Form 4 for BLSM BlossomHill Therapeutics, Inc.

Accepted 2026-08-10 18:23:18 ET · period of report 2026-08-06 · accession 0001772233-26-000005 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
DMI	2026-08-10 18:23	2026-08-10	BLSM	Li Yishan	Executive COB, Dir, 10%	C - Cnv Deriv	—	+1.84M	124.8K	New	—
D	2026-08-10 18:23	2026-08-06	BLSM	Li Yishan	Executive COB, Dir, 10%	A - Grant	$0.00	+112.7K	112.7K	New	$0
DMI	2026-08-10 18:23	2026-08-10	BLSM	Li Yishan	Executive COB, Dir, 10%	C - Cnv Deriv	—	-1.84M	0	-100%	—

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-08-10	C	A	1,600,682	—	1,600,682	I By The Li and Cui Family Trust	—	—	(F1) Each 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. (F2) The shares are held in trust for the benefit of the Reporting Person and his spouse. The Reporting Person and his 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.
2	Common	Common Stock	2026-08-10	C	A	113,435	—	1,714,117	I By The Li and Cui Family Trust	—	—	(F1) Each 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. (F2) The shares are held in trust for the benefit of the Reporting Person and his spouse. The Reporting Person and his 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.
3	Common	Common Stock	2026-08-10	C	A	124,779	—	124,779	I By RongShan, LLC	—	—	(F1) Each 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. (F3) The Reporting Person is manager of RongShan, LLC and may be deemed to have voting and dispositive power over the securities held by 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.
4	Derivative	Employee Stock Option (Right to Buy)	2026-08-06	A	A	112,701	$0.00	112,701	D	$16.00 · — to 2036-08-05	112,701 Common Stock	(F4) 1/4th 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.
5	Derivative	Series Angel Preferred Stock	2026-08-10	C	D	1,600,682	—	0	I By The Li and Cui Family Trust	— · — to —	1,600,682 Common Stock	(F1) Each 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. (F1) Each 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. (F1) Each 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. (F1) Each 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. (F2) The shares are held in trust for the benefit of the Reporting Person and his spouse. The Reporting Person and his 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.
6	Derivative	Series B Preferred Stock	2026-08-10	C	D	113,435	—	0	I By The Li and Cui Family Trust	— · — to —	113,435 Common Stock	(F1) Each 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. (F1) Each 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. (F1) Each 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. (F1) Each 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. (F2) The shares are held in trust for the benefit of the Reporting Person and his spouse. The Reporting Person and his 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.
7	Derivative	Series B Preferred Stock	2026-08-10	C	D	124,779	—	0	I By RongShan, LLC	— · — to —	124,779 Common Stock	(F1) Each 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. (F1) Each 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. (F1) Each 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. (F1) Each 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. (F3) The Reporting Person is manager of RongShan, LLC and may be deemed to have voting and dispositive power over the securities held by 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.