<SEC-DOCUMENT>0001354116-25-000001.txt : 20250522
<SEC-HEADER>0001354116-25-000001.hdr.sgml : 20250522
<ACCEPTANCE-DATETIME>20250522132720
ACCESSION NUMBER:		0001354116-25-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250521
FILED AS OF DATE:		20250522
DATE AS OF CHANGE:		20250522

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Wright MaryAnn
		CENTRAL INDEX KEY:			0001354116
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40284
		FILM NUMBER:		25976047

	MAIL ADDRESS:	
		STREET 1:		486 S. PIERCE AVE., SUITE E
		CITY:			LOUISVILLE
		STATE:			CO
		ZIP:			80027

	FORMER NAME:	
		FORMER CONFORMED NAME:	Wright Mary Ann
		DATE OF NAME CHANGE:	20060222

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Solid Power, Inc.
		CENTRAL INDEX KEY:			0001844862
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				861888095
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		486 S. PIERCE AVE., SUITE E
		CITY:			LOUISVILLE
		STATE:			CO
		ZIP:			80027
		BUSINESS PHONE:		(303) 219-0720

	MAIL ADDRESS:	
		STREET 1:		486 S. PIERCE AVE., SUITE E
		CITY:			LOUISVILLE
		STATE:			CO
		ZIP:			80027

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Decarbonization Plus Acquisition Corp III
		DATE OF NAME CHANGE:	20210208
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-05-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001844862</issuerCik>
        <issuerName>Solid Power, Inc.</issuerName>
        <issuerTradingSymbol>SLDP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001354116</rptOwnerCik>
            <rptOwnerName>Wright MaryAnn</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>486 S. PIERCE AVE., SUITE E</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOUISVILLE</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80027</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-05-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>118808</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>287597</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Kristen Gould, attorney-in-fact on behalf of MaryAnn Wright</signatureName>
        <signatureDate>2025-05-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
