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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
1343856	A Jorge Valdes	6340 Sequence Drive San Diego CA 92121	Cto	No	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	2012-12-12	4,122	$14.29	27,750	No	4	S	Indirect	by Trust
Common Stock	Disposition	2012-12-13	4,811	$14.10	22,939	No	4	S	Indirect	by Trust
Common Stock	Disposition	2012-12-13	22,939	$14.00	0	No	4	S	Indirect	by Trust

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	153,323	Direct

Footnotes

This transaction was executed in multiple trades at prices ranging from $14.29 to $14.30. 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.
Shares are held by Jorge A. Valdes and Suzanne Lopez-Calleja, Joint Tenants.