ATLANTA, GA
PERMA FIX ENVIRONMENTAL SERVICES INCPESI— Latest position per institution from SEC 13F filings
15
Institutional holders
10.40M
Total shares held
137.27M
Estimated value
519.81K
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
1.25M
Value
17.90M
Filed
Jun 30, 2026
MAK CAPITAL ONE LLC
CIK 1385702
Shares
1.03M
Value
14.76M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
968.11K
Value
12.19M
Filed
Dec 31, 2025
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
853.16K
Value
8.64M
Filed
Jun 30, 2024
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
811.74K
Value
11.60M
Filed
Jun 30, 2026
PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C.
CIK 1166152
Shares
777.14K
Value
11.11M
Filed
Jun 30, 2026
DIAMOND HILL CAPITAL MANAGEMENT, LLC (INVESTMENT ADVISOR)
CIK 1217541
Shares
642.53K
Value
9.18M
Filed
Jun 30, 2026
KENNEDY CAPITAL MANAGEMENT LLC
CIK 884589
Shares
610.90K
Value
8.73M
Filed
Jun 30, 2026
POTOMAC CAPITAL MANAGEMENT, INC.
CIK 1418746
Shares
477K
Value
6.82M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
455.16K
Value
6.51M
Filed
Jun 30, 2026
AWM INVESTMENT COMPANY, INC.
CIK 1535264
Shares
400K
Value
4.43M
Filed
Dec 31, 2024
HEARTLAND ADVISORS INC
CIK 937394
Shares
400K
Value
5.72M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
349.74K
Value
5M
Filed
Jun 30, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
249.73K
Value
3.57M
Filed
Jun 30, 2026
VAN ECK ASSOCIATES CORP
CIK 869178
Shares
220.29K
Value
2.23K
Filed
Sep 30, 2025
ESSEX INVESTMENT MANAGEMENT CO LLC
CIK 201772
Shares
196.20K
Value
1.98M
Filed
Sep 30, 2025
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
191.06K
Value
2.73M
Filed
Jun 30, 2026
POLAR ASSET MANAGEMENT PARTNERS INC.
CIK 1326389
Shares
175K
Value
1.94M
Filed
Dec 31, 2024
CITADEL ADVISORS LLC
CIK 1423053
Shares
166.43K
Value
2.38M
Filed
Jun 30, 2026
PERRITT CAPITAL MANAGEMENT INC
CIK 1279342
Shares
166.30K
Value
2.09M
Filed
Dec 31, 2025
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 1.25M | 17.90M | Jun 30, 2026 |
| 2 | MAK CAPITAL ONE LLC | 1385702 | 1.03M | 14.76M | Jun 30, 2026 |
| 3 | VANGUARD GROUP INC | 102909 | 968.11K | 12.19M | Dec 31, 2025 |
| 4 | BLACKROCK FINANCE, INC. | 1364742 | 853.16K | 8.64M | Jun 30, 2024 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 811.74K | 11.60M | Jun 30, 2026 |
| 6 | PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. | 1166152 | 777.14K | 11.11M | Jun 30, 2026 |
| 7 | DIAMOND HILL CAPITAL MANAGEMENT, LLC (INVESTMENT ADVISOR) | 1217541 | 642.53K | 9.18M | Jun 30, 2026 |
| 8 | KENNEDY CAPITAL MANAGEMENT LLC | 884589 | 610.90K | 8.73M | Jun 30, 2026 |
| 9 | POTOMAC CAPITAL MANAGEMENT, INC. | 1418746 | 477K | 6.82M | Jun 30, 2026 |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 455.16K | 6.51M | Jun 30, 2026 |
| 11 | AWM INVESTMENT COMPANY, INC. | 1535264 | 400K | 4.43M | Dec 31, 2024 |
| 12 | HEARTLAND ADVISORS INC | 937394 | 400K | 5.72M | Jun 30, 2026 |
| 13 | STATE STREET CORP | 93751 | 349.74K | 5M | Jun 30, 2026 |
| 14 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 249.73K | 3.57M | Jun 30, 2026 |
| 15 | VAN ECK ASSOCIATES CORP | 869178 | 220.29K | 2.23K | Sep 30, 2025 |
| 16 | ESSEX INVESTMENT MANAGEMENT CO LLC | 201772 | 196.20K | 1.98M | Sep 30, 2025 |
| 17 | DIMENSIONAL FUND ADVISORS LP | 354204 | 191.06K | 2.73M | Jun 30, 2026 |
| 18 | POLAR ASSET MANAGEMENT PARTNERS INC. | 1326389 | 175K | 1.94M | Dec 31, 2024 |
| 19 | CITADEL ADVISORS LLC | 1423053 | 166.43K | 2.38M | Jun 30, 2026 |
| 20 | PERRITT CAPITAL MANAGEMENT INC | 1279342 | 166.30K | 2.09M | Dec 31, 2025 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.