CHANTILLY, VA
AMENTUM HOLDINGS, INC.AMTM— Latest position per institution from SEC 13F filings
15
Institutional holders
183.12M
Total shares held
3.82B
Estimated value
9.16M
Avg. position size
AMERICAN SECURITIES LLC
CIK 1475483
Shares
45.03M
Value
930.70M
Filed
Jun 30, 2026
INVESCO LTD.
CIK 914208
Shares
24.95M
Value
515.80M
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
17.91M
Value
370.14M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
15.41M
Value
446.94M
Filed
Dec 31, 2025
PRIMECAP MANAGEMENT CO/CA/
CIK 763212
Shares
12.29M
Value
253.94M
Filed
Jun 30, 2026
LEGACY ADVISORS, LLC
CIK 1720969
Shares
9.07M
Value
9.07M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
7.95M
Value
164.29M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
6.71M
Value
138.74M
Filed
Jun 30, 2026
FMR LLC
CIK 315066
Shares
5.68M
Value
117.39M
Filed
Jun 30, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
5.54M
Value
114.46M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
5.15M
Value
106.49M
Filed
Jun 30, 2026
FRONTIER CAPITAL MANAGEMENT CO LLC
CIK 351173
Shares
4.14M
Value
85.66M
Filed
Jun 30, 2026
TROLUCE CAPITAL ADVISORS LLC
CIK 1910321
Shares
3.57M
Value
73.70M
Filed
Jun 30, 2026
BARROW HANLEY MEWHINNEY & STRAUSS LLC
CIK 313028
Shares
3.23M
Value
104.04M
Filed
Sep 30, 2024
NORTHCOAST ASSET MANAGEMENT LLC
CIK 1665198
Shares
3.01M
Value
72.04M
Filed
Sep 30, 2025
BOSTON PARTNERS
CIK 1386060
Shares
2.98M
Value
95.77M
Filed
Sep 30, 2024
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
2.72M
Value
56.17M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
2.71M
Value
56.05M
Filed
Jun 30, 2026
MORGAN STANLEY
CIK 895421
Shares
2.66M
Value
55.03M
Filed
Jun 30, 2026
ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC
CIK 1890906
Shares
2.42M
Value
52.43M
Filed
Dec 31, 2024
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | AMERICAN SECURITIES LLC | 1475483 | 45.03M | 930.70M | Jun 30, 2026 |
| 2 | INVESCO LTD. | 914208 | 24.95M | 515.80M | Jun 30, 2026 |
| 3 | BLACKROCK, INC. | 2012383 | 17.91M | 370.14M | Jun 30, 2026 |
| 4 | VANGUARD GROUP INC | 102909 | 15.41M | 446.94M | Dec 31, 2025 |
| 5 | PRIMECAP MANAGEMENT CO/CA/ | 763212 | 12.29M | 253.94M | Jun 30, 2026 |
| 6 | LEGACY ADVISORS, LLC | 1720969 | 9.07M | 9.07M | Jun 30, 2026 |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 7.95M | 164.29M | Jun 30, 2026 |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 6.71M | 138.74M | Jun 30, 2026 |
| 9 | FMR LLC | 315066 | 5.68M | 117.39M | Jun 30, 2026 |
| 10 | DIMENSIONAL FUND ADVISORS LP | 354204 | 5.54M | 114.46M | Jun 30, 2026 |
| 11 | STATE STREET CORP | 93751 | 5.15M | 106.49M | Jun 30, 2026 |
| 12 | FRONTIER CAPITAL MANAGEMENT CO LLC | 351173 | 4.14M | 85.66M | Jun 30, 2026 |
| 13 | TROLUCE CAPITAL ADVISORS LLC | 1910321 | 3.57M | 73.70M | Jun 30, 2026 |
| 14 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | 313028 | 3.23M | 104.04M | Sep 30, 2024 |
| 15 | NORTHCOAST ASSET MANAGEMENT LLC | 1665198 | 3.01M | 72.04M | Sep 30, 2025 |
| 16 | BOSTON PARTNERS | 1386060 | 2.98M | 95.77M | Sep 30, 2024 |
| 17 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 2.72M | 56.17M | Jun 30, 2026 |
| 18 | GOLDMAN SACHS GROUP INC | 886982 | 2.71M | 56.05M | Jun 30, 2026 |
| 19 | MORGAN STANLEY | 895421 | 2.66M | 55.03M | Jun 30, 2026 |
| 20 | ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC | 1890906 | 2.42M | 52.43M | Dec 31, 2024 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.