Boundless Bio: 10% owner Kevin Tang bought 149,474 shares

What happened

• The filing says Kevin Tang, a 10% owner, purchased a total of 149,474 shares of Boundless Bio (BOLD) in open-market or private purchases (code P) on Oct 16, Oct 19 and Oct 20, 2026, paying a total of $349,593.
• The reported transactions were: 118,185 shares at $2.34 for $276,553 (Oct 16); 12,790 shares at $2.34 for $29,929 (Oct 19); 18,279 shares at $2.33 for $42,590 (Oct 19); and 220 shares at $2.37 for $521 (Oct 20).

Key details

• Transaction dates and prices: Oct 16, 2026 — 118,185 shares @ $2.34; Oct 19, 2026 — 12,790 shares @ $2.34 and 18,279 shares @ $2.33; Oct 20, 2026 — 220 shares @ $2.37.
• Shares owned after the transaction: Reporting persons beneficially own 2,990,109 shares in aggregate (see footnote F3 for entity breakdown and Mr. Tang’s pecuniary interest).
• Relevant footnotes from the filing:
  • F1: The reporting persons delivered to the issuer the full amount of the disgorgeable profit arising from the purchases, $1,723.10.
  • F2, F4–F6: The reported prices are weighted-average prices; the purchases occurred in multiple transactions with price ranges noted (examples: $2.31–$2.35, $2.32–$2.35, $2.33–$2.40).
  • F3: Details of beneficial ownership by Tang-controlled entities (TCP, TCPI, TCP III, TCP IV) and Mr. Tang’s relationship to those entities.
• The filing reports purchases (code P); it does not indicate option exercises, gifts, awards, or tax withholding.

Why it may matter

• The filing shows purchases by a 10% owner (a large holder rather than an executive).
• The filing does not show why the insider traded or why the company acted.