Free Trial
→ This Social Security Shift Could Boost Benefits by 400% (From InvestorPlace) (Ad) Free AMTM Stock Alerts

Amentum (AMTM) Institutional Ownership

Amentum logo
$24.18 -0.79 (-3.16%)
Closing price 08/1/2025 03:59 PM Eastern
Extended Trading
$24.25 +0.07 (+0.29%)
As of 08/1/2025 07:01 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.
Compare

Institutional Ownership Changes (13F Filings) for Amentum (NYSE:AMTM)

Current
Institutional Ownership
Percentage
39.93%
Number of
Institutional Buyers
(last 12 months)
314
Total
Institutional Inflows
(last 12 months)
$2.16B
Number of
Institutional Sellers
(last 12 months)
115
Total
Institutional Outflows
(last 12 months)
$376.47M
Get AMTM Insider Trade Alerts

Want to know when executives and insiders are buying or selling Amentum stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily.

Skip Chart & View Institutional Buying and Selling Data

AMTM Institutional Buying and Selling by Quarter

Amentum Major Shareholders & Ownership History

Export to Excel
Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/1/2025Teacher Retirement System of Texas64,845$1.53M0.0%+1.1%0.027%
8/1/2025Y Intercept Hong Kong Ltd198,726$4.69M0.1%N/A0.082%
8/1/2025Envestnet Asset Management Inc.96,785$2.29M0.0%-0.4%0.040%
7/31/2025 Nisa Investment Advisors LLC33,630$794K0.0%+10.3%0.014%
7/31/2025 Oppenheimer Asset Management Inc.12,783$302K0.0%N/A0.005%
7/31/2025 Leavell Investment Management Inc.16,138$381K0.0%+39.0%0.007%
7/31/2025 State of New Jersey Common Pension Fund D100,104$2.36M0.0%+2.5%0.041%
7/31/2025 Washington Trust Advisors Inc.10,379$245K0.0%-80.7%0.004%
7/31/2025 Caitong International Asset Management Co. Ltd1,520$36K0.0%+1,517.0%0.001%
7/30/2025 Ethic Inc.9,149$215K0.0%N/A0.004%
7/29/2025 Stephens Inc. AR27,900$659K0.0%-14.8%0.011%
7/29/2025 Mutual of America Capital Management LLC19,379$458K0.0%-7.5%0.008%
7/29/2025 American Securities LLC45,026,743$1.06B100.0%+2.6%18.505%
7/28/2025 New York State Teachers Retirement System137,435$3.25M0.0%-0.8%0.056%
7/28/2025 Wilmington Savings Fund Society FSB20,849$492K0.0%+4.9%0.009%
7/28/2025 RFG Advisory LLC102,171$2.41M0.1%N/A0.042%
7/25/2025 Yousif Capital Management LLC56,966$1.35M0.0%+22.7%0.023%
7/25/2025 CWM LLC17,482$413K0.0%+303.4%0.007%
7/25/2025 OFI Invest Asset Management2,051$48K0.0%N/A0.001%
7/25/2025 Vanguard Personalized Indexing Management LLC14,605$352K0.0%N/A0.006%
7/24/2025 Blair William & Co. IL56,568$1.34M0.0%+4.4%0.023%
7/24/2025 US Bancorp DE26,122$617K0.0%+10.9%0.011%
7/23/2025 Maryland State Retirement & Pension System51,806$1.22M0.0%+5.7%0.021%
7/23/2025 Louisiana State Employees Retirement System70,500$1.67M0.0%+20.7%0.029%
7/23/2025 Country Club Bank172,318$4.04M0.3%+83.8%0.071%
7/23/2025 Mraz Amerine & Associates Inc.8,550$202K0.0%N/A0.004%
7/22/2025 Chung Wu Investment Group LLC9,744$230K0.2%N/A0.004%
7/21/2025 Intrinsic Value Partners LLC16,679$394K0.4%+5.0%0.007%
7/21/2025 Hahn Capital Management LLC68,748$1.62M0.8%+4.7%0.028%
7/18/2025 Hudson Value Partners LLC185,701$4.38M1.5%-1.4%0.076%
7/18/2025 PFG Investments LLC11,283$266K0.0%N/A0.005%
7/18/2025 Truist Financial Corp22,516$532K0.0%+3.7%0.009%
7/17/2025 Janney Montgomery Scott LLC10,014$236K0.0%-70.3%0.004%
7/16/2025 Cahaba Wealth Management Inc.14,472$342K0.0%+6.1%0.006%
7/16/2025 Signaturefd LLC2,241$53K0.0%+27.0%0.001%
7/16/2025 State of Alaska Department of Revenue89,832$2.12M0.0%+13.2%0.037%
7/16/2025 CX Institutional8,216$194K0.0%+1,240.3%0.003%
7/15/2025 Public Employees Retirement System of Ohio51,304$1.21M0.0%+7.7%0.021%
7/14/2025 GAMMA Investing LLC4,443$105K0.0%+41.6%0.002%
7/14/2025 Clear Harbor Asset Management LLC40,053$946K0.1%-1.2%0.016%
This Crypto Is Set to Explode in January (Ad)

This Could Be the Most Important Crypto Law in History While the world celebrates Bitcoin becoming 2025’s top-performing asset, smart hedge funds are accumulating elsewhere. During the upcoming Crypto Hedge Fund Summit, you'll discover exactly which coins they’ve loaded up on before this historic vote.

Click here to claim your free seat!
7/14/2025 Toth Financial Advisory Corp10,358$245K0.0%+29.1%0.004%
7/11/2025 CX Institutional8,216$194K0.0%+1,240.3%0.003%
7/11/2025 UMB Bank n.a.4,121$97K0.0%+11.6%0.002%
7/10/2025 Wealth Enhancement Advisory Services LLC155,104$3.76M0.0%+2.2%0.064%
7/8/2025 Lingohr Asset Management GmbH10,000$236K0.4%N/A0.004%
7/8/2025 Parallel Advisors LLC4,180$99K0.0%+195.2%0.002%
7/7/2025 Wesbanco Bank Inc.24,466$578K0.0%+1.7%0.010%
7/2/2025 Neville Rodie & Shaw Inc.29,442$695K0.1%-44.8%0.012%
7/1/2025 Cacti Asset Management LLC848,946$19.91M1.5%+1.7%0.349%
6/18/2025Voya Investment Management LLC628,154$11.43M0.0%+55.4%0.258%
6/6/2025 Hahn Capital Management LLC65,633$1.20M0.6%-15.1%0.027%
5/29/2025Rhumbline Advisers310,103$5.64M0.0%+5.1%0.127%
5/20/2025Focus Partners Wealth23,759$432K0.0%-88.2%0.010%
5/20/2025Security National Bank of Sioux City Iowa IA17,069$311K0.2%+11.8%0.007%
5/16/2025Jones Financial Companies Lllp7,357$134K0.0%-80.1%0.003%
5/16/2025Ruane Cunniff & Goldfarb L.P.2,393,039$43.55M0.8%-1.8%0.983%
5/16/2025Nexpoint Asset Management L.P.43,900$799K0.1%+144.0%0.018%
5/16/2025Millennium Management LLC2,011,792$36.62M0.0%+68.1%0.827%
5/16/2025Jacobs Levy Equity Management Inc.17,533$319K0.0%-87.9%0.007%
5/16/2025Engine Capital Management LP635,255$11.56M2.2%+2.2%0.261%
5/16/2025BW Gestao de Investimentos Ltda.394,400$7.18M0.2%N/A0.162%
5/16/2025Advisors Asset Management Inc.56,602$1.03M0.0%-20.6%0.023%
5/16/2025American Trust Investment Advisors LLC35,688$650K0.3%-5.7%0.015%
5/16/2025Ancora Advisors LLC68,770$1.25M0.0%+105,700.0%0.028%
5/15/2025AWH Capital L.P.42,500$774K1.1%N/A0.017%
5/15/2025First Manhattan CO. LLC.16,009$291K0.0%-9.1%0.007%
5/15/2025Royal Bank of Canada582,195$10.60M0.0%-5.9%0.239%
5/15/2025Alpine Global Management LLC100,000$1.82M0.5%+300.0%0.041%
5/15/2025Ghisallo Capital Management LLC635,569$11.57M1.0%N/A0.261%
5/15/2025MAI Capital Management3,791$69K0.0%-17.6%0.002%
5/15/2025Quarry LP1,670$30K0.0%N/A0.001%
5/15/2025Vident Advisory LLC292,857$5.33M0.1%+1,818.7%0.120%
5/15/2025Kodai Capital Management LP65,540$1.19M0.0%N/A0.027%
5/15/2025Carlson Capital L.P.28,000$510K0.2%N/A0.012%
5/15/2025Eisler Capital Management Ltd.126,889$2.31M0.0%N/A0.052%
5/14/2025Avenir Corp904,162$16.46M1.7%+367.3%0.372%
5/14/2025Keeley Teton Advisors LLC128,081$2.33M0.3%+621.3%0.053%
5/14/2025CSM Advisors LLC638,057$11.61M0.6%-0.2%0.262%
5/14/2025Comerica Bank248,718$4.53M0.0%+409.8%0.102%
5/14/2025Penn Capital Management Company LLC889,434$16.23M1.6%+99.3%0.366%
5/14/2025Monashee Investment Management LLC360,000$6.55M0.8%N/A0.148%
5/14/2025Voss Capital LP2,220,709$40.42M3.1%+393.7%0.913%
5/14/2025Quantbot Technologies LP28,362$516K0.0%N/A0.012%
5/13/2025Northern Trust Corp854,423$15.55M0.0%+1.4%0.351%
5/13/2025Versor Investments LP39,400$717K0.1%N/A0.016%
5/13/2025Summit Securities Group LLC13,062$238K0.0%N/A0.005%
5/13/2025Freestone Capital Holdings LLC40,027$728K0.0%N/A0.016%
5/13/2025Raymond James Financial Inc.180,572$3.29M0.0%+111.0%0.074%
5/13/2025Seven Grand Managers LLC100,000$1.82M0.4%N/A0.041%
5/13/2025Kovitz Investment Group Partners LLC3,075,305$55.97M0.3%-79.2%1.264%
This Crypto Is Set to Explode in January (Ad)

Free summit reveals where Bitcoin goes after $120k Don't miss this rare opportunity to learn directly from the experts who are driving this market…

Reserve your free spot now.
5/13/2025Rock Creek Group LP25,000$455K0.1%N/A0.010%
5/13/2025Russell Investments Group Ltd.232,933$4.24M0.0%+85.5%0.096%
5/12/2025Public Sector Pension Investment Board455,129$8.28M0.0%+47.2%0.187%
5/12/2025Nuveen LLC287,801$5.24M0.0%N/A0.118%
5/12/2025Invesco Ltd.17,191,110$312.88M0.1%+24.1%7.065%
5/12/2025Wolverine Asset Management LLC33,240$605K0.0%N/A0.014%
5/12/2025Everett Harris & Co. CA31,410$572K0.0%-25.0%0.013%
5/12/2025Swiss National Bank259,200$4.72M0.0%-1.5%0.107%
5/12/2025 American Securities LLC43,893,904$798.87M100.0%N/A18.039%
5/9/2025 Mutual of America Capital Management LLC20,957$381K0.0%+11.5%0.009%
(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, 357 institutional investors and hedge funds held shares of Amentum. The most heavily invested institutionals were American Securities LLC ($1.06B), Invesco Ltd. ($312.88M), Vanguard Group Inc. ($297.44M), State Street Corp ($236.31M), Primecap Management Co. CA ($183.12M), Cooper Creek Partners Management LLC ($87.42M), and Kovitz Investment Group Partners LLC ($55.97M).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 314 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 ($10.06M), Invesco Ltd. ($9.39M), State Street Corp ($7.33M), Wellington Management Group LLP ($3.73M), and Cooper Creek Partners Management LLC ($3.32M).

How much institutional buying is happening at Amentum?

Institutional investors have bought a total of 144,589,036 shares in the last 24 months. This purchase volume represents approximately $2.16B in transactions.

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

Of the 115 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), Renaissance Technologies LLC ($429.50K), UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC ($400.43K), Focus Partners Wealth ($251.38K), and Envestnet Asset Management Inc. ($221.33K).

How much institutional selling is happening at Amentum?

Institutional investors have sold a total of 19,615,570 shares in the last 24 months. This volume of shares sold represents approximately $376.47M in transactions.


Related Companies

This page (NYSE:AMTM) was last updated on 8/2/2025 by MarketBeat.com Staff
From Our Partners
Elon’s BIGGEST warning yet?
Tesla's About to Prove Everyone Wrong... Again Back in 2018, when Jeff Brown told everyone to buy Tesla… ...
Brownstone Research | Sponsored
China just unlocked Nvidia’s AI chips—what that means for you
Tired of Missing Big AI Moves Like Nvidia? You’re not the problem—your trading system is. Tim’s XGPT system...
Timothy Sykes | Sponsored
This Social Security Shift Could Boost Benefits by 400%
If you currently collect Social Security—or plan to in the future—this may be one of the most important update...
InvestorPlace | Sponsored
Man Who Called Nvidia at $1.10 Says Buy This Now...
In 2004, one man called Nvidia before just about anyone knew it existed. Now, this same guy says a new comp...
The Oxford Club | Sponsored
A new rule goes live in July — and the banks are quietly crushing it
A little-known regulation quietly goes into effect this July. And it's already being exploited by Wall Stre...
American Alternative | Sponsored
Your blueprint for crypto wealth
Mark August 12th on your calendar. 27 of crypto's most successful minds are about to reveal everything…
Crypto 101 Media | Sponsored
Jeff Bezos Launches "ChatGPT Killer"?
Amazon just launched Nova—its secretive new AI system designed to rival ChatGPT. Bezos says he now spends 95% ...
Stansberry Research | Sponsored
Alien rocks potentially worth trillions…
It might look like just a weird rock—but it’s tied to a discovery 60 Minutes says could be worth up to $16 tri...
Porter & Company | Sponsored