DEXCOM INC — Director's Dealing 2021

Feb 4, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2021-02-01

Reporting Person: SAYER KEVIN R (Director, Chairman, CEO & President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-02-01	Common Stock	S	800	$373.4388	Disposed	143602	Direct
2021-02-01	Common Stock	S	400	$374.4663	Disposed	143202	Direct
2021-02-01	Common Stock	S	2323	$376.0459	Disposed	140879	Direct
2021-02-01	Common Stock	S	1406	$376.9074	Disposed	139473	Direct
2021-02-01	Common Stock	S	1350	$378.1078	Disposed	138123	Direct
2021-02-01	Common Stock	S	1095	$379.1995	Disposed	137028	Direct
2021-02-01	Common Stock	S	5094	$380.3046	Disposed	131934	Direct

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 31, 2020, and amended effective December 16, 2020. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Sayer.

F2: This transaction was executed in multiple trades at prices ranging from $373.00 to $373.74. 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 56,792 unvested restricted stock units, 25,453 of which were granted on March 8, 2020 and shall vest through March 8, 2023, 17,915 of which were granted on March 8, 2019 and shall vest through March 8, 2022, and 13,424 of which were granted on March 8, 2018 and shall vest through March 8, 2021.

F4: This transaction was executed in multiple trades at prices ranging from $374.270 to $374.915. 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 $375.40 to $376.35. 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 $376.43 to $377.27. 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: This transaction was executed in multiple trades at prices ranging from $377.67 to $378.62. 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.

F8: This transaction was executed in multiple trades at prices ranging from $378.72 to $379.60. 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.

F9: This transaction was executed in multiple trades at prices ranging from $379.79 to $380.65. 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.