DEXCOM INC — Director's Dealing 2021

Sep 14, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2021-09-09

Reporting Person: Selvaraj Shelly Ramasamy (SVP Information Technology)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-08-04	Common Stock	G	250	$0.0	Disposed	15886	Direct
2021-09-09	Common Stock	S	689	$541.36	Disposed	15229	Direct
2021-09-09	Common Stock	S	8	$542.94	Disposed	15221	Direct
2021-09-09	Common Stock	S	101	$541.0788	Disposed	15120	Direct
2021-09-09	Common Stock	S	60	$542.39	Disposed	15060	Direct
2021-09-09	Common Stock	S	80	$546.425	Disposed	14980	Direct
2021-09-09	Common Stock	S	280	$547.7086	Disposed	14700	Direct
2021-09-09	Common Stock	S	341	$548.8523	Disposed	14359	Direct
2021-09-09	Common Stock	S	423	$549.8634	Disposed	13936	Direct
2021-09-09	Common Stock	S	241	$550.6331	Disposed	13695	Direct
2021-09-10	Common Stock	S	681	$558.33	Disposed	13014	Direct

Footnotes

F1: This transaction represents a gift of securities made by the reporting person. This is not a market transaction, thus no price has been reported. Transferor retains no beneficial or voting interest in the transferred shares.

F2: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.

F3: Included in this number are 8,106 unvested restricted stock units, 3,073 of which were granted on March 8, 2021 and shall vest through March 8, 2024, 3,655 of which were granted on March 8, 2020 and shall vest through March 8, 2023, and 1,378 of which were granted on March 8, 2019 and shall vest through March 8, 2022.

F4: On May 30, 2019, Mr. Selvaraj adopted a 10b5-1 Plan which was amended on May 11, 2020. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Selvaraj. The shares set forth above were sold pursuant to the 10b5-1 Plan.

F5: This transaction was executed in multiple trades at prices ranging from $540.65 to $541.36. 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 $542.07 to $542.55. 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.

F7: This transaction was executed in multiple trades at prices ranging from $546.10 to $546.75. 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 $547.29 to $548.16. 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 $548.30 to $549.28. 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 $549.38 to $550.28. 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 $550.47 to $551.38. 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.