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Amentum (AMTM) Institutional Ownership

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$24.80 -0.18 (-0.71%)
Closing price 09/3/2025 03:59 PM Eastern
Extended Trading
$24.79 -0.01 (-0.05%)
As of 09/3/2025 07:34 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
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Institutional Ownership Changes (13F Filings) for Amentum (NYSE:AMTM)

Current
Institutional Ownership
Percentage
39.93%
Number of
Institutional Buyers
(last 12 months)
352
Total
Institutional Inflows
(last 12 months)
$2.50B
Number of
Institutional Sellers
(last 12 months)
127
Total
Institutional Outflows
(last 12 months)
$422.60M
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AMTM Institutional Buying and Selling by Quarter

Amentum Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/26/2025 Thrivent Financial for Lutherans1,687,105$39.83M0.1%+4.1%0.693%
8/19/2025 Marex Group plc50,000$1.18M0.0%N/A0.021%
8/19/2025 State of Wyoming2,758$65K0.0%N/A0.001%
8/16/2025 Public Sector Pension Investment Board514,172$12.14M0.1%+13.0%0.211%
8/16/2025 Evergreen Capital Management LLC11,196$264K0.0%N/A0.005%
8/15/2025 Tower Research Capital LLC TRC 4,353$103K0.0%+182.1%0.002%
8/15/2025 Security National Bank of Sioux City Iowa IA19,273$455K0.3%+12.9%0.008%
8/15/2025 Security National Bank of SO Dak26,840$634K0.3%+8.1%0.011%
8/15/2025 Corient Private Wealth LLC48,395$1.14M0.0%+11.9%0.020%
8/15/2025 State of Tennessee Department of Treasury62,654$1.48M0.0%-17.1%0.026%
8/15/2025 Captrust Financial Advisors30,815$728K0.0%+49.5%0.013%
8/15/2025 Vident Advisory LLC432,165$10.20M0.1%+47.6%0.178%
8/15/2025 Tidal Investments LLC9,430$223K0.0%N/A0.004%
8/15/2025 Smartleaf Asset Management LLC1,814$43K0.0%+433.5%0.001%
8/15/2025 Riggs Asset Managment Co. Inc.1,931$46K0.0%N/A0.001%
8/15/2025 Ruane Cunniff & Goldfarb L.P.2,441,743$57.65M1.0%+2.0%1.003%
8/15/2025 Moore Capital Management LP611,123$14.43M0.2%+22.7%0.251%
8/15/2025 Hyperion Capital Advisors LP51,487$1.22M0.8%+177.0%0.021%
8/15/2025 Fortress Investment Group LLC38,106$900K0.1%+506.1%0.016%
8/15/2025 Grizzlyrock Capital LLC253,363$5.98M4.1%+54.3%0.104%
8/15/2025 Bank of America Corp DE868,265$20.50M0.0%-10.4%0.357%
8/15/2025 683 Capital Management LLC1,630,000$38.48M2.5%+46.5%0.670%
8/15/2025 Ameriprise Financial Inc.342,862$8.10M0.0%+3.4%0.141%
8/15/2025 AQR Capital Management LLC350,203$8.27M0.0%N/A0.144%
8/15/2025 Avenir Corp895,352$21.14M2.2%-1.0%0.368%
8/15/2025 AWH Capital L.P.165,250$3.90M4.6%+288.8%0.068%
8/15/2025 Aberdeen Wealth Management LLC9,491$224K0.1%N/A0.004%
8/14/2025 Sandia Investment Management LP22,505$531K1.4%+13.6%0.009%
8/14/2025 BW Gestao de Investimentos Ltda.715,065$16.88M0.7%+81.3%0.294%
8/14/2025 California State Teachers Retirement System162,297$3.83M0.0%+23.7%0.067%
8/14/2025 Raymond James Financial Inc.189,810$4.48M0.0%+5.1%0.078%
8/14/2025 Worldquant Millennium Advisors LLC13,358$315K0.0%N/A0.005%
8/14/2025 Canada Pension Plan Investment Board8,094$191K0.0%N/A0.003%
8/14/2025 Quantinno Capital Management LP51,543$1.22M0.0%+25.1%0.021%
8/14/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.1,379,752$32.58M0.1%N/A0.567%
8/14/2025 Treasurer of the State of North Carolina74,368$1.76M0.0%+9.7%0.031%
8/14/2025 The Manufacturers Life Insurance Company 36,363$859K0.0%-3.1%0.015%
8/14/2025 Sei Investments Co.219,126$5.17M0.0%-23.9%0.090%
8/14/2025 Kopernik Global Investors LLC636,226$15.02M1.6%-41.0%0.261%
8/14/2025 Frontier Capital Management Co. LLC5,460,743$128.93M1.2%+52.6%2.244%
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8/14/2025 Soviero Asset Management LP110,000$2.60M1.6%N/A0.045%
8/14/2025 Intact Investment Management Inc.7,319$173K0.0%+6.1%0.003%
8/14/2025 State Street Corp7,078,249$167.12M0.0%+7.6%2.909%
8/14/2025 Voss Capital LP1,400,000$33.05M2.3%-37.0%0.575%
8/14/2025 WINTON GROUP Ltd112,421$2.65M0.1%-3.7%0.046%
8/14/2025 North Growth Management Ltd.97,000$2.30M0.4%+5.4%0.040%
8/14/2025 California Public Employees Retirement System228,921$5.41M0.0%+21.9%0.094%
8/14/2025 Cerity Partners LLC45,116$1.07M0.0%+16.3%0.019%
8/13/2025 Gabelli Funds LLC25,053$592K0.0%N/A0.010%
8/13/2025 Gamco Investors INC. ET AL108,670$2.57M0.0%N/A0.045%
8/13/2025 Diametric Capital LP10,343$244K0.1%N/A0.004%
8/13/2025 Brown Advisory Inc.10,608$250K0.0%-9.1%0.004%
8/13/2025 Marshall Wace LLP74,831$1.77M0.0%-49.2%0.031%
8/13/2025 EverSource Wealth Advisors LLC1,520$36K0.0%-58.5%0.001%
8/13/2025 Invesco Ltd.19,577,241$462.22M0.1%+13.9%8.046%
8/13/2025 M&T Bank Corp10,219$241K0.0%N/A0.004%
8/13/2025 New York State Common Retirement Fund693,777$16.38M0.0%+13.4%0.285%
8/13/2025 Loomis Sayles & Co. L P1,059,209$25.01M0.0%+143.1%0.435%
8/13/2025 Norges Bank2,160,728$51.02M0.0%N/A0.888%
8/13/2025 State Board of Administration of Florida Retirement System122,366$2.89M0.0%+6.7%0.050%
8/13/2025 Korea Investment CORP3,986$94K0.0%N/A0.002%
8/13/2025 Quadrant Capital Group LLC13,058$308K0.0%+11.9%0.005%
8/13/2025 Russell Investments Group Ltd.328,182$7.75M0.0%+40.9%0.135%
8/12/2025 Advisors Asset Management Inc.45,183$1.07M0.0%-20.2%0.019%
8/12/2025 XTX Topco Ltd64,723$1.53M0.1%N/A0.027%
8/12/2025 Steward Partners Investment Advisory LLC1,210$29K0.0%-49.5%0.000%
8/12/2025 Prudential Financial Inc.150,008$3.77M0.0%+8.9%0.062%
8/12/2025 Rock Creek Group LP15,000$354K0.0%-40.0%0.006%
8/12/2025 Rhumbline Advisers287,247$6.78M0.0%-7.4%0.118%
8/12/2025 CenterBook Partners LP125,340$2.96M0.2%-69.8%0.052%
8/12/2025 Sfmg LLC11,652$275K0.0%+6.1%0.005%
8/12/2025 AXQ Capital LP15,609$369K0.1%N/A0.006%
8/12/2025 Legal & General Group Plc404,673$9.55M0.0%+3.5%0.166%
8/12/2025 MAI Capital Management4,259$101K0.0%+12.3%0.002%
8/12/2025 JPMorgan Chase & Co.91,322$2.16M0.0%+4.1%0.038%
8/12/2025 Entropy Technologies LP26,167$618K0.0%N/A0.011%
8/12/2025 Swiss National Bank302,191$7.14M0.0%+16.6%0.124%
8/12/2025 Hikari Tsushin Inc.45,403$1.07M0.1%+6.1%0.019%
8/12/2025 Ensign Peak Advisors Inc40,586$958K0.0%+6.1%0.017%
8/11/2025 Primecap Management Co. CA12,030,656$284.04M0.2%+19.6%4.944%
8/11/2025 Universal Beteiligungs und Servicegesellschaft mbH83,769$1.98M0.0%+290.3%0.034%
8/8/2025 Cetera Investment Advisers14,179$335K0.0%N/A0.006%
8/8/2025 Paragon Capital Management LLC48,710$1.15M0.6%+1.3%0.020%
8/8/2025 Creative Planning34,301$810K0.0%+78.8%0.014%
8/8/2025 Commonwealth of Pennsylvania Public School Empls Retrmt SYS38,732$914K0.0%+12.8%0.016%
8/8/2025 Police & Firemen s Retirement System of New Jersey60,391$1.43M0.0%+161.2%0.025%
8/8/2025 Geode Capital Management LLC2,513,161$59.35M0.0%+9.3%1.033%
8/8/2025 Everett Harris & Co. CA10,085$238K0.0%-67.9%0.004%
8/8/2025 PNC Financial Services Group Inc.13,924$329K0.0%-10.5%0.006%
8/8/2025 KBC Group NV6,126$145K0.0%-16.5%0.003%
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8/7/2025 Allworth Financial LP10,256$242K0.0%+24.1%0.004%
8/7/2025 BOK Financial Private Wealth Inc.9,367$221K0.0%-20.0%0.004%
8/7/2025 CSM Advisors LLC633,048$14.95M0.4%-0.8%0.260%
8/6/2025 Marco Investment Management LLC25,157$594K0.0%-14.0%0.010%
8/6/2025 Bryn Mawr Trust Advisors LLC72,728$1.72M0.1%+16.6%0.030%
8/6/2025 Savant Capital LLC26,359$622K0.0%N/A0.011%
8/6/2025 Modera Wealth Management LLC26,224$619K0.0%-5.8%0.011%
8/6/2025 Atlantic Union Bankshares Corp1,075$25K0.0%N/A0.000%
8/5/2025 Crestwood Advisors Group LLC81,774$1.93M0.0%+1.5%0.034%
8/5/2025 Bank of New York Mellon Corp868,206$20.50M0.0%+14.2%0.357%
(Data available from 1/1/2016 forward)

AMTM Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of AMTM shares?

During the previous two years, 388 institutional investors and hedge funds held shares of Amentum. The most heavily invested institutionals were American Securities LLC ($1.06B), Invesco Ltd. ($462.22M), Vanguard Group Inc. ($297.44M), Primecap Management Co. CA ($284.04M), State Street Corp ($167.12M), Frontier Capital Management Co. LLC ($128.93M), and Cooper Creek Partners Management LLC ($87.42M).Learn more on Amentum's institutional investors.

What percentage of Amentum's stock is owned by institutional investors?

39.93% of Amentum's stock is owned by institutional investors. Learn more on AMTM's institutional investor holdings.

Which institutional investors have been buying Amentum's stock?

Of the 352 institutional investors that purchased Amentum's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: American Securities LLC ($45.03M), Kovitz Investment Group Partners LLC ($14.79M), Primecap Management Co. CA ($12.03M), Invesco Ltd. ($11.78M), State Street Corp ($7.83M), Wellington Management Group LLP ($3.73M), and Norges Bank ($3.60M).

How much institutional buying is happening at Amentum?

Institutional investors have bought a total of 158,883,944 shares in the last 24 months. This purchase volume represents approximately $2.50B in transactions.

Which of Amentum's major shareholders have been selling company stock?

Of the 127 institutional investors that sold Amentum's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Kovitz Investment Group Partners LLC ($11.71M), Geode Capital Management LLC ($1.18M), Deutsche Bank AG ($919.31K), Voss Capital LP ($820.71K), Kopernik Global Investors LLC ($441.27K), Renaissance Technologies LLC ($429.50K), and UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($400.43K).

How much institutional selling is happening at Amentum?

Institutional investors have sold a total of 21,569,427 shares in the last 24 months. This volume of shares sold represents approximately $422.60M in transactions.


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This page (NYSE:AMTM) was last updated on 9/4/2025 by MarketBeat.com Staff
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