SEC Form 4 · accession 0001772259-26-000005

BlossomHill Therapeutics, Inc. · BLSM

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — President and CEO · Director · 10% Owner

Period of report

Aug 6, 2026

Accepted (ET)

Aug 10, 2026 · 6:22 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0001839970

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2	Aug 10, 2026	C	1,600,682	—	A	1,600,682	I	By The Li and Cui Family Trust
Common Stock^F1,F2	Aug 10, 2026	C	113,435	—	A	1,714,117	I	By The Li and Cui Family Trust
Common Stock^F1,F3	Aug 10, 2026	C	124,779	—	A	124,779	I	By RongShan, LLC
Common Stock	holding	—	—		—	1,067,121	D
Common Stock	holding	—	—		—	1,067,121	I	By Spouse

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Employee Stock Option (Right to Buy)^F4	$16.00	Aug 6, 2026	A	676,205	A	—	Aug 5, 2036	Common Stock	676,205	676,205	D
Series Angel Preferred Stock^F1,F2	—	Aug 10, 2026	C	1,600,682	D	—	—	Common Stock	1,600,682	0	I
Series B Preferred Stock^F1,F2	—	Aug 10, 2026	C	113,435	D	—	—	Common Stock	113,435	0	I
Series B Preferred Stock^F1,F3	—	Aug 10, 2026	C	124,779	D	—	—	Common Stock	124,779	0	I

F1Each share of Series Angel Preferred Stock and Series B Preferred Stock (together, the "Preferred Stock") automatically converted into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date.
F2The shares are held in trust for the benefit of the Reporting Person and her spouse. The Reporting Person and her spouse are trustees of The Li and Cui Family Trust (the "Trust") and have voting and dispositive power over the securities held by the Trust.
F3The Reporting Person's spouse is the manager of RongShan, LLC. The Reporting Person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.
F41/4th of the shares subject to the option shall vest on August 6, 2027, and the balance of the shares shall vest in equal monthly installments over the following 36 months.