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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
1236388	H Terrance Gregg	6340 Sequence Drive San Diego CA 92121	Executive Chairman	Yes	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	Disposition	2018-07-16	5,600	$99.23	55,282	No	4	S	Indirect	by Trust
Common Stock	Disposition	2018-07-16	3,900	$99.87	51,382	No	4	S	Indirect	by Trust
Common Stock	Disposition	2018-07-16	500	$100.73	50,882	No	4	S	Indirect	by Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	by Trust
No	4	S	Indirect	by Trust
No	4	S	Indirect	by Trust

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	441,674	Direct
Common Stock	11,461	Indirect	by IRA

Footnotes

On December 5, 2017, Mr. Gregg adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Gregg. The shares set forth above were sold pursuant to the 10b5-1 Plan.
This transaction was executed in multiple trades at prices ranging from $98.64 and $99.63. 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.
Shares are held by the Gregg Family Trust U/A/D 12/23/1998, with respect to which the reporting person is a trustee.
This transaction was executed in multiple trades at prices ranging from $99.64 to $100.08. 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.