TECOGEN INC. reports

Company Names, identifiers, and filing context for this profile. 1 identity field
Company location
North Billerica, MA
SEC filing record 1 source field available
Fiscal year end
31 December
TECOGEN INC. has filed 673 SEC EDGAR filings since 22 Dec 2011

SEC filing history

Showing 51-75 of 673 matching filings.

Per page
25
Current page
3
S-1MEF File 333-288740

S-1MEF

Filing date
17 Jul 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
S-1/A File 333-288668

S-1/A

Filing date
16 Jul 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
S-1/A File 333-288668

S-1/A

Filing date
16 Jul 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
S-1/A File 333-288668

S-1/A

Filing date
16 Jul 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
CORRESP

CORRESP filing

Filing date
15 Jul 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
CORRESP

CORRESP filing

Filing date
15 Jul 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
S-1 File 333-288668

S-1

Filing date
15 Jul 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
4/A

FORM 4/A

Filing date
14 Jul 2025
Reporting date
03 Jun 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
4/A

FORM 4/A

Filing date
14 Jul 2025
Reporting date
27 May 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
UPLOAD File 377-08143

UPLOAD filing

Filing date
01 Jul 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
DRS File 377-08143

DRS filing

Filing date
26 Jun 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
4

FORM 4

Filing date
24 Jun 2025
Reporting date
03 Mar 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
3

FORM 3

Filing date
24 Jun 2025
Reporting date
23 Apr 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
3

FORM 3

Filing date
24 Jun 2025
Reporting date
23 Apr 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4

FORM 4

Filing date
20 Jun 2025
Reporting date
16 Jun 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
4

FORM 4

Filing date
02 Jun 2025
Reporting date
27 May 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
424B3 File 333-265799

424B3

Filing date
22 May 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
424B3 File 333-187928

424B3

Filing date
22 May 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
4

FORM 4

Filing date
07 May 2025
Reporting date
06 May 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
CERT File 001-36103

NYSE AMERICAN CERTIFICATION

Filing date
05 May 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
8-A12B File 001-36103

8-A12B

Filing date
05 May 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
4

FORM 4

Filing date
05 May 2025
Reporting date
01 May 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Manage preferences to update or revoke optional consent for future visits. For more information, see our Privacy Policy .