Tryfon Natsis - 30 Jun 2025 SCHEDULE 13G/A Report for Tecogen Inc. Common Stock, $0.001 par value (TGEN)

Filing Manager: Tryfon Natsis
Reporting Manager: Tryfon Natsis and Depoina Pantopoulou, as Joint Tenants with the Right of Survivorship
Security: Tecogen Inc. Common Stock, $0.001 par value
Symbol: TGEN
Shares outstanding: 25,572,222 shares
Disclosed Ownership: 460,300 shares
Ownership: 1.8%
Form type: SCHEDULE 13G/A
Filing time: 14 Aug 2025, 17:25:38 UTC
Date of event: 30 Jun 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Tryfon Natsis and Depoina Pantopoulou, as Joint Tenants with the Right of Survivorship	1.8%	460,300	0	460,300	/s/ Tryfon Natsis	Tryfon Natsis, in his capacity as a Joint Tenant with the Right of Survivorship