EdgarLookup

TECOGEN INC. — S-1/A Filings

19 S-1/A filings on record

This page lists all S-1/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 19 S-1/A documents 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
S-1/A S-1/A 0001537435-25-000086 Jul 16, 2025
S-1/A S-1/A 0001537435-25-000083 Jul 16, 2025
S-1/A S-1/A 0001537435-25-000081 Jul 16, 2025
S-1/A S-1/A 0001537435-14-000052 Jun 27, 2014
S-1/A S-1/A 0001537435-14-000049 Jun 20, 2014
S-1/A S-1/A 0001537435-14-000043 Jun 16, 2014
S-1/A FORM S-1/A 0001144204-14-024348 Apr 23, 2014
S-1/A FORM S-1/A 0001144204-14-023335 Apr 17, 2014
S-1/A S-1/A 0001144204-13-053324 Oct 1, 2013
S-1/A AMENDMENT TO FORM S-1 0001144204-13-053149 Sep 30, 2013
S-1/A S-1/A 0001144204-13-048964 Sep 3, 2013
S-1/A S-1/A 0001537435-13-000021 Feb 14, 2013
S-1/A S-1/A 0001537435-13-000016 Feb 11, 2013
S-1/A S-1/A 0001537435-13-000010 Feb 5, 2013
S-1/A S-1/A 0001537435-13-000004 Jan 15, 2013
S-1/A S-1/A 0001537435-12-000003 Dec 21, 2012
S-1/A AMENDMENT NO. 3 0001144204-12-054270 Oct 2, 2012
S-1/A FORM S-1/A 0001144204-12-040196 Jul 19, 2012
S-1/A AMENDMENT TO FORM S-1 0001144204-12-024413 Apr 27, 2012