TULSA, OK
MATRIX SERVICE COMTRX— Latest position per institution from SEC 13F filings
15
Institutional holders
21.20M
Total shares held
261.47M
Estimated value
1.06M
Avg. position size
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
3.35M
Value
33.28M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
2.14M
Value
29.31M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
1.53M
Value
17.86M
Filed
Dec 31, 2025
NEEDHAM INVESTMENT MANAGEMENT LLC
CIK 1167212
Shares
1.44M
Value
19.66M
Filed
Jun 30, 2026
AMERICAN CENTURY COMPANIES INC
CIK 748054
Shares
1.21M
Value
16.53M
Filed
Jun 30, 2026
GENDELL JEFFREY L
CIK 1056581
Shares
1.19M
Value
16.34M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.19M
Value
16.28M
Filed
Jun 30, 2026
ACK ASSET MANAGEMENT LLC
CIK 1510940
Shares
1.09M
Value
14.69M
Filed
Jun 30, 2025
FIRST EAGLE INVESTMENT MANAGEMENT, LLC
CIK 1325447
Shares
990.22K
Value
13.57M
Filed
Jun 30, 2026
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
871.50K
Value
11.93K
Filed
Jun 30, 2026
HARVEY PARTNERS, LLC
CIK 1406484
Shares
815.02K
Value
11.17M
Filed
Jun 30, 2026
TWO SIGMA INVESTMENTS, LP
CIK 1179392
Shares
748.12K
Value
10.25M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
721.32K
Value
9.89M
Filed
Jun 30, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
665.27K
Value
9.11M
Filed
Jun 30, 2026
WESTERLY CAPITAL MANAGEMENT, LLC
CIK 1546172
Shares
595.93K
Value
8.16M
Filed
Jun 30, 2026
AQR CAPITAL MANAGEMENT LLC
CIK 1167557
Shares
594.20K
Value
8.14M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
581.01K
Value
7.96M
Filed
Jun 30, 2026
FIRST WILSHIRE SECURITIES MANAGEMENT INC
CIK 732847
Shares
517.12K
Value
7.08M
Filed
Jun 30, 2026
PORTOLAN CAPITAL MANAGEMENT, LLC
CIK 1350290
Shares
509.06K
Value
5.87M
Filed
Sep 30, 2024
JPMORGAN CHASE & CO
CIK 19617
Shares
460.47K
Value
6.31M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK FINANCE, INC. | 1364742 | 3.35M | 33.28M | Jun 30, 2024 |
| 2 | BLACKROCK, INC. | 2012383 | 2.14M | 29.31M | Jun 30, 2026 |
| 3 | VANGUARD GROUP INC | 102909 | 1.53M | 17.86M | Dec 31, 2025 |
| 4 | NEEDHAM INVESTMENT MANAGEMENT LLC | 1167212 | 1.44M | 19.66M | Jun 30, 2026 |
| 5 | AMERICAN CENTURY COMPANIES INC | 748054 | 1.21M | 16.53M | Jun 30, 2026 |
| 6 | GENDELL JEFFREY L | 1056581 | 1.19M | 16.34M | Jun 30, 2026 |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.19M | 16.28M | Jun 30, 2026 |
| 8 | ACK ASSET MANAGEMENT LLC | 1510940 | 1.09M | 14.69M | Jun 30, 2025 |
| 9 | FIRST EAGLE INVESTMENT MANAGEMENT, LLC | 1325447 | 990.22K | 13.57M | Jun 30, 2026 |
| 10 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 871.50K | 11.93K | Jun 30, 2026 |
| 11 | HARVEY PARTNERS, LLC | 1406484 | 815.02K | 11.17M | Jun 30, 2026 |
| 12 | TWO SIGMA INVESTMENTS, LP | 1179392 | 748.12K | 10.25M | Jun 30, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 721.32K | 9.89M | Jun 30, 2026 |
| 14 | DIMENSIONAL FUND ADVISORS LP | 354204 | 665.27K | 9.11M | Jun 30, 2026 |
| 15 | WESTERLY CAPITAL MANAGEMENT, LLC | 1546172 | 595.93K | 8.16M | Jun 30, 2026 |
| 16 | AQR CAPITAL MANAGEMENT LLC | 1167557 | 594.20K | 8.14M | Jun 30, 2026 |
| 17 | STATE STREET CORP | 93751 | 581.01K | 7.96M | Jun 30, 2026 |
| 18 | FIRST WILSHIRE SECURITIES MANAGEMENT INC | 732847 | 517.12K | 7.08M | Jun 30, 2026 |
| 19 | PORTOLAN CAPITAL MANAGEMENT, LLC | 1350290 | 509.06K | 5.87M | Sep 30, 2024 |
| 20 | JPMORGAN CHASE & CO | 19617 | 460.47K | 6.31M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.