DEXCOM INC — Director's Dealing 2010

Mar 17, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2010-03-15

Reporting Person: LUCAS DONALD L (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-03-15	Common Stock	S	10000	$9.792	Disposed	69076	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	359833	Indirect

Footnotes

F1: Shares are held by Donald L. Lucas Profit Sharing Trust, with respect to which the reporting person is a trustee.

F2: Shares are held by Donald L. Lucas, TTEE, Donald L. Lucas & Lygia S. Lucas Trust, dated 12/03/84, with respect to which the reporting person is a trustee.