DEXCOM INC — Director's Dealing 2021

Mar 11, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2021-03-08

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-02-17	Common Stock	G	10000	$0.0	Disposed	121934	Direct
2021-03-08	Common Stock	A	13445	$0.001	Acquired	135379	Direct
2021-03-09	Common Stock	S	306	$356.94	Disposed	135073	Direct
2021-03-09	Common Stock	S	400	$358.7463	Disposed	134673	Direct
2021-03-09	Common Stock	S	550	$359.8227	Disposed	134123	Direct
2021-03-09	Common Stock	S	700	$361.0163	Disposed	133423	Direct
2021-03-09	Common Stock	S	1127	$362.293	Disposed	132296	Direct
2021-03-09	Common Stock	S	574	$362.8741	Disposed	131722	Direct
2021-03-09	Common Stock	S	200	$364.33	Disposed	131522	Direct

Footnotes

F1: The transaction represents a gift by the Reporting Person of 10,000 shares to a charitable donor advised fund.

F2: 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.

F3: Represents a grant of restricted stock units that are exempt from Section 16 b-3 and are subject to vesting in three equal annual installments from the date of grant. Share units represent a contingent right to receive one share of DexCom, Inc. Common Stock.

F4: Included in this number are 42,356 unvested restricted stock units, 13,445 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 16,968 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 11,943 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

F5: 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.

F6: This transaction was executed in multiple trades at prices ranging from $358.40 to $359.35. 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.

F7: This transaction was executed in multiple trades at prices ranging from $359.44 to $360.22. 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 $360.44 to $361.43. 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 $361.58 to $362.55. 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.

F10: This transaction was executed in multiple trades at prices ranging from $362.58 to $363.51. 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.

F11: This transaction was executed in multiple trades at prices ranging from $364.00 to $364.99. 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 issuer full information regarding the number of shares and prices at which the transactions were effected.