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TECOGEN INC.

For the period ended Dec 31, 2025. Filed Mar 19, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 19, 2026

TGEN$1.68-5.1%Stored close · as of Nov 10, 2026

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Item 15. Exhibits and Financial Statement Schedules

The following are filed as part of this Annual Report on Form 10-K.

(a)Index to Financial Statements and Financial Statement Schedules

Consolidated Statements of Stockholders' Equity for the years ended December 31, 2025 and 2024

Notes to Audited Consolidated Financial Statements

All other schedules for which provision is made in the applicable accounting regulations of the SEC are not required under the related instructions, or are inapplicable, and therefore have been omitted.

(b)Exhibits

The exhibits are listed in the Exhibit Index attached hereto and incorporated by reference herein.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.