TECOGEN INC.

TGENNYSE

$2.54-0.11 (-4.15%)as of Oct 5, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

TECOGEN INC. price and activity chart data

Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-74.1%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
Portolan Capital Management, LLC	5.14%	$8.1M	0.30%	Add 249.70%
Vanguard Capital Management LLC	2.61%	$4.12M	0.00%	Not reported
Bard Associates Inc	2.26%	$3.56M	0.79%	Reduce 0.88%
Clear Harbor Asset Management, LLC	2.15%	$3.39M	0.21%	Not reported
HERALD INVESTMENT MANAGEMENT Ltd	1.39%	$2.19M	0.30%	Not reported
Gratia Capital, LLC	1.29%	$2.03M	1.23%	New Not reported
UBS Group AG	1.20%	$1.9M	0.00%	Not reported
Meros Investment Management, LP	1.17%	$1.85M	0.59%	Add 21.18%
Palisades Investment Partners, LLC	1.07%	$1.69M	0.48%	Reduce 3.24%
Susquehanna International Group, LLP	1.05%	$1.65M	0.00%	Not reported
Morgan Stanley	1.00%	$1.57M	0.00%	Not reported
Raymond James Financial Inc	0.96%	$1.52M	0.00%	Not reported
BlackRock, Inc.	0.83%	$1.31M	0.00%	Not reported
Citadel Advisors LLC	0.80%	$1.26M	0.00%	Not reported
Huntleigh Advisors, Inc.	0.73%	$1.15M	0.16%	New Not reported
Heartland Advisors Inc	0.60%	$951K	0.04%	New Not reported
Geode Capital Management, LLC	0.60%	$945K	0.00%	Not reported
Thompson Davis & Co., Inc.	0.48%	$756K	0.45%	Not reported
New York State Common Retirement Fund	0.45%	$716K	0.00%	Not reported
Gsa Capital Partners LLP	0.42%	$660K	0.04%	Not reported
Arosa Capital Management LP	0.41%	$653K	0.12%	Reduce 64.29%
Integrated Wealth Concepts LLC	0.37%	$585K	0.00%	Not reported
Apis Capital Advisors, LLC	0.37%	$585K	0.06%	Add 45.45%
Vanguard Fiduciary Trust Co	0.35%	$553K	0.00%	Not reported
Goldman Sachs Group Inc	0.23%	$363K	0.00%	Not reported
State Street Corp	0.23%	$361K	0.00%	Not reported
Diametric Capital, LP	0.22%	$346K	0.04%	Not reported
PFG Investments, LLC	0.21%	$326K	0.01%	Not reported
IMC-Chicago, LLC	0.20%	$323K	0.00%	Add 352.75%
Corsair Capital Management, L.P.	0.18%	$287K	0.04%	Not reported
Marshall Wace, LLP	0.18%	$286K	0.00%	Not reported
Shikiar Asset Management Inc	0.18%	$282K	0.07%	Add 206.23%
Gendell Jeffrey L	0.17%	$260K	0.00%	Reduce 79.71%
Jane Street Group, LLC	0.16%	$256K	0.00%	Not reported
Gamco Investors, Inc. Et Al	0.13%	$209K	0.00%	Not reported
HighTower Advisors, LLC	0.13%	$206K	0.00%	Not reported
Northern Trust Corp	0.12%	$196K	0.00%	Not reported
Bridgeway Capital Management, LLC	0.11%	$173K	0.00%	Not reported
XTX Topco Ltd	0.11%	$169K	0.00%	Not reported
Centiva Capital, LP	0.09%	$144K	0.00%	Not reported
Crewe Advisors LLC	0.08%	$120K	0.01%	Not reported
Gabelli Funds LLC	0.07%	$104K	0.00%	Not reported
Jefferies Financial Group Inc.	0.06%	$101K	0.00%	New Not reported
Pathstone Holdings, LLC	0.06%	$97.7K	0.00%	Not reported
Virtu Financial LLC	0.05%	$85K	0.00%	Not reported
D. E. Shaw & Co., Inc.	0.05%	$80.1K	0.00%	Not reported
Belvedere Trading LLC	0.05%	$79.4K	0.00%	Not reported
Quadrature Capital Ltd	0.05%	$73.4K	0.00%	Not reported
Commonwealth Equity Services, LLC	0.05%	$71.1K	0.00%	Not reported
Wealthspire Advisors, LLC	0.04%	$61.1K	0.00%	Not reported

50 of 66 holders

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