DEXCOM INC — Director's Dealing 2011

Mar 10, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2011-03-08

Reporting Person: VALDES JORGE A (CTO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-03-08	Common Stock	A	71621	$0.001	Acquired	103493	Direct
2011-03-08	Common Stock	A	31250	$0.001	Acquired	134743	Direct

Footnotes

F1: Share units are restricted and subject to vesting over a 36 month period from the date of grant as follows: 1/3 shall vest 12 months from the Grant Date, and the remaining balance shall vest in four equal installments over the following 24 months. Share units represent a contingent right to receive one share of DexCom, Inc. common stock.

F2: Share units are restricted and subject to vesting over a 27 month period from the date of grant as follows: 1/2 shall vest 12 months from the Grant Date, 1/6 shall vest 18 months from the Grant Date, 1/6 shall vest 24 months from the grant date, and the remaining balance shall vest 27 months from the Grant Date. Share units represent a contingent right to receive one share of DexCom, Inc. common stock.