Boundless Bio Inc
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Why is BOLD moving today?
Boundless Bio Inc is a clinical-stage oncology company. It is focused on developing cancer therapeutics that address the unmet need in patients with oncogene-amplified tumors by targeting extrachromosomal DNA (ecDNA), a root cause of oncogene amplification observed in cancer patients. Using its proprietary Spyglass platform, the company identifies targets essential for ecDNA functionality, then designs and develops small-molecule drugs called ecDNA-directed therapies (ecDTx) to inhibit those targets. Its main ecDTx candidate under development, BBI-940, is a novel, oral, selective degrader that has demonstrated potent anti-tumor activity across a range of cancer cell lines and mouse xenograft models, including single-agent tumor regressions.
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Warehouse intelligence for BOLD.
BOLD insider activity
Boundless Bio Inc
3 insiders bought in the last 90 days
Net buying: $222K across loaded Form 4 rows.
Loaded official disclosures do not show all three sources aligned on this ticker.
| Filing date | Trade date | Insider | Title | Type | Price | Qty | Owned | Value | Receipt |
|---|---|---|---|---|---|---|---|---|---|
| 2026-07-06 | 2026-07-01 | ARCH Venture Fund IX, L.P. | Insider | sell | $2.49 | 16,000 | Not reported | $40K | SEC Form 4 |
| 2026-07-06 | 2026-07-01 | ARCH Venture Fund IX, L.P. | Insider | buy | $1.03 | 16,000 | 16,000 | $16K | SEC Form 4 |
| 2026-07-06 | 2026-07-01 | CRANDELL KEITH | Insider | sell | $2.49 | 16,000 | Not reported | $40K | SEC Form 4 |
| 2026-07-06 | 2026-07-01 | CRANDELL KEITH | Insider | buy | $1.03 | 16,000 | 16,000 | $16K | SEC Form 4 |
| 2026-07-02 | 2026-07-02 | TANG KEVIN | Insider | buy | $2.49 | 9,821 | 2,641,308 | $24K | SEC Form 4 |
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