DEXCOM INC — Director's Dealing 2018

Sep 13, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2018-09-10

Reporting Person: MOY JEFFREY (SVP, Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-09-10	Common Stock	S	1832	$143.7552	Disposed	66682	Direct
2018-09-10	Common Stock	S	2762	$143.7552	Disposed	63920	Direct
2018-09-10	Common Stock	J	17386	$0.0	Disposed	46534	Direct
2018-09-10	Common Stock	J	17386	$0.0	Acquired	22447	Indirect
2018-09-10	Common Stock	S	5736	$143.35	Disposed	16711	Indirect

Footnotes

F1: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F2: Included in this number are 46,534 unvested restricted stock units, 30,093 of which were granted on March 8, 2018 and shall vest through March 8, 2021, 10,941 of which were granted on March 8, 2017 and shall vest through March 8, 2020 and 5,500 of which were granted on March 8, 2016 and shall vest through March 8, 2019.

F3: Shares were transferred from direct ownership to ownership under the Moy Family Trust upon vesting of previously awarded restricted stock units.

F4: Shares are held by the Moy Family Trust U/A/D 12/09/2013, with respect to which the reporting person is a trustee.

F5: On May 29, 2018, Mr. Moy adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Moy. The shares set forth above were sold pursuant to the 10b5-1 Plan.