<SEC-DOCUMENT>0002001011-25-000024.txt : 20250401
<SEC-HEADER>0002001011-25-000024.hdr.sgml : 20250401
<ACCEPTANCE-DATETIME>20250401191636
ACCESSION NUMBER:		0002001011-25-000024
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250401
DATE AS OF CHANGE:		20250401

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:		25801427

	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:			GUSTAFSON KURT A
		CENTRAL INDEX KEY:			0001462354
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		11388 SORRENTO VALLEY ROAD
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
</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>0001462354</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>GUSTAFSON KURT A</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>11963</noOfUnitsSold>
      <aggregateMarketValue>28351.09</aggregateMarketValue>
      <noOfUnitsOutstanding>122134941</noOfUnitsOutstanding>
      <approxSaleDate>04/01/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <acquiredDate>04/01/2025</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED STOCK</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>23244</amountOfSecuritiesAcquired>
      <paymentDate>04/01/2025</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Kurt A Gustafson</name>
        <address>
          <com:street1>5980 HORTON STREET SUITE 600</com:street1>
          <com:city>EMERYVILLE</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>94608</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <saleDate>02/19/2025</saleDate>
      <amountOfSecuritiesSold>7255</amountOfSecuritiesSold>
      <grossProceeds>26625.95</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Kurt A Gustafson</name>
        <address>
          <com:street1>5980 HORTON STREET SUITE 600</com:street1>
          <com:city>EMERYVILLE</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>94608</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <saleDate>01/21/2025</saleDate>
      <amountOfSecuritiesSold>15526</amountOfSecuritiesSold>
      <grossProceeds>50270.79</grossProceeds>
    </securitiesSoldInPast3Months>
    <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>04/01/2025</noticeDate>
      <signature>/s/ Charles S. Berkman, as Attorney-In-Fact for Kurt A. Gustafson</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
