Dexcom officer proposes sale of 2,565 shares

The listed shares are identified as restricted stock acquired from Dexcom on March 8, 2024.

Rhea-AI Filing Summary

Dexcom officer Sadie Stern gave notice of a proposed sale of 2,565 common shares, with an aggregate market value of $220,974.75 and an approximate sale date of September 28, 2026. Morgan Stanley Smith Barney LLC is listed as the broker. The shares are identified as restricted stock acquired from Dexcom on March 8, 2024. The notice also reports Stern sold 2,565 common shares on August 27, 2026, with an aggregate market value of $226,669.05.

Key Figures

Proposed shares: 2,565 common shares Aggregate market value: $220,974.75 Approximate sale date: September 28, 2026 +2 more

5 metrics

Proposed shares 2,565 common shares Proposed sale

Aggregate market value $220,974.75 Proposed sale

Approximate sale date September 28, 2026 Proposed sale

Prior three-month sale 2,565 common shares Sale reported for August 27, 2026

Prior sale aggregate market value $226,669.05 Sale reported for August 27, 2026

Key Terms

Restricted Stock, Rule 144, aggregate market value

3 terms

Restricted Stock financial

"Restricted Stock acquired from issuer"

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.

Rule 144 regulatory

"sales required by paragraph (e) of Rule 144 to be aggregated"

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.

aggregate market value financial

"aggregate market value"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

How many DXCM shares does Sadie Stern propose to sell?

Sadie Stern's notice covers a proposed sale of 2,565 Dexcom common shares, with an aggregate market value of $220,974.75 and an approximate sale date of September 28, 2026. Morgan Stanley Smith Barney LLC is listed as the broker.

How did Sadie Stern acquire the DXCM shares listed for sale?

The shares are listed as restricted stock acquired from Dexcom on March 8, 2024.

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

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Available on EDGAR 09/28/2026 - 04:13 PM Accepted by SEC EDGAR 09/28/2026 - 04:12 PM 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	0001797971
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	SADIE STERN
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	2565	220974.75	377360765	09/28/2026	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	03/08/2024	Restricted Stock	ISSUER			2565	03/08/2024	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
SADIE STERN 6340 Sequence Drive San Diego CA 92121	Common	08/27/2026	2565	226669.05

144: Remarks and Signature

Remarks
Date of Notice	09/28/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/28/2026
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/ Sadie Stern
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)