Boundless Bio (BOLD) 10% Owner Kevin Tang Buys Shares

What Happened
Kevin Tang, a 10% owner of Boundless Bio, purchased a total of 4,863 shares (open-market/private purchases, code P) at an average price of $2.44 per share for an aggregate cost of about $11,866. The purchases were made in three tranches: 265 shares on July 17, 1,623 shares on July 20, and 2,975 shares on July 21, 2026. These were outright purchases (not sales or option exercises), which are recorded as acquisitions.

Key Details

• Transaction dates & prices: July 17 (265 sh @ $2.44 = $647), July 20 (1,623 sh @ $2.44 = $3,960), July 21 (2,975 sh @ $2.44 = $7,259). Reported price is a weighted-average; all shares were purchased at $2.44 (Footnote F1).
• Shares owned after transaction: Entities controlled by Mr. Tang (Tang Capital Partners, Tang Capital Partners International, Tang Capital Partners III, Tang Capital Partners IV) beneficially own 2,858,935 shares per the filing (Footnote F2). The 4,863 shares reported here were acquired in addition to those holdings.
• Footnotes: F1 notes weighted-average pricing and availability of per-price breakdown on request. F2 explains Mr. Tang’s control/pecuniary interest in the listed affiliated entities that hold the bulk of the shares.
• Timeliness: Form 4 filed July 21, 2026; the filing covers purchases dated July 17–21 and was filed the same day as the last reported purchase. No late-filing notation was indicated in the provided data.

Context
These are modest open-market purchases (total ~ $11.9k) by a 10% owner and reflect small-scale insider buying. Purchases by insiders can be informative to investors, but given the size relative to the institutional holdings listed, they do not by themselves indicate a major change in ownership or strategy.