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.
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 | — |