OmniAb (OABI) director receives options and RSUs, exercises 20,000 shares

Rhea-AI Filing Summary

OmniAb, Inc. director Steven C. Crouse reported equity compensation-related transactions with no share sales. He exercised derivative rights to acquire 20,000 shares of Common Stock, bringing his direct holdings to 33,333 shares. He also received 40,000 stock options at a $2.03 exercise price and 20,000 Restricted Stock Units, which vest based on the next annual stockholder meeting or the first anniversary of grant.

Insider Trade Summary

20,000 shares exercised/converted

Mixed 4 txns

Insider Crouse Steven C.

Role null

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	20,000	$0.00	--
Grant/Award	Restricted Stock Units	20,000	$0.00	--
Grant/Award	Stock Option (right to buy)	40,000	$0.00	--
Exercise	Common Stock	20,000	$0.00	--

Holdings After Transaction: Restricted Stock Units — 26,667 shares (Direct, null); Stock Option (right to buy) — 40,000 shares (Direct, null); Common Stock — 33,333 shares (Direct, null)

Footnotes (1)

1. Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs shall vest in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date. Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant.

Key Figures

Shares acquired via exercise: 20,000 shares Common shares held after: 33,333 shares New stock options granted: 40,000 options at $2.03 +3 more

6 metrics

Shares acquired via exercise 20,000 shares Common Stock acquired through derivative exercise on June 17, 2026

Common shares held after 33,333 shares Direct Common Stock holdings following transactions

New stock options granted 40,000 options at $2.03 Stock Option grant with $2.03 exercise price, expiring June 17, 2036

RSUs granted 20,000 RSUs Restricted Stock Units granted on June 17, 2026

RSUs vested 20,000 RSUs RSU vesting tied to June 17, 2025 grant conditions

RSUs held after 26,667 RSUs Total Restricted Stock Units following derivative RSU exercise

Key Terms

Restricted Stock Units, Stock Option, exercise or conversion of derivative security, grant, award, or other acquisition, +1 more

5 terms

Restricted Stock Units financial

"Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Stock Option financial

"Each Stock Option shall vest and become exercisable in full on the earlier of"

A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.

exercise or conversion of derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security""

grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

contingent right to receive one share financial

"Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share"

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Crouse Steven C.

(Last) (First) (Middle)

5980 HORTON STREET

SUITE 600

(Street)

EMERYVILLE CALIFORNIA 94608

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
OmniAb, Inc. [ OABI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/17/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/17/2026		M		20,000(1)	A	(2)	33,333	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(2)	06/17/2026		M			20,000	(1)	(1)	Common Stock	20,000	$0	26,667	D
Restricted Stock Units	(2)	06/17/2026		A		20,000		(3)	(3)	Common Stock	20,000	$0	46,667	D
Stock Option (right to buy)	$2.03	06/17/2026		A		40,000		(4)	06/17/2036	Common Stock	40,000	$0	40,000	D

Explanation of Responses:

1. Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

2. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

3. The RSUs shall vest in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

4. Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant.

Remarks:

	By: /s/ Charles S. Berkman, Attorney-in-Fact For: Steven C. Crouse	06/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did OmniAb (OABI) director Steven C. Crouse report?

Steven C. Crouse reported equity awards and an option-related share acquisition. He exercised derivative rights to acquire 20,000 Common Stock shares and received 40,000 stock options plus 20,000 Restricted Stock Units as part of his compensation.

Did Steven C. Crouse sell any OmniAb (OABI) shares in this Form 4?

No, the Form 4 shows no share sales by Steven C. Crouse. All reported transactions are acquisitions through an option exercise and new grants of stock options and Restricted Stock Units, indicating compensation-related awards rather than open-market selling.

How many OmniAb (OABI) common shares does Steven C. Crouse hold after these transactions?

After the reported transactions, Crouse directly holds 33,333 Common Stock shares. This total reflects the addition of 20,000 shares acquired through exercising derivative rights, as disclosed in the Form 4 transaction details.

What are the terms of Steven C. Crouse’s new OmniAb (OABI) stock options?

Crouse received 40,000 stock options with a $2.03 exercise price. Each option is a right to buy OmniAb Common Stock and vests in full on the earlier of the next annual stockholder meeting or the first anniversary of the grant date.

How do OmniAb (OABI) Restricted Stock Units reported for Steven C. Crouse vest?

The Restricted Stock Units vest based on time and the stockholder meeting schedule. The filing states they vest in full on the earlier of the next annual stockholders’ meeting following the grant date or the first anniversary of the grant date.