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TECOGEN INC. — SCHEDULE 13G/A Filings

1 SCHEDULE 13G/A filing on record

This page lists all SCHEDULE 13G/A filings submitted to the SEC by TECOGEN INC. (TGEN), sorted by most recent first. Each row links to the full filing on EdgarLookup. TECOGEN INC. has filed 1 SCHEDULE 13G/A document with the SEC since 2011. To view all SEC filings by TECOGEN INC., see the full filings list.

Overview All Filings Financials Insiders
All 10-K 10-K/A 10-Q 25 3 3/A 4 4/A 424B3 424B4 425 5 8-A12B 8-A12G 8-K 8-K/A AW CERT CERTNAS CORRESP CT ORDER D DEF 14A DEF 14C DEFA14A DRS EFFECT POS AM PRE 14A PRE 14C RW S-1 S-1/A S-1MEF S-3 S-3/A S-4 S-4/A S-8 S-8 POS SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13G/A UPLOAD
Form Description Accession Number Filed Period
SCHEDULE 13G/A — 0000905148-25-002985 Aug 14, 2025 —