DEXCOM INC — Director's Dealing 2021

Nov 16, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2021-11-15

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-11-12	Common Stock	G	3000	$0.0	Disposed	87705	Direct
2021-11-15	Common Stock	S	222	$644.5886	Disposed	87483	Direct
2021-11-15	Common Stock	S	250	$645.006	Disposed	87233	Direct
2021-11-15	Common Stock	S	200	$646.575	Disposed	87033	Direct
2021-11-15	Common Stock	S	1350	$647.922	Disposed	85683	Direct
2021-11-15	Common Stock	S	878	$649.0177	Disposed	84805	Direct
2021-11-15	Common Stock	S	50	$652.36	Disposed	84755	Direct
2021-11-15	Common Stock	S	50	$654.0	Disposed	84705	Direct

Footnotes

F1: The transaction represents a gift by the Reporting Person of 3,000 shares to a charitable donor advised fund.

F2: Included in this number are 36,385 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 5,972 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

F3: On July 31, 2020, Mr. Sayer adopted a 10b5-1 Plan, which was amended effective June 15, 2021. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Sayer. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F4: This transaction was executed in multiple trades at prices ranging from $643.86 to $644.68. 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 $644.99 to $645.02. 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 $646.57 to $646.58. 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 $647.64 to $648.53. 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 $648.64 to $649.475. 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.