Ads-Tec Energy Public Ltd Co

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 20-F

☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended

December 31,2025

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of event requiring this shell company report ________________

For the transition period from _________ to ___________

Commission File No.001-41188

ADS-TEC ENERGY PUBLIC LIMITED COMPANY

(Exact name of Registrant as specified in its charter)

Not applicable

(Translation of Registrant’s name into English)

Ireland

(Jurisdiction of incorporation or organization)

10 Earlsfort Terrace

Dublin 2, D02 T380, Ireland

(Address of principal executive offices)

Thomas Speidel, Chief Executive Officer

10 Earlsfort Terrace

Dublin 2, D02 T380, Ireland

Tel:+353 1 920 1000

(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person)

Securities registered or to be registered pursuant to Section 12(b) of the Act.

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

None

(Title of Class)

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act

None

(Title of Class)

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report:

60,436,227 Ordinary Shares, nominal value $0.0001 per share as of December 31, 2025

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes ☐No ☒

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

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, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended 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 which basis of accounting the registrant has used to prepare the financial statements included in this filing:

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.

Item 17 ☐ Item 18 ☐

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ☐ No☒

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FREQUENTLY USED TERMS

Unless otherwise stated in this Annual Report on Form 20-F (this “Annual Report”) or the context otherwise requires, references to:

“ADSE” means collectively ads-tec Energy PLC, ads-tec Energy GmbH, and all subsidiaries of ads-tec Energy GmbH.

“ADSE GM” means ads-tec Energy GmbH, a wholly-owned subsidiary of ADSE Holdco, based in Nürtingen, Germany and entered in the commercial register of the Stuttgart Local Court under HRB 762810.

“ADSE Holdco” or “Company” means ADS-TEC Energy PLC, an Irish public limited company duly incorporated under the laws of Ireland.

“ADSE US” means ads-tec Energy, Inc., a Delaware corporation and wholly-owned subsidiary of ADSE GM.

“ADSH” means ads-tec Holding GmbH, based in Nürtingen, Germany and entered in the commercial register of the Stuttgart Local Court under HRB 224527.

“August 2024 Warrants” means the redeemable warrants representing the right to purchase 4,800,002 Ordinary Shares, at an exercise price of $6.20 per Ordinary Share, issued on August 26, 2024.

“Business Combination Transactions” means the transactions contemplated by the Business Combination Agreement, dated as of August 10, 2021, by and among European Sustainable Growth Acquisition Corp., ADSE Holdco, EUSG II Corporation, Bosch Thermotechnik GmbH, ADSH and ADSE GM.

“Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended.

“Irish Companies Act” means the Companies Act 2014, all enactments which are to be read as one with, or construed or read together as one with, the Companies Act 2014.

“IFRS” means International Financial Reporting Standards as issued by the International Accounting Standards Board.

“Incentive Plan” means ADS-TEC Energy PLC’s 2021 Omnibus Incentive Plan.

“JOBS Act” means the Jumpstart Our Business Startups Act of 2012, as amended.

“May 2023 Warrants” means the redeemable warrants to purchase 1,716,667 Ordinary Shares, at an exercise price of $3.00 per Ordinary Share, issued on May 5, 2023.

“Listed Warrants” means warrants to purchase one Ordinary Share at a price of $11.50 per share listed on Nasdaq under the symbol “ADSEW”.

“Ordinary Shares” means the ordinary shares, with $0.0001 par value per share, of ADSE Holdco.

“Securities Act” means the U.S. Securities Act of 1933, as amended.

“Warrants” means the Ordinary Shares purchase warrants issued by the Company in connection with financing transactions or other contractual arrangements, other than the Listed Warrants.

*“$”, “US$” and “U.S. dollar”*means the United States dollar.

“€”, “EUR” and “Euro”means the Euro.

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PRESENTATION OF FINANCIAL AND OTHER INFORMATION

In this Annual Report, unless otherwise indicated, all references to (i) the “Company,” “we,” “our,” or “us” refer solely to ADS-TEC Energy PLC, (ii) “ADSE” refers to ADS-TEC Energy PLC, ads-tec Energy GmbH and all of its subsidiaries, collectively, and (iii) “ADSE GM” refer solely to ads-tec Energy GmbH, a German limited liability company. ADS-TEC Energy PLC is an Irish public limited company duly incorporated under the laws of Ireland on July 26, 2021.** **

Financial Information

This Annual Report contains our audited consolidated financial statements as of and for the periods ended December 31, 2025, 2024 and 2023 (our “audited consolidated financial statements”). The Company qualifies as a foreign private issuer as defined under Rule 405 under the Securities Act and prepares its financial statements denominated in euros (“EUR” or “€”) and in accordance with International Financial Reporting Standards as adopted by the International Accounting Standards Board (“IFRS”).

Industry and Market Data

In this Annual Report, we present industry data, information and statistics regarding the markets in which the Company competes as well as publicly available information, industry and general publications and research and studies conducted by third parties. This information is supplemented where necessary with the Company’s own internal estimates and information obtained from discussions with its customers, taking into account publicly available information about other industry participants and the Company’s management’s judgment where information is not publicly available.

Industry publications, research, studies and forecasts generally state that the information they contain has been obtained from sources believed to be reliable, but that the accuracy and completeness of such information is not guaranteed. Forecasts and other forward-looking information obtained from these sources are subject to the same qualifications and uncertainties as the other forward-looking statements in this Annual Report. These forecasts and forward-looking information are subject to uncertainty and risk due to a variety of factors, including those described under “Item 3. Key Information - D. Risk Factors.” These and other factors could cause results to differ materially from those expressed in any forecasts or estimates.

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CAUTIONARY NOTE Regarding FORWARD-LOOKING STATEMENTS

This Annual Report contains certain “forward-looking statements” as defined in Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”) that involve significant risks and uncertainties. All statements other than statements of historical facts are forward-looking statements. These forward-looking statements include information about our possible or assumed future results of operations or our performance. Words such as “expects,” “intends,” “plans,” “believes,” “anticipates,” “estimates,” and variations of such words and similar expressions are intended to identify the forward-looking statements.

The risk factors and cautionary language referred to or incorporated by reference in this Annual Report provide examples of risks, uncertainties and events that may cause actual results to differ materially from the expectations described in our forward-looking statements, including, but not limited to, those items identified under “Item 3. Key Information - D. Risk Factors”.

Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this Annual Report. Although we believe that the expectations reflected in such forward-looking statements are reasonable, there can be no assurance that such expectations will prove to be correct. These statements involve known and unknown risks and are based upon a number of assumptions and estimates which are inherently subject to significant uncertainties and contingencies, many of which are beyond our control. Actual results may differ materially from those expressed or implied by such forward-looking statements. We undertake no obligation to publicly update or revise any forward-looking statements contained in this Annual Report, or the documents to which we refer readers in this Annual Report, to reflect any change in our expectations with respect to such statements or any change in events, conditions or circumstances upon which any statement is based.

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