<SEC-DOCUMENT>0001968582-25-001172.txt : 20251208
<SEC-HEADER>0001968582-25-001172.hdr.sgml : 20251208
<ACCEPTANCE-DATETIME>20251208171130
ACCESSION NUMBER:		0001968582-25-001172
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:			Sotera Health Co
		CENTRAL INDEX KEY:			0001822479
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MISC HEALTH & ALLIED SERVICES, NEC [8090]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				473531161
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-39729
		FILM NUMBER:		251556921

	BUSINESS ADDRESS:	
		STREET 1:		9100 SOUTH HILLS BLVD, SUITE 300
		CITY:			BROADVIEW HEIGHTS
		STATE:			OH
		ZIP:			44147
		BUSINESS PHONE:		440-262-1410

	MAIL ADDRESS:	
		STREET 1:		9100 SOUTH HILLS BLVD, SUITE 300
		CITY:			BROADVIEW HEIGHTS
		STATE:			OH
		ZIP:			44147

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Sotera Health Topco, Inc.
		DATE OF NAME CHANGE:	20200824

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Petras Michael B. Jr.
		CENTRAL INDEX KEY:			0001832387
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		9100 SOUTH HILLS BLVD
		STREET 2:		SUITE 300
		CITY:			BROADVIEW HEIGHTS
		STATE:			OH
		ZIP:			44147
</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">
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  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001832387</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001822479</issuerCik>
      <issuerName>Sotera Health Company</issuerName>
      <secFileNumber>001-39729</secFileNumber>
      <issuerAddress>
        <com:street1>9100 South Hills Boulevard</com:street1>
        <com:street2>Suite 300</com:street2>
        <com:city>Broadview Heights</com:city>
        <com:stateOrCountry>OH</com:stateOrCountry>
        <com:zipCode>44147</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>440-262-1410</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Michael B. Petras, Jr.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Chairman, CEO</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>J.P. Morgan Securities LLC</name>
        <address>
          <com:street1>270 Park Avenue, 10th Floor</com:street1>
          <com:city>New York</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10017</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>750000</noOfUnitsSold>
      <aggregateMarketValue>12562500</aggregateMarketValue>
      <noOfUnitsOutstanding>284093929</noOfUnitsOutstanding>
      <approxSaleDate>12/08/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>11/20/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Compensation</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>35967</amountOfSecuritiesAcquired>
      <paymentDate>11/20/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>11/20/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Compensation</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>35967</amountOfSecuritiesAcquired>
      <paymentDate>11/20/2023</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>03/02/2024</acquiredDate>
      <natureOfAcquisitionTransaction>Compensation</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>83905</amountOfSecuritiesAcquired>
      <paymentDate>03/02/2024</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>11/20/2024</acquiredDate>
      <natureOfAcquisitionTransaction>Compensation</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>35967</amountOfSecuritiesAcquired>
      <paymentDate>11/20/2024</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>03/02/2025</acquiredDate>
      <natureOfAcquisitionTransaction>Compensation</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>124007</amountOfSecuritiesAcquired>
      <paymentDate>03/02/2025</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>06/17/2016</acquiredDate>
      <natureOfAcquisitionTransaction>Pre-IPO shares</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>83</amountOfSecuritiesAcquired>
      <paymentDate>06/17/2016</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>06/17/2016</acquiredDate>
      <natureOfAcquisitionTransaction>Pre-IPO shares</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>39243</amountOfSecuritiesAcquired>
      <paymentDate>06/17/2016</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>06/17/2016</acquiredDate>
      <natureOfAcquisitionTransaction>Pre-IPO shares</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>394861</amountOfSecuritiesAcquired>
      <paymentDate>06/17/2016</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>Of the shares filed today, 315,896 shares will be sold by the reporting person, 39,243 shares will be sold by the reporting person's family trust, and 394,861 shares will be sold by the reporting person's grantor trust.</remarks>
    <noticeSignature>
      <noticeDate>12/08/2025</noticeDate>
      <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Michael B. Petras, Jr.</signature>
    </noticeSignature>
  </formData>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
