GAMCO Investors’s Tecogen Inc TGEN Stock Holding History

GAMCO Investors’s Portfolio TGEN Stock Details TGEN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$102K	Hold	40,000	–	–	﹤0.01%	990
2025 Q4	$198K	Hold	40,000	–	–	﹤0.01%	1004
2025 Q3	$352K	Sell	40,000 -2,000	-5%	-$16K	﹤0.01%	886
2025 Q2	$286K	Buy	+42,000	New	+$218K	﹤0.01%	942
2020 Q3	–	Sell	-46,430	Closed	-$33K	–	903
2020 Q2	$33K	Hold	46,430	–	–	﹤0.01%	851
2020 Q1	$43K	Hold	46,430	–	–	﹤0.01%	854
2019 Q4	$98K	Hold	46,430	–	–	﹤0.01%	895
2019 Q3	$111K	Hold	46,430	–	–	﹤0.01%	894
2019 Q2	$174K	Hold	46,430	–	–	﹤0.01%	892
2019 Q1	$185K	Hold	46,430	–	–	﹤0.01%	817
2018 Q4	$169K	Hold	46,430	–	–	﹤0.01%	768
2018 Q3	$146K	Hold	46,430	–	–	﹤0.01%	811
2018 Q2	$173K	Hold	46,430	–	–	﹤0.01%	825
2018 Q1	$133K	Hold	46,430	–	–	﹤0.01%	817
2017 Q4	$125K	Sell	46,430 -21,330	-31%	-$59.3K	﹤0.01%	823
2017 Q3	$216K	Hold	67,760	–	–	﹤0.01%	801
2017 Q2	$226K	Buy	67,760 +25,760	+61%	+$92.4K	﹤0.01%	792
2017 Q1	$159K	Sell	42,000 -4,000	-9%	-$15.7K	﹤0.01%	815
2016 Q4	$193K	Hold	46,000	–	–	﹤0.01%	781
2016 Q3	$191K	Sell	46,000 -3,300	-7%	-$15.5K	﹤0.01%	778
2016 Q2	$251K	Sell	49,300 -700	-1%	-$3.04K	﹤0.01%	758
2016 Q1	$196K	Sell	50,000 -10,000	-17%	-$38K	﹤0.01%	761
2015 Q4	$210K	Sell	60,000 -4,000	-6%	-$14.2K	﹤0.01%	765
2015 Q3	$221K	Sell	64,000 -1,000	-2%	-$3.93K	﹤0.01%	777
2015 Q2	$267K	Sell	65,000 -15,000	-19%	-$67.7K	﹤0.01%	764
2015 Q1	$406K	Sell	80,000 -5,000	-6%	-$25.3K	﹤0.01%	727
2014 Q4	$444K	Sell	85,000 -11,047	-12%	-$63.6K	﹤0.01%	739
2014 Q3	$538K	Hold	96,047	–	–	﹤0.01%	727
2014 Q2	$767K	Buy	+96,047	New	+$846K	﹤0.01%	681

Other funds holding TGEN

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Bard Associates Chicago, Illinois $398M AUM 54.32% 1-Year Est. Return

CHAM

Clear Harbor Asset Management Stamford, Connecticut $1.45B AUM 23.7% 1-Year Est. Return

PCM

Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 1-Year Est. Return

HIM

Herald Investment Management London, United Kingdom $718M AUM 91.16% 1-Year Est. Return

ACM

Arosa Capital Management Miami Beach, Florida $660M AUM 210.26% 1-Year Est. Return

PIP

Palisades Investment Partners Santa Monica, California $255M AUM 50.52% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

MIM

Meros Investment Management Dallas, Texas $231M AUM 35.94% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

GAMCO Investors's TGEN Position: Q1 2026 in Review

GAMCO Investors held its Tecogen Inc (TGEN) position steady in Q1 2026 at 40,000 shares worth $102K. The position accounts for ﹤0.01% of the portfolio, ranked #990.

GAMCO Investors first reported a position in TGEN in Q2 2014 and has held it in 29 quarters since. The position peaked at $767K in Q2 2014. 62 funds tracked by Wall St. Rank hold TGEN as of Q1 2026.

GAMCO Investors held 40,000 shares of Tecogen Inc worth $102K as of Q1 2026.
GAMCO Investors left its Tecogen Inc share count unchanged in Q1 2026.
Tecogen Inc made up ﹤0.01% of GAMCO Investors's portfolio in Q1 2026, its #990 holding.
GAMCO Investors first reported a position in Tecogen Inc in Q2 2014 and has held it in 29 quarters since.
GAMCO Investors's Tecogen Inc position peaked at $767K in Q2 2014.
62 funds tracked by Wall St. Rank held Tecogen Inc as of Q1 2026.

Based on GAMCO Investors's 13F filing for Q1 2026, filed 14 May 2026.