DEXCOM INC — Director's Dealing 2012

Dec 14, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2012-12-12

Reporting Person: VALDES JORGE A (CTO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-12-12	Common Stock	S	4122	$14.2923	Disposed	27750	Indirect
2012-12-13	Common Stock	S	4811	$14.1	Disposed	22939	Indirect
2012-12-13	Common Stock	S	22939	$14	Disposed	0	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	153323	Direct

Footnotes

F1: 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.

F2: Shares are held by Jorge A. Valdes and Suzanne Lopez-Calleja, Joint Tenants.