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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
1464741	John Lister	6340 Sequence Drive San Diego CA 92121	Vp Of Legal Affairs	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
Common Stock	Acquisiton	2013-03-11	35,000	$0.00	90,210	No	4	A	Direct
Common Stock	Disposition	2013-03-11	4,500	$15.75	85,710	No	4	S	Direct
Common Stock	Disposition	2013-03-13	5,947	$15.69	79,763	No	4	D	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	A	Direct
No	4	S	Direct
No	4	D	Direct

Footnotes

Represents a grant of restricted stock units that are exempt from Section 16 b-3 and are subject to vesting over a 36 month period from the date of grant as follows: 1/3 shall vest 12 months from the Grant Date, and the remaining balance shall vest in four equal installments over the following 24 months. Share units represent a contingent right to receive one share of DexCom, Inc. common stock.
Included in this number are 65,667 unvested restricted stock units, 35,000 of which were granted on March 11, 2013 and shall vest through March 11, 2016, 22,083 of which were granted on March 8, 2012 and shall vest through March 8, 2015, and 8,584 of which were granted on March 8, 2011 and shall vest through March 8, 2014.
These shares were sold to cover the Company's tax withholding obligation that accrued in connection with the vesting of restricted stock units previously granted.