Tecogen TGEN Institutional Ownership

NYSE TGEN

$3.09 -0.14 (-4.25%)

As of: Sep 9, 2026 · 3:59 PM EDT

Institutions by Trading Activity

69 Institutions

Increased 38 55.1%

Unchanged 16 23.2%

Reduced 15 21.7%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

31.60%

▲+5.54 pp QoQ

Shares Held by Institutions

9.48Mn

of 30.00Mn outstanding

▲+31.26% QoQ

Shares Outstanding

30.00Mn

20.52Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▲+8 vs prior quarter

Net Shares Added (QoQ)

+2.26Mn

accumulated since last quarter

Value of Holdings

$29.87Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Tecogen Inc. (NYSE:TGEN) showed up in the 13F filings of 69 institutional investors as of June 2026.

Collectively, these holders controlled 31.6% of Tecogen's outstanding shares in June 2026, up from 26.1% in March 2026.
They increased total shares held in TGEN by 31.26% quarter over quarter, and investors in Tecogen increased 130.0% from a year ago.
Of these 69 holders, 38 added to their stakes in Tecogen, 15 trimmed positions, and 16 made no changes.
The aggregate institutional position in Tecogen amounted to 9.48Mn shares as of June 2026, up by 2.26Mn shares quarter on quarter, and up 5.49Mn shares year over year.
Portolan Capital Management, LLC is the top holder of Tecogen as of June 30, 2026, with 1.55Mn shares representing 5.17% of outstanding stock.
The largest buyers of Tecogen for the quarter ending June 2026 were Portolan Capital Management, LLC (1.11Mn), GRATIA CAPITAL, LLC (388.66K), Morgan Stanley (224.96K), Huntleigh Advisors, Inc. (220.07K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (206.37K).
The largest sales of TGEN for the quarter ending June 2026 came from Arosa Capital Management LP (225.0K), GENDELL JEFFREY L (195.72K), MARSHALL WACE, LLP (152.66K), Integrated Wealth Concepts LLC (106.3K), HighTower Advisors, LLC (93.16K).
Business Quant data shows the 10 biggest positions in Tecogen as of June 2026 are held by Portolan Capital Management, LLC (1.55Mn), VANGUARD CAPITAL MANAGEMENT LLC (788.67K), BARD ASSOCIATES INC (682.22K), Clear Harbor Asset Management, LLC (650.0K), HERALD INVESTMENT MANAGEMENT Ltd (420.0K), GRATIA CAPITAL, LLC (388.66K), UBS Group AG (363.05K), Meros Investment Management, LP (353.49K), Palisades Investment Partners, LLC (323.09K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (315.83K).

Form 13F Holdings

69 Institutional Holders

Report period 30 Jun, 2026

Total shares held 9.48Mn

Of outstanding 31.60%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Portolan Capital Management, LLC	0001350290	1,551,113	5.17%	▲1,107,558	+249.70%	$8.10Mn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	788,670	2.63%	▲18,706	+2.43%	$4.12Mn
3	BARD ASSOCIATES INC	0001105907	682,221	2.27%	▼6,088	-0.88%	$3.56Mn
4	Clear Harbor Asset Management, LLC	0001511857	650,000	2.17%	0	0.00%	$3.39Mn
5	HERALD INVESTMENT MANAGEMENT Ltd	0001512022	420,000	1.40%	0	0.00%	$2.19Mn
6	GRATIA CAPITAL, LLC	0001599793	388,660	1.30%	▲388,660	0.00%	$2.03Mn
7	UBS Group AG	0001610520	363,049	1.21%	▲43,213	+13.51%	$1.90Mn
8	Meros Investment Management, LP	0001911372	353,487	1.18%	▲61,782	+21.18%	$1.85Mn
9	Palisades Investment Partners, LLC	0001427373	323,090	1.08%	▼10,817	-3.24%	$1.69Mn
10	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0001446194	315,831	1.05%	▲206,374	+188.54%	$1.65Mn
11	Morgan Stanley	0000895421	301,695	1.01%	▲224,959	+293.16%	$1.57Mn
12	Raymond James Financial Inc	0000720005	290,260	0.97%	▲104,466	+56.23%	$1.52Mn
13	BlackRock, Inc.	0002012383	251,464	0.84%	▲66,685	+36.09%	$1.31Mn
14	CITADEL ADVISORS LLC	0001423053	242,276	0.81%	▲94,804	+64.29%	$1.26Mn
15	Huntleigh Advisors, Inc.	0001367653	220,074	0.73%	▲220,074	0.00%	$1.15Mn
16	HEARTLAND ADVISORS INC	0000937394	182,100	0.61%	▲182,100	0.00%	$950.56K
17	GEODE CAPITAL MANAGEMENT, LLC	0001214717	180,870	0.60%	▼11,132	-5.80%	$944.80K
18	THOMPSON DAVIS & CO., INC.	0001017284	144,840	0.48%	▲45,840	+46.30%	$755.86K
19	NEW YORK STATE COMMON RETIREMENT FUND	0000810265	137,200	0.46%	0	0.00%	$716.18K
20	GSA CAPITAL PARTNERS LLP	0001362033	126,451	0.42%	▲32,281	+34.28%	$660

Showing 1 to 20 of 69 holders