DEXCOM INC — Director's Dealing 2013

Nov 15, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2013-11-13

Reporting Person: GREGG TERRANCE H (CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-11-13	Common Stock	M	10000.0	$6.85	Acquired	222813	Direct
2013-11-13	Common Stock	S	10000.0	$33.2893	Disposed	212813	Direct
2013-11-14	Common Stock	M	10000.0	$6.85	Acquired	222813	Direct
2013-11-14	Common Stock	S	10000.0	$32.5	Disposed	212813	Direct
2013-11-15	Common Stock	M	15000.0	$3.19	Acquired	227813	Direct
2013-11-15	Common Stock	S	15000.0	$32.5258	Disposed	212813	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-11-15	Non-Qualified Stock Option (right to buy)	$3.19	M	15000.0	Disposed	2018-12-11	Common Stock (15000)	Direct
2013-11-13	Non-Qualified Stock Option (right to buy)	$6.85	M	10000.0	Disposed	2017-06-19	Common Stock (10000)	Direct
2013-11-14	Non-Qualified Stock Option (right to buy)	$6.85	M	10000.0	Disposed	2017-06-19	Common Stock (10000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	11461	Indirect
Common Stock	741889	Indirect

Footnotes

F1: Included in this number are 81,251 unvested restricted stock units granted on March 8, 2012, 5,078 of which shall vest each month through March 8, 2015 and 20,313 unvested restricted stock units granted on March 8, 2011, 5,078 of which shall vest each month through March 8, 2014.

F2: Shares are held by the Gregg Family Trust U/A/D 12/23/1998, with respect to which the reporting person is a trustee.