December 31, 2022 is primarily due to $88.4 in amortization acceleration of certain intangible assets related to trade names as a result of the Company's rebranding initiative recognized during 2021, partially offset by the impact of acquisitions.

Restructuring and Other Charges

Years Ended December 31, Change

During 2023, the Company recorded net restructuring charges of $49.1. The charges were comprised of $33.4 in severance and other personnel costs, $22.3 in facility-related costs primarily associated with general integration activities. The charges were adjusted by the reversal of previously established liability of $1.7 in unused severance and $4.9 in unused facility-related costs.

During 2022, the Company recorded net restructuring charges of $54.0. The charges were comprised of $24.8 in severance and other personnel costs and $31.1 in facility-related costs primarily associated with general integration activities. The charges were adjusted by the reversal of previously established liability of $1.4 in unused severance and $0.5 in unused facility-related costs.

During 2021, the Company recorded net restructuring charges of $24.0. The charges were comprised of $12.4 in severance and other personnel costs, $12.0 in facility-related costs primarily associated with general integration activities. The charges were adjusted by the reversal of previously established liability of $0.3 in unused severance and $0.2 in unused facility-related costs.

Interest Expense

Years Ended December 31, Change

The increase in interest expense for 2023 as compared with the corresponding period in 2022 is primarily due to the increased interest rates on variable rate debt and higher borrowings under the Credit Facility.

The decrease in interest expense for 2022 as compared with the corresponding period in 2021 is primarily due to the costs of redeeming the outstanding 3.20% senior notes due February 1, 2022 and the 3.75% notes due August 23, 2022 and issuing the new senior notes in 2021 and lower outstanding debt partially offset by a higher average cost of debt in 2022.

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Equity Method Income, Net

Years Ended December 31, Change

Equity method income, net represents the Company's ownership share in joint venture partnerships along with equity investments in other companies in the health care industry. The decrease in income for 2023 as compared with the corresponding period in 2022 was partially due to the sale of the Company's interest in one joint venture and the acquisition of the remaining interest in another joint venture during 2023.

Equity method income, net represents the Company's ownership share in joint venture partnerships along with equity investments in other companies in the health care industry. The decrease in income for 2022 as compared with the corresponding period in 2021 was primarily due to the decreased profitability of the Company's joint ventures in 2022.

Other, Net

Years Ended December 31, Change

The change in Other, net for the year ended December 31, 2023, as compared to the year ended December 31, 2022, was primarily due to $46.1 of transition services fees charged to Fortrea related to administrative and information technology systems support.

The change in Other, net for the year ended December 31, 2022, as compared to the year ended December 31, 2021, was primarily due to investment losses of $19.6 compared to $61.8 of investment gains in the corresponding period of 2021.

Income Tax Expense

Years Ended December 31,

Income tax expense as a % of income before tax 33.1 % 18.9 % 23.9 %

The increase in effective tax rate as compared with the prior year is primarily attributable to the unfavorable impact of current year goodwill impairment of the early development reporting unit. In contrast, the 2022 goodwill impairment of the early development reporting unit was more than offset by favorable adjustments attributable to research and development tax credits, changes in effective state income tax rates, and deferred tax adjustments.

The 2022 effective tax rate was favorably impacted by the Company's research and development tax credits, changes in effective state income tax rates, and deferred tax adjustments. During the third quarter of 2022, the Company completed a detailed domestic research and development tax credit analysis for the 2019, 2020, and 2021 tax years that resulted in an incremental income tax benefit. The 2021 effective tax rate was favorably impacted by stock-based compensation arrangements that was offset by the deferred revaluation related to the U.K. rate change.

Operating Results by Segment

During the fourth quarter of 2022, the Company modified the segment performance measure to exclude the amortization of intangibles and other assets, restructuring and other charges, goodwill and other asset impairments, and certain corporate charges for items such as transaction costs, COVID-19 costs, and other special items. These changes align with how the chief operating decision maker now evaluates segment performance and allocates resources. Prior periods have been conformed for

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comparability.

Years Ended December 31, Change

Dx operating income was $1,591.3 for the year ended December 31, 2023, a decrease of 21.4% over operating income of $2,025.5 in the corresponding period of 2022, and Dx operating margin decreased 510 basis points year-over-year. The decrease was primarily due to a reduction in COVID-19 Testing and higher personnel costs, partially offset by a demand in the Base Business.

BLS operating income was $396.3 for the year ended December 31, 2023, an increase of 1.8% from operating income of $389.1 in the corresponding period of 2022, and BLS operating margin decreased 10 basis points year over year. The change was primarily due to demand growth and LaunchPad savings, partially offset by higher personnel expense and non-human primate (NHP) related constraints.

General corporate expenses are comprised primarily of administrative services such as executive management, human resources, legal, finance, corporate affairs, and information technology. Corporate expenses were $644.1 for the year ended December 31, 2023, an increase of 37.4% over corporate expenses of $468.8 in the corresponding period of 2022, primarily due to spin-off transaction costs, personnel costs, bonus allocation, and research and development costs.

Dx operating income was $2,025.5 for the year ended December 31, 2022, a decrease of 36.8% over operating income of $3,205.6 in the corresponding period of 2021, and Dx operating margin decreased 890 basis points year over year. The decrease in operating income and margin were primarily due to a reduction in COVID-19 Testing, higher personnel expense, the mix impact from the integration of Ascension's laboratory business, partially offset by organic Base Business growth.

BLS operating income was $389.1 for the year ended December 31, 2022, a decrease of 22.3% from operating income of $501.0 in the corresponding period of 2021, and BLS operating margin decreased 310 basis points year over year. The decrease was primarily due to a reduction in COVID-19 Testing, a reduction in COVID-19 related work, and other inflationary costs. These impacts were partially offset by Base Business growth and LaunchPad savings.

General corporate expenses are comprised primarily of administrative services such as executive management, human resources, legal, finance, corporate affairs, and information technology. Corporate expenses were $468.8 for the year ended December 31, 2022, an increase of 15.9% over corporate expenses of $404.5 in the corresponding period of 2021, primarily due to higher personnel costs, bonus allocation, research and development costs, and other costs.

Liquidity, Capital Resources and Financial Position

The Company's strong cash-generating capability and financial condition typically have provided ready access to capital markets. The Company's principal source of liquidity is operating cash flow, supplemented by proceeds from debt offerings. The Company's senior unsecured revolving credit facility is further discussed in Note 11 Debt to the Company's Consolidated Financial Statements.

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In summary the Company's cash flows were as follows:

For the Year Ended December 31,

Net cash used for continuing investing activities (1,146.8) (1,599.6) (845.7)

Net cash used for continuing financing activities (1,559.0) (1,322.2) (2,065.8)

Effect of exchange rate on changes in cash and cash equivalents 9.9 (24.2) (7.3)

Net change in cash and cash equivalents $ 106.8 $ (1,042.7) $ 151.9

Cash and Cash Equivalents

Cash and cash equivalents at December 31, 2023 and 2022 totaled $536.8 and $320.6, respectively. Cash and cash equivalents consist of highly liquid instruments, such as time deposits and other money market investments, which have original maturities of three months or less.

Cash Flows from Operating Activities

During the year ended December 31, 2023, the Company's continuing operations provided $1,202.3 of cash as compared to $1,764.8 in 2022 and $2,846.3 in 2021. The $562.5 decrease in cash provided from operations in 2023 as compared with the corresponding 2022 period was primarily due to lower COVID-19 Testing earnings, spin-off related items and higher working capital, partially offset by increased Base Business earnings. The $1,081.5 decrease in cash provided from operations in 2022 as compared with the corresponding 2021 period was primarily due to lower COVID-19 Testing.

Cash Flows from Investing Activities

Net cash used by continuing investing activities for the year ended December 31, 2023 was $1,146.8 as compared to net cash used by continuing investing activities of $1,599.6 for the year ended December 31, 2022 and $845.7 for the year ended December 31, 2021. The $452.8 decrease in net cash used by investing activities for the year ended December 31, 2023 as compared to the year ended December 31, 2022, was primarily due to a year over year decrease of $492.5 in cash paid for acquisitions. The $753.9 increase in net cash used by investing activities for the year ended December 31, 2022 as compared to the year ended December 31, 2021, was primarily due to a year over year increase of $667.1 in cash paid for acquisitions and a year over year decrease in proceeds from sale of $85.9.

Capital expenditures were $453.6, $429.3, and $421.5 for the years ended December 31, 2023, 2022, and 2021, respectively. Capital expenditures in 2023 were 3.7% of revenues, primarily in connection with projects to support growth in the Company's core businesses. The Company intends to continue to pursue acquisitions to drive growth, to make important investments in its business, including in information technology, and to improve efficiency and enable the execution of the Company's mission. Such expenditures are expected to be funded by cash flow from operations or, as needed, through borrowings under debt facilities, including the Company's revolving credit facility or any successor facility. The Company expects capital expenditures in 2024 to be approximately 3.5% of revenues, primarily in connection with projects to support growth in the Company's core businesses, facility updates, projects related to LaunchPad, and further acquisition integration initiatives.

Cash Flows from Financing Activities

Net cash used in continuing financing activities for the year ended December 31, 2023 was $1,559.0 compared to cash used in continuing financing activities of $1,322.2 for the year ended December 31, 2022. This movement in cash within financing activities for 2023, as compared to 2022, was primarily a result of $1,000.0 of share repurchases and $300.0 in senior note repayments in 2023 compared to $1,100.0 of share repurchases in 2022 and the commencement of quarterly dividend payments in the second quarter of 2022.

On May 26, 2021, the Company issued new senior notes representing $1,000.0 in debt securities and consisting of $500.0 aggregate principal amount of 1.55% senior notes due 2026 and $500.0 aggregate principal amount of 2.70% senior notes due 2031. Interest on these notes is payable semi-annually in arrears on June 1 and December 1 of each year, commencing on December 1, 2021. Net proceeds from the offering of these notes were $989.4 after deducting underwriting discounts and other expenses of the offering. The net proceeds were used to redeem, prior to maturity, the Company's outstanding 3.20% senior notes due 2022 and 3.75% senior notes due 2022.

During the second quarter of 2021, the Company entered into fixed-to-variable interest rate swap agreements for its 2.70% senior notes due 2031 with an aggregate notional amount of $500.0 and variable interest rates based on three-month LIBOR (changed to SOFR in 2023) plus 1.0706%. These instruments are designated as hedges against changes in the fair value of a portion of the Company's long-term debt. The aggregate fair value of $69.6 at December 31, 2023, was included as a

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component of other long-term liabilities and deducted from the reported value of the senior notes.

On April 30, 2021, the Company amended and restated its revolving credit facility. It consists of a five-year revolving facility in the principal amount of up to $1,000.0, with the option of increasing the facility by up to an additional $500.0, subject to the agreement of one or more new or existing lenders to provide such additional amounts and certain other customary conditions. The Company is required to pay a facility fee on the aggregate commitments under the revolving credit facility, at a per annum rate ranging from 0.100% to 0.225%, depending on the Company’s debt ratings. Borrowings under the revolving credit facility will accrue interest at a per annum rate equal to, at the Company’s election, either (x) a LIBOR (changed to SOFR in 2023) rate plus a margin ranging from 0.775% to 1.275% or (y) a base rate plus a margin ranging from 0% to 0.275%, in each case, depending on the Company’s debt ratings.

The Company continues to evaluate its outstanding debt portfolio to take advantage of market conditions that would allow the Company to reduce its interest rate or financing risk and provide a lower long-term borrowing cost. The Company anticipates that it will refinance the $1,000.0 in debt coming due during 2024.

Under the Company's revolving credit facility, the Company is subject to negative covenants limiting subsidiary indebtedness and certain other covenants typical for investment grade-rated borrowers and the Company is required to maintain certain leverage ratios. The Company was in compliance with all covenants under the revolving credit facility at December 31, 2023, and expects that it will remain in compliance with its existing debt covenants for the next twelve months.

During 2023, the Company repurchased 4.8 shares of its Common Stock at an average price per share of $206.85 for a total cost of $1,000.0. The Company has accrued $9.0 of excise tax related to this accelerated share repurchase which will be paid in April 2024. At the end of 2023, the Company had outstanding authorization from the Board to purchase $530.4 of Company Common Stock. The repurchase authorization has no expiration date.

During the year ended December 31, 2022, the Company purchased 4.7 shares of its Common Stock at an average price per share of $233.48 per share for a total cost of $1,100.0. When the Company repurchases shares, the amount paid to repurchase the shares in excess of the par or stated value is allocated to additional paid-in-capital unless subject to limitation or the balance in additional paid-in-capital is exhausted. Remaining amounts are recognized as a reduction in retained earnings.

For the year ended December 31, 2023, the Company paid $254.0 in Common Stock dividends. On January 12, 2024, the Company announced a cash dividend of $0.72 per share of Common Stock for the first quarter, or approximately $61.5 in the aggregate. The dividend will be payable on March 13, 2024, to stockholders of record of all issued and outstanding shares of Common Stock as of the close of business on February 27, 2024. The declaration and payment of any future dividends will be at the discretion of the Company's board of directors.

Credit Ratings

The Company’s investment grade debt ratings from Moody’s and Standard & Poor's (S&P) contribute to its ability to access capital markets.

Off-Balance Sheet Arrangements

The Company does not have transactions or relationships with “special purpose” entities, and the Company does not have any off-balance sheet financing other than normal operating leases and letters of credit.

Other Commercial Commitments

As of December 31, 2023, the Company provided letters of credit aggregating approximately $91.3, primarily in connection with certain insurance programs which are renewed annually.

The contractual value of the noncontrolling interest put in the Company's Ontario subsidiary totaled $15.5 and $15.0 at December 31, 2023, and 2022, respectively, and has been classified as mezzanine equity in the Company's consolidated balance sheet.

Based on current and projected levels of cash flows from operations, coupled with availability under its revolving credit facility, the Company believes it has sufficient liquidity to meet both its anticipated short-term and long-term cash needs for the next 12 months and the reasonably foreseeable future; however, the Company continually reassesses its liquidity position in light of market conditions and other relevant factors.

Critical Accounting Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported periods.

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While the Company believes these estimates are reasonable and consistent, they are by their very nature estimates of amounts that will depend on future events. Accordingly, actual results could differ from these estimates. The Company’s Audit Committee periodically reviews the Company’s significant accounting policies. The Company’s critical accounting policies arise in conjunction with the following:

•Revenue recognition;

•Business combinations;

•Income taxes;

•Goodwill and indefinite-lived assets; and

•Legal contingencies.

Revenue Recognition

Dx

Within the Dx segment, a revenue transaction is initiated when Dx receives a requisition order to perform a diagnostic test. The information provided on the requisition form is used to determine the party that will be billed for the testing performed and the expected reimbursement. Dx recognizes revenue and satisfies its performance obligation for services rendered when the testing process is complete and the associated results are reported. The Dx segment also enters into lab management agreements which have monthly and non-testing based fees which are recognized each month as the services are provided. Revenues are distributed among four payer portfolios - clients, patients, Medicare and Medicaid and third party. Dx considers negotiated discounts and anticipated adjustments, including historical collection experience for the payer portfolio, when revenues are recorded.

The following are descriptions of the Dx payer portfolios:

Clients

Client payers represent the portion of Dx’s revenue related to physicians, hospitals, health systems, accountable care organizations, employers and other entities where payment is received exclusively from the entity ordering the testing service. Generally, client revenues are recorded on a fee-for-service basis at Dx’s client list price, less any negotiated discount. A portion of client billing is for laboratory management services, collection kits and other non-testing services or products. In these cases, revenue is recognized when services are rendered or delivered.

Patients

This portfolio includes revenue from uninsured patients and member cost-share for insured patients (e.g., coinsurance, deductibles and non-covered services). Uninsured patients are billed based upon Dx’s patient fee schedules, net of any discounts negotiated with physicians on behalf of their patients. Dx bills insured patients as directed by their health plan and after consideration of the fees and terms associated with an established health plan contract.

Medicare and Medicaid

This portfolio relates to fee-for-service revenue from traditional Medicare and Medicaid programs. Net revenue from these programs is based on the fee schedule established by the related government authority. In addition to contractual discounts, other adjustments including anticipated payer denials are considered when determining net revenue. Any remaining adjustments to revenue are recorded at the time of final collection and settlement. These adjustments are not material to Dx’s results of operations in any period presented.

Third Party

Third party includes revenue related to MCOs. The majority of Dx's third-party revenue is reimbursed on a fee-for-service basis. These payers are billed at Dx's established list price and revenue is recorded net of contractual discounts. The majority of Dx’s MCO revenues are recorded based upon contractually negotiated fee schedules with revenues for non-contracted MCOs recorded based on historical reimbursement experience.

Third-party reimbursement is also received through capitation agreements with MCOs and independent physician associations (IPAs). Under capitated agreements, revenue is recognized based on a negotiated per-member, per-month payment for an agreed upon menu of tests, or based upon the proportionate share earned by Dx from a capitation pool. When the agreed upon reimbursement is based solely on an established rate per member, revenue is not impacted by the volume of testing performed. Under a capitation pool arrangement, the aggregate value of an established rate per member is distributed based on the volume and complexity of the procedures performed by laboratories participating in the agreement. Dx recognizes revenue monthly, based upon the established capitation rate or anticipated distribution from a capitated pool.

Dx has a formal process to estimate implicit price concessions for uncollectable accounts. The majority of Dx's collection risk is related to accounts receivable from both insured and uninsured patients who are unwilling or unable to pay. Anticipated

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write-offs are recorded as adjustments to revenue at an amount considered necessary to record the segment's revenue at its net realizable value. In addition to contractual discounts, other adjustments including anticipated payer denials and other external factors that could affect the collectability of its receivables are considered when determining revenue and the net receivable amount. Any remaining adjustments to revenue are recorded at the time of final collection and settlement. These adjustments are not material to Dx's results of operations in any period presented.

BLS

BLS revenue is generally recognized over time, as the services are delivered to the customer, based on the extent of progress towards completion of the performance obligation. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the products or services to be provided. The majority of BLS's contracts contain a single performance obligation, as BLS provides a significant service of integrating all promises in the contract and the promises are highly interdependent and interrelated with one another. For contracts that include multiple performance obligations, BLS allocates the contract value to the goods and services based on a customer price list, if available. If a price list is not available, BLS will estimate the transaction price using either market prices or an “expected cost plus margin” approach. The total contract value is estimated at the beginning of the contract, and is equal to the amount expected to be billed to the customer. These contracts generally take the form of fixed-price or fee-for-service arrangements subject to pricing adjustments based on changes in scope.

Fixed-price contracts are typically recognized as revenue over time based on a proportional-performance basis, using either input or output methods that are specific to the service provided. In an output method, revenue is determined by dividing the actual units of output achieved by the total units of output required under the contract and multiplying that percentage by the total contract value. When using an input method, revenue is recognized by dividing the actual costs incurred by the total estimated cost expected to complete the contract, and multiplying that percentage by the total contract value. Contract costs principally include direct labor costs, research model costs and allocated overhead costs. The estimate of total costs expected to complete the contract requires significant judgment and these estimates are reviewed periodically. Any adjustments to these estimates are recognized on a cumulative catch-up basis in the period they become known.

Fee-for-service contracts are typically priced based on transaction volume or time and materials. For volume-based contracts the contract value is entirely variable and revenue is recognized as the specific product or service is completed. For services billed based on time and materials, revenue is recognized using the right to invoice practical expedient.

Contracts are often modified to account for changes in contract specifications and requirements. Generally, when contract modifications create new performance obligations, the modification is considered to be a separate contract and revenue is recognized prospectively. When contract modifications change existing performance obligations, the impact on the existing transaction price and measure of progress for the performance obligation to which it relates is generally recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis.

Most contracts are terminable with or without cause by the customer, either immediately or upon notice. These contracts often require payment to BLS of expenses incurred and fees earned to date and, in some cases, a termination fee or a payment to BLS of some portion of the fees or profits that could have been earned by BLS under the contract if it had not been terminated early. Termination fees are included in revenues when services have been performed and realization is assured.

BLS incurs sales commissions in the process of obtaining contracts with customers, which are recoverable through the service fees in the contract. Sales commissions that are payable upon contract award are recognized as assets and amortized over the expected contract term, along with related payroll tax expense. The amortization of commission expense is based on the weighted average contract duration for all commissionable awards in the respective business in which the commission expense is paid, which approximates the period over which goods and services are transferred to the customer. The amortization period of sales commissions ranges from approximately 1 to 5 years, depending on the business. For businesses that enter primarily short-term contracts, BLS applies the practical expedient which allows costs to obtain a contract to be expensed when incurred if the amortization period of the assets that would otherwise have been recognized is one year or less. Amortization of assets from sales commissions is included in selling, general, and administrative expense.

BLS incurs costs to fulfill contracts with customers, which are recoverable through the service fees in the contract. Contract fulfillment costs include software implementation costs and setup costs for certain services. These costs are recognized as assets and amortized over the expected term of the contract to which the implementation relates, which is the period over which services are expected to be provided to the customer. This period typically ranges from 2 to 5 years. Amortization of deferred contract fulfillment costs is included in cost of goods sold.

Business Combinations

The Company accounts for business combination transactions under the acquisition method of accounting and reported the results of operations of the acquired entities from its respective date of acquisition. Assets acquired were recorded at their

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estimated fair values as of the acquisition date. Estimated fair values were based on various valuation methodologies, including an income approach using primarily discounted cash flow techniques for the customer relationships intangible assets. The aforementioned income methods utilize management's estimates of future operating results and cash flows discounted using a weighted-average cost of capital that reflects market participant assumptions. The excess of the fair value of the consideration conveyed over the fair value of the assets acquired was recorded as goodwill. The goodwill reflects management's expectations of the ability to gain access to and penetrate the acquired entities' historical patient base and the benefits of being able to leverage operational efficiencies with favorable growth opportunities based on positive demographic trends in the market.

Income Taxes

The Company accounts for income taxes utilizing the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and for tax loss carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company does not recognize a tax benefit, unless the Company concludes that it is more likely than not that the benefit will be sustained on audit by the taxing authority based solely on the technical merits of the associated tax position. If the recognition threshold is met, the Company recognizes a tax benefit measured at the largest amount of the tax benefit that the Company believes is greater than 50% likely to be realized. The Company records interest and penalties in income tax expense.

Goodwill and Indefinite-Lived Assets

The Company assesses goodwill and indefinite-lived intangibles for impairment at least annually or whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. The annual impairment test for goodwill includes an option to perform a qualitative assessment of whether it is more likely than not that a reporting unit's fair value is less than its carrying value. Reporting units are businesses with discrete financial information that is available and reviewed by management. If the Company determines that it is more likely than not that the fair value of a reporting unit is less than its carrying value, then the Company performs the quantitative goodwill impairment test. The Company may also choose to bypass the qualitative assessment for any reporting unit in its goodwill assessment and proceed directly to performing the quantitative assessment. The Company recognizes an impairment charge for the amount by which the reporting unit's carrying amount exceeds its fair value.

In the qualitative assessment, the Company considers relevant events and circumstances for each reporting unit, including (i) current year results, (ii) financial performance versus management’s annual and five-year strategic plans, (iii) changes in the reporting unit carrying value since prior year, (iv) industry and market conditions in which the reporting unit operates, (v) macroeconomic conditions, including discount rate changes, and (vi) changes in products or services offered by the reporting unit. If applicable, performance in recent years is compared to forecasts included in prior quantitative valuations. Based on the results of the qualitative assessment, if the Company concludes that it is not more likely than not that the fair value of the reporting unit is less than its carrying values of the reporting unit, then no quantitative assessment is performed.

The quantitative assessment includes the estimation of the fair value of each reporting unit as compared to the carrying value of the reporting unit. The Company estimates the fair value of a reporting unit using both income-based and market-based valuation methods. The income-based approach is based on the reporting unit's forecasted future cash flows that are discounted to the present value using the reporting unit's weighted average cost of capital. For the market-based approach, the Company utilizes a number of factors such as publicly available information regarding the market capitalization of the Company as well as operating results, business plans, market multiples, and present value techniques. Based upon the range of estimated values developed from the income and market-based methods, the Company determines the estimated fair value for the reporting unit. If the estimated fair value of the reporting unit exceeds the carrying value, the goodwill is not impaired and no further review is required.

The income-based fair value methodology requires management's assumptions and judgments regarding economic conditions in the markets in which the Company operates and conditions in the capital markets, many of which are outside of management's control. At the reporting unit level, fair value estimation requires management's assumptions and judgments regarding the effects of overall economic conditions on the specific reporting unit, along with assessment of the reporting unit's strategies and forecasts of future cash flows. Forecasts of individual reporting unit cash flows involve management's estimates and assumptions regarding:

•Annual cash flows, on a debt-free basis, arising from future revenues and profitability, changes in working capital, capital spending and income taxes for at least a five-year forecast period.

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•A terminal growth rate for years beyond the forecast period. The terminal growth rate is selected based on consideration of growth rates used in the forecast period, historical performance of the reporting unit and economic conditions.

•A discount rate that reflects the risks inherent in realizing the forecasted cash flows. A discount rate considers the risk-free rate of return on long-term treasury securities, the risk premium associated with investing in equity securities of comparable companies, the beta obtained from the comparable companies and the cost of debt for investment grade issuers. In addition, the discount rate may consider any -specific risk in achieving the prospective financial information.

Under the market-based fair value methodology, judgment is required in evaluating market multiples and recent transactions. Management believes that the assumptions used for its impairment tests are representative of those that would be used by market participants performing similar valuations of the reporting units.

Management performed its annual goodwill and intangible asset impairment testing as of the beginning of the fourth quarter of 2023. The Company elected to perform the qualitative assessment for goodwill and intangible assets for the domestic Dx and clinical trials testing solutions (CTTS) BLS reporting units and a quantitative assessment for the early development (ED) BLS reporting unit and the Canadian reporting unit, which includes indefinite-lived assets consisting of acquired Canadian licenses. Based upon the results of the qualitative and quantitative assessments, the Company concluded that the fair values of its domestic Dx, CTTS and Canadian reporting units, as of October 1, 2023, were greater than the carrying values. However, due to lower demand in the ED reporting unit in late 2023 which the Company anticipates will continue into early 2024, there is an expectation of lower near term revenue and profitability. Therefore, the Company concluded that the fair value of the ED reporting unit was less than carrying value and recorded a goodwill impairment of $333.6 in the BLS segment.