OmniAb (OABI) director Bertozzi exercises RSUs and receives new option, RSU grants

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

OmniAb director Carolyn R. Bertozzi reported equity-based compensation activity. She exercised 20,000 Restricted Stock Units into Common Stock, bringing her direct holdings to 113,308 shares. She also received grants of 40,000 stock options at an exercise price of $2.03 and 20,000 new RSUs, each unit representing one share of Common Stock. The RSUs and options vest in full on the earlier of the next annual stockholder meeting or the first anniversary of their grant date.

Insider Trade Summary

20,000 shares exercised/converted

Mixed 4 txns

Insider Bertozzi Carolyn R

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 — 0 shares (Direct, null); Stock Option (right to buy) — 40,000 shares (Direct, null); Common Stock — 113,308 shares (Direct, null)

Footnotes (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

RSUs exercised into Common Stock: 20,000 shares Shares held after transactions: 113,308 shares New stock options granted: 40,000 options +3 more

6 metrics

RSUs exercised into Common Stock 20,000 shares Exercise of Restricted Stock Units into Common Stock

Shares held after transactions 113,308 shares Direct Common Stock ownership following Form 4 transactions

New stock options granted 40,000 options Stock Option (right to buy) grant on June 17, 2026

Stock option exercise price $2.03 per share Conversion or exercise price for 40,000 stock options

Stock option expiration June 17, 2036 Expiration date of granted stock options

New RSUs granted 20,000 units Restricted Stock Unit grant relating to Common Stock

Key Terms

Restricted Stock Units, Stock Option (right to buy), conversion or exercise price, Common Stock

4 terms

Restricted Stock Units financial

"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..."

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 (right to buy) financial

"Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting..."

conversion or exercise price financial

"Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting..."

Common Stock financial

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

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/18/2026 - 04:33 PM Accepted by SEC EDGAR 06/18/2026 - 04:32 PM

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^*

Bertozzi Carolyn R

(Last)

(First)

(Middle)

5980 HORTON STREET, STE 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/17/2026		M		20,000⁽¹⁾	A	⁽²⁾	113,308	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽²⁾	06/17/2026		M			20,000	⁽¹⁾	⁽¹⁾	Common Stock	20,000	$0	0	D
Restricted Stock Units	⁽²⁾	06/17/2026		A		20,000		⁽³⁾	⁽³⁾	Common Stock	20,000	$0	20,000	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: Carolyn R Bertozzi	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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did OmniAb (OABI) director Carolyn R. Bertozzi report?

Carolyn R. Bertozzi reported equity compensation transactions, including the exercise of 20,000 Restricted Stock Units into Common Stock and new grants of 40,000 stock options and 20,000 RSUs, all relating to OmniAb, Inc. share-based director compensation.

How many OmniAb (OABI) shares does Carolyn R. Bertozzi hold after these Form 4 transactions?

After exercising 20,000 Restricted Stock Units into Common Stock, Carolyn R. Bertozzi directly holds 113,308 shares of OmniAb, Inc. Common Stock. This figure reflects her position following the reported June 17, 2026 compensation-related equity transactions.

What are the terms of Carolyn R. Bertozzi’s new OmniAb (OABI) stock options?

Bertozzi received 40,000 stock options with a conversion or exercise price of $2.03 per share, expiring on June 17, 2036. Each option relates to OmniAb Common Stock and is scheduled to vest in full based on specified time and meeting conditions.

How do Carolyn R. Bertozzi’s OmniAb (OABI) Restricted Stock Units vest?

Each Restricted Stock Unit represents a right to receive one OmniAb Common Share. The RSUs vest in full on the earlier of the company’s next annual stockholder meeting following the grant date or the first anniversary of the grant date, according to the Form 4 footnotes.

Were Carolyn R. Bertozzi’s OmniAb (OABI) Form 4 transactions open-market purchases or sales?

The Form 4 shows no open-market buys or sells. Reported transactions are derivative exercises and equity grants, including RSU vesting into 20,000 OmniAb Common Shares and compensation-related awards of stock options and RSUs, rather than discretionary market trades.