WOOD DALE, IL
POWER SOLUTIONS INTERNATIONAL, INC.PSIX— Latest position per institution from SEC 13F filings
15
Institutional holders
6M
Total shares held
349.73M
Estimated value
300.22K
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
715.56K
Value
43.56M
Filed
Mar 31, 2026
VANGUARD GROUP INC
CIK 102909
Shares
539.98K
Value
30.85M
Filed
Dec 31, 2025
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 1164508
Shares
466.20K
Value
28.38M
Filed
Mar 31, 2026
SITUATIONAL AWARENESS PARTNERS LP
CIK 2038540
Shares
432.30K
Value
26.32M
Filed
Mar 31, 2026
SITUATIONAL AWARENESS LP
CIK 2045724
Shares
432.30K
Value
26.32M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
340.97K
Value
20.76M
Filed
Mar 31, 2026
ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC
CIK 1890906
Shares
301.17K
Value
19.93M
Filed
Mar 31, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
283.24K
Value
17.24M
Filed
Mar 31, 2026
MARSHALL WACE, LLP
CIK 1318757
Shares
263.12K
Value
6.65M
Filed
Mar 31, 2025
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
258.49K
Value
15.74M
Filed
Mar 31, 2026
BARCLAYS PLC
CIK 312069
Shares
239.05K
Value
14.55M
Filed
Mar 31, 2026
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 938206
Shares
229.12K
Value
13.09M
Filed
Dec 31, 2025
BUSEY BANK
CIK 1427202
Shares
220K
Value
13.39M
Filed
Mar 31, 2026
SG AMERICAS SECURITIES, LLC
CIK 1313360
Shares
216.40K
Value
13.17K
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
196.30K
Value
11.95M
Filed
Mar 31, 2026
PORTOLAN CAPITAL MANAGEMENT, LLC
CIK 1350290
Shares
195.80K
Value
19.23M
Filed
Sep 30, 2025
GAGNON ADVISORS, LLC
CIK 1599466
Shares
180.41K
Value
11.67M
Filed
Jun 30, 2025
STATE STREET CORP
CIK 93751
Shares
170.75K
Value
10.40M
Filed
Mar 31, 2026
MORGAN STANLEY
CIK 895421
Shares
167.04K
Value
10.17M
Filed
Mar 31, 2026
LPL FINANCIAL LLC
CIK 1403438
Shares
156.19K
Value
9.51M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 715.56K | 43.56M | Mar 31, 2026 |
| 2 | VANGUARD GROUP INC | 102909 | 539.98K | 30.85M | Dec 31, 2025 |
| 3 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1164508 | 466.20K | 28.38M | Mar 31, 2026 |
| 4 | SITUATIONAL AWARENESS PARTNERS LP | 2038540 | 432.30K | 26.32M | Mar 31, 2026 |
| 5 | SITUATIONAL AWARENESS LP | 2045724 | 432.30K | 26.32M | Mar 31, 2026 |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 340.97K | 20.76M | Mar 31, 2026 |
| 7 | ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC | 1890906 | 301.17K | 19.93M | Mar 31, 2026 |
| 8 | DIMENSIONAL FUND ADVISORS LP | 354204 | 283.24K | 17.24M | Mar 31, 2026 |
| 9 | MARSHALL WACE, LLP | 1318757 | 263.12K | 6.65M | Mar 31, 2025 |
| 10 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 258.49K | 15.74M | Mar 31, 2026 |
| 11 | BARCLAYS PLC | 312069 | 239.05K | 14.55M | Mar 31, 2026 |
| 12 | DRIEHAUS CAPITAL MANAGEMENT LLC | 938206 | 229.12K | 13.09M | Dec 31, 2025 |
| 13 | BUSEY BANK | 1427202 | 220K | 13.39M | Mar 31, 2026 |
| 14 | SG AMERICAS SECURITIES, LLC | 1313360 | 216.40K | 13.17K | Mar 31, 2026 |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 196.30K | 11.95M | Mar 31, 2026 |
| 16 | PORTOLAN CAPITAL MANAGEMENT, LLC | 1350290 | 195.80K | 19.23M | Sep 30, 2025 |
| 17 | GAGNON ADVISORS, LLC | 1599466 | 180.41K | 11.67M | Jun 30, 2025 |
| 18 | STATE STREET CORP | 93751 | 170.75K | 10.40M | Mar 31, 2026 |
| 19 | MORGAN STANLEY | 895421 | 167.04K | 10.17M | Mar 31, 2026 |
| 20 | LPL FINANCIAL LLC | 1403438 | 156.19K | 9.51M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.