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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1093557	Dexcom Inc	DXCM	Surgical & Medical Instruments & Apparatus (3841)	330857544

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1236388	H Terrance Gregg	6340 Sequence Drive San Diego CA 92121	Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2012-09-14	9,000	$13.50	940,889	No	4	S	Indirect	by Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	by Trust

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	30,000	Direct
Common Stock	11,461	Indirect	by IRA

Footnotes

This transaction was executed in multiple trades at prices ranging from $13.30 to $13.61. 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 issurer full information regarding the number of shares and prices at which the transactions were effected.
Included in this number are 24,375 unvested restricted stock units granted on March 12, 2010, 4,062 of which shall vest each month through March 12, 2013; 91,407 unvested restricted stock units granted on March 8, 2011, 5,078 of which shall vest each month through March 8, 2014; and 152,345 unvested restricted stock units granted on March 8, 2012, 5,078 of which shall vest each month through March 8, 2015.
Shares are held by the Gregg Family Trust U/A/D 12/23/1998, with respect to which the reporting person is a trustee.