TANG KEVIN 4

What Happened
Kevin Tang, a 10% owner of Boundless Bio (BOLD), made open‑market purchases totaling 91,585 shares between July 9 and July 13, 2026. Reported trades: 7 shares at $2.48 ($17), 43,367 shares at $2.43 ($105,382), and 48,211 shares at $2.42 ($116,671), for an aggregate reported cost of about $222,070. These were purchases (transaction code P), which are generally interpreted as insider buys rather than sales.

Key Details

• Transaction dates and reported prices: 2026-07-09 (7 @ $2.48), 2026-07-10 (43,367 @ $2.43), 2026-07-13 (48,211 @ $2.42). Reported totals use weighted-average prices.
• Aggregate shares bought: 91,585; aggregate reported value: ~$222,070.
• Footnotes: Purchases occurred across multiple trades at prices reported in ranges (roughly $2.35–$2.48). The filing says more granular price-by-trade info is available on request.
• Beneficial ownership: Related Tang-controlled entities report beneficial ownership of significant blocks (TCP, TCPI, TCP III, TCP IV total ~2,790,103 shares); Mr. Tang has a pecuniary interest in those holdings (see footnote F2).
• Filing: Report filed July 13, 2026 covering trades through July 13; no explicit late-filing notation in the record provided.

Context

• These are straightforward open‑market purchases (P = Purchase), not option exercises, gifts, or awards. Purchases by significant owners can be of interest to investors as a non‑sales insider transaction, but they do not by themselves explain motive.
• The filing discloses aggregated/wtd‑average prices and notes the buys occurred in multiple executions; the filer offers to provide per‑trade price breakdowns if requested.