There have been 50 recent insider transactions recorded for Tecogen Inc. (TGEN), including 37 buys and 12 sells. Total insider buying was valued at $2.11M and total insider selling at $1.09M.
Notable insiders with recent activity include Lewis Earl, Hirsch Susan B, Whiting John Kimball Iv. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — TGEN
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-03-27 |
Lewis Earl |
Director |
Informative Buy |
5,000 |
$2.52 |
$12.6K |
1,011,006 |
| 2026-03-27 |
Hirsch Susan B |
Director |
Informative Buy |
10,000 |
$2.54 |
$25.4K |
260,416 |
| 2026-03-26 |
Lewis Earl |
Director |
Informative Buy |
5,000 |
$2.88 |
$14.41K |
1,006,006 |
| 2026-03-23 |
Whiting John Kimball Iv |
General Counsel & Secretary |
Informative Buy |
10,000 |
$2.38 |
$23.8K |
22,612 |
| 2026-03-20 |
Hatsopoulos John |
Director |
Option Exercise (Sell) |
50,000 |
$0.88 |
$44K |
- |
| 2026-03-20 |
Deschenes Roger P. |
CAO |
Informative Buy |
10,000 |
$2.23 |
$22.3K |
52,962 |
| 2026-03-20 |
Rangesh Abinand |
Officer, Other: Chief Executive Officer |
Informative Buy |
3,000 |
$2.30 |
$6.89K |
67,193 |
| 2025-07-24 |
Albertine John M |
Director |
RSU Award |
25,000 |
$8.35 |
$208.75K |
175,000 |
| 2025-07-24 |
Lewis Earl R |
Director |
RSU Award |
25,000 |
$8.35 |
$208.75K |
91,250 |
| 2025-07-24 |
Deschenes Roger P. |
CAO |
RSU Award |
17,964 |
- |
- |
42,962 |
| 2025-07-24 |
Ghoniem Ahmed |
Director |
RSU Award |
25,000 |
$8.35 |
$208.75K |
237,723 |
| 2025-07-24 |
Galiteva Angelina |
Director |
RSU Award |
25,000 |
$8.35 |
$208.75K |
225,000 |
| 2025-07-24 |
Whiting John Kimball Iv |
General Counsel & Secretary |
RSU Award |
11,976 |
- |
- |
12,612 |
| 2025-07-24 |
Hirsch Susan B |
Director |
RSU Award |
25,000 |
$8.35 |
$208.75K |
150,000 |
| 2025-07-24 |
Rangesh Abinand |
Officer, Other: Chief Executive Officer |
RSU Award |
53,892 |
- |
- |
64,193 |
| 2025-07-24 |
Lafaille Stephen |
VP of Business Development |
RSU Award |
11,976 |
- |
- |
12,376 |
| 2025-06-24 |
Panora Robert A |
COO and President |
Informative Sell |
900 |
$6.86 |
$6.17K |
62,523 |
| 2025-06-23 |
Lafaille Stephen |
VP of Business Development |
Informative Sell |
10,000 |
$7.25 |
$72.5K |
400 |
| 2025-06-23 |
Panora Robert A |
COO and President |
Informative Sell |
31,800 |
$6.36 |
$202.25K |
63,423 |
| 2025-06-18 |
Panora Robert A |
COO and President |
Informative Sell |
13,000 |
$5.03 |
$65.39K |
95,223 |
| 2025-06-16 |
Panora Robert A |
COO and President |
Option Exercise (ITM) |
12,723 |
$0.79 |
$10.05K |
82,723 |
| 2025-06-16 |
Panora Robert A |
COO and President |
Option Exercise (Sell) |
52,500 |
$1.10 |
$57.75K |
- |
| 2025-06-06 |
Lafaille Stephen |
VP of Business Development |
Informative Sell |
25,000 |
$5.98 |
$149.5K |
400 |
| 2025-06-04 |
Lafaille Stephen |
VP of Business Development |
Informative Sell |
15,000 |
$5.00 |
$75K |
400 |
| 2025-06-04 |
Panora Robert A |
COO and President |
Informative Sell |
31,000 |
$5.00 |
$155K |
13,000 |
| 2025-06-03 |
Lafaille Stephen |
VP of Business Development |
Informative Sell |
10,000 |
$4.88 |
$48.8K |
400 |
| 2025-06-03 |
Panora Robert A |
COO and President |
Informative Sell |
26,000 |
$4.69 |
$121.94K |
44,000 |
| 2025-05-27 |
Panora Robert A |
COO and President |
Option Exercise (ITM) |
70,000 |
$0.71 |
$49.7K |
130,000 |
| 2025-05-27 |
Panora Robert A |
COO and President |
Option Exercise |
70,000 |
$0.71 |
$49.7K |
70,000 |
| 2025-05-06 |
Lewis Earl R |
Director |
Option Exercise (ITM) |
15,000 |
$1.75 |
$26.25K |
982,256 |
| 2025-05-01 |
Lewis Earl R |
Director |
Other (Buy) |
240,256 |
$2.14 |
$514.15K |
967,256 |
| 2025-03-03 |
Lafaille Stephen |
VP of Business Development |
Informative Buy |
400 |
$2.50 |
$1K |
400 |
| 2024-11-22 |
Lewis Earl R |
Director |
Option Exercise |
100,000 |
$0.71 |
$71K |
100,000 |
| 2024-11-22 |
Lewis Earl R |
Director |
Informative Buy |
100,000 |
$0.71 |
$71K |
737,000 |
| 2024-09-27 |
Hatsopoulos John |
Director |
Informative Buy |
10,000 |
$0.84 |
$8.38K |
988,951 |
| 2024-09-25 |
Hatsopoulos John |
Director |
Informative Buy |
10,000 |
$0.86 |
$8.6K |
978,951 |
| 2024-09-22 |
Hirsch Susan B |
Director |
Disposition |
100,000 |
$0.92 |
$92K |
- |
| 2024-09-20 |
Deschenes Roger P. |
CAO |
Unknown |
37,500 |
$0.88 |
$33K |
- |
| 2024-08-19 |
Hatsopoulos John |
Director |
Informative Buy |
10,000 |
$0.90 |
$8.95K |
968,951 |
| 2024-07-15 |
Lewis Earl R |
Director |
Informative Buy |
10,000 |
$0.68 |
$6.8K |
625,000 |
| 2024-07-15 |
Lewis Earl R |
Director |
Informative Buy |
10,000 |
$0.68 |
$6.8K |
635,000 |
| 2024-07-10 |
Hatsopoulos John |
Director |
Informative Buy |
22,466 |
$0.65 |
$14.6K |
958,951 |
| 2024-06-06 |
Albertine John M |
Director |
RSU Award |
25,000 |
$0.77 |
$19.25K |
150,000 |
| 2024-06-06 |
Lewis Earl R |
Director |
RSU Award |
25,000 |
$0.77 |
$19.25K |
200,000 |
| 2024-06-06 |
Ghoniem Ahmed |
Director |
RSU Award |
25,000 |
$0.77 |
$19.25K |
212,723 |
| 2024-06-06 |
Galiteva Angelina |
Director |
RSU Award |
25,000 |
$0.77 |
$19.25K |
200,000 |
| 2024-06-06 |
Hirsch Susan B |
Director |
RSU Award |
25,000 |
$0.77 |
$19.25K |
125,000 |
| 2024-05-29 |
Hatsopoulos John |
Director |
Informative Buy |
10,000 |
$0.80 |
$8K |
935,220 |
| 2024-05-28 |
Hatsopoulos John |
Director |
Informative Buy |
1,265 |
$0.80 |
$1.01K |
936,485 |
| 2024-05-24 |
Hatsopoulos John |
Director |
Informative Buy |
8,735 |
$0.80 |
$6.99K |
925,220 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
