<SEC-DOCUMENT>0001093557-20-000045.txt : 20200304
<SEC-HEADER>0001093557-20-000045.hdr.sgml : 20200304
<ACCEPTANCE-DATETIME>20200304184240
ACCESSION NUMBER:		0001093557-20-000045
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200303
FILED AS OF DATE:		20200304
DATE AS OF CHANGE:		20200304

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FOLETTA MARK G
		CENTRAL INDEX KEY:			0001236389

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51222
		FILM NUMBER:		20688920

	MAIL ADDRESS:	
		STREET 1:		AMYLIN PHARMACEUTICALS INC
		STREET 2:		9360 TOWNE CENTRE DR
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DEXCOM INC
		CENTRAL INDEX KEY:			0001093557
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				330857544
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6340 SEQUENCE DRIVE
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		8582000200

	MAIL ADDRESS:	
		STREET 1:		6340 SEQUENCE DRIVE
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
</SEC-HEADER>
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<SEQUENCE>1
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        <issuerName>DEXCOM INC</issuerName>
        <issuerTradingSymbol>DXCM</issuerTradingSymbol>
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            <rptOwnerZipCode>92121</rptOwnerZipCode>
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                    <footnoteId id="F3"/>
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                <value>Common Stock</value>
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                </sharesOwnedFollowingTransaction>
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    <footnotes>
        <footnote id="F1">On August 30, 2019,  Mr. Foletta adopted a 10b5-1 Plan.  This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Foletta.   The shares set forth above were sold pursuant to the 10b5-1 Plan.</footnote>
        <footnote id="F2">This transaction was executed in multiple trades at prices ranging from $270.04 to $271.02.  The price above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.</footnote>
        <footnote id="F3">Shares are held by the Mark G. and Mary E. Foletta, TTEE's for the Foletta Family Trust DTD 1/30/15, with respect to which the reporting person is a trustee.</footnote>
        <footnote id="F4">This transaction was executed in multiple trades at prices ranging from $271.37 to $271.68.  The price above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.</footnote>
        <footnote id="F5">This transaction was executed in multiple trades at prices ranging from  $274.195 to $275.185.  The price above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.</footnote>
        <footnote id="F6">This transaction was executed in multiple trades at prices ranging from $275.385 to $275.66.  The price above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.</footnote>
        <footnote id="F7">This transaction was executed in multiple trades at prices ranging from $276.70 to $277.62.  The price above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.</footnote>
        <footnote id="F8">This transaction was executed in multiple trades at prices ranging from $278.985 to $279.935.  The price above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.</footnote>
        <footnote id="F9">This transaction was executed in multiple trades at prices ranging from $285.445 to $286.34.  The price above reflects the weighted average sale price.  The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Jereme Sylvain For: Mark G Foletta</signatureName>
        <signatureDate>2020-03-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
