Tecogen Inc. (NYSE:TGEN) has 66 institutional investors that have filed 13F reports for the period ending December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 31 Dec, 2025 | 871,840 | 1,400 | 0.16% | $4,306,889.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Dec, 2025 | 769,964 | 769,964 | 0.00% | $1,971,108.00 |
| BARD ASSOCIATES INC | 31 Dec, 2025 | 689,107 | -1,504 | -0.22% | $3,404,189.00 |
| BARD ASSOCIATES INC | 31 Dec, 2025 | 688,309 | -798 | -0.12% | $1,762,072.00 |
| Clear Harbor Asset Management, LLC | 31 Dec, 2025 | 650,000 | 40,000 | 6.56% | $1,664,000.00 |
| Clear Harbor Asset Management, LLC | 31 Dec, 2025 | 610,000 | -613,200 | -50.13% | $3,013,400.00 |
| Portolan Capital Management, LLC | 31 Dec, 2025 | 445,810 | -149,996 | -25.18% | $2,202,301.00 |
| Portolan Capital Management, LLC | 31 Dec, 2025 | 443,555 | -2,255 | -0.51% | $1,135,501.00 |
| HERALD INVESTMENT MANAGEMENT Ltd | 31 Dec, 2025 | 420,000 | 0 | 0.00% | $1,079,400.00 |
| HERALD INVESTMENT MANAGEMENT Ltd | 31 Dec, 2025 | 420,000 | -26,078 | -5.85% | $2,083,200.00 |
| Palisades Investment Partners, LLC | 31 Dec, 2025 | 390,212 | 13,618 | 3.62% | $1,927,647.00 |
| Arosa Capital Management LP | 31 Dec, 2025 | 350,000 | 0 | 0.00% | $896,000.00 |
| Arosa Capital Management LP | 31 Dec, 2025 | 350,000 | 62,500 | 21.74% | $1,729,000.00 |
| Palisades Investment Partners, LLC | 31 Dec, 2025 | 333,907 | -56,305 | -14.43% | $854,802.00 |
| UBS Group AG | 31 Dec, 2025 | 319,836 | 214,877 | 204.72% | $818,781.00 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 31 Dec, 2025 | 302,911 | 50,876 | 20.19% | $1,496,380.00 |
| GENDELL JEFFREY L | 31 Dec, 2025 | 295,541 | 51,919 | 21.31% | $1,459,973.00 |
| Meros Investment Management, LP | 31 Dec, 2025 | 291,705 | 291,705 | 0.00% | $746,765.00 |
| MARSHALL WACE, LLP | 31 Dec, 2025 | 286,325 | 237,236 | 483.28% | $1,414,446.00 |
| RENAISSANCE TECHNOLOGIES LLC | 31 Dec, 2025 | 272,300 | 218,000 | 401.47% | $697,088.00 |