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Boundless Bio, Inc.

BOLD
Healthcare|Biotechnology|US
$2.46
+0.05 (+2.07%)
Tangible Book / Share
$2.94
Cash / Share
$3.24

About

Boundless Bio, Inc., a clinical-stage oncology company, focuses on developing innovative cancer therapies aimed at addressing the significant unmet needs of patients with oncogene amplified tumors. Their core strategy involves targeting extrachromosomal DNA (ecDNA). The company's lead product candidate, BBI-355, an orally administered inhibitor of checkpoint kinase 1 (CHK1), is currently in Phase 1/2 clinical trials for patients suffering from oncogene amplified cancers. Additionally, Boundless Bio is advancing BBI-825, another oral inhibitor, this one targeting ribonucleotide reductase (RNR), also in Phase 1/2 clinical development for cancer patients exhibiting resistance gene amplifications. A third initiative, the ecDTx 3 program, is designed to target a kinesin crucial for the cellular segregation mechanism of ecDNA. Incorporated in 2018, the company originally operated as Pretzel Therapeutics, Inc. before adopting the name Boundless Bio, Inc. in July 2019. Its headquarters are situated in San Diego, California.

Stock Price

+95.2%(1Y)
1M
-4.7%
3M
-14.9%
6M
+70.8%
YTD
+105.0%
1Y
+103.3%
3Y
-82.7%
5Y
-82.7%

Pipeline Summary

3 total trials
3
Phase 1
0
Phase 2
0
Phase 3
0
Phase 4
Terminated: 3

Key Facts

Market Cap$56.0M
Employees28 (-56% YoY)
CEOZachary Hornby
IPO DateMar 28, 2024
Beta0.38
52-Week Range$0.961 – $3.164
Avg Volume175,256
ExchangeNASDAQ

Ownership

Float76.9%
Shares Outstanding22.7M

Recent Insider Trades

TANG KEVINBUY
Nov 5, 20268,390 shares @ $2.40
TANG KEVINBUY
Nov 4, 2026517 shares @ $2.40
TANG KEVINBUY
Nov 3, 20262,255 shares @ $2.40
TANG KEVINBUY
Oct 27, 202610,707 shares @ $2.40
TANG KEVINBUY
Oct 26, 20269,606 shares @ $2.38

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Data last updated: Nov 9, 2026, 04:00 AM