HERALD INVESTMENT MANAGEMENT Ltd

Position in TGEN — Tecogen Inc.

CIK 1512022 LONDON, X0

Position in TGEN

as of Mar 31, 2026 · filed May 13, 2026 Compact

Position Value

$1,075,200

-$999,600 QoQ

Shares Held

420,000

0.0% QoQ

Ownership

1.40%

of shares outstanding

% of Portfolio

0.15%

of 13F equity value

Holder Rank

of 62 holders

Holding Since

Mar 2020

20 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Mar 31, 2026

HERALD INVESTMENT MANAGEMENT Ltd holds $10,970,000 across 3 Electrical Equipment & Parts names. TGEN ranks #2 (9.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ELVA	Electrovaya Inc.	1,150,000	$8,993,000
2	TGEN	Tecogen Inc. This page	420,000	$1,075,200
3	POWL	Powell Industries Inc	5,000	$901,800

20 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,075,200	420,000	0.0%	Shares	Sole	2026-05-13
2025-12-31	$2,074,800	420,000	-5.8%	Shares	Sole	2026-02-13
2025-09-30	$3,929,947	446,078	+38.9%	Shares	Sole	2025-11-07
2025-06-30	$2,183,330	321,078	0.0%	Shares	Sole	2025-07-22
2023-12-31	$260,073	321,078	0.0%	Shares	Sole	2024-02-14
2023-09-30	$272,916	321,078	0.0%	Shares	Sole	2023-11-13
2023-06-30	$321,078	321,078	0.0%	Shares	Sole	2023-07-25
2023-03-31	$381,440	321,078	0.0%	Shares	Sole	2023-05-04
2022-12-31	$401,347	321,078	0.0%	Shares	Sole	2023-02-14
2022-09-30	$305,024	321,078	0.0%	Shares	Sole	2022-11-07
2022-06-30	$362,818	321,078	0.0%	Shares	Sole	2022-08-04
2022-03-31	$529,778	321,078	0.0%	Shares	Sole	2022-05-16
2021-12-31	$385,293	321,078	0.0%	Shares	Sole	2022-02-15
2021-09-30	$581,151	321,078	0.0%	Shares	Sole	2021-11-12
2021-06-30	$600,415	321,078	0.0%	Shares	Sole	2021-08-13
2021-03-31	$545,832	321,078	0.0%	Shares	Sole	2021-05-14
2020-12-31	$391,715	321,078	0.0%	Shares	Sole	2021-02-16
2020-09-30	$292,502	321,078	0.0%	Shares	Sole	2020-11-12
2020-06-30	$224,754	321,078	0.0%	Shares	Sole	2020-08-07
2020-03-31	$298,602	321,078	—	Shares	Sole	2020-05-14
No filing history on record for this holder in this stock.