[Form 4] OmniAb, Inc. Insider Trading Activity

Rhea-AI Filing Summary

OmniAb, Inc. (OABI) insider purchase reported by President, CEO and Director Matthew W. Foehr. On 08/26/2025 Mr. Foehr acquired 540,540 shares of common stock in a private placement at $1.85 per share, the closing price on 08/22/2025. After this transaction he beneficially owns 4,341,987 shares in total, which includes 5,211 shares purchased under the company ESPP on 05/30/2025. The Form 4 was filed by one reporting person and signed by an attorney-in-fact on Mr. Foehr's behalf.

Positive

• Material insider purchase: CEO/Director acquired 540,540 shares in a private placement.
• Purchase price aligned with market: Shares bought at $1.85, equal to the closing price on 08/22/2025.
• Increased insider ownership: Total beneficial ownership rose to 4,341,987 shares.

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: CEO/Director purchased shares privately, increasing insider stake materially, signalling management commitment.

The transaction shows the President and CEO acquiring 540,540 shares in a private placement at $1.85 per share, raising his total beneficial ownership to 4,341,987 shares. As both an officer and director, this purchase meaningfully increases insider skin-in-the-game and may align management and shareholder interests. The filing confirms the shares include a small prior ESPP purchase of 5,211 shares. The form was filed by a single reporting person and executed by an attorney-in-fact, which is routine for insiders.

Securities Analyst

TL;DR: Significant insider buy at the recent market close price; neutral-to-positive signal but no forward guidance provided.

The CEO acquired 540,540 shares via a private placement at $1.85, the issuer's closing price on 08/22/2025, increasing total beneficial ownership to 4,341,987 shares. The Form 4 discloses the transaction details and prior ESPP purchase. While insider purchases can be interpreted positively, the filing contains no information on financing source, dilution impact, or strategic rationale, so material business implications cannot be drawn from this form alone.

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^*

FOEHR MATTHEW W

(Last) (First) (Middle)

5980 HORTON STREET, STE 600

(Street)

EMERYVILLE CA 94608

(City) (State) (Zip)

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
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
08/26/2025

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

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

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

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	08/26/2025		A(1)		540,540	A	$1.85	4,341,987(2)	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

Explanation of Responses:

1. On August 26, 2025, the reporting person acquired 540,540 shares of common stock of OmniAb, Inc. in a private placement transaction pursuant to a Securities Purchase Agreement. The shares were purchased at a price of $1.85 per share, which represented the closing price of the issuer's common stock on August 22, 2025.

2. The total includes 5,211 shares acquired on May 30, 2025, through the Issuer's Employee Stock Purchase Plan (ESPP).

Remarks:

	By: /s/ Charles S. Berkman, Attorney-in-Fact for Matthew W. Foehr	08/26/2025
	** 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.

FAQ

What did OmniAb (OABI) insider Matthew W. Foehr purchase?

On 08/26/2025 Mr. Foehr acquired 540,540 shares of OmniAb common stock in a private placement at $1.85 per share.

How many shares does the reporting person own after the transaction?

Following the reported transaction Mr. Foehr beneficially owns 4,341,987 shares in total.

Does the Form 4 disclose any prior purchases?

Yes, the total includes 5,211 shares acquired through the Issuer's Employee Stock Purchase Plan on 05/30/2025.

What was the purchase price and how was it determined?

The private placement price was $1.85 per share, which the filing states represented the issuer's closing price on 08/22/2025.

Who filed and signed the Form 4 for Mr. Foehr?

The Form 4 was filed by one reporting person and the signature block shows it was signed by Charles S. Berkman, Attorney-in-Fact for Matthew W. Foehr on 08/26/2025.