AMENTUM HOLDINGS INC AMTM
$21.24
+5.1% 52w: $20.09 – $37.53
Latest 13F among current holders filed 11 days ago (Jun 24, 2026)
Price — last 12 months
research preview data20.0928.8137.53
Jun 20, 2025 Jul 2, 2026
Institutional holders
485
+2 QoQ
13F value
$5.28B
-6.4% QoQ
Smart-money holders
40
signal tier ≥ 2
New smart buyers
7
Q1 2026
Options barometer
3.1×
$134.1M calls / $43.0M puts
Institutional value by quarter
Number of holders
Who owns AMTM?
Q1 2026 filings| Fund | Type | Shares | Value | % of fund | Change |
|---|---|---|---|---|---|
| AMERICAN SECURITIES LLC ★2 | Fundamental diversified | 45.0M | $1.17B | 29.9% | Held |
| Invesco Ltd. | Index provider | 21.5M | $560.0M | 0.1% | -1.6% |
| BlackRock, Inc. | Index provider | 17.8M | $465.3M | 0.0% | +2.2% |
| PRIMECAP MANAGEMENT CO/CA/ ★2 | Long only active | 12.1M | $315.2M | 0.2% | -0.3% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Diversified mechanical | 7.9M | $204.8M | 0.0% | — |
| VANGUARD CAPITAL MANAGEMENT LLC | Diversified mechanical | 6.7M | $173.5M | 0.0% | — |
| FMR LLC | Long only active | 5.6M | $145.5M | 0.0% | -16.8% |
| STATE STREET CORP | Index provider | 5.1M | $132.5M | 0.0% | +0.3% |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Other | 4.9M | $128.6M | 1.3% | -14.6% |
| DIMENSIONAL FUND ADVISORS LP | Quant stat arb | 3.8M | $98.8M | 0.0% | +106.6% |
| GEODE CAPITAL MANAGEMENT, LLC | Index provider | 2.8M | $73.4M | 0.0% | +5.8% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | Index provider | 2.8M | $72.6M | 0.1% | +42.0% |
| Focus Partners Wealth | Wealth advisor | 2.6M | $67.9M | 0.1% | -6.8% |
| BANK OF AMERICA CORP /DE/ | Bank broker | 2.4M | $62.7M | 0.0% | +107.8% |
| MORGAN STANLEY | Bank broker | 2.2M | $58.3M | 0.0% | +7.7% |
| Thrivent Financial for Lutherans | Diversified mechanical | 2.1M | $54.8M | 0.1% | +1.5% |
| Arvin Capital Management LP ★2 | Fundamental concentrated | 2.1M | $54.0M | 12.6% | +26.6% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Index provider | 2.1M | $53.9M | 0.0% | +5.9% |
| UBS Group AG | Bank broker | 1.7M | $44.6M | 0.0% | +730.1% |
| Point72 Asset Management, L.P. | Multistrat pod | 1.6M | $42.5M | 0.1% | +134.5% |
| Ruane, Cunniff & Goldfarb L.P. ★3 | Value conviction | 1.6M | $42.3M | 0.7% | -32.2% |
| SEGRA CAPITAL MANAGEMENT, LLC ★2 | Fundamental diversified | 1.6M | $42.1M | 32.7% | +166.7% |
| Permian Investment Partners, LP ★3 | Fundamental concentrated | 1.6M | $40.9M | 4.5% | New |
| TORONTO DOMINION BANK | Bank broker | 1.6M | $40.8M | 0.1% | New |
| THOMPSON SIEGEL & WALMSLEY LLC | Other | 1.5M | $39.8M | 0.7% | -20.6% |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC ★2 | Fundamental concentrated | 1.4M | $36.4M | 10.8% | +0.3% |
| Verition Fund Management LLC | Multistrat pod | 1.3M | $33.9M | 0.3% | +50.0% |
| VOYA INVESTMENT MANAGEMENT LLC | Diversified mechanical | 1.2M | $31.3M | 0.0% | +4.5% |
| GOLDMAN SACHS GROUP INC | Bank broker | 1.1M | $29.5M | 0.0% | +75.6% |
| LOOMIS SAYLES & CO L P | Other | 1.1M | $28.2M | 0.0% | -3.4% |
| Troluce Capital Advisors LLC ★2 | Fundamental concentrated | 1.0M | $26.1M | 2.8% | New |
| NORTHERN TRUST CORP | Index provider | 984.1K | $25.7M | 0.0% | +3.3% |
| VANGUARD FIDUCIARY TRUST CO | Diversified mechanical | 947.5K | $24.7M | 0.0% | — |
| COOPER CREEK PARTNERS MANAGEMENT LLC ★2 | Fundamental diversified | 929.3K | $24.2M | 1.2% | -40.2% |
| Bank of New York Mellon Corp | Diversified mechanical | 908.6K | $23.7M | 0.0% | -1.5% |
| TWO SIGMA INVESTMENTS, LP | Quant stat arb | 900.2K | $23.5M | 0.0% | +41.1% |
| CACTI ASSET MANAGEMENT LLC ★2 | Fundamental diversified | 881.7K | $23.0M | 1.4% | Held |
| MOORE CAPITAL MANAGEMENT, LP | Fundamental diversified | 873.6K | $22.8M | 0.9% | +83.8% |
| Nuveen, LLC | Diversified mechanical | 871.8K | $22.7M | 0.0% | +7.1% |
| AVENIR CORP ★2 | Fundamental diversified | 841.1K | $21.9M | 2.7% | -1.2% |
| 683 Capital Management, LLC ★2 | Fundamental diversified | 775.0K | $20.2M | 2.0% | -7.2% |
| PRINCIPAL FINANCIAL GROUP INC | Diversified mechanical | 744.7K | $19.4M | 0.0% | +2.2% |
| Russell Investments Group, Ltd. | Diversified mechanical | 713.8K | $18.6M | 0.0% | +63.3% |
| Ancora Advisors LLC | Diversified mechanical | 703.1K | $18.3M | 0.4% | +74.8% |
| Penn Capital Management Company, LLC | Other | 694.4K | $18.2M | 1.4% | -6.7% |
| FIL Ltd | Other | 652.2K | $17.0M | 0.0% | -54.4% |
| WELLS FARGO & COMPANY/MN | Bank broker | 636.7K | $16.6M | 0.0% | +37.0% |
| MILLENNIUM MANAGEMENT LLC | Multistrat pod | 631.1K | $16.5M | 0.0% | +931.4% |
| Public Sector Pension Investment Board | Pension sovereign | 549.8K | $14.3M | 0.0% | +3.6% |
| ROYCE & ASSOCIATES LP | Other | 549.8K | $14.3M | 0.1% | +11.0% |
Exits are not a bearish signal: our backtest shows stocks specialists exit keep outperforming for 3+ quarters — selling usually means profit-taking, not a forecast.
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