Form 4 for OABI OmniAb, Inc.

Accepted 2026-04-21 16:06:46 ET · period of report 2026-04-21 · accession 0001982655-26-000005 · 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
D	2026-04-21 16:06	2026-04-21	OABI	Gotwals Philip J	Dir	M - OptEx	—	+13.3K	13.3K	New	—
D	2026-04-21 16:06	2026-04-21	OABI	Gotwals Philip J	Dir	M - OptEx	$0.00	-13.3K	46.7K	-22%	$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	2026-04-21	M	A	13,333	—	13,333	D	—	—	(F1) Represents the vesting of an RSU which occurs in three substantially equal annual installments, beginning April 21, 2026, subject to the Reporting Person's continued service to the Issuer through each such vesting date. (F2) Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.
2	Derivative	Restricted Stock Units	2026-04-21	M	D	13,333	$0.00	46,667	D	— · — to —	13,333 Common Stock	(F2) Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. (F1) Represents the vesting of an RSU which occurs in three substantially equal annual installments, beginning April 21, 2026, subject to the Reporting Person's continued service to the Issuer through each such vesting date. (F1) Represents the vesting of an RSU which occurs in three substantially equal annual installments, beginning April 21, 2026, subject to the Reporting Person's continued service to the Issuer through each such vesting date.