Sono Group N.V.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2025

OR

For the transition period from to .

Commission File Number:001-41066

(Exact name of registrant as specified in its charter)

+49 (0)89 4520 5818

(Registrant’s telephone number, including area code)

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

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

None.

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐No ☒

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐No ☒

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 has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

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

The aggregate market value of the ordinary shares of the registrant held by non-affiliates, based on the closing price of the ordinary shares as quoted on the OTCQB on June 30, 2025 (the last business day of the registrant’s most recently completed second fiscal quarter), was approximately $7.2 million.

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.* Yes ☐ No ☐

• As described in more detail in this Annual Report, the registrant was involved in preliminary self-administration proceedings under German insolvency law before the local court of Munich, Germany from mid-May 2023 through January 31, 2024. Since no insolvency plan providing for the distribution of securities was confirmed by the court, the registrant has not checked either of the boxes above.

As of March 25, 2026, there were 1,424,834 ordinary shares, nominal value €0.01 per share, of the registrant outstanding,40,000 high voting shares, nominal value €0.25 per share​​, of the registrant outstanding and 1,401 preferred shares, nominal value €300.00 per share of the registrant outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

None

ANNUAL REPORT ON FORM 10-K

For the Year Ended December 31, 2025

Table of Contents

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K for the fiscal year ended December 31, 2025 (this “Annual Report” or this “Form 10-K”) contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that relate to our current expectations and views of future events. These statements relate to events that involve known and unknown risks, uncertainties and other factors, including those listed under “Risk Factors,” which may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements.

In some cases, these forward-looking statements can be identified by words or phrases such as “believe,” “may,” “will,” “expect,” “estimate,” “could,” “should,” “anticipate,” “aim,” “estimate,” “intend,” “plan,” “believe,” “potential,” “forecast,” “project,” “target,” “continue,” “is/are likely to,” “will” or other similar or comparable expressions (including the negative of any of the foregoing). These forward-looking statements include all matters that are not historical facts and are statements regarding our intentions, beliefs, or current expectations. Forward-looking statements involve inherent known and unknown risks, uncertainties and contingencies because they relate to events and depend on circumstances that may or may not occur in the future and could cause our actual results, performance or achievements to differ materially from those expressed or implied by such forward-looking statements. Forward-looking statements contained in this Annual Report include, but are not limited to, statements about:

We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These forward-looking statements are subject to known and unknown risks, uncertainties and assumptions, many of which are beyond our control. In addition, these forward-looking statements reflect our current views with respect to future events and trends that we believe may affect our financial condition, results of operations, business strategy, short-term and long-term business operations and objectives, and financial needs. These forward-looking statements are neither promises nor guarantees of future performance. We caution you that forward-looking statements are not guarantees of future performance and that our actual results of operations, financial condition and liquidity, and the development of the industries in which we operate may differ materially from those made in or suggested by the forward-looking statements contained in this Annual Report. In addition, even if our results of operations, financial condition and liquidity, and the development of the industries in which we operate are consistent with the forward-looking statements contained in this Annual Report, those results or developments may not be indicative of results or developments in subsequent periods. Actual outcomes may differ materially from the information contained in the forward-looking statements as a result of a number of factors, including, without limitation: the risks, uncertainties, and assumptions described under “Summary Risk Factors” below, “Risk Factors” in Item 1A of Part I, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Item 7 of Part II and elsewhere in this Annual Report.

Any forward-looking statements made herein speak only as of the date of this Annual Report, and you should not rely on forward-looking statements as predictions of future events. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee that the future results, performance, or achievements reflected in the forward-looking statements will be achieved or will occur. Except as required by applicable law, we undertake no obligation to update any of these forward-looking statements for any reason after the date of this Annual Report or to conform these statements to actual results or revised expectations.

GENERAL

During the fiscal year ended December 31, 2025, we conducted our business through our subsidiary Sono Motors GmbH, a German limited liability company (Gesellschaft mit beschränkter Haftung) (the “Subsidiary”). Unless otherwise indicated or the context otherwise requires, the terms “Sono Motors,” “Sono,” “the Companies,” “we,” “our,” “ours,” “ourselves,” “us” or similar terms refer to Sono Group N.V. together with the Subsidiary with respect to the fiscal years ended December 31, 2025 and 2024, and refer to Sono Group N.V. with respect to subsequent events as discussed in Item 1 of this Annual Report and elsewhere in this Annual Report, unless the context requires otherwise. The “Company” refers to Sono Group N.V. and the “Subsidiary” refers to Sono Motors GmbH. References to “Form 10-K” and “Annual Report” herein refer to this Annual Report on Form 10-K for the fiscal year ended December 31, 2025.

We were incorporated pursuant to the laws of the Netherlands as Sono Motors Finance B.V. on October 23, 2020 as a wholly-owned subsidiary of Sono Motors GmbH. As part of the corporate reorganization that was completed on November 27, 2020, our then-existing shareholders contributed all of their shares in Sono Motors GmbH to Sono Motors Finance B.V. in exchange for newly issued common shares of Sono Motors Finance B.V. In addition, the sole issued and outstanding common share in Sono Motors Finance B.V. at that time, which was held by Sono Motors GmbH, was cancelled (ingetrokken). As a result, Sono Motors GmbH became a wholly-owned subsidiary of Sono Motors Finance B.V. and the then-existing shareholders of Sono Motors GmbH became the shareholders of Sono Motors Finance B.V. Also on November 27, 2020, Sono Motors Finance B.V. was converted into a public company with limited liability under Dutch law (naamloze vennootschap), and changed its legal name from Sono Motors Finance B.V. to Sono Group N.V.

We may announce material business and financial information to our investors using our investor relations website at https://ir.sonomotors.com. We therefore encourage investors and others interested in the Company to review the information that we make available on our website, in addition to following our filings with the U.S. Securities and Exchange Commission (“SEC”), webcasts, press releases and conference calls. Information contained on our website is not part of this Annual Report on Form 10-K.

SUMMARY RISK FACTORS

Our business is subject to numerous risks and uncertainties, including those summarized below. This summary does not address all of the risks that we face. Additional discussion of the risks summarized in this risk factor summary, and other risks that we face, can be found below under the headings“Risk Factors”* and*“Management’s Discussion and Analysis of Financial Condition and Results of Operations”* and in the consolidated financial statements and the related notes. If any of the following risks occur, our business, financial condition, results of operations and future growth prospects could be materially and adversely affected. In these circumstances, the market price of our ordinary shares (the*“Ordinary Shares”) could decline. The principal risks and uncertainties affecting our business include the following:

**PART I