TECOGEN INC/WALTHAM MA (TGEN) Institutional Ownership Changes & 13F Activity

TECOGEN INC/WALTHAM MA (TGEN). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Portolan Capital Management, Llc, Gratia Capital, Llc, Arosa Capital Management Lp, Morgan Stanley, and Susquehanna International Group, Llp.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Integrated Wealth Concepts LlcSell-106,300-48.7%112,080$585.06KQ2 2026Sep 09, 2026
Citadel Advisors LlcBuy+94,804+64.3%242,276$1.26MQ2 2026Sep 02, 2026
Jefferies Financial Group Inc.Buy+19,30019,300$100.75KQ2 2026Aug 17, 2026
Portolan Capital Management, LlcBuy+1,107,558+249.7%1,551,113$8.10MQ2 2026Aug 14, 2026
Gratia Capital, LlcBuy+388,660388,660$2.03MQ2 2026Aug 14, 2026
Arosa Capital Management LpSell-225,000-64.3%125,000$652.50KQ2 2026Aug 14, 2026
Susquehanna International Group, LlpBuy+206,374+188.5%315,831$1.65MQ2 2026Aug 14, 2026
Gendell Jeffrey LSell-195,718-79.7%49,823$260.08KQ2 2026Aug 14, 2026
Raymond James Financial IncBuy+104,466+56.2%290,260$1.52MQ2 2026Aug 14, 2026
Jane Street Group, LlcSell-68,255-58.2%49,087$256.23KQ2 2026Aug 14, 2026
Meros Investment Management, LpBuy+61,782+21.2%353,487$1.85MQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+44,424+176.9%69,530$362.95KQ2 2026Aug 14, 2026
Hrt Financial LpBuy+44,214+293.4%59,285$309.00KQ2 2026Aug 14, 2026
Apis Capital Advisors, LlcBuy+35,000+45.5%112,000$584.64KQ2 2026Aug 14, 2026
Group One Trading LlcSell-34,050-40.6%49,872$260.33KQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+32,41132,411$169.19KQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Buy+15,33915,339$80.07KQ2 2026Aug 14, 2026
Diametric Capital, LpBuy+13,195+24.8%66,326$346.22KQ2 2026Aug 14, 2026
Royal Bank Of CanadaSell-2,916-92.8%227$1.00KQ2 2026Aug 14, 2026
Morgan StanleyBuy+224,959+293.2%301,695$1.57MQ2 2026Aug 13, 2026
Marshall Wace, LlpSell-152,661-73.6%54,806$286.09KQ2 2026Aug 13, 2026
Ubs Group AgBuy+43,213+13.5%363,049$1.90MQ2 2026Aug 13, 2026
Centiva Capital, LpBuy+27,52827,528$143.70KQ2 2026Aug 13, 2026
Vanguard Capital Management LlcBuy+18,706+2.4%788,670$4.12MQ2 2026Aug 13, 2026
Virtu Financial LlcBuy+16,37716,377$85.00KQ2 2026Aug 13, 2026
Vanguard Fiduciary Trust CoBuy+9,514+9.9%105,956$553.09KQ2 2026Aug 13, 2026
Northern Trust CorpSell-112-0.3%37,569$196.11KQ2 2026Aug 13, 2026
Fmr LlcBuy+5353$279.00Q2 2026Aug 13, 2026
Hollencrest Capital ManagementBuy+1515$78.00Q2 2026Aug 13, 2026
Simplex Trading, LlcSell-40,853-98.8%479$2.50KQ2 2026Aug 12, 2026
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Frequently asked questions about TGEN activity

  • Which institutional owners are buying TGEN?

    Institutional owners buying TGEN include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in TGEN activity?

    "Buy" means an investor increased their reported position in TGEN compared to the prior reporting period. This reflects growing exposure to TECOGEN INC/WALTHAM MA (TGEN) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in TGEN increasing?

    Institutional interest in TGEN can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.