AMENTUM HOLDINGS INC (AMTM) Institutional Ownership Changes & 13F Activity

AMENTUM HOLDINGS INC (AMTM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Invesco Ltd., Troluce Capital Advisors Llc, Goldman Sachs Group Inc, Millennium Management Llc, and Van Eck Associates Corp.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Envestnet Asset Management IncSell-12,189-19.8%49,420$1.02MQ2 2026Sep 23, 2026
State Street CorpBuy+72,731+1.4%5,151,772$106.49MQ2 2026Sep 22, 2026
Security National Bank Of Sioux City IowaBuy+5,565+31.3%23,326$482.15KQ2 2026Sep 18, 2026
Security National Bank Of So DakSell-165-0.6%25,964$536.68KQ2 2026Sep 18, 2026
Manufacturers Life Insurance Company, TheBuy+232,701+568.7%273,618$1.12MQ2 2026Sep 09, 2026
M&T Bank CorpSell-9,610-100.0%0$0.00Q2 2026Sep 04, 2026
Parkside Financial Bank & TrustBuy+11+2.0%559$11.56KQ2 2026Sep 04, 2026
Citadel Advisors LlcBuy+590,046+731.7%670,684$13.86MQ2 2026Sep 02, 2026
Brown, Lisle/Cummings, Inc.Sell-4-3.3%118$2.44KQ2 2026Sep 02, 2026
Cornerstone Financial Management LlcSell-16-100.0%0$0.00Q2 2026Aug 28, 2026
Corient Private Wealth LlcSell-1,990-6.7%27,543$569.34KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemSell-1,332-0.7%183,223$3.79MQ2 2026Aug 24, 2026
Clifford Swan Investment Counsel LlcSell-1,719-8.9%17,495$361.62KQ2 2026Aug 20, 2026
Mercer Global Advisors IncSell-2,478-16.0%12,996$268.63KQ2 2026Aug 19, 2026
Public Employees Retirement System Of OhioSell-2,378-5.0%45,464$939.74KQ2 2026Aug 17, 2026
Parvin Asset Management, LlcSell-393-39.2%610$12.61KQ2 2026Aug 17, 2026
Transamerica Financial Advisors, LlcSell-6-85.7%1$20.00Q2 2026Aug 17, 2026
Invesco Ltd.Buy+24,954,251—24,954,251$515.80MQ2 2026Aug 14, 2026
Troluce Capital Advisors LlcBuy+2,565,399+256.5%3,565,399$73.70MQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+1,580,428+139.7%2,711,866$56.05MQ2 2026Aug 14, 2026
Millennium Management LlcBuy+1,496,724+237.2%2,127,779$43.98MQ2 2026Aug 14, 2026
Van Eck Associates CorpBuy+1,441,254+263.2%1,988,898$41.11MQ2 2026Aug 14, 2026
Sequoia FundSell-1,085,769-66.9%537,213$11.10MQ2 2026Aug 14, 2026
Point72 Asset Management, L.P.Sell-980,579-60.1%649,984$13.44MQ2 2026Aug 14, 2026
Qube Research & Technologies LtdBuy+957,026+1237.0%1,034,395$21.38MQ2 2026Aug 14, 2026
Frontier Capital Management Co LlcSell-786,239-15.9%4,143,971$85.66MQ2 2026Aug 14, 2026
Verition Fund Management LlcBuy+721,388+55.6%2,019,334$41.74MQ2 2026Aug 14, 2026
Hrt Financial LpBuy+671,847—671,847$13.89MQ2 2026Aug 14, 2026
Two Sigma Investments, LpSell-615,909-68.4%284,268$5.88MQ2 2026Aug 14, 2026
Moore Capital Management, LpSell-508,514-58.2%365,096$7.55MQ2 2026Aug 14, 2026
Showing 30 of 439

Frequently asked questions about AMTM activity

  • Which institutional owners are buying AMTM?

    Institutional owners buying AMTM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in AMTM activity?

    "Buy" means an investor increased their reported position in AMTM compared to the prior reporting period. This reflects growing exposure to AMENTUM HOLDINGS INC (AMTM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in AMTM increasing?

    Institutional interest in AMTM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.