DEXCOM INC — Director's Dealing 2012

Sep 18, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2012-09-14

Reporting Person: GREGG TERRANCE H (Director, CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-09-14	Common Stock	S	9000	$13.5	Disposed	940889	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	30000	Direct
Common Stock	11461	Indirect

Footnotes

F1: 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.

F2: 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.

F3: Shares are held by the Gregg Family Trust U/A/D 12/23/1998, with respect to which the reporting person is a trustee.