Dexcom (NASDAQ: DXCM) HR chief holds 128,608 shares

Rhea-AI Filing Summary

DEXCOM INC (DXCM) reported that executive officer Sadie Stern, EVP Chief People & Culture Officer, had 1,451 shares of common stock withheld on August 22, 2026 to cover tax withholding and remittance obligations in connection with the net settlement of restricted stock units; this was not an open-market sale. After this withholding, Stern directly holds 128,608 shares of Dexcom common stock, including 71,903 unvested restricted stock units that vest on various schedules through March 8, 2029.

Insider Trade Summary

Net Seller: 1,451 shares

Net Sell 1 txn

Insider Stern Sadie

Role EVP Chief People & Culture Off

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1, F2	1,451	$92.34	$134K

Holdings After Transaction: Common Stock — 128,608 shares (Direct)

Footnotes (2)

1. F1. Represents the number of shares required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of restricted stock units and does not represent a sale by the Reporting Person.
2. F2. Included in this number are 71,903 unvested restricted stock units, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 5,699 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027.

Key Figures

Shares withheld for tax obligations: 1,451 shares Withholding reference price: $92.34 per share Shares held after transaction: 128,608 shares +5 more

8 metrics

Shares withheld for tax obligations 1,451 shares Common stock withheld on August 22, 2026 to cover tax withholding and remittance obligations on RSU net settlement

Withholding reference price $92.34 per share Reported price for the 1,451 shares withheld on August 22, 2026

Shares held after transaction 128,608 shares Direct Dexcom common stock holdings of Sadie Stern following the August 22, 2026 transaction

Unvested restricted stock units 71,903 RSUs Unvested Dexcom restricted stock units included in post-transaction holdings

RSUs granted March 8, 2026 39,019 RSUs Grant vesting through March 8, 2029

RSUs granted March 8, 2025 (2028 schedule) 19,948 RSUs Grant vesting through March 8, 2028

RSUs granted March 8, 2025 (2027 schedule) 5,699 RSUs Grant vesting through March 8, 2027

RSUs granted March 8, 2024 7,237 RSUs Grant vesting through March 8, 2027

Key Terms

restricted stock units, net settlement, tax withholding and remittance obligations

3 terms

restricted stock units financial

"Included in this number are 71,903 unvested restricted stock units, 39,019 of which..."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

net settlement financial

"in connection with the net settlement of restricted stock units and does not..."

tax withholding and remittance obligations financial

"shares required to be withheld by the Issuer to cover tax withholding and remittance obligations..."

FAQ

What insider transaction did DXCM disclose for executive Sadie Stern?

Sadie Stern had 1,451 Dexcom common shares withheld on August 22, 2026 to satisfy tax withholding and remittance obligations from net-settled restricted stock units. The filing states this event does not represent a sale by the reporting person.

Was the August 22, 2026 DXCM Form 4 transaction an open-market sale?

No. The 1,451 shares reported for Sadie Stern were withheld by Dexcom to cover tax withholding and remittance obligations tied to restricted stock units and do not represent a sale by Stern.

How many DXCM shares does Sadie Stern hold after the reported transaction?

Following the August 22, 2026 tax-withholding event, Sadie Stern directly holds 128,608 Dexcom common shares, according to the Form 4, including a substantial number of unvested restricted stock units.

How many unvested DXCM restricted stock units does Sadie Stern have and how do they vest?

Stern has 71,903 unvested restricted stock units. These include 39,019 granted March 8, 2026 vesting through March 8, 2029; 19,948 and 5,699 granted March 8, 2025 vesting through March 8, 2028 and March 8, 2027; and 7,237 granted March 8, 2024 vesting through March 8, 2027.

What price per share is associated with the DXCM tax-withholding transaction for Sadie Stern?

The Form 4 reports a price of $92.34 per share for the 1,451 shares withheld to satisfy tax obligations in connection with restricted stock units on August 22, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/25/2026 - 04:15 PM Accepted by SEC EDGAR 08/25/2026 - 04:14 PM Learn about SEC filing dates

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).

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^*

Stern Sadie

(Last) (First) (Middle)

6340 SEQUENCE DRIVE

(Street)

SAN DIEGO CALIFORNIA 92121

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP Chief People & Culture Off

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/22/2026

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

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

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

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	08/22/2026		F		1,451(1)	D	$92.34	128,608(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. Represents the number of shares required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of restricted stock units and does not represent a sale by the Reporting Person.

2. Included in this number are 71,903 unvested restricted stock units, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 5,699 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027.

Remarks:

	/s/ Jereme M. Sylvain, as Attorney-in-Fact for Sadie Stern	08/25/2026
	** 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.
* Form 4: SEC 1474 (03-26)