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Amentum Holdings, Inc.

AMTM
Exchange
NYSE
Industry
Services-Business Services, NEC
SEC CIK
0002011286

No open-market purchases or sales by Amentum Holdings, Inc. insiders were filed in the last 90 days; 464 institutions reported holding it in 13F filings for Q2 2026, worth $4.34B in total; Soros Fund Management is the only superinvestor holding it.

Q4 2024 vs. Q3 2024

How the institutions holding Amentum Holdings, Inc. changed between Q3 2024 and Q4 2024.

All holders in Q4 2024All holders in Q3 2024

13F holders of AMTM: Q3 2024 compared with Q4 2024
MeasureQ3 2024Of which not filed for Q4 2024Q4 2024Change
Holders4923451−38
Shares100.6M9.57K165.3M+64.8M (+64.4%)
Value$3.23B$308.7K$3.48B+$250.9M (+7.8%)

3 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so the changes leave them out.

New holders (145)

Institutions that held Amentum Holdings, Inc. at the end of Q4 2024 but not at the end of Q3 2024.

Showing the largest 100 of 145 by value.

Institutions new to AMTM in Q4 2024
InstitutionSharesValue% of portfolio
American Securities LLC43,893,904$923.1M100.00%
Norges Bank1,440,127$30.3M0.00%
Van Eck Associates Corp1,132,285$23.8M0.03%
Castalian Partners, LLC1,000,000$21.0M19.87%
Arvin Capital Management LP965,197$20.3M8.15%
Cacti Asset Management LLC824,464$18.4M1.42%
Kopernik Global Investors, LLC765,982$16.1M1.72%
Engine Capital Management, LP621,400$13.1M2.39%
Moore Capital Management, LP592,190$12.5M0.23%
Discovery Capital Management, LLC465,300$9.79M0.67%
Voss Capital, LLC449,818$9.46M0.70%
Penn Capital Management Co Inc446,308$9.39M0.92%
683 Capital Management, LLC425,000$8.94M0.88%
Voya Investment Management LLC404,115$8.50M0.01%
Arosa Capital Management LP350,000$7.36M4.84%
Verition Fund Management LLC320,916$6.75M0.03%
Public Sector Pension Investment Board309,186$6.50M0.03%
Simplex Trading, LLC219,981$4.63M0.13%
Avenir Corp193,470$4.07M0.42%
Pacific Capital Partners Ltd125,000$2.63M1.55%
Caption Management, LLC109,851$2.31M0.10%
Centiva Capital, LP104,140$2.19M0.08%
Two Point Capital Management, Inc.88,129$2.08M0.74%
Cinctive Capital Management LP91,085$1.92M0.10%
Teacher Retirement System of Texas86,692$1.82M0.01%
Raymond James Financial Inc85,562$1.80M0.00%
Wolverine Trading, LLC71,103$1.59M0.04%
Arrowstreet Capital, Limited Partnership71,946$1.51M0.00%
CenterBook Partners LP71,306$1.50M0.09%
Winton Group Ltd64,748$1.36M0.09%
Bank of Montreal59,741$1.26M0.00%
Algert Global LLC56,842$1.20M0.03%
Comerica Bank48,787$1.03M0.00%
Rangeley Capital, LLC47,000$988.4K0.95%
Public Employees Retirement System of Ohio44,606$938.1K0.00%
Standard Life Aberdeen plc35,555$792.9K0.00%
Jones Financial Companies LLLP37,009$778.3K0.00%
Country Club Bank32,594$726.8K0.05%
Walleye Trading LLC32,772$689.2K0.01%
Universal- Beteiligungs- und Servicegesellschaft mbH32,165$676.4K0.00%
Weiss Asset Management LP30,031$631.6K0.01%
Murchinson Ltd.30,000$630.9K0.28%
Alpine Global Management, LLC25,000$525.8K0.15%
Baker Avenue Asset Management, LP24,740$520.3K0.02%
Security National Bank of So Dak23,299$490.0K0.27%
Hyperion Capital Advisors LP19,563$411.4K0.21%
Foundations Investment Advisors, LLC19,458$409.2K0.01%
Phoenix Holdings Ltd.18,932$398.1K0.01%
Police & Firemen's Retirement System of New Jersey18,866$396.8K0.00%
Mutual of America Capital Management LLC18,796$395.3K0.00%
Keeley-Teton Advisors, LLC17,757$373.4K0.04%
First Manhattan Co17,602$370.2K0.00%
Mercer Global Advisors Inc16,207$340.8K0.00%
National Pension Service15,555$327.1K0.00%
Kennedy Capital Management, Inc.15,449$324.9K0.01%
Security National Bank of Sioux City Iowa15,269$321.1K0.22%
Nomura Holdings Inc14,563$306.3K0.00%
Shufro Rose & Co LLC13,644$286.9K0.02%
Cannon Global Investment Management, LLC13,500$283.9K0.70%
Amundi12,908$277.4K0.00%
Public Employees Retirement Association of Colorado12,768$269.0K0.00%
DRW Securities, LLC12,311$258.9K0.02%
Pathstone Holdings, LLC12,128$255.1K0.00%
Jefferies Financial Group Inc.11,830$248.8K0.00%
Boothbay Fund Management, LLC11,250$236.6K0.01%
First Bank & Trust10,372$218.1K0.04%
Janney Capital Management LLC10,039$211.0K0.01%
Pekin Hardy Strauss, Inc.9,900$208.2K0.03%
Fifth Lane Capital, LP9,775$205.6K0.60%
JustInvest LLC9,651$203.0K0.00%
Washington Trust Co9,128$192.0K0.01%
Umb Bank N A8,096$170.3K0.00%
Smithfield Trust Co7,476$155.0K0.01%
Y.D. More Investments Ltd6,790$142.7K0.01%
American National Bank6,488$136.4K0.02%
MAI Capital Management4,601$96.8K0.00%
Whittier Trust Co4,518$95.0K0.00%
Bank of Jackson Hole Trust3,765$79.2K0.05%
Caldwell Trust Co3,478$73.1K0.01%
Northwestern Mutual Wealth Management Co3,465$72.9K0.00%
NBT Bank N A3,001$63.1K0.00%
Hilltop National Bank2,554$53.7K0.02%
Farther Finance Advisors, LLC2,472$52.0K0.00%
Horizon Investments, LLC1,712$36.0K0.00%
Asset Planning,Inc1,690$35.5K0.03%
Huntington National Bank1,438$30.2K0.00%
Spire Wealth Management1,039$21.9K0.00%
Whittier Trust Co of Nevada Inc1,023$21.5K0.00%
Mechanics Financial Corp972$20.4K0.01%
R Squared Ltd900$18.9K0.02%
Crews Bank & Trust852$17.9K0.00%
Menard Financial Group LLC798$16.8K0.01%
Quent Capital, LLC789$16.6K0.00%
First Command Advisory Services, Inc.656$13.8K0.00%
Private Trust Co NA628$13.2K0.00%
TD Waterhouse Canada Inc.603$12.7K0.00%
Natixis578$12.2K0.00%
FNY Investment Advisers, LLC500$10.0K0.01%
Global Wealth Strategies & Associates465$9.78K0.00%
BankPlus Trust Department464$9.76K0.00%

Sold out (183)

Institutions that held Amentum Holdings, Inc. at the end of Q3 2024 and filed for Q4 2024 without it.

Showing the largest 100 of 183 by value.

Institutions that sold out of AMTM in Q4 2024
InstitutionShares, Q3 2024Value, Q3 2024
Barrow Hanley Mewhinney & Strauss LLC3,225,967$104.0M
Boston Partners2,983,146$95.8M
Ninety One UK Ltd1,538,931$49.6M
Massachusetts Financial Services Co1,228,298$39.6M
Simcoe Capital Management, LLC1,153,105$37.2M
Caisse de Depot Et Placement du Quebec718,039$23.2M
First Trust Advisors LP514,562$16.6M
Agf Management Ltd365,376$11.8M
Sessa Capital IM, L.P.354,699$11.4M
Madison Avenue Partners, LP383,218$11.1M
Two Sigma Investments, LP321,096$10.4M
Todd Asset Management LLC307,663$9.92M
American Century Companies Inc287,886$9.28M
Waters Parkerson & Co., LLC203,578$6.57M
Korea Investment CORP197,972$6.38M
Campbell Newman Asset Management Inc193,208$6.23M
Two Sigma Advisers, LP184,900$5.96M
Fort Baker Capital Management LP167,490$5.40M
Lazard Asset Management LLC204,047$5.24M
Adage Capital Partners GP, L.L.C.118,027$3.81M
La Banque Postale Asset Management SA115,535$3.73M
F/M Investments LLC109,887$3.54M
Mackenzie Financial Corp104,687$3.38M
Wedge Capital Management L L P83,542$2.69M
Panagora Asset Management Inc81,538$2.63M
Manufacturers Life Insurance Company, The79,030$2.55M
Asset Management One Co.,Ltd.76,777$2.48M
ZWJ Investment Counsel Inc69,967$2.26M
Balyasny Asset Management LLC69,249$2.23M
Janney Montgomery Scott LLC67,549$2.18M
Chevy Chase Trust Holdings, Inc.67,201$2.17M
Wharton Business Group, LLC65,295$2.11M
Greenwood Gearhart Inc60,733$1.96M
Carmel Capital Management L.L.C.58,833$1.90M
Cubist Systematic Strategies, LLC58,116$1.87M
Royal London Asset Management Ltd55,672$1.80M
Bancreek Capital Management, LP55,288$1.78M
McKinley Carter Wealth Services, Inc.54,707$1.76M
Bridgewater Associates, LP48,532$1.57M
Robeco Institutional Asset Management B.V.41,443$1.34M
Scopus Asset Management, L.P.37,282$1.20M
AXA S.A.36,585$1.18M
Qube Research & Technologies Ltd35,958$1.16M
Daiwa Securities Group Inc.35,390$1.14M
Malaga Cove Capital, LLC35,006$1.13M
State of Michigan Retirement System34,099$1.10M
Resona Asset Management Co.,Ltd.33,376$1.08M
Oppenheimer Asset Management Inc.32,927$1.06M
Louisbourg Investments Inc.38,368$1.02M
Mitsubishi UFJ Trust & Banking Corp31,324$1.01M
Intech Investment Management LLC31,245$1.01M
United Asset Strategies, Inc.28,770$927.8K
Retirement Systems of Alabama27,324$881.2K
Soros Fund Management LLCSuperinvestorSoros Fund Management27,001$870.8K
Czech National Bank25,507$822.6K
Compass Wealth Management LLC24,937$804.2K
Running Oak Capital LLC23,805$767.7K
IFM Investors Pty Ltd22,603$728.9K
Occidental Asset Management, LLC22,426$723.2K
Brevan Howard Capital Management LP21,049$678.8K
Ninety One SA (PTY) Ltd19,965$643.9K
Tredje AP-fonden19,626$632.9K
Cushing Asset Management, LP19,000$612.8K
Stonegate Investment Group, LLC18,844$607.7K
Twin Capital Management Inc17,608$567.9K
Greenwood Capital Associates LLC17,360$559.9K
Legato Capital Management LLC16,923$545.8K
New York Life Investment Management LLC16,663$537.4K
Ionic Capital Management LLC16,622$536.1K
Xponance, Inc.16,454$530.6K
Westover Capital Advisors, LLC15,712$506.7K
Bank of Nova Scotia15,667$505.3K
Garrett Investment Advisors LLC15,646$504.6K
STRS Ohio15,634$504.2K
TCW Group Inc15,569$502.1K
ING Groep NV16,746$495.0K
Savant Capital, LLC15,278$492.7K
Nissay Asset Management Corp15,092$486.7K
Atria Investments LLC14,821$478.0K
Envestnet Portfolio Solutions, Inc.14,491$467.3K
Man Group plc14,475$466.8K
Nebula Research & Development LLC14,246$459.4K
Swiss Life Asset Management Ltd16,362$452.6K
MML Investors Services, LLC13,923$449.0K
Private Advisor Group, LLC13,435$433.3K
Diametric Capital, LP13,352$430.6K
Signature Estate & Investment Advisors LLC13,055$421.0K
Sumitomo Mitsui DS Asset Management Company, Ltd12,850$414.4K
Cresset Asset Management, LLC11,700$377.3K
KCM Investment Advisors LLC11,441$369.0K
Brinker Capital Investments, LLC10,922$352.2K
Orion Portfolio Solutions, LLC10,922$352.2K
Aberdeen Wealth Management LLC10,582$341.3K
Rafferty Asset Management, LLC10,498$338.6K
Keebeck Wealth Management, LLC10,297$332.1K
CBOE Vest Financial, LLC10,115$326.2K
Magnetar Financial LLC10,073$324.9K
Needham Investment Management LLC10,000$322.5K
CIBC World Markets Corp9,718$313.4K
Stratos Wealth Partners, LTD.9,591$309.3K

Not filed for Q4 2024 yet (3)

Institutions that held Amentum Holdings, Inc. at the end of Q3 2024 and haven't filed a 13F for Q4 2024. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding AMTM in Q3 2024 that haven't filed for Q4 2024
InstitutionShares, Q3 2024Value, Q3 2024
GYL Financial Synergies, LLC9,029$291.2K
Northwest Investment Counselors, LLC528$17.0K
FinTrust Capital Advisors, LLC14$463