BOLD insider trades & Congress trades
Boundless Bio, Inc.: public insider filings and Congress disclosures, in one place.
Bourse has recorded 12 open-market insider transactions in Boundless Bio, Inc. (BOLD) (11 purchases with code P and 1 sales with code S), the most recent on November 5, 2026.
In the last 90 days: 11 purchases by 1 insider ($454K) and 1 sale by 1 ($54K).
Insider transactions
SEC Form 4, open-market purchases (P) and sales (S) only. Awards, option exercises and tax withholding are excluded. “After” shows the stock’s return over the month following the trade, where available.
| Date | Insider | Role | Type | Shares | Price | Value | After 1M |
|---|---|---|---|---|---|---|---|
| Nov 5, 2026 | Tang Kevin | Chief Executive Officer | Buy | 8,390 | $2.40 | $20K | – |
| Nov 4, 2026 | Tang Kevin | Chief Executive Officer | Buy | 517 | $2.40 | $1K | – |
| Nov 3, 2026 | Tang Kevin | Chief Executive Officer | Buy | 2,255 | $2.40 | $5K | – |
| Oct 27, 2026 | Tang Kevin | Chief Executive Officer | Buy | 10,707 | $2.40 | $26K | – |
| Oct 26, 2026 | Tang Kevin | Chief Executive Officer | Buy | 9,606 | $2.38 | $23K | – |
| Oct 23, 2026 | Tang Kevin | Chief Executive Officer | Buy | 6,234 | $2.38 | $15K | – |
| Oct 22, 2026 | Tang Kevin | Chief Executive Officer | Buy | 5,800 | $2.40 | $14K | – |
| Oct 20, 2026 | Tang Kevin | Chief Executive Officer | Buy | 220 | $2.37 | $521 | – |
| Oct 19, 2026 | Tang Kevin | Chief Executive Officer | Buy | 12,790 | $2.34 | $30K | – |
| Oct 19, 2026 | Tang Kevin | Chief Executive Officer | Buy | 18,279 | $2.33 | $43K | – |
| Oct 16, 2026 | Tang Kevin | Chief Executive Officer | Buy | 118,185 | $2.34 | $277K | – |
| Aug 26, 2026 | Tang Kevin | Chief Executive Officer | Sell | 18,300 | $2.97 | $54K | −0.1% |
Data as of November 8, 2026. Public filings only. A purchase or sale by a politician or an insider does not by itself imply any wrongdoing.
New to these filings? Read how to read a Form 4, how Congress trades are disclosed and what insider cluster buying means. Sources and limits are on the Methodology page.
See these filings as they land
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