DEXCOM INC — Director's Dealing 2015

Apr 14, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2015-04-10

Reporting Person: MOY JEFFREY (SVP, Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-04-10	Common Stock	M	1956.0	$9.8	Acquired	91956	Direct
2015-04-10	Common Stock	S	1956.0	$65.7622	Disposed	90000	Direct
2015-04-10	Common Stock	M	810.0	$7.63	Acquired	90810	Direct
2015-04-10	Common Stock	S	810.0	$65.7622	Disposed	90000	Direct
2015-04-10	Common Stock	M	3000.0	$9.36	Acquired	93000	Direct
2015-04-10	Common Stock	S	3000.0	$65.7622	Disposed	90000	Direct
2015-04-10	Common Stock	M	5000.0	$9.36	Acquired	95000	Direct
2015-04-10	Common Stock	S	5000.0	$65.7778	Disposed	90000	Direct
2015-04-13	Common Stock	M	5000.0	$9.36	Acquired	95000	Direct
2015-04-13	Common Stock	S	5000.0	$67.7807	Disposed	90000	Direct
2015-04-14	Common Stock	S	5000.0	$67.3165	Disposed	163811	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-04-10	Incentive Stock Option (right to buy)	$7.63	M	810.0	Disposed	2018-05-19	Common Stock (810)	Direct
2015-04-10	Incentive Stock Option (right to buy)	$9.36	M	3000.0	Disposed	2017-09-20	Common Stock (3000)	Direct
2015-04-10	Incentive Stock Option (right to buy)	$9.36	M	5000.0	Disposed	2017-09-20	Common Stock (5000)	Direct
2015-04-13	Incentive Stock Option (right to buy)	$9.36	M	5000.0	Disposed	2017-09-20	Common Stock (5000)	Direct
2015-04-10	Incentive Stock Option (right to buy)	$9.8	M	1956.0	Disposed	2020-03-12	Common Stock (1956)	Direct

Footnotes

F1: This transaction was conducted under a 10b5-1 Plan, which was adopted on December 4, 2014 and amended on March 11, 2015. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Moy.

F2: This transaction was executed in multiple trades at prices ranging from $65.06 to $66.04. 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 90,000 unvested restricted stock units, 40,000 of which were granted on March 8, 2015 and shall vest through March 8, 2018, 33,333 of which were granted on March 8, 2014 and shall vest through March 08, 2017, and 16,667 of which were granted on March 11, 2013 and shall vest through March 11, 2016.

F4: This transaction was executed in multiple trades at prices ranging from $65.21 to $66.04 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 $67.34 to $68.58. 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 $66.80 to $67.81 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.

F7: Shares are held by the Moy Family Trust U/A/D 12/09/2013, with respect to which the reporting person is a trustee.