DEXCOM INC — Director's Dealing 2017

Feb 13, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2017-02-09

Reporting Person: LISTER JOHN (General Manager, EMEA)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-02-09	Common Stock	M	3000	$8.85	Acquired	73598	Direct
2017-02-09	Common Stock	S	3000	$79.7347	Disposed	70598	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-02-09	Incentive Stock Option (right to buy)	$8.85	M	3000	Disposed	2018-01-14	Common Stock (3000)	Direct

Footnotes

F1: On December 13, 2016, Mr. Lister adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Lister. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F2: This transaction was executed in multiple trades at prices ranging from $79.41 to $80.32. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

F3: Included in this number are 61,584 unvested restricted stock units, 32,000 of which were granted on June 30, 2016 and shall vest through March 8, 2019, 18,750 of which were granted on March 8, 2015 and shall vest through March 8, 2018 and 10,834 of which were granted on March 8, 2014 and shall vest through March 8, 2017.