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: DOUBLEDAY RICHARD (EVP, Chief Commercial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-08-31	Common Stock	J	20830	$0.0	Disposed	72287	Direct
2018-09-10	Common Stock	S	2303	$143.7552	Disposed	69984	Direct
2018-09-10	Common Stock	S	3180	$143.7552	Disposed	66804	Direct
2018-08-31	Common Stock	J	20830	$0.0	Acquired	20830	Indirect

Footnotes

F1: Shares were transferred from direct ownership to ownership under the Doubleday Living Trust U/A/D 5/26/2015, with respect to which the reporting person is a trustee.

F2: Included in this number are 58,591 unvested restricted stock units, 38,502 of which were granted on March 8, 2018 and shall vest through March 8, 2021, 13,755 of which were granted on March 8, 2017 and shall vest through March 8, 2020 and 6,334 of which were granted on March 8, 2016 and shall vest through March 8, 2019.

F3: 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.

F4: Shares are held by the Doubleday Living Trust U/A/D 5/26/2015, with respect to which the reporting person is a trustee.