Institutional Ownership
Amentum Holdings Inc
CUSIP 023939101COMAMTMQ1 2026
13D / 13G Filings
15
Schedule 13D/13G on record
Beneficial Filers
9
Distinct reporting persons
Largest Stake
37.0%
Max % of class reported
Institutional Holders
477
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
15 filings · latest Nov 6, 2025
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Nov 6, 2025 | Invesco Ltd. | 13G/A | 9.1% | 22.12M | SEC |
| 2 | May 9, 2025 | Invesco Ltd. | 13G/A | 7.1% | 17.19M | SEC |
| 3 | Mar 13, 2025 | Jacobs Solutions Inc. | 13G/A | — | — | SEC |
| 4 | Feb 7, 2025 | Invesco Ltd. | 13G | 5.7% | 13.86M | SEC |
| 5 | Feb 5, 2025 | Blackrock, Inc. | 13G/A | 6.9% | 16.77M | SEC |
| 6 | Jan 30, 2025 | The Vanguard Group | 13G/A | 6.8% | 16.54M | SEC |
| 7 | Dec 23, 2024 | Alan E. Goldberg | 13D | 18.0% | — | SEC |
| 8 | Dec 23, 2024 | Asp Amentum Investco LP | 13D | 18.0% | — | SEC |
| 9 | Dec 19, 2024 | Amentum Joint Venture LP | 13D/A | — | — | SEC |
| 10 | Nov 12, 2024 | Blackrock, Inc. | 13G | 5.8% | 8.92M | SEC |
5 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Amentum Holdings Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | American Securities LLC | 45.03M | $1.17B |
| 2 | Invesco Ltd. | 21.47M | $560.04M |
| 3 | Blackrock, Inc. | 17.84M | $465.30M |
| 4 | Primecap Management Co/Ca/ | 12.09M | $315.18M |
| 5 | Fmr LLC | 5.58M | $145.48M |
| 6 | State Street Corp | 5.08M | $132.46M |
| 7 | Frontier Capital Management Co LLC | 4.93M | $128.58M |
| 8 | Dimensional Fund Advisors LP | 3.79M | $98.77M |
| 9 | Geode Capital Management, LLC | 2.81M | $73.42M |
| 10 | Mirae Asset Global Etfs Holdings Ltd. | 2.79M | $72.64M |