DEXCOM INC

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

Commission File Number:000-51222

DEXCOM, INC.

(Exact name of registrant as specified in its charter)

(858)200-0200

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No☒

As of October 22, 2026, there were 372,950,922 shares of the registrant’s common stock outstanding.

DexCom, Inc.

Table of Contents

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Except for historical financial information contained herein, the matters discussed in this Quarterly Report on Form 10-Q may be considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act, and subject to the safe harbor created by the Private Securities Litigation Reform Act of 1995. Such statements include declarations regarding our operations, financial condition and prospects, and business strategies, and are based on management’s intent, beliefs, expectations, and assumptions as of the date of this report. Investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve a number of risks, uncertainties and other factors, some of which are beyond our control. Actual results could differ materially from those indicated or implied by such forward-looking statements. Important factors that could cause actual results to differ materially from those indicated by such forward-looking statements include, but are not limited to: (i) that the information is of a preliminary nature and may be subject to further adjustment; (ii) those risks and uncertainties identified under “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the Securities and Exchange Commission, or the SEC, on February 12, 2026, together with any updates identified under “Risk Factors” in our subsequently filed Quarterly Reports on Form 10-Q; and (iii) the other risks detailed from time-to-time in our other reports and registration statements filed with the SEC. Except as required by law, we undertake no obligation to revise or update publicly any forward-looking statements, whether as a result of new information, future events or otherwise.

AVAILABLE INFORMATION

Our website address is located at www.dexcom.com and our investor relations website is located at investors.dexcom.com. We file electronically with the SEC our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and other reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act. We make available on our website, free of charge, copies of these reports and other information as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. Information that is based on estimates, forecasts, projections, market research or similar methodologies is inherently subject to uncertainties and actual events or circumstances may differ materially from events and circumstances reflected in this information. Unless otherwise expressly stated, we obtained industry, business, market, and other data from reports, research surveys, studies, and similar data prepared by market research firms and other third parties, industry, medical and general publications, government data, and similar sources.

We announce material information to the public about us, our products, and other matters through a variety of means, including filings with the SEC, press releases, public conference calls, presentations, webcasts, and our investor relations website, in order to achieve broad, non-exclusionary distribution of information to the public and to comply with our disclosure obligations under Regulation FD. We also routinely post important information for investors on our website noted above, and we may use this website as a means of disclosing material, non-public information and for complying with our disclosure obligations under Regulation FD. Accordingly, investors should monitor the Investor Relations portion of our website noted above. The information disclosed by the foregoing channels could be deemed to be material information. As such, we encourage investors, the media, and others to follow the channels listed above and review the information disclosed through such channels.

Except as expressly set forth in this Quarterly Report on Form 10-Q, the contents of our website and our investor relations website are not incorporated by reference into, or otherwise to be regarded as part of, this Quarterly Report on Form 10-Q or any other report or document we file with the SEC, and any references to websites are intended to be inactive textual references only.

“Dexcom”, “Dexcom Clarity”, “Dexcom Follow”, “Dexcom One”, “Dexcom One+”, “Dexcom Share”, “Stelo”, and any related logos and design marks appearing in this Quarterly Report on Form 10-Q are either registered trademarks or trademarks of DexCom, Inc. in the United States and/or other countries. Other service marks, trademarks and trade names referred to in this Quarterly Report on Form 10-Q are the property of their respective owners.

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS