81 institutions reported holding $22.2M of TECOGEN INC NEW (TGEN) in SEC 13F filings for 2026-03-31. Largest institutional holders: VANGUARD CAPITAL MANAGEMENT LLC ($2.0M), BARD ASSOCIATES INC ($1.8M), Clear Harbor Asset Management, LLC ($1.7M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($1.2M), Portolan Capital Management, LLC ($1.1M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT LLC | $2.0M | 769,964 | New |
| 2 | BARD ASSOCIATES INC | $1.8M | 688,309 | Trimmed |
| 3 | Clear Harbor Asset Management, LLC | $1.7M | 650,000 | Added |
| 4 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.2M | 481,157 | Trimmed |
| 5 | Portolan Capital Management, LLC | $1.1M | 443,555 | Trimmed |
| 6 | CITADEL ADVISORS LLC | $1.1M | 430,072 | Added |
| 7 | Herald Investment Management Ltd | $1.1M | 420,000 | Hold |
| 8 | Arosa Capital Management LP | $896,000 | 350,000 | Hold |
| 9 | Palisades Investment Partners, LLC | $854,802 | 333,907 | Trimmed |
| 10 | UBS Group AG | $818,781 | 319,836 | Added |
| 11 | Meros Investment Management, LP | $746,765 | 291,705 | New |
| 12 | RENAISSANCE TECHNOLOGIES LLC | $697,088 | 272,300 | Added |
| 13 | GENDELL JEFFREY L | $628,585 | 245,541 | Trimmed |
| 14 | Integrated Wealth Concepts LLC | $559,053 | 218,380 | New |
| 15 | MARSHALL WACE, LLP | $531,114 | 207,467 | Trimmed |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | $491,827 | 192,002 | Added |
| 17 | JANE STREET GROUP, LLC | $489,324 | 191,142 | Trimmed |
| 18 | RAYMOND JAMES FINANCIAL INC | $475,633 | 185,794 | Added |
| 19 | BlackRock, Inc. | $473,034 | 184,779 | Trimmed |
| 20 | NEW YORK STATE COMMON RETIREMENT FUND | $351,232 | 137,200 | Hold |
| 21 | HighTower Advisors, LLC | $339,623 | 132,665 | Hold |
| 22 | SIMPLEX TRADING, LLC | $294,481 | 115,032 | Trimmed |
| 23 | GROUP ONE TRADING LLC | $269,368 | 105,222 | Trimmed |
| 24 | THOMPSON DAVIS & CO., INC. | $253,440 | 99,000 | Trimmed |
| 25 | VANGUARD FIDUCIARY TRUST CO | $246,892 | 96,442 | New |
Source: SEC Form 13F filings · as of 2026-03-31