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BOLD US Equity

Boundless Bio, Inc.Health Care · Pharmaceutical Preparations · CIK 1782303 · FY ends Dec 31
$2.86
+0.03 (+1.06%)
USD · as of 2026-08-18 · marketstack
3 registered studies · 0 active

Studies where BOLD is the lead sponsor, as filed with ClinicalTrials.gov. Completion dates are the sponsor's own projected windows and are revised as a study runs. Active studies first, then completed and stopped — newest readout first within each.

3 interventional

Held by 5 tracked-famous managers (MILLENNIUM MANAGEMENT LLC, RENAISSANCE TECHNOLOGIES LLC, CITADEL ADVISORS LLC, JANE STREET GROUP, LLC, Qube Research & Technologies Ltd) · FINRA short interest 1.5 days to cover (settled 2026-07-31) · insider 90d: 6 buys / 0 sells · government filings 180d: none disclosed

StudyPhaseStatusInterventionsConditionsEnrollmentPrimary completionUpdated
Study of the Kinesin Oral Molecular Degrader BBI-940 in Subjects With Advanced or Metastatic Breast CancerNCT07408089Rate of dose limiting toxicities (DLTs) in each BBI-940 monotherapy dose escalation cohort.Non-randomized · Open-label · TreatmentPhase 1Terminatedsponsor's stated reason: The study was terminated primarily due to a business decision related to a corporate transaction and was not driven by any safety signal.Drug: BBI-940, FulvestrantBreast Cancer, Metastatic Breast Cancer, Advanced Breast Cancer82026-07-28actual2026-08-19
Study of the CHK1 Inhibitor BBI-355, an ecDNA-directed Therapy (ecDTx), and the RNR Inhibitor BBI-825, in Subjects With Tumors With Oncogene AmplificationsNCT05827614Frequency and severity of treatment emergent adverse events (TEAEs) of BBI-355 as a single agent and in combination with each of the following agents: erlotinib, futibatinib, or BBI-825Non-randomized · Open-label · TreatmentPhase 1Terminatedsponsor's stated reason: Decision was made to halt the study based on overall clinical experience and market considerations. This decision was not driven by any safety signal.Drug: BBI-355, Erlotinib, Futibatinib, BBI-825Triple Negative Breast Cancer (TNBC), High Grade Serous Ovarian Carcinoma, High Grade Endometrial Carcinoma, Anogenital Cancer, Head and Neck (HNSCC), Cutaneous Squamous Cell Carcinoma (CSCC), Cervical Squamous Cell Carcinoma, ER+ Breast Cancer, Leiomyosarcoma (LMS), Undifferentiated Pleomorphic Sarcoma (UPS), Pancreatic Cancer Metastatic, Small Cell Lung Cancer852026-03-17actual2026-08-19
Study of the RNR Inhibitor BBI-825 in Subjects With Tumors With Resistance Gene AmplificationsNCT06299761Frequency and severity of treatment emergent adverse events (TEAEs) of BBI-825Open-label · TreatmentPhase 1Terminatedsponsor's stated reason: Strategic decision made following an assessment of preliminary PK data from the Part 1 portion of the trial showing a lack of dose proportional exposure and the increasing complexity and associated development costs in this landscape.Drug: BBI-825Solid Tumor192025-06-25actual2026-06-08

Primary completion is the date the sponsor filed with the registry — their own projection, revised whenever they revise it, unless the row is marked actual.

Source: ClinicalTrials.gov, retrieved 2026-08-19