Tecogen Inc. (TGEN) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, Tecogen's top three insider holders are John Hatsopoulos (Director, 988.95K shares), Susan B Hirsch (Director, 250.42K shares), Robert A Panora (Coo And President, 165.22K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
John Hatsopoulos 1,038,951 0 23 Mar, 2026
Abinand Rangesh Chief Executive Officer 67,193 0 23 Mar, 2026
Roger P. Deschenes Cao 52,962 0 23 Mar, 2026
John Kimball Iv Whiting General Counsel Secretary 22,612 0 23 Mar, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
20 Mar, 2026 Roger P. Deschenes Common Stock A 10,000 $2.23 52,962 D P
20 Mar, 2026 Abinand Rangesh Common Stock A 3,000 $2.30 67,193 D P
23 Mar, 2026 John Kimball Iv Whiting Common Stock A 10,000 $2.38 22,612 D P
20 Mar, 2026 John Hatsopoulos Common Stock A 50,000 $0.88 1,038,951 D M
20 Mar, 2026 John Hatsopoulos Stock Option (Right to Buy) D 50,000 $0.88 0 D M
24 Jul, 2025 John M Albertine Stock Option (Right to Buy) A 25,000 $8.35 175,000 D A
24 Jul, 2025 Roger P. Deschenes Common Stock A 17,964 $0.00 42,962 D A
24 Jul, 2025 John Kimball Iv Whiting Common Stock A 11,976 $0.00 12,612 D A
24 Jul, 2025 Abinand Rangesh Common Stock A 53,892 $0.00 64,193 D A
24 Jul, 2025 Roger P. Deschenes Stock Option (Right to Buy) A 12,063 $8.35 152,063 D A
24 Jul, 2025 John Kimball Iv Whiting Stock Option (Right to Buy) A 24,075 $8.35 424,075 D A
24 Jul, 2025 Abinand Rangesh Stock Option (Right to Buy) A 24,075 $8.35 294,075 D A
24 Jul, 2025 Abinand Rangesh Stock Option (Right to Buy) A 12,048 $8.35 306,123 D A
27 Sep, 2024 John Hatsopoulos Common Stock A 10,000 $0.84 988,951 D P
25 Sep, 2024 John Hatsopoulos Common Stock A 10,000 $0.86 978,951 D P
19 Aug, 2024 John Hatsopoulos Common Stock A 10,000 $0.90 968,951 D P
10 Jul, 2024 John Hatsopoulos Common Stock A 22,466 $0.65 958,951 D P
06 Jun, 2024 John M Albertine Stock Option (Right to Buy) A 25,000 $0.77 150,000 D A
29 May, 2024 John Hatsopoulos Common Stock A 10,000 $0.80 935,220 D P
28 May, 2024 John Hatsopoulos Common Stock A 1,265 $0.80 936,485 D P