DEXCOM INC — Director's Dealing 2018

May 17, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2018-05-14

Reporting Person: SKYLER JAY S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-14	Common Stock	M	30000	$4.58	Acquired	52257	Indirect
2018-05-14	Common Stock	S	30000	$88.0	Disposed	22257	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-14	Non-Qualified Stock Option (right to buy)	$4.58	M	30000	Disposed	2019-05-19	Common Stock (30000)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	4553	Direct
Common Stock	10000	Indirect

Footnotes

F1: Shares are held by Skyler Bach Family Limited Partnership, LLP, with respect to which the reporting person is a managing partner of the partnership and maintains voting rights of these shares.

F2: The reporting person disclaims beneficial ownership of these securities and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.