Joint Filer Information ------------------------- Name of Joint Filer: Avista Acquisition LP II Address of Joint Filer: 65 East 55th Street, 18th Floor New York, NY 10022 Relationship of Joint Filer to Issuer: 10% Owner, Director Issuer Name and Ticker or Trading Symbol: OmniAb,Inc. [OABI] Date of Earliest Transaction Required to be Reported (Month/Day/Year): December 1, 2022 Designated Filer: Avista Acquisition GP LLC II Signature: AVISTA ACQUISITION LP II /s/ Benjamin Silbert ------------------------------------------- Name: Benjamin Silbert Title: Attorney-in-fact Dated: December 5, 2022 Joint Filer Information ------------------------- (continued) Name of Joint Filer: Avista Acquisition GP LLC II Address of Joint Filer: 65 East 55th Street, 18th Floor New York, NY 10022 Relationship of Joint Filer to Issuer: 10% Owner, Director Issuer Name and Ticker or Trading Symbol: OmniAb,Inc. [OABI] Date of Earliest Transaction Required to be Reported (Month/Day/Year): December 1, 2022 Designated Filer: Avista Acquisition GP LLC II Signature: AVISTA ACQUISITION GP LLC II /s/ Benjamin Silbert ------------------------------------------- Name: Benjamin Silbert Title: Attorney-in-fact Dated: December 5, 2022 Joint Filer Information ------------------------- (continued) Name of Joint Filer: Thompson Dean Address of Joint Filer: 65 East 55th Street, 18th Floor New York, NY 10022 Relationship of Joint Filer to Issuer: 10% Owner, Director Issuer Name and Ticker or Trading Symbol: OmniAb,Inc. [OABI] Date of Earliest Transaction Required to be Reported (Month/Day/Year): December 1, 2022 Designated Filer: Avista Acquisition GP LLC II Signature: By: /s/ Benjamin Silbert --------------------------------------- Name: Benjamin Silbert, Attorney-in-Fact for Thompson Dean Dated: December 5, 2022 Joint Filer Information ------------------------- (continued) Name of Joint Filer: David Burgstahler Address of Joint Filer: 65 East 55th Street, 18th Floor New York, NY 10022 Relationship of Joint Filer to Issuer: 10% Owner, Director Issuer Name and Ticker or Trading Symbol: OmniAb,Inc. [OABI] Date of Earliest Transaction Required to be Reported (Month/Day/Year): December 1, 2022 Designated Filer: Avista Acquisition GP LLC II Signature: By: /s/ Benjamin Silbert ---------------------------------------- Name: Benjamin Silbert, Attorney-in-Fact for David Burgstahler Dated: December 5, 2022 Joint Filer Information ------------------------- (continued) Name of Joint Filer: Joshua Tamaroff Address of Joint Filer: 65 East 55th Street, 18th Floor New York, NY 10022 Relationship of Joint Filer to Issuer: 10% Owner, Director Issuer Name and Ticker or Trading Symbol: OmniAb,Inc. [OABI] Date of Earliest Transaction Required to be Reported (Month/Day/Year): December 1, 2022 Designated Filer: Avista Acquisition GP LLC II Signature: By: /s/ Charles S. Berkman ---------------------------------------- Name: Charles S. Berkman, Attorney-in-Fact for Joshua Tamaroff Dated: December 5, 2022