Tecogen Inc./Waltham MaTGEN
13F holders, Q2 2026 (June 30)69holders +7
20new positions
13sold out
3famous investors
$5.22avg. 13F price*
At the end of Q2 2026, 69 institutions reported holding Tecogen Inc./Waltham Ma (TGEN) in their 13F filings, up 7 from Q1 2026. 20 opened new positions and 13 sold out. The largest holders were Portolan Capital Management, LLC ($8.1M), Vanguard Capital Management LLC ($4.1M) and Bard Associates Inc. ($3.6M). 3 famous investors held it, including Mario Gabelli (0.0% of GAMCO Investors's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Tecogen Inc./Waltham Ma
- CUSIP
- 87876P201
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 20 | $5.1M |
| Exits | 13 | $1.4M |
All 13F filers, Q1 2026 → Q2 2026: 3,207,761 shares bought and 1,515,171 shares sold, net +1,692,590 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 69 holders
| Portolan Capital Management, LLC | 0.30% | Add +249.7% | 1,551,113 | $8.1M |
| Vanguard Capital Management LLC | 0.00% | Add +2.4% | 788,670 | $4.1M |
| Bard Associates Inc. | 0.79% | Reduce -0.9% | 682,221 | $3.6M |
| Clear Harbor Asset Management, LLC | 0.21% | No change | 650,000 | $3.4M |
| HERALD INVESTMENT MANAGEMENT Ltd | 0.30% | No change | 420,000 | $2.2M |
| Gratia Capital, LLC | 2.33% | New | 388,660 | $2.0M |
| UBS Group AG | 0.00% | Add +13.5% | 363,049 | $1.9M |
| Meros Investment Management, LP | 0.59% | Add +21.2% | 353,487 | $1.8M |
| Palisades Investment Partners, LLC | 0.48% | Reduce -3.2% | 323,090 | $1.7M |
| Susquehanna International Group, LLP | 0.00% | Add +188.5% | 315,831 | $1.6M |
| Morgan Stanley | 0.00% | Add +293.2% | 301,695 | $1.6M |
| Raymond James Financial Inc. | 0.00% | Add +56.2% | 290,260 | $1.5M |
| BlackRock, Inc. | 0.00% | Add +36.1% | 251,464 | $1.3M |
| Citadel Advisors | 0.00% | Add +64.3% | 242,276 | $1.3M |
| Huntleigh Advisors, Inc. | 0.16% | New | 220,074 | $1.1M |
| Heartland Advisors Inc. | 0.04% | New | 182,100 | $951K |
| Geode Capital Management, LLC | 0.00% | Reduce -5.8% | 180,870 | $945K |
| Thompson Davis & Co., Inc. | 0.45% | Add +46.3% | 144,840 | $756K |
| New York State Common Retirement Fund | 0.00% | No change | 137,200 | $716K |
| Gsa Capital Partners LLP | 0.04% | Add +34.3% | 126,451 | $660K |
| Arosa Capital Management LP | 0.58% | Reduce -64.3% | 125,000 | $653K |
| Integrated Wealth Concepts LLC | 0.00% | Reduce -48.7% | 112,080 | $585K |
| Apis Capital Advisors, LLC | 0.06% | Add +45.5% | 112,000 | $585K |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +9.9% | 105,956 | $553K |
| Goldman Sachs Group Inc. | 0.00% | Add +176.9% | 69,530 | $363K |
| State Street Corp. | 0.00% | No change | 69,226 | $361K |
| Diametric Capital, LP | 0.04% | Add +24.8% | 66,326 | $346K |
| PFG Investments, LLC | 0.01% | No change | 62,523 | $326K |
| IMC-Chicago, LLC | 0.00% | Add +352.8% | 61,800 | $323K |
| HRT Financial LP | 0.00% | Add +293.4% | 59,285 | $309K |
| Corsair Capital Management, L.P. | 0.04% | No change | 55,017 | $287K |
| Marshall Wace, LLP | 0.00% | Reduce -73.6% | 54,806 | $286K |
| Shikiar Asset Management Inc. | 0.08% | Add +206.2% | 54,050 | $282K |
| Group One Trading LLC | 0.01% | Reduce -40.6% | 49,872 | $260K |
| Gendell Jeffrey L | 0.00% | Reduce -79.7% | 49,823 | $260K |
| Jane Street Group, LLC | 0.00% | Reduce -58.2% | 49,087 | $256K |
| GAMCO Investors | 0.00% | No change | 40,000 | $209K |
| HighTower Advisors, LLC | 0.00% | Reduce -70.2% | 39,500 | $206K |
| Northern Trust Corp. | 0.00% | Reduce -0.3% | 37,569 | $196K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 33,048 | $173K |
| XTX Topco Ltd | 0.00% | New | 32,411 | $169K |
| Centiva Capital, LP | 0.00% | New | 27,528 | $144K |
| Crewe Advisors LLC | 0.01% | New | 23,000 | $120K |
| Gabelli Funds LLC | 0.00% | No change | 20,000 | $104K |
| Jefferies Financial Group Inc. | 0.00% | New | 19,300 | $101K |
| Pathstone Holdings, LLC | 0.00% | No change | 18,725 | $98K |
| Virtu Financial LLC | 0.00% | New | 16,377 | $85K |
| D. E. Shaw & Co. | 0.00% | New | 15,339 | $80K |
| Belvedere Trading LLC | 0.01% | New | 15,206 | $79K |
| Quadrature Capital Ltd | 0.00% | New | 14,061 | $73K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -15.5% | 13,624 | $71K |
| Wealthspire Advisors, LLC | 0.00% | New | 11,711 | $61K |
| Dimensional Fund Advisors LP | 0.00% | No change | 11,163 | $58K |
| Citizens Financial Group Inc. | 0.00% | No change | 10,000 | $52K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 5,434 | $28K |
| Persistent Asset Partners Ltd | 0.00% | New | 2,271 | $12K |
| Citigroup Inc. | 0.00% | New | 1,602 | $8K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | No change | 1,583 | $8K |
| Federation des caisses Desjardins du Quebec | 0.00% | No change | 562 | $3K |
| Simplex Trading, LLC | 0.00% | Reduce -98.8% | 479 | $3K |
| Northwestern Mutual Wealth Management Co. | 0.00% | New | 266 | $1K |
| Royal Bank of Canada | 0.00% | Reduce -92.8% | 227 | $1K |
| Fortitude Family Office, LLC | 0.00% | No change | 181 | $945 |
| Bogart Wealth, LLC | 0.00% | New | 118 | $616 |
| SBI Securities Co., Ltd. | 0.00% | Reduce -8.3% | 110 | $574 |
| Bare Financial Services, Inc | 0.00% | New | 103 | $538 |
| FMR LLC | 0.00% | New | 53 | $279 |
| Hollencrest Capital Management | 0.00% | New | 15 | $78 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 1 | $5 |
"% of holder's portfolio" is TGEN's weight in each manager's 13F, not the share of Tecogen Inc./Waltham Ma the manager owns.