Tecogen Inc./Waltham MaTGEN
13F holders, Q4 2025 (December 31)65holders −5
14new positions
19sold out
5famous investors
$4.94avg. 13F price*
At the end of Q4 2025, 65 institutions reported holding Tecogen Inc./Waltham Ma (TGEN) in their 13F filings, down 5 from Q3 2025. 14 opened new positions and 19 sold out. The largest holders were Vanguard Group Inc. ($4.3M), Bard Associates Inc. ($3.4M) and Clear Harbor Asset Management, LLC ($3.0M). 5 famous investors held it, including Mario Gabelli (0.0% of GAMCO Investors's portfolio), Steve Cohen (0.0% of Point72 Asset Management'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 Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 14 | $2.1M |
| Exits | 19 | $7.4M |
All 13F filers, Q3 2025 → Q4 2025: 1,361,903 shares bought and 1,467,804 shares sold, net −105,901 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 65 holders
| Vanguard Group Inc. | 0.00% | Add +0.2% | 871,840 | $4.3M |
| Bard Associates Inc. | 0.88% | Reduce -0.2% | 689,107 | $3.4M |
| Clear Harbor Asset Management, LLC | 0.21% | Reduce -0.3% | 610,000 | $3.0M |
| Portolan Capital Management, LLC | 0.12% | Reduce -25.2% | 445,810 | $2.2M |
| HERALD INVESTMENT MANAGEMENT Ltd | 0.27% | Reduce -5.8% | 420,000 | $2.1M |
| Palisades Investment Partners, LLC | 0.73% | Add +3.6% | 390,212 | $1.9M |
| Arosa Capital Management LP | 1.11% | Add +21.7% | 350,000 | $1.7M |
| Susquehanna International Group, LLP | 0.00% | Add +20.2% | 302,911 | $1.5M |
| Gendell Jeffrey L | 0.03% | Add +21.3% | 295,541 | $1.5M |
| Marshall Wace, LLP | 0.00% | Add +483.3% | 286,325 | $1.4M |
| Two Sigma Investments, LP | 0.00% | Reduce -11.4% | 218,628 | $1.1M |
| Jane Street Group, LLC | 0.00% | Add +123.0% | 207,607 | $1.0M |
| BlackRock, Inc. | 0.00% | Add +3.6% | 191,360 | $945K |
| Geode Capital Management, LLC | 0.00% | Add +6.8% | 177,914 | $879K |
| Granahan Investment Management, LLC | 0.04% | Add +58.3% | 177,822 | $878K |
| New York State Common Retirement Fund | 0.00% | No change | 137,200 | $678K |
| HighTower Advisors, LLC | 0.00% | Add +110.4% | 132,665 | $655K |
| Thompson Davis & Co., Inc. | 0.36% | Add +2.1% | 120,450 | $595K |
| UBS Group AG | 0.00% | Add +994.7% | 104,959 | $518K |
| Raymond James Financial Inc. | 0.00% | Reduce -36.8% | 99,754 | $493K |
| Royal Bank of Canada | 0.00% | Reduce -30.1% | 85,545 | $423K |
| Point72 Asset Management | 0.00% | New | 83,907 | $415K |
| LPL Financial LLC | 0.00% | New | 73,793 | $365K |
| Morgan Stanley | 0.00% | Add +212.6% | 69,978 | $346K |
| State Street Corp. | 0.00% | Reduce -0.7% | 69,226 | $342K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -49.0% | 67,724 | $335K |
| PFG Investments, LLC | 0.01% | No change | 62,523 | $309K |
| Mangrove Partners Im, LLC | 0.02% | New | 61,207 | $302K |
| Group One Trading LLC | 0.01% | Add +66.6% | 56,578 | $279K |
| Corsair Capital Management, L.P. | 0.04% | Add +0.0% | 55,017 | $272K |
| XTX Topco Ltd | 0.01% | New | 54,763 | $271K |
| Renaissance Technologies | 0.00% | Reduce -46.9% | 54,300 | $268K |
| Diametric Capital, LP | 0.07% | Add +73.2% | 53,227 | $263K |
| Citadel Advisors | 0.00% | Reduce -77.1% | 48,920 | $242K |
| Simplex Trading, LLC | 0.01% | Add +47.4% | 46,531 | $230K |
| IMC-Chicago, LLC | 0.00% | New | 42,955 | $212K |
| OMERS ADMINISTRATION Corp | 0.00% | New | 42,000 | $207K |
| Harbor Capital Advisors, Inc. | 0.02% | Add +47.2% | 40,447 | $200K |
| GAMCO Investors | 0.00% | No change | 40,000 | $198K |
| Northern Trust Corp. | 0.00% | Add +46.4% | 37,681 | $186K |
| J.W. Cole Advisors, Inc. | 0.00% | Reduce -16.2% | 26,300 | $130K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 25,500 | $126K |
| Quantbot Technologies LP | 0.00% | New | 22,820 | $113K |
| Millennium Management | 0.00% | Reduce -53.4% | 22,507 | $111K |
| Hidden Cove Wealth Management, LLC | 0.07% | Add +50.2% | 21,087 | $104K |
| Gsa Capital Partners LLP | 0.01% | New | 19,432 | $96K |
| Pathstone Holdings, LLC | 0.00% | No change | 18,725 | $93K |
| Ark Wealth Advisors LLC | 0.08% | — | 14,881 | $74K |
| Shikiar Asset Management Inc. | 0.02% | Reduce -28.1% | 13,300 | $66K |
| Charles Schwab Investment Management Inc. | 0.00% | No change | 12,000 | $59K |
| Commonwealth Equity Services, LLC | 0.00% | New | 11,774 | $58K |
| Lighthouse Investment Partners, LLC | 0.00% | New | 10,920 | $54K |
| Bank of America Corp. | 0.00% | Add +123.0% | 10,784 | $53K |
| Citigroup Inc. | 0.00% | New | 8,535 | $42K |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -50.0% | 1,000 | $5K |
| Federation des caisses Desjardins du Quebec | 0.00% | New | 562 | $3K |
| State of Wyoming | 0.00% | Add +497.8% | 538 | $3K |
| Osaic Holdings, Inc. | 0.00% | No change | 500 | $2K |
| JPMorgan Chase & Co. | 0.00% | No change | 450 | $2K |
| National Bank of Canada | 0.00% | No change | 230 | $1K |
| BNP Paribas Financial Markets | 0.00% | New | 214 | $1K |
| SBI Securities Co., Ltd. | 0.00% | No change | 117 | $578 |
| NewEdge Advisors, LLC | 0.00% | Reduce -99.2% | 88 | $435 |
| MAI Capital Management | 0.00% | No change | 64 | $317 |
| Laurel Wealth Advisors LLC | 0.00% | New | 45 | $223 |
"% of holder's portfolio" is TGEN's weight in each manager's 13F, not the share of Tecogen Inc./Waltham Ma the manager owns.