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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
1468345	Eric Topol	6340 Sequence Drive San Diego CA 92121		Yes	No	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	Disposition	2014-02-25	50,000	$45.17	90,909	No	4	S	Indirect	Family Holdings

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	Family Holdings

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	12,207	Direct

Footnotes

On December 30, 2013, Dr. Topol exercised 98,706 stock options granted to him on July 9, 2009. The 50,000 shares set forth above were sold to cover the tax liability which accrued upon the exercise of the 98,706 stock options.
This transaction was executed in multiple trades at prices ranging from $45.00 to $45.99. 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 issurer full information regarding the number of shares and prices at which the transactions were effected.
Shares are held by Topol Family Holdings, LLC, with respect to which the reporting person is a manager and maintains voting rights of these shares.