Dexcom EVP has 1,451 shares withheld for taxes

Dexcom EVP Chief People & Culture Officer Sadie Stern reported a routine tax-withholding event related to equity compensation.

Rhea-AI Filing Summary

Dexcom EVP Chief People & Culture Officer Sadie Stern reported a routine tax-withholding event related to equity compensation. On the reported date, 1,451 shares of Dexcom common stock were withheld at $71.90 per share to cover tax obligations from the net settlement of restricted stock units.

The footnotes clarify this was not an open-market sale, but shares retained by the company to satisfy required tax withholding and remittance. After this withholding, Stern directly held 130,059 Dexcom shares, including 74,753 unvested restricted stock units that vest on various schedules through March 8, 2029.

Insider Trade Summary

Exercise Price or Tax Liability: 1,451 shares

Exercise Price or Tax Liability 1 txn

Insider Stern Sadie

Role EVP Chief People & Culture Off

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	1,451	$71.90	$104K

Holdings After Transaction: Common Stock — 130,059 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 74,753 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, 8,549 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 taxes: 1,451 shares Withholding price per share: $71.90 per share Shares held after transaction: 130,059 shares +5 more

8 metrics

Shares withheld for taxes 1,451 shares Tax-withholding disposition of common stock

Withholding price per share $71.90 per share Value used for tax-withholding shares

Shares held after transaction 130,059 shares Direct ownership following withholding

Total unvested RSUs 74,753 units Unvested restricted stock units held after transaction

RSUs granted March 8, 2026 39,019 units Vesting through March 8, 2029

RSUs granted March 8, 2025 (1) 19,948 units Vesting through March 8, 2028

RSUs granted March 8, 2025 (2) 8,549 units Vesting through March 8, 2027

RSUs granted March 8, 2024 7,237 units Vesting through March 8, 2027

Key Terms

restricted stock units, net settlement, tax withholding, unvested, +1 more

5 terms

restricted stock units financial

"Included in this number are 74,753 unvested restricted stock units, 39,019 of which were granted on March 8, 2026"

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 represent a sale"

tax withholding financial

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

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

unvested financial

"Included in this number are 74,753 unvested restricted stock units"

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

What insider transaction did Dexcom (DXCM) EVP Sadie Stern report?

Dexcom EVP Sadie Stern reported a tax-withholding transaction where 1,451 common shares were withheld. The shares covered tax obligations from net settlement of restricted stock units and were not sold in the open market.

Was Dexcom (DXCM) EVP Sadie Stern’s Form 4 a stock sale?

No, the Form 4 specifies the 1,451 Dexcom shares were withheld to satisfy tax obligations. The footnote states this withholding does not represent a sale by Sadie Stern in the open market.

How many Dexcom (DXCM) shares does Sadie Stern hold after this transaction?

Following the tax-withholding event, Sadie Stern directly holds 130,059 Dexcom common shares. This total includes both currently held stock and a substantial number of unvested restricted stock units scheduled to vest over several years.

What price per share was used for Dexcom (DXCM) tax withholding?

The tax-withholding disposition used a price of $71.90 per Dexcom share. This price was applied to 1,451 common shares that were withheld to cover tax withholding and remittance obligations related to restricted stock units.

How many unvested Dexcom (DXCM) restricted stock units does Sadie Stern have?

Sadie Stern has 74,753 unvested Dexcom restricted stock units. These include grants made on March 8, 2024, March 8, 2025, and March 8, 2026, which are scheduled to vest in tranches through March 8, 2029.

What are the vesting schedules of Dexcom (DXCM) RSUs held by Sadie Stern?

The 74,753 unvested RSUs vest over multiple dates: 39,019 units from a March 8, 2026 grant vest through March 8, 2029, 19,948 and 8,549 units from 2025 grants vest through 2028 and 2027, and 7,237 units from 2024 vest through 2027.

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

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Accepted by SEC EDGAR 05/27/2026 - 04:39 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)
05/22/2026

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	05/22/2026		F		1,451(1)	D	$71.9	130,059(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 74,753 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, 8,549 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	05/27/2026
	** 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)