Tecogen Inc./Waltham MaTGEN
13F holders, Q3 2025 (September 30)70holders +40
42new positions
2sold out
4famous investors
$8.80avg. 13F price*
At the end of Q3 2025, 70 institutions reported holding Tecogen Inc./Waltham Ma (TGEN) in their 13F filings, up 40 from Q2 2025. 42 opened new positions and 2 sold out. The largest holders were Vanguard Group Inc. ($7.7M), Bard Associates Inc. ($6.1M) and Clear Harbor Asset Management, LLC ($5.4M). 4 famous investors held it, including Mario Gabelli (0.0% of GAMCO Investors's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Tecogen Inc./Waltham Ma
- CUSIP
- 87876P201
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 42 | $27.4M |
| Exits | 2 | $44K |
All 13F filers, Q2 2025 → Q3 2025: 3,892,697 shares bought and 30,623 shares sold, net +3,862,074 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 70 holders
| Vanguard Group Inc. | 0.00% | Add +5.4% | 870,440 | $7.7M |
| Bard Associates Inc. | 1.62% | Add +10.8% | 690,611 | $6.1M |
| Clear Harbor Asset Management, LLC | 0.38% | Add +0.3% | 611,600 | $5.4M |
| Portolan Capital Management, LLC | 0.28% | Add +28.0% | 595,806 | $5.2M |
| HERALD INVESTMENT MANAGEMENT Ltd | 0.52% | Add +38.9% | 446,078 | $3.9M |
| Palisades Investment Partners, LLC | 1.30% | New | 376,594 | $3.3M |
| Arosa Capital Management LP | 4.11% | New | 287,500 | $2.5M |
| Susquehanna International Group, LLP | 0.00% | New | 252,035 | $2.2M |
| Two Sigma Investments, LP | 0.00% | New | 246,705 | $2.2M |
| Gendell Jeffrey L | 0.04% | Add +484.2% | 243,622 | $2.1M |
| Integrated Wealth Concepts LLC | 0.02% | Add +22.1% | 216,465 | $1.9M |
| Citadel Advisors | 0.00% | New | 213,708 | $1.9M |
| BlackRock, Inc. | 0.00% | No change | 184,779 | $1.6M |
| Geode Capital Management, LLC | 0.00% | Add +16.6% | 166,557 | $1.5M |
| Raymond James Financial Inc. | 0.00% | New | 157,888 | $1.4M |
| Apis Capital Advisors, LLC | 0.30% | New | 153,000 | $1.3M |
| New York State Common Retirement Fund | 0.00% | New | 137,200 | $1.2M |
| Goldman Sachs Group Inc. | 0.00% | New | 132,762 | $1.2M |
| Royal Bank of Canada | 0.00% | Add +109.2% | 122,389 | $1.1M |
| Thompson Davis & Co., Inc. | 0.64% | New | 117,953 | $1.0M |
| Granahan Investment Management, LLC | 0.04% | New | 112,338 | $990K |
| Renaissance Technologies | 0.00% | New | 102,200 | $900K |
| Russell Investments Group, Ltd. | 0.00% | New | 94,696 | $834K |
| Jane Street Group, LLC | 0.00% | New | 93,110 | $820K |
| Informed Momentum Co LLC | 0.07% | New | 74,101 | $653K |
| State Street Corp. | 0.00% | Add +68.4% | 69,726 | $614K |
| HighTower Advisors, LLC | 0.00% | Reduce -0.8% | 63,067 | $556K |
| PFG Investments, LLC | 0.03% | No change | 62,523 | $551K |
| Corsair Capital Management, L.P. | 0.09% | Reduce -18.8% | 55,000 | $485K |
| Manatuck Hill Partners, LLC | 0.15% | New | 50,000 | $441K |
| Marshall Wace, LLP | 0.00% | New | 49,089 | $432K |
| Millennium Management | 0.00% | New | 48,245 | $425K |
| ARS Investment Partners, LLC | 0.03% | New | 43,173 | $380K |
| GAMCO Investors | 0.00% | Reduce -4.8% | 40,000 | $352K |
| Heron Bay Capital Management | 0.06% | No change | 37,167 | $327K |
| Two Sigma Advisers, LP | 0.00% | New | 36,200 | $319K |
| Evernest Financial Advisors, LLC | 0.08% | New | 34,150 | $301K |
| Group One Trading LLC | 0.01% | New | 33,952 | $299K |
| Simplex Trading, LLC | 0.01% | New | 31,562 | $278K |
| J.W. Cole Advisors, Inc. | 0.01% | New | 31,400 | $277K |
| Diametric Capital, LP | 0.10% | New | 30,741 | $271K |
| Harbor Capital Advisors, Inc. | 0.02% | New | 27,481 | $242K |
| Northern Trust Corp. | 0.00% | No change | 25,737 | $227K |
| Bridgeway Capital Management, LLC | 0.00% | New | 25,500 | $225K |
| Morgan Stanley | 0.00% | Add +3630.8% | 22,385 | $197K |
| Virtu Financial LLC | 0.01% | New | 20,036 | $177K |
| Pathstone Holdings, LLC | 0.00% | No change | 18,725 | $165K |
| Shikiar Asset Management Inc. | 0.05% | Reduce -15.9% | 18,500 | $163K |
| Wolverine Trading, LLC | 0.00% | New | 17,495 | $144K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +2971.4% | 15,234 | $134K |
| IQ EQ FUND MANAGEMENT (SINGAPORE) PRIVATE Ltd | 0.18% | Reduce -2.6% | 14,700 | $130K |
| Marex Group Ltd | 0.00% | New | 14,700 | $130K |
| Hidden Cove Wealth Management, LLC | 0.08% | New | 14,042 | $124K |
| Rockefeller Capital Management L.P. | 0.00% | New | 12,500 | $110K |
| Calamos Advisors LLC | 0.00% | New | 12,479 | $110K |
| Charles Schwab Investment Management Inc. | 0.00% | New | 12,000 | $106K |
| NewEdge Advisors, LLC | 0.00% | New | 10,300 | $91K |
| UBS Group AG | 0.00% | Add +319500.0% | 9,588 | $84K |
| Advisory Services Network, LLC | 0.00% | Reduce -50.0% | 5,000 | $44K |
| CoreCap Advisors, LLC | 0.00% | New | 4,944 | $44K |
| Bank of America Corp. | 0.00% | Add +4069.0% | 4,836 | $43K |
| EverSource Wealth Advisors, LLC | 0.00% | New | 2,000 | $18K |
| Altshuler Shaham Ltd | 0.00% | New | 1,500 | $13K |
| JPMorgan Chase & Co. | 0.00% | No change | 450 | $4K |
| Osaic Holdings, Inc. | 0.00% | New | 500 | $4K |
| National Bank of Canada | 0.00% | New | 230 | $2K |
| SBI Securities Co., Ltd. | 0.00% | No change | 117 | $1K |
| State of Wyoming | 0.00% | New | 90 | $793 |
| MAI Capital Management | 0.00% | No change | 64 | $564 |
| ORG Partners LLC | 0.00% | New | 50 | $440 |
"% of holder's portfolio" is TGEN's weight in each manager's 13F, not the share of Tecogen Inc./Waltham Ma the manager owns.