<SEC-DOCUMENT>0001104659-21-147788.txt : 20211208
<SEC-HEADER>0001104659-21-147788.hdr.sgml : 20211208
<ACCEPTANCE-DATETIME>20211208200524
ACCESSION NUMBER:		0001104659-21-147788
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20211208
FILED AS OF DATE:		20211208
DATE AS OF CHANGE:		20211208

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Paprzycki Kevin A.
		CENTRAL INDEX KEY:			0001738972

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40284
		FILM NUMBER:		211479987

	MAIL ADDRESS:	
		STREET 1:		20149 ROYAL TROON DR.
		CITY:			MONUMENT
		STATE:			CO
		ZIP:			80132

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Decarbonization Plus Acquisition Corp III
		CENTRAL INDEX KEY:			0001844862
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		IRS NUMBER:				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
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>tm2134826d19_4seq1.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-12-08</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001844862</issuerCik>
        <issuerName>Decarbonization Plus Acquisition Corp III</issuerName>
        <issuerTradingSymbol>SLDP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001738972</rptOwnerCik>
            <rptOwnerName>Paprzycki Kevin A.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SOLID POWER, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>486 S. PIERCE AVE., SUITE E</rptOwnerStreet2>
            <rptOwnerCity>LOUISVILLE</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80027</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CFO and Treasurer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.92</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-12-08</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1034143</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2031-10-27</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1034143</value>
                    <footnoteId id="F2"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1034143</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">25% of the total number of shares issuable upon exercise of the option will vest on October 25, 2022, and 1/36 of the remaining shares issuable upon exercise of the option vest monthly thereafter.</footnote>
        <footnote id="F2">On December 8, 2021, the Issuer completed the merger (the &quot;Merger&quot;) pursuant to the as amended Business Combination Agreement and Plan of Reorganization, by and among the Issuer, a wholly owned subsidiary of the Issuer, and Solid Power, Inc. (&quot;Solid Power&quot;). At the effective time of the Merger (the &quot;Effective Time&quot;), each Solid Power option was converted into an option to purchase a number of shares of Common Stock of the Issuer, equal to the product (rounded down to the nearest whole number) of (x) the number of shares of Solid Power Common Stock subject to such Solid Power Option immediately prior to the Effective Time and (y) an exchange ratio calculated at closing (the &quot;Exchange Ratio&quot;), at an exercise price per share (rounded up to the nearest whole cent) equal to (A) the exercise price per share of such Solid Power Option immediately prior to the Effective Time divided by (B) the Exchange Ratio.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ James Liebscher, attorney-in-fact on behalf of Kevin Paprzycki</signatureName>
        <signatureDate>2021-12-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
