Amentum Ownership | Who Owns Amentum?
Amentum Ownership Summary
Amentum is owned by 81.73% institutional investors, 44.52% insiders. American securities is the largest institutional shareholder, holding 18.53% of AMTM shares.
AMTM Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Amentum | 81.73% | 44.52% | -26.25% |
| Sector | Industrials Stocks | 64.07% | 12.69% | 23.24% |
| Industry | Defense Stocks | 62.16% | 10.39% | 27.46% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| American securities | 45.03M | 18.53% | $1.06T |
| Blackrock funding, inc. /de | 19.00M | 7.82% | $448.47M |
| Primecap management co/ca/ | 12.03M | 4.95% | $284.04M |
| Frontier capital management | 5.46M | 2.25% | $128.93M |
| Van eck associates | 3.07M | 1.26% | $72.44M |
| Kovitz investment group partners | 3.00M | 1.23% | $70.85M |
| Ruane, cunniff & goldfarb | 2.44M | 1.00% | $57.65M |
| Discovery capital management, llc / ct | 2.30M | 0.95% | $54.28M |
| Arvin capital management lp | 2.14M | 0.88% | $50.51M |
| Fil | 2.07M | 0.85% | $48.81M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| American securities | 45.03M | 100.00% | $1.06T |
| Arvin capital management lp | 2.14M | 10.34% | $50.51M |
| Brightline capital management | 1.00M | 10.17% | $23.61M |
| Awh capital | 165.25K | 4.55% | $3.90M |
| Discovery capital management, llc / ct | 2.30M | 4.24% | $54.28M |
| 683 capital management | 1.63M | 2.53% | $38.48M |
| Voss capital | 1.40M | 2.28% | $33.05M |
| Avenir | 895.35K | 2.17% | $21.14M |
| Penn capital management company | 1.00M | 2.05% | $23.76M |
| Kopernik global investors | 636.23K | 1.65% | $15.02M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Primecap management co/ca/ | 12.03M | 0.23% | 1.97M |
| Frontier capital management | 5.46M | 1.19% | 1.88M |
| American securities | 45.03M | 100.00% | 1.13M |
| Brightline capital management | 1.00M | 10.17% | 1.00M |
| Freestone grove partners lp | 2.05M | 0.37% | 887.02K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Allspring global investments | - | - | -2.42M |
| Wellington management group llp | - | - | -2.33M |
| Balyasny asset management | - | - | -1.88M |
| Cooper creek partners management | - | - | -1.22M |
| Mirae asset global etfs | - | - | -869.60K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Brightline capital management | 1.00M | 10.17% | 1.00M | $23.61M |
| Soviero asset management, lp | 110.00K | 1.57% | 110.00K | $2.60M |
| Gamco investors, inc. et al | 108.67K | 0.03% | 108.67K | $2.57M |
| Coastal bridge advisors | 60.41K | 0.12% | 60.41K | $1.43M |
| Oak thistle | 28.23K | 0.10% | 28.23K | $666.51K |
Sold Out
| Holder | Change |
|---|---|
| Tfc financial management | -1.00 |
| First horizon advisors | -2.00 |
| Dinuzzo private wealth | -2.00 |
| St germain d j | -6.00 |
| Sjs investment consulting | -6.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2025 | 465 | 7.64% | 198,595,810 | 6.58% | 81 | 1.39% | 337 | 79.26% | 99 | -31.25% |
| Mar 31, 2025 | 431 | -5.48% | 189,528,097 | 11.36% | 77 | 1.59% | 189 | -17.11% | 143 | -10.06% |
| Dec 31, 2024 | 460 | -6.12% | 176,772,092 | 77.69% | 72 | 4.35% | 231 | -52.27% | 160 | - |
| Sep 30, 2024 | 490 | - | 99,482,357 | - | 40 | - | 484 | - | - | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Feb 18, 2025 | Loughran Barbara | - | Buy | $97.64K |
| Feb 12, 2025 | DEMETRIOU STEVEN J. | Executive Chair | Buy | $2.08M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | - | - |
| 2025 Q1 | 2 | - |
| 2024 Q4 | - | - |
| 2024 Q3 | - | - |
AMTM Ownership FAQ
Try Tickergate Pro Free
Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)
Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis
Discover trending investment themes
Find your next best investment
Research stocks using tools