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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1093557	Dexcom Inc	DXCM	Surgical & Medical Instruments & Apparatus (3841)	330857544

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1466545	Richard Doubleday	6340 Sequence Drive San Diego CA 92121	Evp, Chief Commercial Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2015-02-23	4,000	$6.03	124,524	No	4	M	Direct
Common Stock	Disposition	2015-02-23	4,000	$63.58	120,524	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2015-02-23	4,000	$63.58	4,000	$6.03

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
6,000	2010-06-22	2019-06-22	No	4	M	Direct

Footnotes

On March 10, 2014, Mr. Doubleday adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Doubleday. The shares set forth above were sold pursuant to the 10b5-1 Plan.
This transaction was executed in multiple trades at prices ranging from $62.81 to $64.32. 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.
Included in this number are 89,271 unvested restricted stock units, 50,000 of which were granted on March 8, 2014 and shall vest through March 8, 2017, 10,000 of which were granted on May 31, 2013 and shall vest through May 31, 2016, 25,000 of which were granted on March 11, 2013 and shall vest through March 11, 2016, and 4,271 of which were granted on March 8, 2012 and shall vest through March 8, 2015.