AMENTUM HOLDINGS INC AMTM
COM · Common Stock · CUSIP 023939101 · ISIN US0239391016
American energy and defense projects contractor
- SectorIndustrials
- IndustryServices-Business Services, NEC
- HeadquartersChantilly, VA
- Founded2020
- Websiteamentum.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($2.1m this quarter). Holder counts are more reliable. Shares outstanding: 243.3m as of 2024-12-06, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $21.05. Options: 16 managers hold calls ($93.5m notional), 11 hold puts ($43.8m).
Trends to Q4 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2024 | 493 |
| Q4 2024 | 452 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2024 | $0 | $0 | — |
| Q2 2024 | $0 | $0 | — |
| Q3 2024 | $12.4m | $2.4m | 0.19 |
| Q4 2024 | $93.5m | $43.8m | 0.47 |
Biggest buyers
| AMERICAN SECURITIES LLC | New | +43.9m |
| BlackRock, Inc. | Added | +7.9m |
| Invesco Ltd. | Added | +6.1m |
| COOPER CREEK PARTNERS MANAGEMENT LLC | Added | +3.3m |
| NorthCoast Asset Management LLC | Added | +3.0m |
| VANGUARD GROUP INC | Added | +2.5m |
| FMR LLC | Added | +2.3m |
| THOMPSON SIEGEL & WALMSLEY LLC | Added | +1.6m |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +1.4m |
| CSM Advisors, LLC | Added | +1.2m |
Biggest sellers
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | Sold out | -3.2m |
| Boston Partners | Sold out | -3.0m |
| MACQUARIE GROUP LTD | Reduced | -1.8m |
| Ninety One UK Ltd | Sold out | -1.5m |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Sold out | -1.2m |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -1.2m |
| Simcoe Capital Management, LLC | Sold out | -1.2m |
| BANK OF AMERICA CORP /DE/ | Reduced | -1.1m |
| DEUTSCHE BANK AG\ | Reduced | -919.8k |
| STATE STREET CORP | Reduced | -873.1k |
Biggest calls
| Castalian Partners, LLC | First filing | $62.7m3.0m shares |
| CITADEL ADVISORS LLC | New | $5.1m242.6k shares |
| NOMURA HOLDINGS INC | New | $4.3m205.7k shares |
| Caption Management, LLC | New | $4.2m200.0k shares |
| Arvin Capital Management LP | New | $4.2m200.0k shares |
| JANE STREET GROUP, LLC | New | $3.5m164.5k shares |
| SIMPLEX TRADING, LLC | New | $2.4m112.7k shares |
| Hiddenite Capital Partners LP | New | $2.1m100.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $1.4m67.9k shares |
| GROUP ONE TRADING LLC | New | $1.1m50.6k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $14.6m693.9k shares |
| CITADEL ADVISORS LLC | New | $8.5m405.2k shares |
| SIMPLEX TRADING, LLC | New | $7.8m368.7k shares |
| Caption Management, LLC | New | $4.2m200.0k shares |
| GROUP ONE TRADING LLC | New | $3.4m161.7k shares |
| JANE STREET GROUP, LLC | New | $3.0m141.2k shares |
| WOLVERINE TRADING, LLC | New | $1.6m70.0k shares |
| Walleye Trading LLC | Reduced | $403.8k19.2k shares |
| GOLDMAN SACHS GROUP INC | Reduced | $239.7k11.4k shares |
| Walleye Capital LLC | Reduced | $164.0k7.8k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
ASP Manager Corp.
13D · may seek influence
new · filed 2024-12-23
Stated purposeThe information set forth or incorporated by reference in Items 3, 5 and 6 is hereby incorporated by reference in this Item 4. Director Nominees Benjamin Dickson, a managing director of American Securities LLC, and Connor Wentzell, a principal of American Securities LLC, are nominees of the Sponsor Stockholders (as defined below) to the Issuer's board of directors (the "Board") pursuant to the Stockholders Agreement (as defined below). Alan Goldberg, the co-founder and chief executive officer of Goldberg Lindsay & Co. LLC, an affiliate of LG (as defined below), and Russell Triedman, a managing partner of Goldberg Lindsay & Co. LLC, are also nominees of the Sponsor Stockholders on the Board pursuant to the Stockholders Agreement. General The Reporting Persons acquired the secur… Full filing |
18.0% |
GOLDBERG ALAN E
13D · may seek influence
new · filed 2024-12-23
Stated purposeThe information set forth or incorporated by reference in Items 3, 5 and 6 is hereby incorporated by reference in this Item 4. Director Nominees Mr. Goldberg, the co-founder and chief executive officer of Goldberg Lindsay & Co. LLC, an affiliate of the Reporting Persons, and Russell Triedman, a managing partner of Goldberg Lindsay & Co. LLC, are nominees of the Sponsor Stockholders (as defined below) to the Issuer's board of directors (the "Board") pursuant to the Stockholders Agreement (as defined below). Benjamin Dickson, a managing director of American Securities LLC, an affiliate of AS (as defined below), and Connor Wentzell, a principal of American Securities LLC, are also nominees of the Sponsor Stockholders on the Board pursuant to the Stockholders Agreement. General The Report… Full filing |
18.0% |
| Invesco Ltd. 13G · institution +1.0 pts · filed 2026-05-07 | 10.1% |
| BlackRock, Inc. 13G · institution filed 2025-02-05 | 6.9% |
| PRIMECAP MANAGEMENT CO/CA/ 13G · institution new · filed 2026-08-06 | 5.0% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26)
Insider purchases and sales in Q4 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported in Q4 2024.
Holders, Q4 2024
| Manager | Shares | Change |
|---|---|---|
| AMERICAN SECURITIES LLC 100.00% of their portfolio | 43.9m $923.1m | New |
| BlackRock, Inc. 0.01% of their portfolio | 16.8m $352.8m | Added +7.9m |
| VANGUARD GROUP INC 0.01% of their portfolio | 16.5m $347.9m | Added +2.5m |
| Invesco Ltd. 0.05% of their portfolio | 13.9m $291.4m | Added +6.1m |
| STATE STREET CORP 0.01% of their portfolio | 6.5m $135.7m | Reduced -873.1k |
| PRIMECAP MANAGEMENT CO/CA/ 0.10% of their portfolio | 6.4m $134.9m | Added +1.1m |
| COOPER CREEK PARTNERS MANAGEMENT LLC 2.70% of their portfolio | 4.2m $87.4m | Added +3.3m |
| NorthCoast Asset Management LLC 0.33% of their portfolio | 3.2m $66.3m | Added +3.0m |
| Ruane, Cunniff & Goldfarb L.P. 0.87% of their portfolio | 2.4m $51.2m | Reduced -94.2k |
| Allspring Global Investments Holdings, LLC 0.08% of their portfolio | 2.4m $52.4m | Reduced -10.0k |
| FMR LLC 0.00% of their portfolio | 2.4m $50.4m | Added +2.3m |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 2.3m $49.1m | Added +1.4m |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 2.0m $41.3m | Reduced -1.2m |
| THOMPSON SIEGEL & WALMSLEY LLC 0.64% of their portfolio | 1.9m $41.0m | Added +1.6m |
| FIL Ltd 0.04% of their portfolio | 1.8m $37.7m | Added +1.1m |
| Thrivent Financial for Lutherans 0.07% of their portfolio | 1.6m $33.9m | Added +1.1m |
| MORGAN STANLEY 0.00% of their portfolio | 1.5m $31.2m | Added +455.6k |
| NORGES BANK 0.00% of their portfolio | 1.4m $30.3m | Not comparable |
| CSM Advisors, LLC 0.74% of their portfolio | 1.3m $26.9m | Added +1.2m |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 1.3m $26.6m | Added +503.7k |
| MILLENNIUM MANAGEMENT LLC 0.02% of their portfolio | 1.2m $25.2m | Added +524.8k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 1.2m $24.3m | Reduced -105.2k |
| VAN ECK ASSOCIATES CORP 0.03% of their portfolio | 1.1m $23.8m | New |
| UBS Group AG 0.01% of their portfolio | 1.1m $23.8m | Added +705.2k |
| Castalian Partners, LLC 19.87% of their portfolio | 1.0m $21.0m | First filing |
| Arvin Capital Management LP 8.15% of their portfolio | 965.2k $20.3m | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.03% of their portfolio | 876.4k $18.4m | Added +827.4k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.04% of their portfolio | 869.6k $18.3m | Added +37.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 842.2k $17.7m | Added +693.7k |
| CACTI ASSET MANAGEMENT LLC 1.38% of their portfolio | 824.5k $18.4m | New |
| Kopernik Global Investors, LLC 1.72% of their portfolio | 766.0k $16.1m | New |
| Legal & General Group Plc 0.00% of their portfolio | 678.1k $14.3m | Added +18.4k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 651.3k $13.7m | Reduced -123.7k |
| CI INVESTMENTS INC. 0.05% of their portfolio | 643.1k $13.5m | Reduced -330.7k |
| Engine Capital Management, LP 2.39% of their portfolio | 621.4k $13.1m | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 618.9k $13.0m | Added +285.6k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 608.8k $12.8m | Reduced -1.1m |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 602.0k $12.7m | Added +456.5k |
| MOORE CAPITAL MANAGEMENT, LP 0.23% of their portfolio | 592.2k $12.5m | New |
| Aristotle Capital Boston, LLC 0.37% of their portfolio | 477.0k $10.0m | Added +431.3k |
| DISCOVERY CAPITAL MANAGEMENT, LLC / CT 0.67% of their portfolio | 465.3k $9.8m | New |
| Voss Capital, LP 0.70% of their portfolio | 449.8k $9.5m | New |
| Penn Capital Management Company, LLC 0.92% of their portfolio | 446.3k $9.4m | New |
| 683 Capital Management, LLC 0.88% of their portfolio | 425.0k $8.9m | New |
| VOYA INVESTMENT MANAGEMENT LLC 0.01% of their portfolio | 404.1k $8.5m | New |
| Focus Partners Wealth 0.01% of their portfolio | 402.7k $8.5m | Added +127.5k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 394.8k $8.3m | Reduced -86.2k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 379.0k $8.0m | Added +300.4k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 359.2k $7.6m | Reduced -53.8k |
| Arosa Capital Management LP 4.84% of their portfolio | 350.0k $7.4m | New |
| CITIGROUP INC 0.01% of their portfolio | 327.8k $6.9m | Added +212.9k |
| Verition Fund Management LLC 0.03% of their portfolio | 320.9k $6.7m | New |
| Public Sector Pension Investment Board 0.03% of their portfolio | 309.2k $6.5m | New |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 303.9k $6.4m | Reduced -132.6k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 295.2k $6.2m | Added +73.3k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 287.3k $6.0m | Added +43.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 273.7k $5.8m | Reduced -400.4k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 272.2k $5.7m | Reduced -510.6k |
| Telos Capital Management, Inc. 0.60% of their portfolio | 267.0k $5.6m | Added +178.7k |
| Swiss National Bank 0.00% of their portfolio | 263.2k $5.5m | Reduced -49.6k |
| SIMPLEX TRADING, LLC 0.13% of their portfolio | 220.0k $4.6m | New |
| California Public Employees Retirement System 0.00% of their portfolio | 197.5k $4.2m | Reduced -58.7k |
| AVENIR CORP 0.42% of their portfolio | 193.5k $4.1m | New |
| Mesirow Financial Investment Management, Inc. 0.07% of their portfolio | 176.9k $3.7m | Reduced -9.1k |
| BARCLAYS PLC 0.00% of their portfolio | 169.7k $3.6m | Added +9.8k |
| HUTCHINSON CAPITAL MANAGEMENT/CA 0.58% of their portfolio | 145.5k $3.1m | Reduced -3.1k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.01% of their portfolio | 145.5k $3.1m | Added +63.1k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 131.4k $2.8m | Reduced -85.2k |
| Point72 Asset Management, L.P. 0.01% of their portfolio | 126.4k $2.7m | Added +120.4k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 125.5k $2.6m | Added +48.1k |
| Pacific Capital Partners Ltd 1.55% of their portfolio | 125.0k $2.6m | New |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 124.1k $2.6m | Added +8.0k |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 122.6k $2.6m | Added +43.8k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 119.9k $2.5m | Added +33.5k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 119.5k $2.5m | Reduced -56.3k |
| LPL Financial LLC 0.00% of their portfolio | 118.8k $2.5m | Added +14.6k |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio | 114.7k $2.4m | Reduced -6.3k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio | 114.6k $2.4m | Reduced -17.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 113.7k $2.4m | Reduced -428.3k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 112.2k $2.4m | Reduced -205.9k |
| Caption Management, LLC 0.10% of their portfolio | 109.9k $2.3m | New |
| Centiva Capital, LP 0.08% of their portfolio | 104.1k $2.2m | New |
| UNITED CAPITAL FINANCIAL ADVISORS, LLC 0.02% of their portfolio | 102.3k $2.2m | Reduced -28.2k |
| State of New Jersey Common Pension Fund D 0.01% of their portfolio | 95.7k $2.0m | Added +52.3k |
| TOWER BRIDGE ADVISORS 0.21% of their portfolio | 93.7k $2.0m | Reduced -31.9k |
| Crestwood Advisors Group, LLC 0.04% of their portfolio | 93.5k $2.0m | Added +13.5k |
| Cinctive Capital Management LP 0.10% of their portfolio | 91.1k $1.9m | New |
| North Growth Management Ltd. 0.36% of their portfolio | 91.0k $1.9m | Reduced -2.0k |
| XTX Topco Ltd 0.16% of their portfolio | 90.1k $1.9m | Added +82.7k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 89.6k $1.9m | Reduced -182.6k |
| Two Point Capital Management, Inc. 0.74% of their portfolio | 88.1k $2.1m | New |
| TEACHER RETIREMENT SYSTEM OF TEXAS 0.01% of their portfolio | 86.7k $1.8m | New |
| GROUP ONE TRADING LLC 0.06% of their portfolio | 86.0k $1.8m | Added +85.0k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 85.6k $1.8m | First filing |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 84.4k $1.8m | Reduced -555.0k |
| LATHROP INVESTMENT MANAGEMENT CO 0.34% of their portfolio | 84.0k $1.8m | Reduced -43.1k |
| NEVILLE RODIE & SHAW INC 0.12% of their portfolio | 81.0k $1.7m | Reduced -9.0k |
| Washington Trust Advisors, Inc. 0.14% of their portfolio | 80.2k $1.7m | Reduced -48.0k |
| HAHN CAPITAL MANAGEMENT LLC 0.71% of their portfolio | 77.3k $1.6m | Added +25.0k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio | 74.6k $1.6m | Reduced -35.6k |