Boundless Bio, Inc. — Director's Dealing 2025

Jun 23, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Boundless Bio, Inc. (BOLD)
CIK: 0001782303
Period of Report: 2025-06-23

Reporting Person: Christensen James (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-06-23	Stock Option (right to buy)	$1.03	A	16000	Acquired	2035-06-22	Common Stock (16000)	Direct

Footnotes

F1: The stock option shall vest in substantially equal monthly installments over the 12 months following June 23, 2025 (or, in the event the next annual meeting of the issuer's stockholders occurs prior to June 23, 2026, any remaining unvested portion of the stock option will vest on the date of such annual meeting), subject to the reporting person's continuing service on the issuer's board of directors through such vesting date.