Boundless Bio Inc. (BOLD)
Company Description
Boundless Bio, Inc., a clinical-stage oncology company, develops cancer therapeutics to address the unmet need of patients with oncogene amplified tumors by targeting extrachromosomal DNA.
Its lead product candidate is BBI-355, an oral inhibitor of checkpoint kinase 1 that is in Phase 1/2 clinical trial in patients with oncogene amplified cancers.
The company is also developing BBI-825, an oral inhibitor of ribonucleotide reductase, which is in Phase 1/2 clinical trial in cancer patients with resistance gene amplifications; and ecDTx 3 program targeting a kinesin involved with the cellular mechanism for segregation of ecDNA.
Boundless Bio, Inc. was formerly known as Pretzel Therapeutics, Inc. and changed its name to Boundless Bio, Inc. in July 2019.
The company was incorporated in 2018 and is headquartered in San Diego, California.

Country | United States |
IPO Date | Jul 20, 2016 |
Industry | Biotechnology |
Sector | Healthcare |
Employees | 64 |
CEO | Zachary Hornby |
Contact Details
Address: 9880 Campus Point Drive San Diego, California United States | |
Website | https://boundlessbio.com |
Stock Details
Ticker Symbol | BOLD |
Exchange | NASDAQ |
Fiscal Year | n/a |
Reporting Currency | USD |
CIK Code | 0001782303 |
CUSIP Number | 10170A100 |
ISIN Number | US10170A1007 |
Employer ID | 83-0751369 |
SIC Code | 2834 |
Key Executives
Name | Position |
---|---|
Zachary Hornby | Chief Executive Officer, President & Director |
Jessica Oien J.D. | Chief Legal Officer & Corporate Secretary |
Amy Berkley Ph.D. | Senior Vice President of Program Team |
Anthony Pinkerton Ph.D. | Senior Vice President of Drug Discovery |
David Hinkle | Senior Vice President of Finance, Controller & Corporate Treasurer |
Dr. Christian Hassig Ph.D. | Chief Scientific Officer |
Dr. James L. Freddo M.D. | Interim Chief Medical Officer |
Dr. Peter Krein Ph.D. | Senior Vice President of Precision Medicine |
Meredith Wesley | Senior Vice President of Talent & Culture |
Sara Weymer | Senior Vice President of Clinical Operations |
Latest SEC Filings
Date | Type | Title |
---|---|---|
May 23, 2025 | 8-K | Current Report |
May 09, 2025 | 10-Q | Quarterly Report |
May 09, 2025 | 8-K | Current Report |
Apr 29, 2025 | ARS | Filing |
Apr 29, 2025 | DEFA14A | Filing |
Apr 29, 2025 | DEF 14A | Filing |
Apr 01, 2025 | 8-K | Current Report |
Apr 01, 2025 | S-3 | Filing |
Mar 27, 2025 | 10-K | Annual Report |
Mar 27, 2025 | 8-K | Current Report |