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. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Sequoia Fund and Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Sequoia FundSell-771,1471,622,982$42,327,370
Q4 2025Sequoia FundSell-29,6192,394,129$69,429,741
Q3 2025Sequoia FundSell-17,9952,423,748$58,048,765
Q2 2025Sequoia FundBuy48,7042,441,743$57,649,558
Q1 2025Sequoia FundSell-43,2552,393,039$43,553,310
Q1 2025Renaissance Technologies LLCBuy20,40031,400$571,480
Q4 2024Renaissance Technologies LLCSell-429,50011,000$231,330
Q4 2024Sequoia FundSell-94,1952,436,294$51,235,263
Q3 2024Sequoia FundBuy2,530,4892,530,489$81,608,270
Q3 2024Renaissance Technologies LLCBuy440,500440,500$14,206,125

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.

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