NORTH BILLERICA, MA
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
PORTOLAN CAPITAL MANAGEMENT, LLC
CIK 1350290
Shares
1.55M
Value
8.10M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
871.84K
Value
4.31M
Filed
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
788.67K
Value
4.12M
Filed
Jun 30, 2026
BARD ASSOCIATES INC
CIK 1105907
Shares
682.22K
Value
3.56M
Filed
Jun 30, 2026
CLEAR HARBOR ASSET MANAGEMENT, LLC
CIK 1511857
Shares
650K
Value
3.39M
Filed
Jun 30, 2026
CITADEL ADVISORS LLC
CIK 1423053
Shares
585.58K
Value
3.06M
Filed
Jun 30, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
535.63K
Value
2.80M
Filed
Jun 30, 2026
PEAK6 LLC
CIK 1389958
Shares
471.90K
Value
2.46M
Filed
Jun 30, 2026
JANE STREET GROUP, LLC
CIK 1595888
Shares
434.29K
Value
2.27M
Filed
Jun 30, 2026
HERALD INVESTMENT MANAGEMENT LTD
CIK 1512022
Shares
420K
Value
2.19M
Filed
Jun 30, 2026
GRATIA CAPITAL, LLC
CIK 1599793
Shares
388.66K
Value
2.03M
Filed
Jun 30, 2026
UBS GROUP AG
CIK 1610520
Shares
363.05K
Value
1.90M
Filed
Jun 30, 2026
MEROS INVESTMENT MANAGEMENT, LP
CIK 1911372
Shares
353.49K
Value
1.85M
Filed
Jun 30, 2026
PALISADES INVESTMENT PARTNERS, LLC
CIK 1427373
Shares
323.09K
Value
1.69M
Filed
Jun 30, 2026
MORGAN STANLEY
CIK 895421
Shares
301.69K
Value
1.57M
Filed
Jun 30, 2026
RAYMOND JAMES FINANCIAL INC
CIK 720005
Shares
290.26K
Value
1.52M
Filed
Jun 30, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
272.30K
Value
697.09K
Filed
Mar 31, 2026
BLACKROCK, INC.
CIK 2012383
Shares
251.46K
Value
1.31M
Filed
Jun 30, 2026
HUNTLEIGH ADVISORS, INC.
CIK 1367653
Shares
220.07K
Value
1.15M
Filed
Jun 30, 2026
HEARTLAND ADVISORS INC
CIK 937394
Shares
182.10K
Value
950.56K
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | PORTOLAN CAPITAL MANAGEMENT, LLC | 1350290 | 1.55M | 8.10M | Jun 30, 2026 |
| 2 | VANGUARD GROUP INC | 102909 | 871.84K | 4.31M | Dec 31, 2025 |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 788.67K | 4.12M | Jun 30, 2026 |
| 4 | BARD ASSOCIATES INC | 1105907 | 682.22K | 3.56M | Jun 30, 2026 |
| 5 | CLEAR HARBOR ASSET MANAGEMENT, LLC | 1511857 | 650K | 3.39M | Jun 30, 2026 |
| 6 | CITADEL ADVISORS LLC | 1423053 | 585.58K | 3.06M | Jun 30, 2026 |
| 7 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 535.63K | 2.80M | Jun 30, 2026 |
| 8 | PEAK6 LLC | 1389958 | 471.90K | 2.46M | Jun 30, 2026 |
| 9 | JANE STREET GROUP, LLC | 1595888 | 434.29K | 2.27M | Jun 30, 2026 |
| 10 | HERALD INVESTMENT MANAGEMENT LTD | 1512022 | 420K | 2.19M | Jun 30, 2026 |
| 11 | GRATIA CAPITAL, LLC | 1599793 | 388.66K | 2.03M | Jun 30, 2026 |
| 12 | UBS GROUP AG | 1610520 | 363.05K | 1.90M | Jun 30, 2026 |
| 13 | MEROS INVESTMENT MANAGEMENT, LP | 1911372 | 353.49K | 1.85M | Jun 30, 2026 |
| 14 | PALISADES INVESTMENT PARTNERS, LLC | 1427373 | 323.09K | 1.69M | Jun 30, 2026 |
| 15 | MORGAN STANLEY | 895421 | 301.69K | 1.57M | Jun 30, 2026 |
| 16 | RAYMOND JAMES FINANCIAL INC | 720005 | 290.26K | 1.52M | Jun 30, 2026 |
| 17 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 272.30K | 697.09K | Mar 31, 2026 |
| 18 | BLACKROCK, INC. | 2012383 | 251.46K | 1.31M | Jun 30, 2026 |
| 19 | HUNTLEIGH ADVISORS, INC. | 1367653 | 220.07K | 1.15M | Jun 30, 2026 |
| 20 | HEARTLAND ADVISORS INC | 937394 | 182.10K | 950.56K | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.