DEXCOM INC — Director's Dealing 2018

Aug 27, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2018-08-23

Reporting Person: ACE HEATHER S (SVP Human Resources)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-08-23	Common Stock	D	3061	$141.5916	Disposed	71171	Direct

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 58,431 unvested restricted stock units, 30,093 of which were granted on March 8, 2018 and shall vest through March 8, 2021, 14,588 of which were granted on March 8, 2017 and shall vest through March 8, 2020 and 13,750 of which were granted on August 22, 2016 and shall vest through August 22, 2020.