Dexcom officer Michael Brown proposes $145K share sale

The shares are identified as restricted stock acquired from Dexcom on March 8, 2026, alongside two earlier sales of 1,700 shares.

Rhea-AI Filing Summary

Dexcom, Inc. (DXCM) officer Michael Brown filed notice of a proposed sale of 1,700 common shares, with an aggregate market value of $145,316, listing Morgan Stanley Smith Barney LLC and October 15, 2026 as the approximate sale date. The shares are identified as restricted stock acquired from the issuer on March 8, 2026. The notice lists prior sales of 1,700 shares on September 15, 2026, for $142,868, and 1,700 shares on August 14, 2026, for $156,281. The signature appears as Michael Jon Brown.

Key Figures

Proposed sale: 1,700 shares Aggregate market value of proposed sale: $145,316 Shares outstanding: 377,360,765 shares +4 more

7 metrics

Proposed sale 1,700 shares Approximate sale date: October 15, 2026

Aggregate market value of proposed sale $145,316 Proposed sale

Shares outstanding 377,360,765 shares Issuer share count listed in the notice

Prior sale 1,700 shares September 15, 2026

Aggregate market value of prior sale $142,868 September 15, 2026

Prior sale 1,700 shares August 14, 2026

Aggregate market value of prior sale $156,281 August 14, 2026

Key Terms

Rule 144, Restricted Stock, Issuer

3 terms

Rule 144 regulatory

"definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock financial

"Restricted Stock"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Issuer regulatory

"ISSUER"

FAQ

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

How many DXCM shares did Michael Brown propose to sell?

Michael Brown, listed as an officer, gave notice of a proposed sale of 1,700 Dexcom common shares with an aggregate market value of $145,316. The notice lists Morgan Stanley Smith Barney LLC and October 15, 2026 as the approximate sale date.

What DXCM shares had Michael Brown sold in the prior three months?

The notice lists sales of 1,700 shares on September 15, 2026, with an aggregate market value of $142,868, and 1,700 shares on August 14, 2026, with an aggregate market value of $156,281.

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

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Available on EDGAR 10/15/2026 - 04:02 PM EDT Accepted by SEC EDGAR 10/15/2026 - 04:02 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001899922
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	DEXCOM, INC.
SEC File Number	000-51222
Address of Issuer	6340 Sequence Drive San Diego CALIFORNIA 92121
Phone	(858) 200-0200
Name of Person for Whose Account the Securities are To Be Sold	MICHAEL BROWN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1700	145316.00	377360765	10/15/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/08/2026	Restricted Stock	ISSUER			1700	03/08/2026	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
MICHAEL BROWN 6340 Sequence Drive San Diego CA 92121	Common	09/15/2026	1700	142868.00
MICHAEL BROWN 6340 Sequence Drive San Diego CA 92121	Common	08/14/2026	1700	156281.00

144: Remarks and Signature

Remarks
Date of Notice	10/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/26/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Michael Jon Brown
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)