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OmniAb (OABI) CEO Foehr logs RSU vesting and mandated tax sell-to-cover

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

OmniAb, Inc. President and CEO Matthew W. Foehr reported routine equity compensation activity. On April 7, 2026, 36,459 Restricted Stock Units vested and were converted into the same number of OmniAb common shares at no exercise price. To satisfy tax withholding obligations tied to this vesting, 19,244 shares of common stock were sold in mandated “sell-to-cover” transactions at a weighted average price of $1.49 per share, rather than at Foehr’s discretion. Following these transactions, Foehr directly holds 4,420,492 shares of OmniAb common stock and 309,376 RSUs, indicating that the sale represents a small portion of his overall equity position.

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Insider FOEHR MATTHEW W
Role President and CEO
Sold 19,244 shs ($29K)
Type Security Shares Price Value
Exercise Restricted Stock Units 36,459 $0.00 --
Exercise Common Stock 36,459 $0.00 --
Sale Common Stock 19,244 $1.49 $29K
Holdings After Transaction: Restricted Stock Units — 309,376 shares (Direct); Common Stock — 4,439,736 shares (Direct)
Footnotes (1)
  1. Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on April 7, 2024. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.46 to $1.53. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
RSUs vested 36,459 RSUs Vesting and conversion to common stock on April 7, 2026
Tax-related shares sold 19,244 shares Sell-to-cover sale to satisfy tax withholding
Sale price $1.49 per share Weighted average sale price; range $1.46–$1.53
Common shares after transactions 4,420,492 shares Direct OmniAb common stock holdings post-transaction
RSU holdings after vesting 309,376 RSUs Remaining Restricted Stock Units following April 7, 2026 vesting
Restricted Stock Units financial
"Represents the vesting of an RSU grant which occurs in three substantially equal annual installments"
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.
sell-to-cover financial
"tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades"
Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.
weighted average price financial
"The price reported in Column 4 is a weighted average price"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
equity incentive plans financial
"mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation"
Equity incentive plans are company programs that pay employees, executives, or directors with company stock, stock options, or share units instead of or in addition to cash, aiming to align their interests with shareholders—like giving team members a stake in the house they help build. For investors this matters because such plans can motivate better company performance but also dilute existing ownership and increase reported compensation costs, so they affect future earnings, voting power, and share value.
SEC Form 4
FORM 4UNITED 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 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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
President and CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/07/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock04/07/2026M36,459(1)A$0(2)4,439,736D
Common Stock04/07/2026S19,244(3)D$1.49(4)4,420,492D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(2)04/07/2026M36,459 (1) (1)Common Stock36,459$0309,376D
Explanation of Responses:
1. Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on April 7, 2024.
2. Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.
3. Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.46 to $1.53. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Remarks:
By: /s/ Charles S. Berkman, Attorney-in-Fact for Matthew W. Foehr04/07/2026
** Signature of Reporting PersonDate
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 did OmniAb (OABI) CEO Matthew Foehr report in this Form 4 filing?

Matthew Foehr reported vesting of 36,459 RSUs that converted into common stock and a related sell-to-cover sale of 19,244 shares for tax withholding. These transactions reflect routine equity compensation and tax handling rather than discretionary trading activity.

How many OmniAb (OABI) Restricted Stock Units vested for CEO Matthew Foehr?

A total of 36,459 Restricted Stock Units vested for Matthew Foehr on April 7, 2026. Each RSU represents a contingent right to receive one share of OmniAb common stock, so the vesting generated 36,459 new common shares for him at no exercise price.

Why did OmniAb (OABI) CEO Matthew Foehr sell 19,244 shares of common stock?

The 19,244 shares were sold to cover tax withholding obligations from the RSU vesting, under OmniAb’s equity incentive plan “sell-to-cover” requirement. The filing states these sales were mandated to fund taxes and did not represent discretionary trades by Foehr.

What price did OmniAb (OABI) shares sell for in Matthew Foehr’s tax sale?

The tax-related sale was executed at a weighted average price of $1.49 per share. The filing notes shares were sold in multiple transactions at prices ranging from $1.46 to $1.53, with detailed breakdowns available to interested parties upon request.

How many OmniAb (OABI) shares does CEO Matthew Foehr hold after these transactions?

After the RSU vesting and tax-related share sale, Matthew Foehr directly owns 4,420,492 shares of OmniAb common stock. He also holds 309,376 RSUs following the vesting event, indicating he maintains a substantial ongoing equity stake in the company.

Is Matthew Foehr’s OmniAb (OABI) Form 4 transaction discretionary or routine?

The Form 4 describes a routine compensation event. RSUs vested and converted into common stock, while 19,244 shares were sold solely to satisfy tax withholding under a mandated “sell-to-cover” mechanism, meaning the sale was not a discretionary market trade by Foehr.