| $1B | ||
| $100M | ||
| $54M | ||
| $40M | ||
| $32M | ||
| $31M |
Buys | $134,049 | 8 | 100 |
Sells | $0 | 0 | 0 |
| Hirsch Susan B | director | 2 | $44,050 | 0 | $0 | $44,050 |
| Lewis Earl | director | 2 | $27,005 | 0 | $0 | $27,005 |
| Whiting John Kimball IV | General Counsel & Secretary | 1 | $23,800 | 0 | $0 | $23,800 |
| Deschenes Roger P. | CAO | 1 | $22,300 | 0 | $0 | $22,300 |
| Ghoniem Ahmed | director | 1 | $10,000 | 0 | $0 | $10,000 |
| Rangesh Abinand | Chief Executive Officer | 1 | $6,894 | 0 | $0 | $6,894 |
Tecogen Inc. specializes in the design, manufacturing, sales, and ongoing support of industrial and commercial combined heat and power (CHP) systems. These energy solutions cater to a wide range of applications—residential, commercial, recreational, and industrial—both within the United States and internationally. The company's operations are segmented into three main areas: Products, Services, and Energy Production. Its product offerings include: Cogeneration units, such as the InVerde e+ and TecoPower models, which efficiently produce both …
Over the last 12 months, insiders at Tecogen Inc. have bought $134,049 and sold $0 worth of Tecogen Inc. stock.
On average, over the past 5 years, insiders at Tecogen Inc. have bought $134,049 and sold $0 worth of stock each year.
Highest buying activity among insiders over the last 12 months: Hirsch Susan B (director) — $44,050. Lewis Earl (director) — $27,005. Whiting John Kimball IV (General Counsel & Secretary) — $23,800.
The last purchase of 12,723 shares for transaction amount of $10,000 was made by Ghoniem Ahmed (director) on 2026‑04‑24.
| 2026-04-24 | Ghoniem Ahmed | director | 12,723 0.0078% | $0.79 | $10,000 | -16.32% | ||
| 2026-04-13 | Hirsch Susan B | director | 5,000 0.0202% | $3.73 | $18,650 | +2.89% | ||
| 2026-03-27 | Lewis Earl | director | 5,000 0.0164% | $2.52 | $12,596 | +40.47% | ||
| 2026-03-27 | Hirsch Susan B | director | 10,000 0.0331% | $2.54 | $25,400 | +40.47% | ||
| 2026-03-26 | Lewis Earl | director | 5,000 0.0184% | $2.88 | $14,409 | +37.02% | ||
| 2026-03-23 | Whiting John Kimball IV | General Counsel & Secretary | 10,000 0.0338% | $2.38 | $23,800 | +50.85% | ||
| 2026-03-20 | Rangesh Abinand | Chief Executive Officer | 3,000 0.0104% | $2.30 | $6,894 | +59.19% | ||
| 2026-03-20 | Deschenes Roger P. | CAO | 10,000 0.0335% | $2.23 | $22,300 | +59.19% |
| Increased Positions | 39 | +48.15% | 1M | +18.08% |
| Decreased Positions | 35 | -43.21% | 1M | -19.04% |
| New Positions | 16 | New | 465,303 | New |
| Sold Out Positions | 19 | Sold Out | 840,095 | Sold Out |
| Total Postitions | 85 | +4.94% | 8M | -0.95% |
| Vanguard Group Inc | $4,648.00 | 2.9% | 870,440 | +44,797 | +5.43% | 2025-09-30 |
| Bard Associates Inc | $3,688.00 | 2.3% | 690,611 | +67,029 | +10.75% | 2025-09-30 |
| Clear Harbor Asset Management, Llc | $3,266.00 | 2.04% | 611,600 | +1,600 | +0.26% | 2025-09-30 |
| Portolan Capital Management, Llc | $3,182.00 | 1.99% | 595,806 | +130,235 | +27.97% | 2025-09-30 |
| Herald Investment Management Ltd | $2,382.00 | 1.49% | 446,078 | +125,000 | +38.93% | 2025-09-30 |
| Palisades Investment Partners, Llc | $2,011.00 | 1.26% | 376,594 | +376,594 | New | 2025-09-30 |
| Arosa Capital Management Lp | $1,535.00 | 0.96% | 287,500 | +287,500 | New | 2025-09-30 |
| Susquehanna International Group, Llp | $1,346.00 | 0.84% | 252,035 | +252,035 | New | 2025-09-30 |
| Two Sigma Investments, Lp | $1,317.00 | 0.82% | 246,705 | +246,705 | New | 2025-09-30 |
| Gendell Jeffrey L | $1,301.00 | 0.81% | 243,622 | +201,922 | +484.23% | 2025-09-30 |