DEXCOM INC — Director's Dealing 2020

May 27, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DEXCOM INC (DXCM)
CIK: 0001093557
Period of Report: 2020-05-22

Reporting Person: ALTMAN STEVEN R (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-21	Common Stock	J	2676	$0.0	Disposed	0	Direct
2020-05-22	Common Stock	A	806	$0.001	Acquired	806	Direct
2020-05-21	Common Stock	J	2676	$0.0	Acquired	48980	Indirect

Footnotes

F1: Shares were transferred from direct ownership to ownership under the Steven R. and Lisa J. Altman, TTEE's Altman Family Trust DTD 8/21/92, upon vesting of previously awarded restricted stock units.

F2: The RSU Award was granted on May 22, 2020 and 100% of the RSU will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2021 Annual Meeting. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement.

F3: Represents 806 restricted stock units which were granted on May 22, 2020 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom Inc's 2021 Annual Meeting.

F4: Shares are held by the Steven R. and Lisa J. Altman, TTEE's Altman Family Trust DTD 8/21/92, with respect to which the reporting person is a trustee.