TECOGEN INC.

PublicCIK: 1537435
TGENNYSE
Location

NORTH BILLERICA, MA

13F Filings

Institutional Holders

TECOGEN INC.TGEN— Latest position per institution from SEC 13F filings

15

Institutional holders

9.94M

Total shares held

50.90M

Estimated value

496.87K

Avg. position size

1

PORTOLAN CAPITAL MANAGEMENT, LLC

CIK 1350290

Shares

1.55M

Value

8.10M

Filed

Jun 30, 2026

2

VANGUARD GROUP INC

CIK 102909

Shares

871.84K

Value

4.31M

Filed

Dec 31, 2025

3

VANGUARD CAPITAL MANAGEMENT LLC

CIK 2100119

Shares

788.67K

Value

4.12M

Filed

Jun 30, 2026

4

BARD ASSOCIATES INC

CIK 1105907

Shares

682.22K

Value

3.56M

Filed

Jun 30, 2026

5

CLEAR HARBOR ASSET MANAGEMENT, LLC

CIK 1511857

Shares

650K

Value

3.39M

Filed

Jun 30, 2026

6

CITADEL ADVISORS LLC

CIK 1423053

Shares

585.58K

Value

3.06M

Filed

Jun 30, 2026

7

SUSQUEHANNA INTERNATIONAL GROUP, LLP

CIK 1446194

Shares

535.63K

Value

2.80M

Filed

Jun 30, 2026

8

PEAK6 LLC

CIK 1389958

Shares

471.90K

Value

2.46M

Filed

Jun 30, 2026

9

JANE STREET GROUP, LLC

CIK 1595888

Shares

434.29K

Value

2.27M

Filed

Jun 30, 2026

10

HERALD INVESTMENT MANAGEMENT LTD

CIK 1512022

Shares

420K

Value

2.19M

Filed

Jun 30, 2026

11

GRATIA CAPITAL, LLC

CIK 1599793

Shares

388.66K

Value

2.03M

Filed

Jun 30, 2026

12

UBS GROUP AG

CIK 1610520

Shares

363.05K

Value

1.90M

Filed

Jun 30, 2026

13

MEROS INVESTMENT MANAGEMENT, LP

CIK 1911372

Shares

353.49K

Value

1.85M

Filed

Jun 30, 2026

14

PALISADES INVESTMENT PARTNERS, LLC

CIK 1427373

Shares

323.09K

Value

1.69M

Filed

Jun 30, 2026

15

MORGAN STANLEY

CIK 895421

Shares

301.69K

Value

1.57M

Filed

Jun 30, 2026

16

RAYMOND JAMES FINANCIAL INC

CIK 720005

Shares

290.26K

Value

1.52M

Filed

Jun 30, 2026

17

RENAISSANCE TECHNOLOGIES LLC

CIK 1037389

Shares

272.30K

Value

697.09K

Filed

Mar 31, 2026

18

BLACKROCK, INC.

CIK 2012383

Shares

251.46K

Value

1.31M

Filed

Jun 30, 2026

19

HUNTLEIGH ADVISORS, INC.

CIK 1367653

Shares

220.07K

Value

1.15M

Filed

Jun 30, 2026

20

HEARTLAND ADVISORS INC

CIK 937394

Shares

182.10K

Value

950.56K

Filed

Jun 30, 2026

Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.