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            <issuerName>ARCH RESOURCES, INC.</issuerName>
            <secFileNumber>001-13105</secFileNumber>
            <issuerAddress>
                <ns2:street1>1 CityPlace Drive</ns2:street1>
                <ns2:street2>Suite 300</ns2:street2>
                <ns2:city>St. Louis</ns2:city>
                <ns2:stateOrCountry>MO</ns2:stateOrCountry>
                <ns2:zipCode>63141</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(314) 994-2700</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>JOHN A ZIEGLER JR.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
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        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
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            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>15000</noOfUnitsSold>
            <aggregateMarketValue>2762154.00</aggregateMarketValue>
            <noOfUnitsOutstanding>18360691</noOfUnitsOutstanding>
            <approxSaleDate>03/07/2024</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
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        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/27/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>4102</amountOfSecuritiesAcquired>
            <paymentDate>02/27/2024</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
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            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1005</amountOfSecuritiesAcquired>
            <paymentDate>02/10/2024</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
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            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>512</amountOfSecuritiesAcquired>
            <paymentDate>02/09/2024</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/25/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
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            <amountOfSecuritiesAcquired>9381</amountOfSecuritiesAcquired>
            <paymentDate>02/25/2024</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
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                <name>JOHN A ZIEGLER JR</name>
                <address>
                    <ns2:street1>1 CityPlace Drive</ns2:street1>
                    <ns2:street2>Suite 300</ns2:street2>
                    <ns2:city>St. Louis</ns2:city>
                    <ns2:stateOrCountry>MO</ns2:stateOrCountry>
                    <ns2:zipCode>63141</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>02/26/2024</saleDate>
            <amountOfSecuritiesSold>3299</amountOfSecuritiesSold>
            <grossProceeds>558772.49</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>JOHN A ZIEGLER JR</name>
                <address>
                    <ns2:street1>1 CityPlace Drive</ns2:street1>
                    <ns2:street2>Suite 300</ns2:street2>
                    <ns2:city>St. Louis</ns2:city>
                    <ns2:stateOrCountry>MO</ns2:stateOrCountry>
                    <ns2:zipCode>63141</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>02/12/2024</saleDate>
            <amountOfSecuritiesSold>270</amountOfSecuritiesSold>
            <grossProceeds>45785.63</grossProceeds>
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                    <ns2:city>St. Louis</ns2:city>
                    <ns2:stateOrCountry>MO</ns2:stateOrCountry>
                    <ns2:zipCode>63141</ns2:zipCode>
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            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>02/09/2024</saleDate>
            <amountOfSecuritiesSold>148</amountOfSecuritiesSold>
            <grossProceeds>25492.71</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>03/07/2024</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ John A Ziegler Jr.</signature>
        </noticeSignature>
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144
0001546424
XXXXXXXX
LIVE
0001037676
ARCH RESOURCES, INC.
001-13105
1 CityPlace Drive
Suite 300
St. Louis
MO
63141
(314) 994-2700
JOHN A ZIEGLER JR.
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
15000
2762154.00
18360691
03/07/2024
NYSE
Common
02/27/2023
Restricted stock vesting under a registered plan
Issuer
N
4102
02/27/2024
Services Rendered
Common
02/10/2024
Restricted stock vesting under a registered plan
issuer
N
1005
02/10/2024
Services Rendered
Common
02/09/2024
Restricted stock vesting under a registered plan
Issuer
N
512
02/09/2024
Services Rendered
Common
02/25/2024
Restricted stock vesting under a registered plan
Issuer
N
9381
02/25/2024
Services Rendered
N
JOHN A ZIEGLER JR
1 CityPlace Drive
Suite 300
St. Louis
MO
63141
COMMON
02/26/2024
3299
558772.49
JOHN A ZIEGLER JR
1 CityPlace Drive
Suite 300
St. Louis
MO
63141
COMMON
02/12/2024
270
45785.63
JOHN A ZIEGLER JR
1 CityPlace Drive
Suite 300
St. Louis
MO
63141
COMMON
02/09/2024
148
25492.71
03/07/2024
/s/ John A Ziegler Jr.