This is a routine initial ownership filing, not a trade. Monitor for any subsequent Form 4 filings that would indicate actual open-market buying or selling by the Tang entities. The disclosed stake (~4% of shares outstanding based on $56M market cap and ~$2.50 stock price) is notable but not immediately actionable without transaction context.
Price Chart
Executive Summary
Kevin Tang and Tang Capital Management LLC filed a Form 3 initial statement of beneficial ownership, disclosing 2,247,512 shares of Boundless Bio (BOLD) common stock held indirectly through affiliated funds. This is a routine initial ownership filing triggered by crossing a 5%+ threshold or becoming an insider, not a new purchase or sale.
Key Facts
- Form 3 filed by Kevin Tang and Tang Capital Management LLC on 2026-06-29 for period ending 2026-06-25
- Beneficial ownership of 2,247,512 shares of BOLD common stock
- Shares held indirectly through Tang Capital Partners, LP; Tang Capital Partners International, LP; Tang Capital Partners III, Inc.; and Tang Capital Partners IV, Inc.
- Kevin Tang is sole manager of Tang Capital Management, LLC (general partner of TCP and TCPI) and sole director/CEO of TCP III and TCP IV
- No new open-market purchase or sale — this is an initial ownership disclosure filing
Financial Impact
2,247,512 shares disclosed — no transaction amount specified as this is a statement of existing holdings, not a trade
Risk Factors
- No new capital commitment — this filing reflects existing holdings, not fresh buying
- Tang entities could reduce position without further Form 3 disclosure (only Form 4 required for changes)
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 3 Filing (Primary) | 0001178579-26-000007 |
| Document: 0001178579-26-000007-index.html | 0001178579-26-000007 |
| Document: 0001178579-26-000007.txt | 0001178579-26-000007 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 26, 2026 1d ago | 425 | $2.41 | awaiting T+20 | awaiting T+20 | $2.41 (+0.00%) |
Oct 26, 2026 1d ago | 425 | $2.41 | awaiting T+20 | awaiting T+20 | $2.41 (+0.00%) |
Oct 8, 2026 19d ago | S-4 | $2.53 | awaiting T+20 | awaiting T+20 | $2.41 (+4.74%) |
Aug 28, 2026 8w ago | 425 / 8-K | $2.81 $2.56 | ▼ −8.90% | ▼ −8.53% | $2.41 (−14.23%) |
Jul 8, 2026 15w ago | Insider Cluster | $2.51 $2.84 | ▲ +13.15% | ▲ +10.91% | $2.41 (−3.98%) |
Jul 6, 2026 16w ago | Insider Cluster | $2.50 $2.71 | ▲ +8.20% | ▲ +5.04% | $2.41 (−3.60%) |
Jun 29, 2026 17w ago | 3 | $2.50 $2.48 | ▼ −0.80% | ▲ +0.23% | $2.41 (−3.60%) |
May 8, 2026 24w ago | 8-K | $1.44 $1.42 | ▼ −1.39% | ▼ −1.41% | $2.41 (+67.36%) |
May 8, 2026 24w ago | Press Release | $1.44 $1.42 | ▲ +1.39% | ▲ +1.41% | $2.41 (−67.36%) |
Apr 17, 2026 27w ago | Press Release | $1.60 $1.42 | ▼ −11.25% | ▼ −15.45% | $2.41 (+50.63%) |
US Market Status
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