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      <issuerName>ACME UNITED CORP</issuerName>
      <secFileNumber>001-07698</secFileNumber>
      <issuerAddress>
        <com:street1>1 WATERVIEW DRIVE</com:street1>
        <com:city>SHELTON</com:city>
        <com:stateOrCountry>CT</com:stateOrCountry>
        <com:zipCode>06484</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>203-254-6060</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>OLSCHAN BRIAN S</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>245 Summer Street</com:street1>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>11000</noOfUnitsSold>
      <aggregateMarketValue>286770.00</aggregateMarketValue>
      <noOfUnitsOutstanding>3545725</noOfUnitsOutstanding>
      <approxSaleDate>07/24/2023</approxSaleDate>
      <securitiesExchangeName>AMEX</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>07/24/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>11000</amountOfSecuritiesAcquired>
      <paymentDate>07/24/2023</paymentDate>
      <natureOfPayment>Cash/ check</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Brian Olschan</name>
        <address>
          <com:street1>1 Waterview Drive</com:street1>
          <com:city>Shelton</com:city>
          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06484</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>04/28/2023</saleDate>
      <amountOfSecuritiesSold>1023</amountOfSecuritiesSold>
      <grossProceeds>26963.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Brian Olschan</name>
        <address>
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          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06484</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>05/01/2023</saleDate>
      <amountOfSecuritiesSold>55</amountOfSecuritiesSold>
      <grossProceeds>1441.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
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          <com:zipCode>06484</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>05/04/2023</saleDate>
      <amountOfSecuritiesSold>700</amountOfSecuritiesSold>
      <grossProceeds>18374.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Brian Olschan</name>
        <address>
          <com:street1>1 Waterview Drive,</com:street1>
          <com:city>Shelton</com:city>
          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06484</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>05/09/2023</saleDate>
      <amountOfSecuritiesSold>2681</amountOfSecuritiesSold>
      <grossProceeds>69830.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Brian Olschan</name>
        <address>
          <com:street1>1 Waterview Drive,</com:street1>
          <com:city>Shelton</com:city>
          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06484</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>05/10/2023</saleDate>
      <amountOfSecuritiesSold>1700</amountOfSecuritiesSold>
      <grossProceeds>44626.00</grossProceeds>
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    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Brian Olschan</name>
        <address>
          <com:street1>1 Waterview Drive,,</com:street1>
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          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06484</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>05/30/2023</saleDate>
      <amountOfSecuritiesSold>1860</amountOfSecuritiesSold>
      <grossProceeds>48833.00</grossProceeds>
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    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Brian Olschan</name>
        <address>
          <com:street1>1 Waterview Drive,,,</com:street1>
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          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06484</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>06/05/2023</saleDate>
      <amountOfSecuritiesSold>3910</amountOfSecuritiesSold>
      <grossProceeds>98219.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>07/24/2023</noticeDate>
      <signature>/s/ Cristina Garcia as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Brian Olschan</signature>
    </noticeSignature>
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144
0001213244
XXXXXXXX
LIVE
0000002098
ACME UNITED CORP
001-07698
1 WATERVIEW DRIVE
SHELTON
CT
06484
203-254-6060
OLSCHAN BRIAN S
Officer
Common
Fidelity Brokerage Services LLC
245 Summer Street
Boston
MA
02110
11000
286770.00
3545725
07/24/2023
AMEX
Common
07/24/2023
Stock Option Exercise
Issuer
N
11000
07/24/2023
Cash/ check
N
Brian Olschan
1 Waterview Drive
Shelton
CT
06484
Common
04/28/2023
1023
26963.00
Brian Olschan
1 Waterview Drive
Shelton
CT
06484
Common
05/01/2023
55
1441.00
Brian Olschan
1 Waterview Drive,
Shelton
CT
06484
Common
05/04/2023
700
18374.00
Brian Olschan
1 Waterview Drive,
Shelton
CT
06484
Common
05/09/2023
2681
69830.00
Brian Olschan
1 Waterview Drive,
Shelton
CT
06484
Common
05/10/2023
1700
44626.00
Brian Olschan
1 Waterview Drive,,
Shelton
CT
06484
Common
05/30/2023
1860
48833.00
Brian Olschan
1 Waterview Drive,,,
Shelton
CT
06484
Common
06/05/2023
3910
98219.00
07/24/2023
/s/ Cristina Garcia as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Brian Olschan