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 (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Fmr Llc, Frontier Capital Management Co Llc, Mirae Asset Global Etfs Holdings Ltd., Cooper Creek Partners Management Llc, and Aqr Capital Management Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Advisors Asset Management, Inc.Sell-31,064-100.0%0$0.00Q4 2025Aug 26, 2026
Ensign Peak Advisors, IncSell-20,600-68.7%9,386$272.19KQ4 2025Aug 18, 2026
Algert Global LlcSell-49,077-22.1%172,533$5.00MQ4 2025Aug 11, 2026
National Philanthropic TrustSell-6,390-18.9%27,437$795.67KQ4 2025May 15, 2026
Strategic Wealth Partners, Ltd.Buy+898—898$26.04KQ4 2025May 12, 2026
Union Savings BankBuy+2—2$58.00Q4 2025Mar 06, 2026
Anchor Investment Management, LlcBuy+87—87$2.52KQ4 2025Feb 26, 2026
Td Capital Management LlcBuy+18—18$522.00Q4 2025Feb 26, 2026
Hahn Capital Management LlcBuy+61,962—61,962$1.80MQ4 2025Feb 25, 2026
Midfirst BankBuy+33—33$957.00Q4 2025Feb 25, 2026
Bell Investment Advisors, IncBuy+60—60$1.74KQ4 2025Feb 24, 2026
Mv Capital Management, Inc.Sell-1-2.8%35$1.01KQ4 2025Feb 23, 2026
Sunbelt Securities, Inc.Buy+1—1$29.00Q4 2025Feb 20, 2026
Corient Private Wealth LlcBuy+36,872—36,872$1.07MQ4 2025Feb 19, 2026
Vident Advisory, LlcBuy+382,540—382,540$11.09MQ4 2025Feb 18, 2026
Raymond James Financial IncBuy+168,045—168,045$4.87MQ4 2025Feb 18, 2026
State Of Tennessee, Department Of TreasuryBuy+46,262—46,262$1.66MQ4 2025Feb 18, 2026
Mercer Global Advisors IncBuy+15,502—15,502$452.63KQ4 2025Feb 18, 2026
Mackenzie Financial CorpBuy+15,479—15,479$452.64KQ4 2025Feb 18, 2026
Vermillion & White Wealth Management Group, LlcBuy+1,905—1,905$55.24KQ4 2025Feb 18, 2026
Newedge Advisors, LlcBuy+598—598$17.34KQ4 2025Feb 18, 2026
Garton & Associates Financial Advisors LlcBuy+107—107$3.10KQ4 2025Feb 18, 2026
Fmr LlcBuy+6,707,304—6,707,304$194.51MQ4 2025Feb 17, 2026
Frontier Capital Management Co LlcBuy+5,772,976—5,772,976$167.42MQ4 2025Feb 17, 2026
Mirae Asset Global Etfs Holdings Ltd.Buy+1,961,927—1,961,927$56.90MQ4 2025Feb 17, 2026
Cooper Creek Partners Management LlcBuy+1,553,074—1,553,074$45.04MQ4 2025Feb 17, 2026
Aqr Capital Management LlcBuy+1,452,049—1,452,049$42.11MQ4 2025Feb 17, 2026
Fil LtdBuy+1,429,384—1,429,384$41.45MQ4 2025Feb 17, 2026
Exoduspoint Capital Management, LpBuy+1,184,186—1,184,186$34.34MQ4 2025Feb 17, 2026
Bank Of America CorpBuy+1,157,427—1,157,427$33.57MQ4 2025Feb 17, 2026
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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.