Exhibit 99.1

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):	November 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: November 3, 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):	November 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: November 3, 2022

2

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):	November 1, 2022
Designated Filer:	Avista Acquisition GP LLC II

Signature:
By:	/s/ Benjamin Silbert
	Name: Benjamin Silbert, Attorney-in-Fact for Thompson Dean

Dated: November 3, 2022

3

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):	November 1, 2022
Designated Filer:	Avista Acquisition GP LLC II

Signature:
By:	/s/ Benjamin Silbert
	Name: Benjamin Silbert, Attorney-in-Fact for David Burgstahler

Dated: November 3, 2022

4