DEXCOM INC — Director's Dealing 2010

Aug 18, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2010-08-16

Reporting Person: CARNER DAVID (VP, Quality Assurance)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-08-16	Incentive Stock Option (right to buy)	$12.73	A	31420	Acquired	2020-08-16	Common Stock (31420)	Direct
2010-08-16	Non-Qualified Stock Option (right to buy)	$12.73	A	68580	Acquired	2020-08-16	Common Stock (68580)	Direct

Footnotes

F1: The option vests and becomes exercisable with respect to 1/4th of the shares one year after the date of grant, and thereafter continues to vest and become exercisable as to 1/48th of the shares each month thereafter (with the shares fully vested on the 4th anniversary of the date of grant).

F2: Not applicable