OABI

SEC source: 0000899243-22-035062 · doc4.xml · derivative · entry 5

Boyce Sarah · CIK 0001629383 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,840

Underlying: Common Stock · 37,840 shares

Expires 2032-06-10

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F5 · derivative.exercise_date: The stock option fully vests on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders or (ii) on June 10, 2023.

SEC source: 0000899243-22-035062 · doc4.xml · derivative · entry 4

Boyce Sarah · CIK 0001629383 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,994

Underlying: Common Stock · 13,994 shares

Expires 2031-06-04

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035062 · doc4.xml · derivative · entry 3

Boyce Sarah · CIK 0001629383 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,565

Underlying: Common Stock · 10,565 shares

Expires 2030-06-10

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035062 · doc4.xml · derivative · entry 2

Boyce Sarah · CIK 0001629383 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,616

Underlying: Common Stock · 22,616 shares

Expires 2029-10-15

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035062 · doc4.xml · nonDerivative · entry 1

Boyce Sarah · CIK 0001629383 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,437

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: Includes 8,753 restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock and does not expire.

F3 · shares: Includes 14,512 earn-out shares subject to forfeiture provisions described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

SEC source: 0000899243-22-035053 · doc4.xml · derivative · entry 2

GUSTAFSON KURT A · CIK 0001462354 · EVP, Finance and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 348,760

Underlying: Common Stock · 348,760 shares

Expires 2032-04-08

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on October 8, 2022, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035053 · doc4.xml · nonDerivative · entry 1

GUSTAFSON KURT A · CIK 0001462354 · EVP, Finance and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 160,062

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: Includes 69,752 restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock and does not expire.

F3 · shares: Includes 72,872 earn-out shares subject to forfeiture provisions described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 10

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 298,311

Underlying: Common Stock · 298,311 shares

Expires 2032-05-05

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F8 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 5, 2022, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 9

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,233

Underlying: Common Stock · 56,233 shares

Expires 2031-02-03

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F7 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 3, 2021, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 8

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 142,168

Underlying: Common Stock · 142,168 shares

Expires 2030-02-13

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F6 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 13, 2020, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 7

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 146,325

Underlying: Common Stock · 146,325 shares

Expires 2029-02-11

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F5 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 11, 2019, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 6

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 86,790

Underlying: Common Stock · 86,790 shares

Expires 2028-03-02

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 5

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 104,231

Underlying: Common Stock · 104,231 shares

Expires 2027-02-24

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 4

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 111,038

Underlying: Common Stock · 111,038 shares

Expires 2026-02-11

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 3

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 172,768

Underlying: Common Stock · 172,768 shares

Expires 2025-02-10

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035050 · doc4.xml · derivative · entry 2

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 270,595

Underlying: Common Stock · 270,595 shares

Expires 2024-02-12

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035050 · doc4.xml · nonDerivative · entry 1

FOEHR MATTHEW W · CIK 0001237556 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,305,350

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: Includes 176,076 restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock and does not expire.

F3 · shares: Includes 264,760 earn-out shares subject to forfeiture provisions described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 12

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 107,506

Underlying: Common Stock · 107,506 shares

Expires 2031-02-03

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F7 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 3, 2021, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 11

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 260,646

Underlying: Common Stock · 260,646 shares

Expires 2030-02-13

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F6 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 13, 2020, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 10

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 250,843

Underlying: Common Stock · 250,843 shares

Expires 2029-02-11

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F5 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 11, 2019, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 9

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 177,194

Underlying: Common Stock · 177,194 shares

Expires 2028-03-02

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 8

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 186,843

Underlying: Common Stock · 186,843 shares

Expires 2027-02-24

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 7

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 232,136

Underlying: Common Stock · 232,136 shares

Expires 2026-02-11

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 6

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 232,971

Underlying: Common Stock · 232,971 shares

Expires 2025-02-10

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 5

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 400,808

Underlying: Common Stock · 400,808 shares

Expires 2024-02-12

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 4

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,362

Underlying: Common Stock · 61,362 shares

Expires 2023-06-03

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035061 · doc4.xml · derivative · entry 3

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 246,648

Underlying: Common Stock · 246,648 shares

Expires 2023-02-15

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035061 · doc4.xml · nonDerivative · entry 1

HIGGINS JOHN L · CIK 0001208906 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,176,521

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: Includes 183,384 restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock and does not expire.

F3 · shares: Includes 362,232 earn-out shares subject to forfeiture provisions described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

SEC source: 0000899243-22-035063 · doc4.xml · derivative · entry 9

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 175,477

Underlying: Common Stock · 175,477 shares

Expires 2032-05-05

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F8 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 5, 2022, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035063 · doc4.xml · derivative · entry 8

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,772

Underlying: Common Stock · 29,772 shares

Expires 2031-02-03

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F7 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 3, 2021, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035063 · doc4.xml · derivative · entry 7

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,716

Underlying: Common Stock · 73,716 shares

Expires 2030-02-13

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F6 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 13, 2020, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035063 · doc4.xml · derivative · entry 6

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,710

Underlying: Common Stock · 62,710 shares

Expires 2029-02-11

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F5 · derivative.exercise_date: The stock option vests and is exercisable as to 12.5% of the underlying shares on August 11, 2019, and in 42 substantially equal monthly installments thereafter.

SEC source: 0000899243-22-035063 · doc4.xml · derivative · entry 5

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,777

Underlying: Common Stock · 39,777 shares

Expires 2028-03-02

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035063 · doc4.xml · derivative · entry 4

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,237

Underlying: Common Stock · 29,237 shares

Expires 2027-02-24

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035063 · doc4.xml · derivative · entry 3

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,778

Underlying: Common Stock · 17,778 shares

Expires 2026-02-11

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035063 · doc4.xml · derivative · entry 2

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,339

Underlying: Common Stock · 8,339 shares

Expires 2025-02-10

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035063 · doc4.xml · nonDerivative · entry 1

Berkman Charles S · CIK 0001392266 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 353,716

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: Includes 97,769 restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock and does not expire.

F3 · shares: Includes 96,038 earn-out shares subject to forfeiture provisions described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 10

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,840

Underlying: Common Stock · 37,840 shares

Expires 2032-06-10

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F5 · derivative.exercise_date: The stock option fully vests on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders or (ii) on June 10, 2023.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 9

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,994

Underlying: Common Stock · 13,994 shares

Expires 2031-06-04

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 8

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,565

Underlying: Common Stock · 10,565 shares

Expires 2030-06-10

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 7

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,427

Underlying: Common Stock · 17,427 shares

Expires 2029-06-06

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 6

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,590

Underlying: Common Stock · 10,590 shares

Expires 2028-06-19

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 5

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,513

Underlying: Common Stock · 10,513 shares

Expires 2027-05-25

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 4

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,970

Underlying: Common Stock · 9,970 shares

Expires 2026-05-23

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 3

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,789

Underlying: Common Stock · 11,789 shares

Expires 2025-04-24

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035058 · doc4.xml · derivative · entry 2

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,178

Underlying: Common Stock · 14,178 shares

Expires 2024-06-04

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F4 · derivative.exercise_date: The stock option is fully vested and exercisable.

SEC source: 0000899243-22-035058 · doc4.xml · nonDerivative · entry 1

Patel Sunil · CIK 0001503062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 172,512

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: Includes 8,753 restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock and does not expire.

F3 · shares: Includes 22,538 earn-out shares subject to forfeiture provisions described in the Merger Agreement.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

SEC source: 0001846253-24-000011 · wk-form4a_1713908398.xml · nonDerivative · entry 1

Cochran Jennifer R. · CIK 0001872349 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,378

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: This amendment is being filed to correct a Form 4 filed on November 3, 2022, which inadvertently understated the number of shares beneficially held by the Reporting Person following the transaction reported by 292 shares. The number reported in column 4 represents the correct number of shares acquired by the Reporting Person as of November 1, 2022, which included (1) 12,545 restricted stock units and (2) 11,076 earn-out shares.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F3 · balance_after: Represents the number of shares beneficially held by the Reporting Person as of the date of this filing, as adjusted for the administrative error identified in footnote 2.

SEC source: 0001846253-24-000009 · wk-form4a_1713908240.xml · nonDerivative · entry 1

Boyce Sarah · CIK 0001629383 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,381

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: This amendment is being filed to correct a Form 4 filed on November 3, 2022, which inadvertently understated the number of shares beneficially held by the Reporting Person following the transaction reported by 2,191 shares. The number reported in column 4 represents the correct number of shares acquired by the Reporting Person as of November 1, 2022, which included (1) 8,753 restricted stock units and (2) 16,704 earn-out shares.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F3 · balance_after: Represents the number of shares beneficially held by the Reporting Person as of the date of this filing, as adjusted for the administrative error identified in footnote 2.

SEC source: 0001846253-24-000014 · wk-form4a_1713908655.xml · nonDerivative · entry 1

FOEHR MATTHEW W · CIK 0001237556 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,296,665

F1 · kind: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F2 · shares: This amendment is being filed to correct a Form 4 filed on November 3, 2022, which inadvertently understated the number of shares beneficially held by the Reporting Person following the transaction reported by 126,268 shares. The number reported in column 4 represents the correct number of shares acquired by the Reporting Person as of November 1, 2022, which included (1) 176,076 restricted stock units and (2) 391,030 earn-out shares.

F1 · price: Pursuant to the business combination of Avista Public Acquisition Corp. II and OmniAb, Inc. ("Legacy OmniAb"), as contemplated by an agreement and plan of merger, dated March 23, 2022 (the "Merger Agreement"), each share of common stock, option and award of restricted stock unit of Legacy OmniAb automatically converted into the right to receive securities of the Issuer with the same terms and conditions in accordance with an exchange ratio described in the Merger Agreement.

F3 · balance_after: Represents the number of shares beneficially held by the Reporting Person as of the date of this filing, as adjusted for the administrative error identified in footnote 2.