Tecogen Inc. (TGEN) Institutional Ownership

Institutions by Trading Activity

28,817,040Shares Outstanding

7,687,306Shares held by institutions

$36,591,577Value of institutional holdings

26.68%Institutional ownership %

1.93%Shares Changed QoQ

66No. of institutional investors

Tecogen Inc. (NYSE:TGEN) showed up in the 13F filings of 66 institutional investors as of December 2025.

These investors collectively held 26.4% of Tecogen's outstanding shares in December 2025, down from 29.0% in September 2025.
They increased total shares held in TGEN by 1.78% quarter over quarter, and investors in Tecogen stayed flat from a year ago.
Among the 66 funds, 39 bought more Tecogen shares, 17 sold down, and 10 held their ground.
Altogether, these fund groups held 7.62Mn shares in TGEN by December 2025, up by 132.97K shares quarter on quarter, and up 7.3Mn shares year over year.
THOMPSON DAVIS & CO., INC. leads ownership in TGEN with 99.0K shares as of December 31, 2025, equal to 0.34% of outstanding shares.
The most significant purchases of TGEN for the quarter ending December 2025 came from SHIKIAR ASSET MANAGEMENT INC (4.35K), Fortitude Family Office, LLC (181).
Leading sellers of Tecogen shares for the quarter ending December 2025 were THOMPSON DAVIS & CO., INC. (21.45K).
Per Business Quant data, the top 3 holders of Tecogen for the quarter ending December 2025 are THOMPSON DAVIS & CO., INC. (99.0K), SHIKIAR ASSET MANAGEMENT INC (17.65K), Fortitude Family Office, LLC (181).

7,687,306 Total Shares Held

Rows:

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	871,840	1,400	0.16%	$4,306,889.00
BARD ASSOCIATES INC	31 Dec, 2025	689,107	-1,504	-0.22%	$3,404,189.00
Clear Harbor Asset Management, LLC	31 Dec, 2025	610,000	-613,200	-50.13%	$3,013,400.00
Portolan Capital Management, LLC	31 Dec, 2025	445,810	-149,996	-25.18%	$2,202,301.00
HERALD INVESTMENT MANAGEMENT Ltd	31 Dec, 2025	420,000	-26,078	-5.85%	$2,083,200.00
Palisades Investment Partners, LLC	31 Dec, 2025	390,212	13,618	3.62%	$1,927,647.00
Arosa Capital Management LP	31 Dec, 2025	350,000	62,500	21.74%	$1,729,000.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	302,911	50,876	20.19%	$1,496,380.00
GENDELL JEFFREY L	31 Dec, 2025	295,541	51,919	21.31%	$1,459,973.00
MARSHALL WACE, LLP	31 Dec, 2025	286,325	237,236	483.28%	$1,414,446.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	218,628	-28,077	-11.38%	$1,080,022.00
JANE STREET GROUP, LLC	31 Dec, 2025	207,607	114,497	122.97%	$1,025,578.00
BlackRock, Inc.	31 Dec, 2025	191,360	6,581	3.56%	$945,318.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	177,914	11,357	6.82%	$879,452.00
Granahan Investment Management, LLC	31 Dec, 2025	177,822	65,484	58.29%	$878,441.00
NEW YORK STATE COMMON RETIREMENT FUND	31 Dec, 2025	137,200	0	0.00%	$677,768.00
Goldman Sachs Group Inc	31 Dec, 2025	135,448	2,686	2.02%	$669,114.00
HighTower Advisors, LLC	31 Dec, 2025	132,665	69,598	110.36%	$655,366.00
THOMPSON DAVIS & CO., INC.	31 Dec, 2025	120,450	2,497	2.12%	$595,023.00
UBS Group AG	31 Dec, 2025	104,959	95,371	994.69%	$518,498.00

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