DEXCOM INC — Director's Dealing 2018

Aug 15, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2018-08-13

Reporting Person: SAYER KEVIN R (Director, President, CEO & Chairman)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-08-13	Common Stock	M	11161	$4.58	Acquired	346332	Direct
2018-08-13	Common Stock	S	4448	$122.4094	Disposed	341884	Direct
2018-08-13	Common Stock	S	5535	$123.6462	Disposed	336349	Direct
2018-08-13	Common Stock	S	1178	$124.2375	Disposed	335171	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-08-13	Non-Qualified Stock Option (right to buy)	$4.58	M	11161	Disposed	2019-05-19	Common Stock (11161)	Direct

Footnotes

F1: On May 10, 2018, Mr. Sayer adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Sayer. The exercise and sale of shares set forth above were pursuant to the 10b5-1 Plan.

F2: Included in this number are 164,731 unvested restricted stock units, 80,545 of which were granted on March 8, 2018 and shall vest through March 8, 2021, 54,186 of which were granted on March 8, 2017 and shall vest through March 8, 2020, 30,000 of which were granted on March 8, 2016 and shall vest through March 8, 2019.

F3: This transaction was executed in multiple trades at prices ranging from $122.06 to $122.99. 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.

F4: This transaction was executed in multiple trades at prices ranging from $123.08 to $124.05. 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 $124.06 to $124.37. 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.