DEXCOM INC — Director's Dealing 2018

Nov 14, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2018-11-09

Reporting Person: ACE HEATHER S (SVP Human Resources)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-11-09	Common Stock	S	900	$145.9089	Disposed	68439	Direct
2018-11-09	Common Stock	S	1858	$147.1755	Disposed	66581	Direct
2018-11-09	Common Stock	S	1000	$147.8715	Disposed	65581	Direct
2018-11-09	Common Stock	S	400	$149.1675	Disposed	65181	Direct
2018-11-09	Common Stock	S	100	$149.85	Disposed	65081	Direct

Footnotes

F1: On August 30, 2018, Ms. Ace adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Ace. 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 $145.43 to $146.23. 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 54,784 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 13,750 of which were granted on August 22, 2016 and shall vest through August 22, 2020.

F4: This transaction was executed in multiple trades at prices ranging from $146.56 to $147.54. 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.

F5: This transaction was executed in multiple trades at prices ranging from $147.56 to $148.48. 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.

F6: This transaction was executed in multiple trades at prices ranging from $148.70 to $149.69. 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.