<SEC-DOCUMENT>0001959173-23-000241.txt : 20230315
<SEC-HEADER>0001959173-23-000241.hdr.sgml : 20230315
<ACCEPTANCE-DATETIME>20230315110114
ACCESSION NUMBER:		0001959173-23-000241
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230315
DATE AS OF CHANGE:		20230315

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MESA LABORATORIES INC /CO/
		CENTRAL INDEX KEY:			0000724004
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		IRS NUMBER:				840872291
		STATE OF INCORPORATION:			CO
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	000-11740
		FILM NUMBER:		23733854

	BUSINESS ADDRESS:	
		STREET 1:		12100 W 6TH AVE
		CITY:			LAKEWOOD
		STATE:			CO
		ZIP:			80228
		BUSINESS PHONE:		3039878000

	MAIL ADDRESS:	
		STREET 1:		12100 W 6TH AVE
		CITY:			LAKEWOOD
		STATE:			CO
		ZIP:			80228

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MESA LABORATORIES INC /CO
		DATE OF NAME CHANGE:	19951117

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MESA MEDICAL INC
		DATE OF NAME CHANGE:	19921123

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Sakys John
		CENTRAL INDEX KEY:			0001197710

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		MESA LABORATORIES, INC.
		STREET 2:		12100 W. 6TH AVENUE
		CITY:			LAKEWOOD
		STATE:			CO
		ZIP:			80228

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SAKYS JOHN V
		DATE OF NAME CHANGE:	20021010
</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>0001197710</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000724004</issuerCik>
      <issuerName>MESA LABORATORIES INC /CO/</issuerName>
      <secFileNumber>000-11740</secFileNumber>
      <issuerAddress>
        <com:street1>12100 W 6TH AVE</com:street1>
        <com:city>LAKEWOOD</com:city>
        <com:stateOrCountry>CO</com:stateOrCountry>
        <com:zipCode>80228</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>3039878000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Sakys John</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>900 Salem Street</com:street1>
          <com:city>Smithfield</com:city>
          <com:stateOrCountry>RI</com:stateOrCountry>
          <com:zipCode>02917</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1000</noOfUnitsSold>
      <aggregateMarketValue>165710.00</aggregateMarketValue>
      <noOfUnitsOutstanding>5346174</noOfUnitsOutstanding>
      <approxSaleDate>03/15/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/15/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Options Granted - 04/01/2015</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1000</amountOfSecuritiesAcquired>
      <paymentDate>03/15/2023</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Sakys</name>
        <address>
          <com:street1>12100 West Sixth Avenue</com:street1>
          <com:city>Lakewood</com:city>
          <com:stateOrCountry>CO</com:stateOrCountry>
          <com:zipCode>80228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>01/23/2023</saleDate>
      <amountOfSecuritiesSold>2100</amountOfSecuritiesSold>
      <grossProceeds>422495.56</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Sakys</name>
        <address>
          <com:street1>12100 West Sixth Avenue</com:street1>
          <com:city>Lakewood</com:city>
          <com:stateOrCountry>CO</com:stateOrCountry>
          <com:zipCode>80228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>02/09/2023</saleDate>
      <amountOfSecuritiesSold>1000</amountOfSecuritiesSold>
      <grossProceeds>184270.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>John Sakys</name>
        <address>
          <com:street1>12100 West Sixth Avenue</com:street1>
          <com:city>Lakewood</com:city>
          <com:stateOrCountry>CO</com:stateOrCountry>
          <com:zipCode>80228</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>03/09/2023</saleDate>
      <amountOfSecuritiesSold>400</amountOfSecuritiesSold>
      <grossProceeds>67988.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>03/15/2023</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>12/13/2021</planAdoptionDate>
      </planAdoptionDates>
      <signature>/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for  John Sakys</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
