DXCM Form 4: Director Heller sells 1,012 shares at $58.07

Rhea-AI Filing Summary

DexCom (DXCM) director Bridgette P. Heller reported an open-market sale of 1,012 common shares at $58.07 on November 12, 2025, executed under a Rule 10b5-1 trading plan adopted on August 14, 2025.

Following the transaction, she beneficially owns 27,031 shares directly, which include 5,046 unvested RSUs granted May 8, 2025 that vest on the earlier of the one-year anniversary or DexCom’s 2026 annual meeting.

Insider Trade Summary

Net Seller: 1,012 shares ($58,767)

Net Sell 1 txn

Insider Heller Bridgette P

Role Director

Sold 1,012 shs ($59K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,012	$58.07	$59K

Holdings After Transaction: Common Stock — 27,031 shares (Direct)

Footnotes (1)

1. On August 14, 2025, Ms. Heller adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Heller. The shares set forth above were sold pursuant to the 10b5-1 Plan. Included in this number are 5,046 unvested restricted stock units which were granted on May 8, 2025 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2026 Annual Meeting of Stockholders.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Heller Bridgette P

(Last) (First) (Middle)

6340 SEQUENCE DRIVE

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
DEXCOM INC [ DXCM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/12/2025		S		1,012(1)	D	$58.07	27,031(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. On August 14, 2025, Ms. Heller adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Heller. The shares set forth above were sold pursuant to the 10b5-1 Plan.

2. Included in this number are 5,046 unvested restricted stock units which were granted on May 8, 2025 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2026 Annual Meeting of Stockholders.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Jereme M. Sylvain, as Attorney-in-Fact for Bridgette P. Heller	11/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did DexCom (DXCM) disclose in this Form 4?

Director Bridgette P. Heller sold 1,012 DexCom common shares at $58.07 on November 12, 2025.

Was the DXCM share sale under a 10b5-1 plan?

Yes. The sale was made pursuant to a Rule 10b5-1 plan adopted on August 14, 2025.

How many DexCom shares does the reporting person now own?

She beneficially owns 27,031 shares directly.

What RSUs are included in the ownership figure for DXCM?

The total includes 5,046 unvested RSUs granted on May 8, 2025.

When will the reported RSUs vest for DXCM?

They vest on the earlier of the one-year anniversary of the grant date or DexCom’s 2026 annual meeting of stockholders.

What is the reporting person’s role at DexCom?

Bridgette P. Heller is a Director of DexCom, Inc.

What was the form of ownership for the remaining shares?

The remaining 27,031 shares are held with Direct ownership.