Form 4 for BBOT BridgeBio Oncology Therapeutics, Inc.

Accepted 2026-09-14 16:24:02 ET · period of report 2026-09-10 · accession 0001193125-26-390624 · 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
D	2026-09-14 16:24	2026-09-10	BBOT	Cobo Marc	Principal Accounting Off	A - Grant	$0.00	+9,038	14.3K	+170%	$0
D	2026-09-14 16:24	2026-09-10	BBOT	Cobo Marc	Principal Accounting Off	F - Tax	$5.52	-203	14.1K	-1%	-$1,121
D	2026-09-14 16:24	2026-09-10	BBOT	Cobo Marc	Principal Accounting Off	A - Grant	$0.00	+43.7K	43.7K	New	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-09-10	A	A	9,038	$0.00	14,344	D	—	—	(F1) Represents a grant of restricted stock units ("RSUs"), each representing a contingent right to receive one share of the Issuer's Common Stock. The RSUs vest in 16 equal quarterly installments over a period of four years from April 21, 2026, subject to the Reporting Person's continuous service to the Issuer on each such date. The RSUs will be settled in shares of Common Stock upon vesting.
2	Common	Common Stock	2026-09-10	F	D	203	$5.52	14,141	D	—	—	(F2) Represents the number of shares of the Issuer's Common Stock withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of RSUs.
3	Derivative	Stock Option (Right to Buy)	2026-09-10	A	A	43,700	$0.00	43,700	D	$5.52 · — to 2036-09-09	43,700 Common Stock	(F3) 1/48th of the shares subject to such option vest and become exercisable in substantially equal monthly installments on each monthly anniversary of April 21, 2026, subject to the Reporting Person's continuous service to the Issuer on each such date.