DEXCOM INC — Director's Dealing 2014

Mar 10, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2014-03-06

Reporting Person: GREGG TERRANCE H (Director, CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-03-06	Common Stock	M	8000.0	$8.95	Acquired	220813	Direct
2014-03-06	Common Stock	S	8000.0	$47.5112	Disposed	212813	Direct
2014-03-06	Common Stock	M	12500.0	$6.85	Acquired	225313	Direct
2014-03-06	Common Stock	S	12500.0	$48.0184	Disposed	212813	Direct
2014-03-08	Common Stock	A	182813.0	$0.0010	Acquired	395626	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-03-06	Non-Qualified Stock Option (right to buy)	$6.85	M	12500.0	Disposed	2017-06-19	Common Stock (12500)	Direct
2014-03-06	Non-Qualified Stock Option (right to buy)	$8.95	M	8000.0	Disposed	2018-01-02	Common Stock (8000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	11461	Indirect
Common Stock	712889	Indirect

Footnotes

F1: Included in this number are 182,813 unvested restricted stock units granted on March 8, 2014, 5,078 of which shall vest each month through March 8, 2017, and 126,954 unvested restricted stock units granted on March 11, 2013, 5,078 of which shall vest each month through March 11, 2016.

F2: Represents a grant of restricted stock units that are exempt from Section 16 b-3 and are subject to vesting over a 36 month period from the date of grant as follows: 1/36th shall vest each month beginning one month following the date of grant. Share units represent a contingent right to receive one share of DexCom, Inc. common stock.