DEXCOM INC — Director's Dealing 2016

Dec 13, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2016-12-09

Reporting Person: VALDES JORGE A (CTO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-12-09	Common Stock	M	2637	$7.79	Acquired	74971	Direct
2016-12-09	Common Stock	S	2637	$64.8079	Disposed	72334	Direct
2016-12-09	Common Stock	M	3438	$7.25	Acquired	75772	Direct
2016-12-09	Common Stock	S	3438	$64.8079	Disposed	72334	Direct
2016-12-09	Common Stock	M	3925	$7.79	Acquired	76259	Direct
2016-12-09	Common Stock	S	3925	$64.8079	Disposed	72334	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-12-09	Incentive Stock Option (right to buy)	$7.25	M	3438	Disposed	2017-03-09	Common Stock (3438)	Direct
2016-12-09	Incentive Stock Option (right to buy)	$7.79	M	2637	Disposed	2017-08-02	Common Stock (2637)	Direct
2016-12-09	Non-Qualified Stock Option (right to buy)	$7.79	M	3925	Disposed	2017-08-02	Common Stock (3925)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3499	Indirect

Footnotes

F1: On November 4, 2016 Mr. Valdes adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Valdes. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2: Included in this number are 72,334 unvested restricted stock units, 38,000 of which were granted on March 8, 2016 and shall vest through March 8, 2019, 22,500 of which were granted on March 8, 2015 and shall vest through March 8, 2018 and 11,834 of which were granted on March 8, 2014 and shall vest through March 8, 2017.

F3: Shares are held by the Valdes-Lopez-Calleja Family Trust U/A/D 05/18/2011, with respect to which the reporting person is a trustee.