In the last 12 months, insiders at TECOGEN INC. ($TGEN) filed 111 transactions with the SEC: 54 open-market purchases totaling $442,027 and 9 sales totaling $896,552. Net insider sentiment: net selling.
TECOGEN INC. operates in the Air-cond & warm air heatg equip & comm & indl refrig equip industry (Technology sector).
Most Active Insiders
- LEWIS EARL R (Director) — 29 transactions totaling $782,163
- PANORA ROBERT A (COO and President) — 17 transactions totaling $778,607
- Lafaille Stephen (VP of Business Development) — 15 transactions totaling $403,062
- HATSOPOULOS JOHN (Director) — 27 transactions totaling $186,749
- Hatsopoulos John (Director) — 2 transactions totaling $44,001
View all SEC Filings for TECOGEN INC. (TGEN).
Set Up your own filters →Recent Insider Transactions
| Transaction Date | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|
| March 27, 2026 | Hirsch Susan B | Director | P | Common Stock | 10000 | $2.54 | 260,416.0000 | 29,846,479 | 3.99% | 0.03% |
| March 26, 2026 | Lewis Earl | Director | P | Common Stock | 5000 | $2.88 | 1,006,006.0000 | 29,846,479 | 0.50% | 0.02% |
| March 27, 2026 | Lewis Earl | Director | P | Common Stock | 5000 | $2.52 | 1,011,006.0000 | 29,846,479 | 0.50% | 0.02% |
| March 23, 2026 | Whiting John Kimball IV | General Counsel & Secretary | P | Common Stock | 10000 | $2.38 | 22,612.0000 | 29,846,479 | 79.29% | 0.03% |
| March 20, 2026 | Hatsopoulos John | Director | M | Stock Option (Right to Buy) | 50000 | $0.88 | 0.0000 | 29,846,479 | 100.00% | 0.17% |
| March 20, 2026 | Hatsopoulos John | Director | M | Common Stock | 50000 | $0.88 | 1,038,951.0000 | 29,846,479 | 5.06% | 0.17% |
| March 20, 2026 | Rangesh Abinand | Chief Executive Officer | P | Common Stock | 3000 | $2.30 | 67,193.0000 | 29,846,479 | 4.67% | 0.01% |
| March 20, 2026 | Deschenes Roger P. | CAO | P | Common Stock | 10000 | $2.23 | 52,962.0000 | 29,846,479 | 23.28% | 0.03% |
| July 24, 2025 | Rangesh Abinand | Chief Executive Officer | A | Stock Option (Right to Buy) | 24075 | $8.35 | 294,075.0000 | 24,985,261 | 8.92% | 0.10% |
| July 24, 2025 | Rangesh Abinand | Chief Executive Officer | A | Stock Option (Right to Buy) | 12048 | $8.35 | 306,123.0000 | 24,985,261 | 4.10% | 0.05% |
| July 24, 2025 | Hirsch Susan B | Director | A | Stock Option (Right to Buy) | 25000 | $8.35 | 150,000.0000 | 24,985,261 | 20.00% | 0.10% |
| July 24, 2025 | GHONIEM AHMED | Director | A | Stock Option (Right to Buy) | 25000 | $8.35 | 237,723.0000 | 24,985,261 | 11.75% | 0.10% |
| July 24, 2025 | LEWIS EARL R | Director | A | Stock Option (Right to Buy) | 25000 | $8.35 | 91,250.0000 | 24,985,261 | 37.74% | 0.10% |
| July 24, 2025 | GALITEVA ANGELINA | Director | A | Stock Option (Right to Buy) | 25000 | $8.35 | 225,000.0000 | 24,985,261 | 12.50% | 0.10% |
| July 24, 2025 | ALBERTINE JOHN M | Director | A | Stock Option (Right to Buy) | 25000 | $8.35 | 175,000.0000 | 24,985,261 | 16.67% | 0.10% |
| July 24, 2025 | Whiting John Kimball IV | General Counsel & Secretary | A | Common Stock | 11976 | $0.00 | 12,612.0000 | 24,985,261 | 1883.02% | 0.05% |
| July 24, 2025 | Lafaille Stephen | VP of Business Development | A | Stock Option (Right to Buy) | 24075 | $8.35 | 72,937.0000 | 24,985,261 | 49.27% | 0.10% |
| July 24, 2025 | Lafaille Stephen | VP of Business Development | A | Common Stock | 11976 | $0.00 | 12,376.0000 | 24,985,261 | 2994.00% | 0.05% |
| July 24, 2025 | Whiting John Kimball IV | General Counsel & Secretary | A | Stock Option (Right to Buy) | 24075 | $8.35 | 424,075.0000 | 24,985,261 | 6.02% | 0.10% |
| July 24, 2025 | Deschenes Roger P. | CAO | A | Common Stock | 17964 | $0.00 | 42,962.0000 | 24,985,261 | 71.86% | 0.07% |
| July 24, 2025 | Deschenes Roger P. | CAO | A | Stock Option (Right to Buy) | 12063 | $8.35 | 152,063.0000 | 24,985,261 | 8.62% | 0.05% |
| July 24, 2025 | Rangesh Abinand | Chief Executive Officer | A | Common Stock | 53892 | $0.00 | 64,193.0000 | 24,985,261 | 523.17% | 0.22% |
| June 23, 2025 | PANORA ROBERT A | COO and President | S | Common Stock | 31800 | $6.36 | 63,423.0000 | 24,985,261 | 33.40% | 0.13% |
| June 3, 2025 | PANORA ROBERT A | COO and President | S | Common Stock | 26000 | $4.69 | 44,000.0000 | 24,985,261 | 37.14% | 0.10% |
| June 4, 2025 | PANORA ROBERT A | COO and President | S | Common Stock | 31000 | $5.00 | 13,000.0000 | 24,985,261 | 70.45% | 0.12% |
| June 16, 2025 | PANORA ROBERT A | COO and President | M | Common Stock | 12723 | $0.79 | 25,723.0000 | 24,985,261 | 97.87% | 0.05% |
| June 16, 2025 | PANORA ROBERT A | COO and President | M | Common Stock | 30000 | $0.71 | 55,723.0000 | 24,985,261 | 116.63% | 0.12% |
| June 16, 2025 | PANORA ROBERT A | COO and President | M | Common Stock | 52500 | $1.10 | 108,223.0000 | 24,985,261 | 94.22% | 0.21% |
| June 18, 2025 | PANORA ROBERT A | COO and President | S | Common Stock | 13000 | $5.03 | 95,223.0000 | 24,985,261 | 12.01% | 0.05% |
| June 24, 2025 | PANORA ROBERT A | COO and President | S | Common Stock | 900 | $6.86 | 62,523.0000 | 24,985,261 | 1.42% | 0.00% |
| June 16, 2025 | PANORA ROBERT A | COO and President | M | Stock Option (Right to Buy) | 12723 | $0.79 | 0.0000 | 24,985,261 | 100.00% | 0.05% |
| June 16, 2025 | PANORA ROBERT A | COO and President | M | Stock Option (Right to Buy) | 30000 | $0.71 | 100,000.0000 | 24,985,261 | 23.08% | 0.12% |
| June 16, 2025 | PANORA ROBERT A | COO and President | M | Stock Option (Right to Buy) | 52500 | $1.10 | 0.0000 | 24,985,261 | 100.00% | 0.21% |
| May 27, 2025 | PANORA ROBERT A | COO and President | M | Common Stock | 70000 | $0.71 | 70,000.0000 | 24,985,261 | 9999.99% | 0.28% |
| May 27, 2025 | PANORA ROBERT A | COO and President | M | Stock Options (Right to Buy) | 70000 | $0.71 | 130,000.0000 | 24,985,261 | 35.00% | 0.28% |
| June 4, 2025 | Lafaille Stephen | VP of Business Development | S | Common Stock | 15000 | $5.00 | 400.0000 | 24,985,261 | 97.40% | 0.06% |
| June 6, 2025 | Lafaille Stephen | VP of Business Development | X | Common Stock | 25000 | $1.10 | 25,400.0000 | 24,985,261 | 6250.00% | 0.10% |
| June 6, 2025 | Lafaille Stephen | VP of Business Development | S | Common Stock | 25000 | $5.98 | 400.0000 | 24,985,261 | 98.43% | 0.10% |
| June 23, 2025 | Lafaille Stephen | VP of Business Development | X | Common Stock | 10000 | $1.10 | 10,400.0000 | 24,985,261 | 2500.00% | 0.04% |
| June 23, 2025 | Lafaille Stephen | VP of Business Development | S | Common Stock | 10000 | $7.25 | 400.0000 | 24,985,261 | 96.15% | 0.04% |
| June 23, 2025 | Lafaille Stephen | VP of Business Development | X | Stock Options (Right to Buy) | 10000 | $1.10 | 17,500.0000 | 24,985,261 | 36.36% | 0.04% |
| June 6, 2025 | Lafaille Stephen | VP of Business Development | X | Stock Options (Right to Buy) | 25000 | $1.10 | 27,500.0000 | 24,985,261 | 47.62% | 0.10% |
| June 4, 2025 | Lafaille Stephen | VP of Business Development | X | Stock Options (Right to Buy) | 15000 | $0.71 | 25,000.0000 | 24,985,261 | 37.50% | 0.06% |
| June 3, 2025 | Lafaille Stephen | VP of Business Development | X | Stock Options (Right to Buy) | 10000 | $0.71 | 40,000.0000 | 24,985,261 | 20.00% | 0.04% |
| March 3, 2025 | Lafaille Stephen | VP of Business Development | P | Common Stock | 400 | $2.50 | 400.0000 | 0 | 9999.99% | 0.00% |
| June 3, 2025 | Lafaille Stephen | VP of Business Development | X | Common Stock | 10000 | $0.71 | 10,400.0000 | 24,985,261 | 2500.00% | 0.04% |
| June 3, 2025 | Lafaille Stephen | VP of Business Development | S | Common Stock | 10000 | $4.88 | 400.0000 | 24,985,261 | 96.15% | 0.04% |
| June 4, 2025 | Lafaille Stephen | VP of Business Development | X | Common Stock | 15000 | $0.71 | 15,400.0000 | 24,985,261 | 3750.00% | 0.06% |
| June 16, 2025 | PANORA ROBERT A | COO and President | X | Common Stock | 12723 | $0.79 | 82,723.0000 | 24,985,261 | 18.18% | 0.05% |
| June 16, 2025 | PANORA ROBERT A | COO and President | X | Common Stock | 30000 | $0.71 | 112,723.0000 | 24,985,261 | 36.27% | 0.12% |
| June 16, 2025 | PANORA ROBERT A | COO and President | X | Common Stock | 52500 | $1.10 | 165,223.0000 | 24,985,261 | 46.57% | 0.21% |
| May 27, 2025 | PANORA ROBERT A | COO and President | X | Stock Option (Right to Buy) | 70000 | $0.71 | 130,000.0000 | 24,985,261 | 116.67% | 0.28% |
| May 6, 2025 | LEWIS EARL R | Director | X | Common Stock | 15000 | $1.75 | 982,256.0000 | 24,985,261 | 1.55% | 0.06% |
| May 6, 2025 | LEWIS EARL R | Director | X | Common Stock | 12500 | $1.20 | 994,756.0000 | 24,985,261 | 1.27% | 0.05% |
| May 6, 2025 | LEWIS EARL R | Director | X | Common Stock | 6250 | $1.10 | 1,001,006.0000 | 24,985,261 | 0.63% | 0.03% |
| May 1, 2025 | LEWIS EARL R | Director | J | Common Stock | 240256 | $2.14 | 967,256.0000 | 24,985,261 | 33.05% | 0.96% |
| Nov. 22, 2024 | LEWIS EARL R | Director | M | Stock Option (Right to Buy) | 100000 | $0.71 | 100,000.0000 | 0 | 9999.99% | 0.00% |
| July 15, 2024 | LEWIS EARL R | Director | P | Common Stock | 10000 | $0.68 | 625,000.0000 | 0 | 1.63% | 0.00% |
| Oct. 9, 2023 | LEWIS EARL R | Director | P | Common Stock | 2000 | $0.80 | 627,000.0000 | 0 | 0.32% | 0.00% |
| Nov. 22, 2024 | LEWIS EARL R | Director | X | Common Stock | 100000 | $0.71 | 727,000.0000 | 0 | 15.95% | 0.00% |
| Oct. 9, 2023 | LEWIS EARL R | Director | P | Common Stock | 2000 | $0.80 | 637,000.0000 | 0 | 0.31% | 0.00% |
| Nov. 22, 2024 | LEWIS EARL R | Director | P | Common Stock | 100000 | $0.71 | 737,000.0000 | 0 | 15.70% | 0.00% |
| Sept. 27, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.84 | 988,951.0000 | 0 | 1.02% | 0.00% |
| Sept. 25, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.86 | 978,951.0000 | 0 | 1.03% | 0.00% |
| Aug. 19, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.90 | 968,951.0000 | 0 | 1.04% | 0.00% |
| July 15, 2024 | LEWIS EARL R | Director | P | Common Stock | 10000 | $0.68 | 635,000.0000 | 0 | 1.60% | 0.00% |
| July 15, 2024 | LEWIS EARL R | Director | P | Common Stock | 10000 | $0.68 | 625,000.0000 | 0 | 1.63% | 0.00% |
| July 10, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 22466 | $0.65 | 958,951.0000 | 0 | 2.40% | 0.00% |
| June 6, 2024 | LEWIS EARL R | Director | A | Stock Options (Right to Buy) | 25000 | $0.77 | 200,000.0000 | 0 | 14.29% | 0.00% |
| June 6, 2024 | GHONIEM AHMED | Director | A | Stock Options (Right to Buy) | 25000 | $0.77 | 212,723.0000 | 0 | 13.32% | 0.00% |
| June 6, 2024 | GALITEVA ANGELINA | Director | A | Stock Options (Right to Buy) | 25000 | $0.77 | 200,000.0000 | 0 | 14.29% | 0.00% |
| June 6, 2024 | Hirsch Susan B | Director | A | Stock Options (Right to Buy) | 25000 | $0.77 | 125,000.0000 | 0 | 25.00% | 0.00% |
| June 6, 2024 | ALBERTINE JOHN M | Director | A | Stock Option (Right to Buy) | 25000 | $0.77 | 150,000.0000 | 0 | 20.00% | 0.00% |
| May 28, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 1265 | $0.80 | 936,485.0000 | 0 | 0.14% | 0.00% |
| May 29, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.80 | 935,220.0000 | 0 | 1.08% | 0.00% |
| May 22, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 3200 | $0.79 | 916,485.0000 | 0 | 0.35% | 0.00% |
| May 24, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 8735 | $0.80 | 925,220.0000 | 0 | 0.95% | 0.00% |
| May 21, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 13800 | $0.79 | 913,285.0000 | 0 | 1.53% | 0.00% |
| May 16, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 3000 | $0.75 | 899,485.0000 | 0 | 0.33% | 0.00% |
| May 15, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.74 | 896,485.0000 | 0 | 1.13% | 0.00% |
| May 1, 2024 | LEWIS EARL R | Director | P | Common Stock | 5000 | $0.75 | 615,000.0000 | 0 | 0.82% | 0.00% |
| April 24, 2024 | LEWIS EARL R | Director | P | Common Stock | 10000 | $0.68 | 610,000.0000 | 0 | 1.67% | 0.00% |
| April 24, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 5000 | $0.67 | 886,485.0000 | 0 | 0.57% | 0.00% |
| April 23, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 5000 | $0.69 | 880,485.0000 | 0 | 0.57% | 0.00% |
| April 23, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.68 | 881,485.0000 | 0 | 0.11% | 0.00% |
| Sept. 14, 2023 | LEWIS EARL R | Director | P | Common Stock | 17216 | $0.93 | 594,868.0000 | 0 | 2.98% | 0.00% |
| April 15, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 874,485.0000 | 0 | 0.11% | 0.00% |
| Oct. 9, 2023 | LEWIS EARL R | Director | J | Common Stock | 2000 | $0.00 | 600,000.0000 | 0 | 0.33% | 0.00% |
| Oct. 6, 2023 | LEWIS EARL R | Director | P | Common Stock | 1000 | $0.80 | 602,000.0000 | 0 | 0.17% | 0.00% |
| Oct. 6, 2023 | LEWIS EARL R | Director | P | Common Stock | 132 | $0.79 | 601,000.0000 | 0 | 0.02% | 0.00% |
| Oct. 2, 2023 | LEWIS EARL R | Director | P | Common Stock | 5000 | $0.87 | 600,868.0000 | 0 | 0.84% | 0.00% |
| Sept. 26, 2023 | LEWIS EARL R | Director | P | Common Stock | 1000 | $0.90 | 595,868.0000 | 0 | 0.17% | 0.00% |
| Nov. 29, 2022 | LEWIS EARL R | Director | P | Common Stock | 5000 | $0.00 | 577,652.0000 | 0 | 0.87% | 0.00% |
| Nov. 23, 2022 | LEWIS EARL R | Director | P | Common Stock | 630 | $1.34 | 572,652.0000 | 0 | 0.11% | 0.00% |
| Nov. 22, 2022 | LEWIS EARL R | Director | P | Common Stock | 4987 | $1.36 | 572,022.0000 | 0 | 0.88% | 0.00% |
| Nov. 22, 2022 | LEWIS EARL R | Director | P | Common Stock | 1200 | $0.00 | 567,035.0000 | 0 | 0.21% | 0.00% |
| March 24, 2022 | LEWIS EARL R | Director | P | Common Stock | 5000 | $0.00 | 565,835.0000 | 0 | 0.89% | 0.00% |
| April 16, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.68 | 875,485.0000 | 0 | 0.11% | 0.00% |
| April 12, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 873,485.0000 | 0 | 0.11% | 0.00% |
| April 11, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 872,485.0000 | 0 | 0.11% | 0.00% |
| April 9, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 871,485.0000 | 0 | 0.11% | 0.00% |
| April 8, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 1000 | $0.70 | 870,485.0000 | 0 | 0.12% | 0.00% |
| March 27, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 2000 | $0.70 | 861,485.0000 | 0 | 0.23% | 0.00% |
| April 1, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 5000 | $0.70 | 869,485.0000 | 0 | 0.58% | 0.00% |
| April 1, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 612 | $0.70 | 864,485.0000 | 0 | 0.07% | 0.00% |
| March 28, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 2388 | $0.70 | 863,873.0000 | 0 | 0.28% | 0.00% |
| Jan. 24, 2024 | LEWIS EARL R | Director | P | Common Stock | 9152 | $0.78 | 560,835.0000 | 0 | 1.66% | 0.00% |
| Jan. 23, 2024 | LEWIS EARL R | Director | P | Common Stock | 10000 | $0.68 | 551,683.0000 | 0 | 1.85% | 0.00% |
| Jan. 22, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.77 | 859,485.0000 | 0 | 1.18% | 0.00% |
| Jan. 18, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 10000 | $0.73 | 849,485.0000 | 0 | 1.19% | 0.00% |
| Jan. 16, 2024 | HATSOPOULOS JOHN | Director | P | Common Stock | 100000 | $0.73 | 839,485.0000 | 0 | 13.52% | 0.00% |