DEXCOM INC — Director's Dealing 2015

Jan 7, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2015-01-05

Reporting Person: MOY JEFFREY (SVP, Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-01-05	Common Stock	M	5000.0	$9.8	Acquired	87292	Direct
2015-01-05	Common Stock	S	5000.0	$55.2736	Disposed	82292	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-01-05	Non-Qualified Stock Option (right to buy)	$9.8	M	5000.0	Disposed	2020-03-12	Common Stock (5000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	153430	Indirect

Footnotes

F1: On December 4, 2014, Mr. Moy adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Moy. 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 $54.30 to $56.00. 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 82,292 unvested restricted stock units, 50,000 of which were granted on March 8, 2014 and shall vest through March 8, 2017, 25,000 of which were granted on March 11, 2013 and shall vest through March 11, 2016, and 7,292 of which were granted on March 8, 2012 and shall vest through March 8, 2015.

F4: Shares are held by the Moy Family Trust U/A/D 12/09/2013, with respect to which the reporting person is a trustee.