TANG KEVIN 4

What Happened Kevin Tang, a reported 10% owner of Boundless Bio, purchased a total of 57,210 shares in open-market transactions between July 6 and July 8, 2026, for an aggregate cash outlay of about $141,864. The individual trades reported were:

• 27,062 shares on 2026-07-06 at a weighted-average price of $2.49 (≈ $67,384)
• 15,810 shares on 2026-07-07 at a weighted-average price of $2.48 (≈ $39,209)
• 14,338 shares on 2026-07-08 at a weighted-average price of $2.46 (≈ $35,271)

These were purchases (code P), which are generally viewed as a more direct signal of an insider adding to holdings versus routine dispositions.

Key Details

• Transaction dates and prices: July 6–8, 2026; weighted-average prices reported $2.46–$2.49 for the listed trades. Footnotes indicate transaction prices in the broader ranges $2.42–$2.50 across all purchases.
• Total shares acquired: 57,210; total reported cost: ≈ $141,864.
• Shares owned after the transaction: The filing does not list a single total for Mr. Tang’s direct holdings; footnote shows related entities beneficially own shares — Tang Capital Partners, LP: 618,407; Tang Capital Partners International, LP: 843,301; Tang Capital Partners III, Inc.: 618,403; Tang Capital Partners IV, Inc.: 618,407. Mr. Tang has a pecuniary interest in those entity holdings.
• Footnotes: F1–F4 note weighted-average prices and that purchases occurred in multiple transactions at prices ranging roughly $2.42–$2.50; the reporting person offers to provide detailed per-price quantities on request.
• Filing timeliness: Report filed 2026-07-08 for trades dated 2026-07-06 through 07-08; filing appears timely based on the dates shown.

Context

• Kevin Tang is reported as a 10% owner with beneficial interests held through investment entities (see footnote). This is institutional/ownership-related trading rather than an ordinary-rank employee sale.
• Purchases by insiders can be of interest to retail investors as they represent insiders adding capital, but they do not by themselves prove future company performance. The filing is purely transactional and contains no statement of intent or strategy.