Abinand Rangesh

Insider Reports History

Reporting-owner location: N. Billerica, MA
Latest reporting-owner signature: /s/ Abinand Rangesh
Source: Latest parsed Forms 3/4/5 signature
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Abinand Rangesh

Form 4 holding Chief Executive Officer, Director, Chief Financial Officer

TECOGEN INC.

Security class: Stock Option (Right to Buy)
Shares / value: 26,041
Estimated value: $2,556,127
Report date: 26 Jun 2026
Price: $8.35
Ownership: Direct
Underlying class: Common Stock
Underlying amount

Form 4 holding Chief Executive Officer, Director, Chief Financial Officer

TECOGEN INC.

Security class: Common Stock
Shares / value: 174,081
Estimated value: $445,647
Report date: 26 Jun 2026
Price: $2.56
Ownership: Direct

Insider Reports Filed by Abinand Rangesh

4 TGEN

TECOGEN INC.

Report period: 26 Jun 2026
Transactions: 2
Transaction value: $0
Accepted by SEC: 30 Jun 2026, 20:34
Role: Chief Executive Officer, Director, Chief Financial Officer
Next action: Open filing details

4 TGEN

TECOGEN INC.

Report period: 20 Mar 2026
Transactions: 1
Transaction value: +$6,894
Accepted by SEC: 23 Mar 2026, 14:33
Role: Chief Executive Officer, Director, Chief Financial Officer
Next action: Open filing details

4 TGEN

TECOGEN INC.

Report period: 24 Jul 2025
Transactions: 3
Transaction value: +$301,627
Accepted by SEC: 28 Jul 2025, 11:04
Role: Chief Executive Officer, Director, Chief Financial Officer
Next action: Open filing details

4 TGEN

TECOGEN INC.

Report period: 20 Sep 2023
Transactions: 1
Transaction value: +$123,200
Accepted by SEC: 27 Sep 2023, 13:07
Role: Chief Executive Officer, Director, Chief Financial Officer
Next action: Open filing details

4 TGEN

TECOGEN INC.

Report period: 15 Aug 2023
Transactions: 3
Transaction value: +$1,021
Accepted by SEC: 01 Sep 2023, 17:05
Role: Chief Executive Officer, Director, Chief Financial Officer
Next action: Open filing details

4 TGEN

TECOGEN INC.

Report period: 20 Jun 2023
Transactions: 1
Transaction value: +$1,560
Accepted by SEC: 20 Jun 2023, 16:15
Role: Chief Executive Officer, Director, Chief Financial Officer
Next action: Open filing details

4 TGEN

TECOGEN INC.

Report period: 20 Mar 2023
Transactions: 2
Transaction value: +$1,576
Accepted by SEC: 27 Mar 2023, 11:33
Role: Chief Executive Officer, Director, Chief Financial Officer
Next action: Open filing details

3/A TGEN

TECOGEN INC.

Report period: 16 Mar 2022
Transactions: 0
Transaction value: $0
Accepted by SEC: 06 May 2022, 16:59
Role: Chief Financial Officer, Director
Next action: Open filing details

3 TGEN

TECOGEN INC.

Report period: 09 Mar 2022
Transactions: 0
Transaction value: $0
Accepted by SEC: 16 Mar 2022, 11:11
Role: Chief Financial Officer, Director
Next action: Open filing details

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. to update or revoke optional consent for future visits. For more information, see our Privacy Policy .