Tecogen Inc./Waltham MaTGEN
13F holders, Q1 2026 (March 31)62holders −3
12new positions
17sold out
3famous investors
$2.56avg. 13F price*
At the end of Q1 2026, 62 institutions reported holding Tecogen Inc./Waltham Ma (TGEN) in their 13F filings, down 3 from Q4 2025. 12 opened new positions and 17 sold out. The largest holders were Vanguard Capital Management LLC ($2.0M), Bard Associates Inc. ($1.8M) and Clear Harbor Asset Management, LLC ($1.7M). 3 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Mario Gabelli (0.0% of GAMCO Investors's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Tecogen Inc./Waltham Ma
- CUSIP
- 87876P201
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 12 | $1.8M |
| Exits | 17 | $1.9M |
All 13F filers, Q4 2025 → Q1 2026: 1,496,011 shares bought and 1,326,102 shares sold, net +169,909 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 62 holders
| Vanguard Capital Management LLC | 0.00% | — | 769,964 | $2.0M |
| Bard Associates Inc. | 0.44% | Reduce -0.1% | 688,309 | $1.8M |
| Clear Harbor Asset Management, LLC | 0.12% | Add +6.6% | 650,000 | $1.7M |
| Portolan Capital Management, LLC | 0.06% | Reduce -0.5% | 443,555 | $1.1M |
| HERALD INVESTMENT MANAGEMENT Ltd | 0.15% | No change | 420,000 | $1.1M |
| Arosa Capital Management LP | 0.59% | No change | 350,000 | $896K |
| Palisades Investment Partners, LLC | 0.34% | Reduce -14.4% | 333,907 | $855K |
| UBS Group AG | 0.00% | Add +204.7% | 319,836 | $819K |
| Meros Investment Management, LP | 0.32% | New | 291,705 | $747K |
| Renaissance Technologies | 0.00% | Add +401.5% | 272,300 | $697K |
| Gendell Jeffrey L | 0.01% | Reduce -16.9% | 245,541 | $629K |
| Integrated Wealth Concepts LLC | 0.00% | New | 218,380 | $559K |
| Marshall Wace, LLP | 0.00% | Reduce -27.5% | 207,467 | $531K |
| Geode Capital Management, LLC | 0.00% | Add +7.9% | 192,002 | $492K |
| Raymond James Financial Inc. | 0.00% | Add +86.3% | 185,794 | $476K |
| BlackRock, Inc. | 0.00% | Reduce -3.4% | 184,779 | $473K |
| Citadel Advisors | 0.00% | Add +201.5% | 147,472 | $378K |
| New York State Common Retirement Fund | 0.00% | No change | 137,200 | $351K |
| HighTower Advisors, LLC | 0.00% | No change | 132,665 | $340K |
| Jane Street Group, LLC | 0.00% | Reduce -43.5% | 117,342 | $300K |
| Susquehanna International Group, LLP | 0.00% | Reduce -63.9% | 109,457 | $280K |
| Thompson Davis & Co., Inc. | 0.17% | Reduce -17.8% | 99,000 | $253K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 96,442 | $247K |
| Gsa Capital Partners LLP | 0.01% | Add +384.6% | 94,170 | $241K |
| Granahan Investment Management, LLC | 0.01% | Reduce -50.2% | 88,496 | $227K |
| Group One Trading LLC | 0.01% | Add +48.3% | 83,922 | $215K |
| Apis Capital Advisors, LLC | 0.03% | New | 77,000 | $197K |
| Morgan Stanley | 0.00% | Add +9.7% | 76,736 | $196K |
| State Street Corp. | 0.00% | No change | 69,226 | $177K |
| Two Sigma Investments, LP | 0.00% | Reduce -69.2% | 67,418 | $173K |
| PFG Investments, LLC | 0.01% | No change | 62,523 | $160K |
| Corsair Capital Management, L.P. | 0.02% | No change | 55,017 | $141K |
| Diametric Capital, LP | 0.04% | Reduce -0.2% | 53,131 | $136K |
| Simplex Trading, LLC | 0.00% | Reduce -11.2% | 41,332 | $106K |
| LPL Financial LLC | 0.00% | Reduce -44.1% | 41,251 | $106K |
| GAMCO Investors | 0.00% | No change | 40,000 | $102K |
| Harbor Capital Advisors, Inc. | 0.01% | Reduce -1.2% | 39,973 | $102K |
| Northern Trust Corp. | 0.00% | No change | 37,681 | $96K |
| Jump Financial, LLC | 0.00% | New | 35,500 | $91K |
| Bridgeway Capital Management, LLC | 0.00% | Add +29.6% | 33,048 | $85K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -62.9% | 25,106 | $64K |
| Gabelli Funds LLC | 0.00% | New | 20,000 | $51K |
| Pathstone Holdings, LLC | 0.00% | No change | 18,725 | $48K |
| Shikiar Asset Management Inc. | 0.01% | Add +32.7% | 17,650 | $45K |
| Commonwealth Equity Services, LLC | 0.00% | Add +37.0% | 16,124 | $41K |
| HRT Financial LP | 0.00% | New | 15,071 | $38K |
| IMC-Chicago, LLC | 0.00% | Reduce -68.2% | 13,650 | $35K |
| Dimensional Fund Advisors LP | 0.00% | New | 11,163 | $29K |
| Tower Research Capital LLC (TRC) | 0.00% | New | 10,189 | $26K |
| Citizens Financial Group Inc. | 0.00% | New | 10,000 | $26K |
| Vanguard Global Advisers, LLC | 0.00% | — | 5,434 | $14K |
| NewEdge Advisors, LLC | 0.00% | Add +4921.6% | 4,419 | $11K |
| Royal Bank of Canada | 0.00% | Reduce -96.3% | 3,143 | $8K |
| EverSource Wealth Advisors, LLC | 0.00% | Add +150.0% | 2,500 | $6K |
| Advisory Services Network, LLC | 0.00% | New | 2,490 | $6K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | New | 1,583 | $4K |
| Federation des caisses Desjardins du Quebec | 0.00% | No change | 562 | $1K |
| National Bank of Canada | 0.00% | Add +117.4% | 500 | $1K |
| State of Wyoming | 0.00% | Reduce -8.2% | 494 | $1K |
| Fortitude Family Office, LLC | 0.00% | New | 181 | $463 |
| SBI Securities Co., Ltd. | 0.00% | Add +2.6% | 120 | $307 |
| MAI Capital Management | 0.00% | No change | 64 | $164 |
"% of holder's portfolio" is TGEN's weight in each manager's 13F, not the share of Tecogen Inc./Waltham Ma the manager owns.