Stephen Lafaille, VP of Business Development at Tecogen Inc. ($TGEN), sold shares on the open market four times over the past year, totaling $346 thousand. His most recent $TGEN insider sale occurred on June 23, 2025. These transactions rank 7,274th among 11,678 insiders by sale value, well below the average of $8.6 million across 6.4 transactions per seller. Lafaille made no open market purchases in the last 365 days.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| July 24, 2025 | TECOGEN INC. | $TGEN | 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 | TECOGEN INC. | $TGEN | 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% |
| March 3, 2025 | TECOGEN INC. | $TGEN | Lafaille Stephen | VP of Business Development | P | Common Stock | 400 | $2.50 | 400.0000 | 0 | 9999.99% | 0.00% |
| June 3, 2025 | TECOGEN INC. | $TGEN | 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 | TECOGEN INC. | $TGEN | Lafaille Stephen | VP of Business Development | S | Common Stock | 10000 | $4.88 | 400.0000 | 24,985,261 | 96.15% | 0.04% |
| June 4, 2025 | TECOGEN INC. | $TGEN | Lafaille Stephen | VP of Business Development | X | Common Stock | 15000 | $0.71 | 15,400.0000 | 24,985,261 | 3750.00% | 0.06% |
| June 4, 2025 | TECOGEN INC. | $TGEN | Lafaille Stephen | VP of Business Development | S | Common Stock | 15000 | $5.00 | 400.0000 | 24,985,261 | 97.40% | 0.06% |
| June 6, 2025 | TECOGEN INC. | $TGEN | 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 | TECOGEN INC. | $TGEN | Lafaille Stephen | VP of Business Development | S | Common Stock | 25000 | $5.98 | 400.0000 | 24,985,261 | 98.43% | 0.10% |
| June 23, 2025 | TECOGEN INC. | $TGEN | 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 | TECOGEN INC. | $TGEN | Lafaille Stephen | VP of Business Development | S | Common Stock | 10000 | $7.25 | 400.0000 | 24,985,261 | 96.15% | 0.04% |
| June 3, 2025 | TECOGEN INC. | $TGEN | 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% |
| June 4, 2025 | TECOGEN INC. | $TGEN | 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 6, 2025 | TECOGEN INC. | $TGEN | 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 23, 2025 | TECOGEN INC. | $TGEN | 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% |