<SEC-DOCUMENT>0002001011-25-000118.txt : 20251208
<SEC-HEADER>0002001011-25-000118.hdr.sgml : 20251208
<ACCEPTANCE-DATETIME>20251208191433
ACCESSION NUMBER:		0002001011-25-000118
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251208
DATE AS OF CHANGE:		20251208

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OmniAb, Inc.
		CENTRAL INDEX KEY:			0001846253
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-40720
		FILM NUMBER:		251557271

	BUSINESS ADDRESS:	
		STREET 1:		5980 HORTON STREET
		STREET 2:		SUITE 600
		CITY:			EMERYVILLE
		STATE:			CA
		ZIP:			94608
		BUSINESS PHONE:		510-250-7800

	MAIL ADDRESS:	
		STREET 1:		5980 HORTON STREET
		STREET 2:		SUITE 600
		CITY:			EMERYVILLE
		STATE:			CA
		ZIP:			94608

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Avista Public Acquisition Corp. II
		DATE OF NAME CHANGE:	20210212

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Berkman Charles S
		CENTRAL INDEX KEY:			0001392266
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		11085 NORTH TORREY PINES ROAD
		STREET 2:		SUITE 300
		CITY:			LA JOLLA
		STATE:			CA
		ZIP:			92037
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001392266</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001846253</issuerCik>
      <issuerName>OmniAb, Inc.</issuerName>
      <secFileNumber>001-40720</secFileNumber>
      <issuerAddress>
        <com:street1>5980 HORTON STREET</com:street1>
        <com:street2>SUITE 600</com:street2>
        <com:city>EMERYVILLE</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>94608</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>510-250-7800</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Berkman Charles S</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES</name>
        <address>
          <com:street1>200 W CIVIC CENTER DR. 4TH FLOOR</com:street1>
          <com:city>SANDY</com:city>
          <com:stateOrCountry>UT</com:stateOrCountry>
          <com:zipCode>84070</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>8044</noOfUnitsSold>
      <aggregateMarketValue>15773.84</aggregateMarketValue>
      <noOfUnitsOutstanding>143955400</noOfUnitsOutstanding>
      <approxSaleDate>12/08/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <acquiredDate>12/07/2025</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED STOCK</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>15621</amountOfSecuritiesAcquired>
      <paymentDate>12/07/2025</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>Represents the number of shares expected 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.</remarks>
    <noticeSignature>
      <noticeDate>12/08/2025</noticeDate>
      <signature>/s/ Charles S. Berkman</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
