SCHEDULE: Tecogen Stake Update: Natsis & Pantopoulou Hold 1.8%

Tryfon Natsis and Despoina Pantopoulou disclose a 1.8% beneficial ownership stake in Tecogen Inc. common stock.

Summary

• Tryfon Natsis and Despoina Pantopoulou, as Joint Tenants with the Right of Survivorship, are the reporting persons.
• The filing pertains to Common Stock, $0.001 par value, of Tecogen Inc.
• The reporting persons beneficially own 460,300 shares of Tecogen Inc. common stock.
• This ownership represents 1.8% of the class.
• The percentage is calculated based on 25,269,362 shares of Tecogen Inc. common stock outstanding as of May 20, 2025, as reported in Tecogen Inc.'s prospectus on Form 424B3 filed on May 22, 2025.
• The reporting persons have shared voting power and shared dispositive power over all 460,300 shares.
• The securities were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer.

Sentiment

Score: 5

Explanation: The filing is a routine disclosure of a passive ownership stake, providing factual information without indicating positive or negative operational or financial performance.

Positives

• Disclosure of a significant, passive ownership stake by individuals, indicating continued investor interest in Tecogen Inc.
• The reporting persons explicitly state the shares are not held for the purpose of changing or influencing control, suggesting stability regarding this stake.

Negatives

• No direct negative implications for the company's operations or financial health are indicated by this passive ownership disclosure.

Risks

• The filing itself does not detail company-specific operational or financial risks.
• The reporting persons certify that the securities were not acquired or held for the purpose of changing or influencing control of the issuer, mitigating the risk of an activist campaign or hostile takeover from this specific stake.

Future Outlook

This Schedule 13G filing is a disclosure of beneficial ownership and does not contain any forward-looking statements or guidance regarding Tecogen Inc.'s future outlook.

Industry Context

This filing is a routine disclosure of a passive ownership stake and does not provide information related to broader industry trends or competitors.

Stakeholder Impact

• Shareholders: Provides transparency regarding a significant passive ownership stake in the company.

Key Dates

Keywords

Tecogen Inc., Common Stock, Schedule 13G, Beneficial Ownership, Shareholder, SEC Filing, Passive Investment