TANG KEVIN bought BOLD

October 22, 2026 · Form 4 insider transaction

TANG KEVIN bought 5,800 shares of Boundless Bio, Inc. at $2.40 per share, a transaction worth $13.9K. The trade was recorded as open-market purchase and disclosed on an SEC Form 4, filed 4 days after the transaction.

Direction
Acquired (buy-side)
Shares
5,800
Price
$2.40
Total value
$13.9K
InsiderTANG KEVIN
RoleOfficer, Director, 10% owner
SecurityCommon Stock
Transaction codeP: Open-market purchase
Transaction dateOctober 22, 2026
Filing dateOctober 26, 2026
Shares owned after2,995,909
OwnershipIndirect
10b5-1 planNo
AmendedNo

Footnotes

The prices reported are weighted-average prices. These shares were purchased in multiple transactions at prices ranging from $2.39 to $2.40. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the SEC staff, upon request, all information regarding the number of shares purchased at each price within the range set forth in Footnotes 1 and 3 through 4.; Tang Capital Partners, LP ("TCP") beneficially owns 691,177 shares, Tang Capital Partners International, LP ("TCPI") beneficially owns 950,804 shares, Tang Capital Partners III, Inc. ("TCP III") beneficially owns 691,170 shares, and Tang Capital Partners IV, Inc. ("TCP IV") beneficially owns 678,598 shares. Kevin Tang is the sole manager of Tang Capital Management, LLC, which is the general partner of TCP and TCPI. Kevin Tang is the sole director and Chief Executive Officer of TCP III and TCP IV, which are indirectly wholly owned by TCP. Mr. Tang has a pecuniary interest in the shares beneficially held by TCP, TCPI, TCP III and TCP IV.

View the original Form 4 on SEC EDGAR