TGEN Tecogen Inc.
Tecogen Inc. (TGEN) Institutional Ownership
What the institutions did with TGEN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Portolan Capital Management, LLC | 1.6M | 16.4% |
| VANGUARD CAPITAL MANAGEMENT LLC | 788.7K | 8.3% |
| BARD ASSOCIATES INC | 682.2K | 7.2% |
| Clear Harbor Asset Management, LLC | 650.0K | 6.9% |
| HERALD INVESTMENT MANAGEMENT Ltd | 420.0K | 4.4% |
| GRATIA CAPITAL, LLC | 388.7K | 4.1% |
| UBS Group AG | 363.0K | 3.8% |
| Meros Investment Management, LP | 353.5K | 3.7% |
| Palisades Investment Partners, LLC | 323.1K | 3.4% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 315.8K | 3.3% |
| MORGAN STANLEY | 301.7K | 3.2% |
| RAYMOND JAMES FINANCIAL INC | 290.3K | 3.1% |
| BlackRock, Inc. | 251.5K | 2.7% |
| CITADEL ADVISORS LLC | 242.3K | 2.6% |
| Huntleigh Advisors, Inc. | 220.1K | 2.3% |
| HEARTLAND ADVISORS INC | 182.1K | 1.9% |
| GEODE CAPITAL MANAGEMENT, LLC | 180.9K | 1.9% |
| THOMPSON DAVIS & CO., INC. | 144.8K | 1.5% |
| NEW YORK STATE COMMON RETIREMENT FUND | 137.2K | 1.4% |
| GSA CAPITAL PARTNERS LLP | 126.5K | 1.3% |
| Arosa Capital Management LP | 125.0K | 1.3% |
| Integrated Wealth Concepts LLC | 112.1K | 1.2% |
| Apis Capital Advisors, LLC | 112.0K | 1.2% |
| VANGUARD FIDUCIARY TRUST CO | 106.0K | 1.1% |
| GOLDMAN SACHS GROUP INC | 69.5K | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Portolan Capital Management, LLC | Increased | 443.6K | 1.6M | +1.1M |
| GRATIA CAPITAL, LLC | New | 0 | 388.7K | +388.7K |
| RENAISSANCE TECHNOLOGIES LLC | Sold Out | 272.3K | 0 | -272.3K |
| Arosa Capital Management LP | Reduced | 350.0K | 125.0K | -225.0K |
| MORGAN STANLEY | Increased | 76.7K | 301.7K | +225.0K |
| Huntleigh Advisors, Inc. | New | 0 | 220.1K | +220.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 109.5K | 315.8K | +206.4K |
| GENDELL JEFFREY L | Reduced | 245.5K | 49.8K | -195.7K |
| HEARTLAND ADVISORS INC | New | 0 | 182.1K | +182.1K |
| MARSHALL WACE, LLP | Reduced | 207.5K | 54.8K | -152.7K |
| Integrated Wealth Concepts LLC | Reduced | 218.4K | 112.1K | -106.3K |
| RAYMOND JAMES FINANCIAL INC | Increased | 185.8K | 290.3K | +104.5K |
| CITADEL ADVISORS LLC | Increased | 147.5K | 242.3K | +94.8K |
| HighTower Advisors, LLC | Reduced | 132.7K | 39.5K | -93.2K |
| Granahan Investment Management, LLC | Sold Out | 88.5K | 0 | -88.5K |
| JANE STREET GROUP, LLC | Reduced | 117.3K | 49.1K | -68.3K |
| TWO SIGMA INVESTMENTS, LP | Sold Out | 67.4K | 0 | -67.4K |
| BlackRock, Inc. | Increased | 184.8K | 251.5K | +66.7K |
| Meros Investment Management, LP | Increased | 291.7K | 353.5K | +61.8K |
| IMC-Chicago, LLC | Increased | 13.7K | 61.8K | +48.2K |
| THOMPSON DAVIS & CO., INC. | Increased | 99.0K | 144.8K | +45.8K |
| GOLDMAN SACHS GROUP INC | Increased | 25.1K | 69.5K | +44.4K |
| HRT FINANCIAL LP | Increased | 15.1K | 59.3K | +44.2K |
| UBS Group AG | Increased | 319.8K | 363.0K | +43.2K |
| LPL Financial LLC | Sold Out | 41.3K | 0 | -41.3K |
| SIMPLEX TRADING, LLC | Reduced | 41.3K | 479 | -40.9K |
| HARBOR CAPITAL ADVISORS, INC. | Sold Out | 40.0K | 0 | -40.0K |
| SHIKIAR ASSET MANAGEMENT INC | Increased | 17.7K | 54.1K | +36.4K |
| Jump Financial, LLC | Sold Out | 35.5K | 0 | -35.5K |
| Apis Capital Advisors, LLC | Increased | 77.0K | 112.0K | +35.0K |
| GROUP ONE TRADING LLC | Reduced | 83.9K | 49.9K | -34.1K |
| XTX Topco Ltd | New | 0 | 32.4K | +32.4K |
| GSA CAPITAL PARTNERS LLP | Increased | 94.2K | 126.5K | +32.3K |
| Centiva Capital, LP | New | 0 | 27.5K | +27.5K |
| Crewe Advisors LLC | New | 0 | 23.0K | +23.0K |
| Jefferies Financial Group Inc. | New | 0 | 19.3K | +19.3K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 770.0K | 788.7K | +18.7K |
| Virtu Financial LLC | New | 0 | 16.4K | +16.4K |
| D. E. Shaw & Co., Inc. | New | 0 | 15.3K | +15.3K |
| Belvedere Trading LLC | New | 0 | 15.2K | +15.2K |
| Quadrature Capital Ltd | New | 0 | 14.1K | +14.1K |
| Diametric Capital, LP | Increased | 53.1K | 66.3K | +13.2K |
| Wealthspire Advisors, LLC | New | 0 | 11.7K | +11.7K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 192.0K | 180.9K | -11.1K |
| Palisades Investment Partners, LLC | Reduced | 333.9K | 323.1K | -10.8K |
| Tower Research Capital LLC (TRC) | Sold Out | 10.2K | 0 | -10.2K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 96.4K | 106.0K | +9.5K |
| BARD ASSOCIATES INC | Reduced | 688.3K | 682.2K | -6.1K |
| NewEdge Advisors, LLC | Sold Out | 4.4K | 0 | -4.4K |
| ROYAL BANK OF CANADA | Reduced | 3.1K | 227 | -2.9K |
| COMMONWEALTH EQUITY SERVICES, LLC | Reduced | 16.1K | 13.6K | -2.5K |
| EverSource Wealth Advisors, LLC | Sold Out | 2.5K | 0 | -2.5K |
| Advisory Services Network, LLC | Sold Out | 2.5K | 0 | -2.5K |
| Persistent Asset Partners Ltd | New | 0 | 2.3K | +2.3K |
| CITIGROUP INC | New | 0 | 1.6K | +1.6K |
| NATIONAL BANK OF CANADA /FI/ | Sold Out | 500 | 0 | -500 |
| State of Wyoming | Sold Out | 494 | 0 | -494 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | New | 0 | 266 | +266 |
| Bogart Wealth, LLC | New | 0 | 118 | +118 |
| NORTHERN TRUST CORP | Reduced | 37.7K | 37.6K | -112 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.