<SEC-DOCUMENT>0001677296-18-000002.txt : 20180213
<SEC-HEADER>0001677296-18-000002.hdr.sgml : 20180213
<ACCEPTANCE-DATETIME>20180213173937
ACCESSION NUMBER:		0001677296-18-000002
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20171231
FILED AS OF DATE:		20180213
DATE AS OF CHANGE:		20180213

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hanson Ron
		CENTRAL INDEX KEY:			0001677296

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37822
		FILM NUMBER:		18605368

	MAIL ADDRESS:	
		STREET 1:		9135 S RIDGELINE BLVD
		STREET 2:		SUITE 200
		CITY:			HIGHLANDS RANCH
		STATE:			CO
		ZIP:			80129

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Advanced Emissions Solutions, Inc.
		CENTRAL INDEX KEY:			0001515156
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS CHEMICAL PRODUCTS [2890]
		IRS NUMBER:				275472457
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		640 PLAZA DRIVE, SUITE 270
		CITY:			HIGHLANDS RANCH
		STATE:			CO
		ZIP:			80129
		BUSINESS PHONE:		720-598-3500

	MAIL ADDRESS:	
		STREET 1:		640 PLAZA DRIVE, SUITE 270
		CITY:			HIGHLANDS RANCH
		STATE:			CO
		ZIP:			80129
</SEC-HEADER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>wf-form5_151856156233144.xml
<DESCRIPTION>FORM 5
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2017-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0001515156</issuerCik>
        <issuerName>Advanced Emissions Solutions, Inc.</issuerName>
        <issuerTradingSymbol>ADES</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001677296</rptOwnerCik>
            <rptOwnerName>Hanson Ron</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>640 PLAZA DRIVE, SUITE 270</rptOwnerStreet1>
            <rptOwnerStreet2>C/O ADVANCED EMISSIONS SOLUTIONS, INC.</rptOwnerStreet2>
            <rptOwnerCity>HIGHLANDS RANCH</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80129</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP of Operations of ADA-ES</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-12-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>5</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>664</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.43</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>24904</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The Advanced Emissions Solutions, Inc. 401(k) Plan (the &quot;Plan&quot;) executed a non-volitional liquidation of all of the Issuer's securities held in the Plan, including 664 shares held in the reporting owner's account.</footnote>
        <footnote id="F2">Total holdings decreased by 1 share due to an accounting reconciliation.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ronald Hanson</signatureName>
        <signatureDate>2018-02-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
