DEXCOM INC — Director's Dealing 2017

Mar 15, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2017-03-09

Reporting Person: Leach Jacob Steven (SVP, Research & Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-03-09	Common Stock	S	7329	$77.558	Disposed	98604	Direct
2017-03-09	Common Stock	S	3012	$77.2409	Disposed	95592	Direct
2017-03-10	Common Stock	D	1950	$77.5506	Disposed	93642	Direct
2017-03-10	Common Stock	D	5473	$77.5506	Disposed	88169	Direct
2017-03-10	Common Stock	D	2538	$77.5506	Disposed	85631	Direct
2017-03-10	Common Stock	M	7500	$7.63	Acquired	93131	Direct
2017-03-13	Common Stock	S	5194	$78.072	Disposed	87937	Direct
2017-03-13	Common Stock	S	2732	$77.7764	Disposed	85205	Direct
2017-03-14	Common Stock	S	3050	$77.3195	Disposed	82155	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-03-10	Incentive Stock Option (right to buy)	$7.63	M	7500	Disposed	2018-05-19	Common Stock (7500)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	12000	Indirect
Common Stock	50100	Indirect

Footnotes

F1: Included in this number are 57,800 unvested restricted stock units, 23,134 of which were granted on March 8, 2017 and shall vest through March 8, 2020, 21,333 of which were granted on March 8, 2016 shall vest through March 8, 2019 and 13,333 of which were granted on March 8, 2015 and shall vest through March 8, 2018.

F2: These shares were sold to cover the Company's tax withholding obligation that accrued in connection with the vesting of restricted stock units previously granted.

F3: Shares are held by the Gregg Family Grandchildren's Trust UAD 12/30/2010, with respect to which the reporting person's spouse is a trustee.

F4: Shares are held by the Kyndra S. Leach Trust UAD 12/12/2012, with respect to which the reporting person's spouse is a trustee.