Boundless Bio, Inc., a clinical-stage oncology company, develops interrogating extrachromosomal DNA (ecDNA) directed therapies for treating patients with oncogene amplified cancers. Its lead product candidate is BBI-940, an ecDNA-directed therapeutic candidate (ecDTx) that is in Phase 1/2 clinical trial in patients with estrogen receptor positive and human epidermal growth factor receptor 2 negative breast cancer, as well as patients with triple-negative breast cancer luminal androgen receptor subtype. The company was formerly known as Pretzel Therapeutics, Inc. and changed its name to Boundless Bio, Inc. in July 2019. Boundless Bio, Inc. was incorporated in 2018 and is headquartered in San Diego, California. Show more

10955 Alexandria Way, San Diego, CA, 92121, United States

Biotechnology

Healthcare

Market Cap

24.85M

52 Wk Range

$0.96 - $1.78

Previous Close

$1.11

Open

$1.12

Volume

57,486

Day Range

$1.12 - $1.14

Enterprise Value

-42.78M

Cash

117.6M

Avg Qtr Burn

-10.2M

Insider Ownership

11.38%

Institutional Own.

51.21%

Qtr Updated

09/30/25

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Drug & Indication	Stage & Event	Catalyst Date
BBI-940 Details Indication unknown (ecDNA segregation and inheritance)	Phase 1/2 Data readout	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
BBI-355 + BBI-825 Details Locally advanced or metastatic solid tumors with oncogene amplifications	Failed Discontinued	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.