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Livermore
Livermore
ZHEN

Tecogen Inc.

TGEN
Exchange
NYSE
Industry
Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip
SEC CIK
0001537435

No open-market purchases or sales by Tecogen Inc. insiders were filed in the last 90 days; 69 institutions reported holding it in 13F filings for Q2 2026, worth $49.5M in total; no superinvestor holds it.

Q3 2025 vs. Q2 2025

How the institutions holding Tecogen Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025All holders in Q2 2025

13F holders of TGEN: Q2 2025 compared with Q3 2025
MeasureQ2 2025Q3 2025Change
Holders3070+40
Shares3.87M7.73M+3.86M (+99.9%)
Value$26.4M$68.0M+$41.6M (+157.6%)

New holders (42)

Institutions that held Tecogen Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to TGEN in Q3 2025
InstitutionSharesValue% of portfolio
Palisades Investment Partners, LLC376,594$3.32M1.30%
Arosa Capital Management LP287,500$2.53M3.90%
Susquehanna International Group, LLP252,035$2.22M0.00%
Two Sigma Investments, LP246,705$2.17M0.00%
Citadel Advisors LLC213,708$1.88M0.00%
Raymond James Financial Inc157,888$1.39M0.00%
Apis Capital Advisors, LLC153,000$1.35M0.30%
New York State Common Retirement Fund137,200$1.21M0.00%
Goldman Sachs Group Inc132,762$1.17M0.00%
Thompson Davis & Co., Inc.117,953$1.04M0.64%
Granahan Investment Management Inc112,338$989.7K0.04%
Renaissance Technologies LLC102,200$900.4K0.00%
Russell Investments Group, Ltd.94,696$834.3K0.00%
Jane Street Group, LLC93,110$820.3K0.00%
EAM Investors, LLC74,101$652.8K0.07%
Manatuck Hill Partners, LLC50,000$440.5K0.15%
Marshall Wace, LLP49,089$432.5K0.00%
Millennium Management LLC48,245$425.0K0.00%
ARS Investment Partners, LLC43,173$380.4K0.03%
Two Sigma Advisers, LP36,200$318.9K0.00%
Evernest Financial Advisors, LLC34,150$300.9K0.08%
Group One Trading, L.P.33,952$299.1K0.01%
Simplex Trading, LLC31,562$278.0K0.01%
J.W. Cole Advisors, Inc.31,400$276.6K0.01%
Diametric Capital, LP30,741$270.8K0.10%
Harbor Capital Advisors, Inc.27,481$242.0K0.02%
Bridgeway Capital Management, LLC25,500$224.7K0.00%
Virtu Financial LLC20,036$177.0K0.01%
Wolverine Trading, LLC17,495$143.6K0.00%
Marex Group plc14,700$129.5K0.00%
Hidden Cove Wealth Management, LLC14,042$123.7K0.08%
Rockefeller Capital Management L.P.12,500$110.1K0.00%
Calamos Advisors LLC12,479$109.9K0.00%
Charles Schwab Investment Management Inc12,000$105.7K0.00%
GWM Advisors LLC10,300$90.7K0.00%
CoreCap Advisors, LLC4,944$43.6K0.00%
EverSource Wealth Advisors, LLC2,000$17.6K0.00%
Altshuler Shaham Ltd1,500$13.2K0.00%
Advisor Group Holdings, Inc.500$3.82K0.00%
National Bank of Canada230$2.01K0.00%
State of Wyoming90$7930.00%
ORG Partners LLC50$4400.00%

Sold out (2)

Institutions that held Tecogen Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of TGEN in Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
Global Retirement Partners, LLC5,145$35.0K
Lazard Asset Management LLC1,329$9.00K