Director at OmniAb (NASDAQ: OABI) gains 13,333 shares via RSU vesting

Rhea-AI Filing Summary

OmniAb, Inc. director Philip J. Gotwals reported an exercise of restricted stock units into common shares. On April 21, 2026, 13,333 Restricted Stock Units converted into 13,333 shares of Common Stock at a stated price of $0.0000 per share.

Following the transaction, he directly holds 13,333 shares of Common Stock and 46,667 Restricted Stock Units. The RSUs vest in three substantially equal annual installments beginning April 21, 2026, subject to his continued service with OmniAb through each vesting date.

Insider Trade Summary

13,333 shares exercised/converted

Mixed 2 txns

Insider Gotwals Philip J

Role null

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	13,333	$0.00	--
Exercise	Common Stock	13,333	$0.00	--

Holdings After Transaction: Restricted Stock Units — 46,667 shares (Direct, null); Common Stock — 13,333 shares (Direct, null)

Footnotes (1)

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

Key Figures

Common shares acquired: 13,333 shares RSUs converted: 13,333 units RSUs held after: 46,667 units +2 more

5 metrics

Common shares acquired 13,333 shares Common Stock received on April 21, 2026 from RSU conversion

RSUs converted 13,333 units Restricted Stock Units that converted into common stock

RSUs held after 46,667 units Restricted Stock Units remaining after the reported transaction

Stated price per share $0.0000 per share Conversion price for RSUs into common stock

RSU vesting start date April 21, 2026 First of three substantially equal annual vesting installments

Key Terms

Restricted Stock Unit, contingent right, derivative security, vesting

4 terms

Restricted Stock Unit financial

"Represents the vesting of an RSU which occurs in three substantially equal annual installments"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

contingent right financial

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

derivative security financial

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

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

vesting financial

"Represents the vesting of an RSU which occurs in three substantially equal annual installments"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

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^*

Gotwals Philip J

(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)
04/21/2026

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	04/21/2026		M		13,333(1)	A	(2)	13,333	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)	04/21/2026		M			13,333	(1)	(1)	Common Stock	13,333	$0	46,667	D

Explanation of Responses:

1. 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.

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

Remarks:

	By: /s/ Charles S. Berkman, Attorney-in-Fact For: Philip J. Gotwals	04/21/2026
	** 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 transaction did OmniAb (OABI) director Philip Gotwals report?

Philip J. Gotwals reported the conversion of Restricted Stock Units into common stock. On April 21, 2026, 13,333 RSUs converted into 13,333 shares of OmniAb common stock at a stated price of $0.0000 per share, increasing his direct share ownership.

How many OmniAb (OABI) shares does Philip Gotwals hold after this Form 4?

After the reported transactions, Philip Gotwals directly holds 13,333 shares of OmniAb common stock. In addition, he holds 46,667 Restricted Stock Units, which represent rights to receive more shares of common stock as they vest over time.

What are Restricted Stock Units (RSUs) in the OmniAb (OABI) Form 4 filing?

In this filing, each Restricted Stock Unit represents a contingent right to receive one share of OmniAb common stock. RSUs are a form of equity compensation that convert into actual shares as they vest according to the company’s vesting schedule and service conditions.

What is the vesting schedule for Philip Gotwals’ OmniAb (OABI) RSUs?

The RSUs vest in three substantially equal annual installments beginning April 21, 2026. Vesting is conditioned on Philip Gotwals’ continued service to OmniAb through each vesting date, meaning unvested units could be forfeited if service ends earlier.

Did the OmniAb (OABI) director buy or sell shares on the market in this Form 4?

The reported activity reflects an exercise or conversion of derivative securities, not an open-market purchase or sale. RSUs converted into 13,333 common shares at a stated price of $0.0000, consistent with equity compensation vesting rather than a market trade.