Tecogen Inc.

TGEN·AMEX·$6.05Share Price as of 11/2·$181MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/13/26 10-QQ1 ended 03/31/2605/13/26 10-KFY 202503/19/26 10-QQ3 ended 09/30/2511/13/25 10-QQ2 ended 06/30/2508/13/25

Disclosures

8-KCurrent report10/14/26 8-KCurrent report08/31/26 8-KCurrent report08/12/26 8-KCurrent report07/01/26 8-KCurrent report06/05/26

Prospectuses and Registrations

424B3Prospectus09/04/26 POS AMPost-effective amendment09/01/26 S-1/ARegistration statement (amended)08/31/26 S-3Shelf registration08/31/26 424B4Prospectus07/21/25

Proxies

DEF 14ADefinitive proxy04/21/26 DEF 14ADefinitive proxy04/29/25 DEF 14ADefinitive proxy04/23/24 PRE 14APreliminary proxy04/12/24 DEF 14ADefinitive proxy04/25/23

Ownership

4/AInsider transaction (amended)09/08/26 4/AInsider transaction (amended)09/08/26 4/AInsider transaction (amended)09/08/26 4/AInsider transaction (amended)09/08/26 4/AInsider transaction (amended)09/08/26

Other

EFFECTRequest for effectiveness09/03/26 EFFECTRequest for effectiveness09/01/26 EFFECTRequest for effectiveness07/17/25 CORRESPCorrespondence with the SEC07/15/25 CORRESPCorrespondence with the SEC07/15/25