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Amentum (AMTM) Institutional Ownership

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$22.26 +0.53 (+2.43%)
Closing price 07/31/2026 03:59 PM Eastern
Extended Trading
$22.24 -0.01 (-0.06%)
As of 07/31/2026 08:00 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 Massive. 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)
244
Total
Institutional Inflows
(last 12 months)
$1.36B
Number of
Institutional Sellers
(last 12 months)
136
Total
Institutional Outflows
(last 12 months)
$536.98M
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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
7/10/2026 Wedge Capital Management L L P NC187,832$3.88M0.1%+14.1%0.077%
7/10/2026 Hudson Value Partners LLC250,185$5.17M1.3%+22.7%0.102%
7/9/2026 Steadtrust LLC30,400$628K0.3%-33.0%0.012%
7/7/2026 GAMMA Investing LLC4,958$102K0.0%-12.4%0.002%
6/16/2026Empowered Funds LLC7,900$206K0.0%N/A0.003%
6/8/2026 Pine Valley Investments Ltd Liability Co79,275$2.07M0.1%+4.5%0.032%
5/27/2026Alpine Woods Capital Investors LLC8,402$219K0.1%N/A0.003%
5/19/2026Western Wealth Management LLC1,252$33K0.0%N/A0.001%
5/19/2026Rovida Investment Management Ltd315,000$8.21M1.0%N/A0.129%
5/19/2026Bank of America Corp DE2,405,041$62.72M0.0%+107.8%0.984%
5/18/2026California State Teachers Retirement System184,555$4.81M0.0%+23.1%0.076%
5/18/2026Royal Bank of Canada231,742$6.04M0.0%-13.1%0.095%
5/18/2026Ruane Cunniff & Goldfarb L.P.1,622,982$42.33M0.7%-32.2%0.664%
5/18/2026Empowered Funds LLC7,900$206K0.0%N/A0.003%
5/16/2026The Manufacturers Life Insurance Company 40,917$1.07M0.0%+10.8%0.017%
5/16/2026Maverick Capital Ltd.46,335$1.21M0.0%N/A0.019%
5/16/2026Quantinno Capital Management LP145,574$3.80M0.0%+86.7%0.060%
5/15/2026Troluce Capital Advisors LLC1,000,000$26.08M1.6%N/A0.409%
5/15/2026Entropy Technologies LP26,895$701K0.0%N/A0.011%
5/14/2026Gabelli Funds LLC69,783$1.82M0.0%+226.3%0.029%
5/14/2026Gamco Investors INC. ET AL95,331$2.49M0.0%+3.8%0.039%
5/14/2026Public Employees Retirement System of Ohio47,842$1.25M0.0%-2.8%0.020%
5/14/2026Sei Investments Co.294,668$7.69M0.0%+35.8%0.121%
5/14/2026State of Wyoming8,302$217K0.0%-30.3%0.003%
5/13/2026Cetera Investment Advisers24,375$636K0.0%+14.6%0.010%
5/13/2026CI Investments Inc.420,068$10.96M0.1%-1.3%0.172%
5/13/2026First Trust Advisors LP228,083$5.95M0.0%-39.6%0.094%
5/8/2026PNC Financial Services Group Inc.13,674$357K0.0%+8.3%0.006%
5/7/2026Dimensional Fund Advisors LP3,787,420$98.77M0.0%+106.6%1.553%
5/7/2026 Hahn Capital Management LLC51,120$1.33M0.8%-17.5%0.021%
5/7/2026KBC Group NV5,431$142K0.0%-7.1%0.002%
5/7/2026Swiss National Bank313,391$8.17M0.0%+0.5%0.128%
5/6/2026California Public Employees Retirement System277,052$7.23M0.0%-0.6%0.114%
5/6/2026Gryphon Financial Partners LLC18,883$492K0.1%+16.0%0.008%
5/6/2026Modera Wealth Management LLC18,402$480K0.0%-16.1%0.008%
5/6/2026Bessemer Group Inc.125,952$3.28M0.0%+7,142.8%0.052%
5/5/2026Bank of New York Mellon Corp908,599$23.70M0.0%-1.5%0.372%
5/5/2026Illinois Municipal Retirement Fund83,407$2.18M0.0%N/A0.034%
5/5/2026NFSG Corp1,350$35K0.0%N/A0.001%
5/4/2026Bryn Mawr Trust Advisors LLC116,871$3.05M0.1%+14.6%0.048%
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5/4/2026Principal Financial Group Inc.744,728$19.42M0.0%+2.2%0.305%
5/1/2026Fifth Third Bancorp273,316$7.13M0.0%+10,456.8%0.112%
4/28/2026 Intrinsic Value Partners LLC13,899$362K0.3%-16.7%0.006%
4/28/2026 Stephens Inc. AR23,395$610K0.0%+3.7%0.010%
4/27/2026Moran Wealth Management LLC19,585$511K0.0%N/A0.008%
4/27/2026 PFG Investments LLC10,332$269K0.0%+9.6%0.004%
4/27/2026 New York State Teachers Retirement System165,329$4.31M0.0%-0.4%0.068%
4/23/2026 Formidable Asset Management LLC13,473$351K0.1%+88.1%0.006%
4/22/2026Janney Montgomery Scott LLC12,728$332K0.0%N/A0.005%
4/22/2026 Pictet Asset Management Holding SA26,893$701K0.0%+6.5%0.011%
4/22/2026 Sterling Capital Management LLC14,408$376K0.0%-18.0%0.006%
4/21/2026 Louisiana State Employees Retirement System68,200$1.78M0.0%N/A0.028%
4/20/2026Delphi Management Inc. MA37,873$988K1.2%-22.9%0.016%
4/20/2026 Legal Advantage Investments Inc.28,900$754K0.4%+52.9%0.012%
4/17/2026 Telos Capital Management Inc.189,901$4.95M0.5%+1.3%0.078%
4/16/2026SG Americas Securities LLC274,602$7.16M0.0%-20.5%0.113%
4/15/2026 Weatherly Asset Management L. P.9,690$253K0.0%N/A0.004%
3/17/2026Rockefeller Capital Management L.P.4,412$128K0.0%-22.5%0.002%
3/9/2026Corient Private Wealth LLC36,949$1.07M0.0%-5.4%0.015%
2/26/2026Alpine Global Management LLC25,000$725K0.1%-66.7%0.010%
2/25/2026 Hahn Capital Management LLC61,962$1.80M1.0%-5.8%0.025%
2/19/2026Invesco Ltd.21,834,003$633.19M0.1%-1.3%8.951%
2/19/2026Corient Private Wealth LLC36,872$1.07M0.0%-5.6%0.015%
2/18/2026Mercer Global Advisors Inc. ADV15,502$453K0.0%N/A0.006%
2/18/2026Vident Advisory LLC382,540$11.09M0.1%-15.9%0.157%
2/18/2026State of Tennessee Department of Treasury46,262$1.34M0.0%-28.7%0.019%
2/18/2026Mackenzie Financial Corp15,479$453K0.0%N/A0.006%
2/18/2026XTX Topco Ltd44,821$1.30M0.0%-9.0%0.018%
2/18/2026Utah Retirement Systems8,339$242K0.0%N/A0.003%
2/18/2026Wellington Management Group LLP18,948$549K0.0%-3.8%0.008%
2/18/2026Symmetry Investments LP10,000$290K0.0%N/A0.004%
2/18/2026Twinbeech Capital LP137,453$3.99M0.3%-38.3%0.056%
2/18/2026Susquehanna Fundamental Investments LLC219,931$6.38M0.2%+304.8%0.090%
2/18/2026Oxford Asset Management LLP18,629$540K0.2%N/A0.008%
2/18/2026Old West Investment Management LLC19,355$561K0.1%N/A0.008%
2/18/2026Millennium Management LLC61,187$1.77M0.0%-90.5%0.025%
2/18/2026Moore Capital Management LP475,314$13.78M0.2%+16.7%0.195%
2/18/2026Gotham Asset Management LLC635,430$18.43M0.1%+159.5%0.260%
2/18/2026Aristotle Capital Boston LLC358,867$10.41M0.6%-12.3%0.147%
2/18/2026Balyasny Asset Management L.P.267,999$7.77M0.0%+644.2%0.110%
2/18/2026Boothbay Fund Management LLC7,214$209K0.0%N/A0.003%
2/18/2026American Trust Investment Advisors LLC29,175$846K0.5%-4.3%0.012%
2/18/2026683 Capital Management LLC835,000$24.22M1.1%-34.5%0.342%
2/17/2026Guggenheim Capital LLC9,439$274K0.0%N/A0.004%
2/17/2026AQR Capital Management LLC1,452,049$42.11M0.0%+778.9%0.595%
2/17/2026Cetera Investment Advisers21,274$617K0.0%-8.3%0.009%
2/17/2026FIL Ltd1,429,384$41.45M0.0%-8.3%0.586%
2/17/2026Price T Rowe Associates Inc. MD129,482$3.76M0.0%+9.6%0.053%
2/17/2026Soviero Asset Management LP178,000$5.16M2.5%+14.8%0.073%
2/17/2026Osaic Holdings Inc.29,126$845K0.0%+9.5%0.012%
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2/17/2026Public Employees Retirement System of Ohio49,232$1.43M0.0%-4.1%0.020%
2/17/2026California State Teachers Retirement System149,912$4.35M0.0%-7.6%0.061%
2/17/2026Russell Investments Group Ltd.437,016$12.67M0.0%+50.9%0.179%
2/17/2026 Maryland State Retirement & Pension System29,913$867K0.0%+1.6%0.012%
2/17/2026Atom Investors LP43,737$1.27M0.1%-69.7%0.018%
2/17/2026State of Wisconsin Investment Board103,682$3.01M0.0%+13.4%0.043%
2/17/2026Captrust Financial Advisors31,935$926K0.0%+7.6%0.013%
2/17/2026ExodusPoint Capital Management LP1,184,186$34.34M0.3%+1,015.2%0.485%
2/17/2026Royal Bank of Canada266,543$7.73M0.0%+10.1%0.109%
2/17/2026Blair William & Co. IL79,965$2.32M0.0%+57.9%0.033%


AMTM Institutional Ownership - Frequently Asked Questions

During the previous two years, 484 institutional investors and hedge funds held shares of Amentum. The most heavily invested institutionals were American Securities LLC ($1.06B), Invesco Ltd. ($633.19M), Vanguard Group Inc. ($446.94M), Primecap Management Co. CA ($351.68M), Legacy Advisors LLC ($284.61M), State Street Corp ($146.79M), and Frontier Capital Management Co. LLC ($128.93M).Learn more on Amentum's institutional investors.

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

Of the 447 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), Invesco Ltd. ($14.32M), Primecap Management Co. CA ($12.24M), Legacy Advisors LLC ($9.81M), State Street Corp ($7.83M), and Norges Bank ($5.89M).

Institutional investors have bought a total of 51,749,457 shares in the last 24 months. This purchase volume represents approximately $1.36B in transactions.

Of the 136 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: Millennium Management LLC ($4.61M), Van ECK Associates Corp ($2.54M), State Street Corp ($1.77M), Voss Capital LP ($1.60M), Vanguard Group Inc. ($1.12M), Thompson Siegel & Walmsley LLC ($808.49K), and Ruane Cunniff & Goldfarb L.P. ($800.77K).

Institutional investors have sold a total of 21,100,198 shares in the last 24 months. This volume of shares sold represents approximately $536.98M in transactions.


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This page (NYSE:AMTM) was last updated on 8/1/2026 by MarketBeat.com Staff.
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