Dexcom EVP sells $143K in stock under 10b5-1 plan

Rhea-AI Filing Summary

DEXCOM INC (DXCM) executive Michael Jon Brown, EVP and Chief Legal Compliance Officer, reported selling 1,700 shares of common stock on September 15, 2026 at $84.04 per share in an open-market or private transaction made pursuant to a Rule 10b5-1 trading plan adopted on November 26, 2025.

Following this sale, Brown directly holds 99,885 shares, which includes 71,903 unvested restricted stock units scheduled to vest between March 8, 2027 and March 8, 2029, and 83 shares acquired under Dexcom’s Amended and Restated 2015 Employee Stock Purchase Plan.

Insider Trade Summary 10b5-1

Net Seller: 1,700 shares

Net Sell 1 txn

Insider Brown Michael Jon

Role EVP Chief Legal Compliance Off

Sold 1,700 shs ($143K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	1,700	$84.04	$143K

Holdings After Transaction: Common Stock — 99,885 shares (Direct)

Footnotes (2)

1. F1. On November 26, 2025, Mr. Brown adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Brown. The shares set forth above were sold pursuant to the 10b5- 1 Plan.
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, 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027, and 83 additional shares acquired under the Issuer's Amended and Restated 2015 Employee Stock Purchase Plan.

Key Figures

Shares sold: 1,700 shares Sale price per share: $84.04 per share Implied transaction value: $142,868 +3 more

6 metrics

Shares sold 1,700 shares Non-derivative sale on September 15, 2026 by EVP and Chief Legal Compliance Officer

Sale price per share $84.04 per share Price for the 1,700 Dexcom common shares sold on September 15, 2026

Implied transaction value $142,868 1,700 shares sold at $84.04 per share

Shares held after transaction 99,885 shares Direct Dexcom common stock holdings of Michael Jon Brown after the sale

Unvested restricted stock units 71,903 RSUs Unvested RSUs included in Brown’s post-transaction holdings, vesting through March 8, 2029

ESPP shares held 83 shares Shares acquired under Dexcom’s Amended and Restated 2015 Employee Stock Purchase Plan

Key Terms

Rule 10b5-1 Plan, restricted stock units, Employee Stock Purchase Plan

3 terms

Rule 10b5-1 Plan regulatory

"Mr. Brown adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition"

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

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.

Employee Stock Purchase Plan financial

"83 additional shares acquired under the Issuer's Amended and Restated 2015 Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Dexcom (DXCM) report for Michael Jon Brown?

Dexcom reported that Michael Jon Brown, EVP and Chief Legal Compliance Officer, sold 1,700 shares of common stock on September 15, 2026 at $84.04 per share in a sale classified as an open-market or private transaction.

Was the DXCM insider sale made under a Rule 10b5-1 trading plan?

Yes. The filing states that Brown adopted a Rule 10b5-1 Plan on November 26, 2025, which allows orderly disposition of his shares, and that the 1,700 shares sold on September 15, 2026 were sold pursuant to this 10b5-1 Plan.

How many Dexcom (DXCM) shares does Michael Jon Brown hold after the sale?

After the reported sale, Brown directly holds 99,885 shares of Dexcom common stock. This total includes 71,903 unvested restricted stock units and 83 shares acquired under Dexcom’s Amended and Restated 2015 Employee Stock Purchase Plan.

What is the value of the Dexcom (DXCM) shares sold by Michael Jon Brown?

Brown sold 1,700 shares at $84.04 per share, for an implied transaction value of approximately $142,868. The sale is reported as a non-derivative transaction in Dexcom common stock on September 15, 2026.

What unvested RSUs does Michael Jon Brown have in Dexcom (DXCM)?

Brown’s post-transaction holdings include 71,903 unvested restricted stock units, consisting of grants made on March 8, 2026, March 8, 2025, and March 8, 2024, scheduled to vest through March 8, 2029 according to the detailed vesting schedule.

What portion of Michael Jon Brown’s Dexcom (DXCM) holdings comes from the employee stock purchase plan?

Within Brown’s 99,885 shares of Dexcom common stock held after the sale, the filing specifies that 83 shares were acquired under Dexcom’s Amended and Restated 2015 Employee Stock Purchase Plan.

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

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Available on EDGAR 09/16/2026 - 04:26 PM Accepted by SEC EDGAR 09/16/2026 - 04:25 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).

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^*

Brown Michael Jon

(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 Legal Compliance Off

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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	09/15/2026		S		1,700(1)	D	$84.04	99,885(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 November 26, 2025, Mr. Brown adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Mr. Brown. The shares set forth above were sold pursuant to the 10b5- 1 Plan.

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, 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027, and 83 additional shares acquired under the Issuer's Amended and Restated 2015 Employee Stock Purchase Plan.

Remarks:

	/s/ Jereme M. Sylvain, as Attorney-in-Fact for Michael Jon Brown	09/16/2026
	** 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)