13F Filings/AMTM

AMENTUM HOLDINGS INC (AMTM): Institutional Ownership

Hedge funds and institutional managers reporting a position in AMTM · Industrials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
23
13F filers
Aggregate Value
$519.4M
Across holders
Last Price
$20.25
2026-06-26
Sector
Industrials
GICS
Holder activity6 new8 added9 reduced
Institutional Holders of AMTM
↗
23 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
PRIMECAP MANAGEMENT CO/CA/
CIK 0000763212
Institutional Manager12.09M$315.2M60.7%0.2%Reduced$-1.1MQ1 2026
Ruane, Cunniff & Goldfarb L.P.
CIK 0001720792
Hedge Fund1.62M$42.3M8.1%0.7%Reduced$-20.1MQ1 2026
ExodusPoint Capital Management, LP
CIK 0001736225
Hedge Fund1.18M$34.3M6.6%0.3%New—Q4 2025
Verition Fund Management LLC
CIK 0001454027
Hedge Fund1.30M$33.9M6.5%0.2%Added+$11.3MQ1 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund900K$23.5M4.5%0.0%Added+$6.8MQ1 2026
MOORE CAPITAL MANAGEMENT, LP
CIK 0001448574
Hedge Fund874K$22.8M4.4%0.5%Added+$10.4MQ1 2026
Gotham Asset Management, LLC
CIK 0001510387
Hedge Fund521K$13.6M2.6%0.0%Reduced$-3.0MQ1 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund496K$12.9M2.5%0.0%Added+$12.9MQ1 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
Hedge Fund118K$3.8M0.7%0.0%New—Q3 2024
Holocene Advisors, LP
CIK 0001700574
Hedge Fund123K$3.2M0.6%0.0%Added+$1.1MQ1 2026
SOROS FUND MANAGEMENT LLC
CIK 0001029160
Family Office108K$2.8M0.5%0.0%Reduced$-44KQ1 2026
GAMCO INVESTORS, INC. ET AL
CIK 0000807249
Institutional Manager95K$2.5M0.5%0.0%Added+$90KQ1 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund77K$2.0M0.4%0.0%Reduced$-1.8MQ1 2026
Brevan Howard Capital Management LP
CIK 0001512857
Hedge Fund77K$2.0M0.4%0.0%Added+$1.1MQ1 2026
MAVERICK CAPITAL LTD
CIK 0000934639
Hedge Fund46K$1.2M0.2%0.0%New—Q1 2026
Walleye Capital LLC
CIK 0001758720
Hedge Fund33K$868K0.2%0.0%Added+$689KQ1 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund19K$548K0.1%0.0%New—Q4 2025
BALYASNY ASSET MANAGEMENT LLC
CIK 0001218710
Hedge Fund18K$478K0.1%0.0%Reduced$-6.5MQ1 2026
Bridgewater Associates, LP
CIK 0001350694
Hedge Fund17K$445K0.1%0.0%Reduced$-31KQ1 2026
Ancora Advisors, LLC
CIK 0001446114
Hedge Fund13K$337K0.1%0.0%Reduced$-10.1MQ1 2026
PRIMECAP MANAGEMENT CO/CA/Reduced
Institutional Manager
$315.2M· 60.7% of total· 0.2% port· 12.09M sh· $-1.1M QoQ· Q1 2026
Ruane, Cunniff & Goldfarb L.P.Reduced
Hedge Fund
$42.3M· 8.1% of total· 0.7% port· 1.62M sh· $-20.1M QoQ· Q1 2026
ExodusPoint Capital Management, LPNew
Hedge Fund
$34.3M· 6.6% of total· 0.3% port· 1.18M sh· — QoQ· Q4 2025
Verition Fund Management LLCAdded
Hedge Fund
$33.9M· 6.5% of total· 0.2% port· 1.30M sh· +$11.3M QoQ· Q1 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$23.5M· 4.5% of total· 0.0% port· 900K sh· +$6.8M QoQ· Q1 2026
MOORE CAPITAL MANAGEMENT, LPAdded
Hedge Fund
$22.8M· 4.4% of total· 0.5% port· 874K sh· +$10.4M QoQ· Q1 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$13.6M· 2.6% of total· 0.0% port· 521K sh· $-3.0M QoQ· Q1 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$12.9M· 2.5% of total· 0.0% port· 496K sh· +$12.9M QoQ· Q1 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.New
Hedge Fund
$3.8M· 0.7% of total· 0.0% port· 118K sh· — QoQ· Q3 2024
Holocene Advisors, LPAdded
Hedge Fund
$3.2M· 0.6% of total· 0.0% port· 123K sh· +$1.1M QoQ· Q1 2026
SOROS FUND MANAGEMENT LLCReduced
Family Office
$2.8M· 0.5% of total· 0.0% port· 108K sh· $-44K QoQ· Q1 2026
GAMCO INVESTORS, INC. ET ALAdded
Institutional Manager
$2.5M· 0.5% of total· 0.0% port· 95K sh· +$90K QoQ· Q1 2026
Qube Research & Technologies LtdReduced
Hedge Fund
$2.0M· 0.4% of total· 0.0% port· 77K sh· $-1.8M QoQ· Q1 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$2.0M· 0.4% of total· 0.0% port· 77K sh· +$1.1M QoQ· Q1 2026
MAVERICK CAPITAL LTDNew
Hedge Fund
$1.2M· 0.2% of total· 0.0% port· 46K sh· — QoQ· Q1 2026
Walleye Capital LLCAdded
Hedge Fund
$868K· 0.2% of total· 0.0% port· 33K sh· +$689K QoQ· Q1 2026
MARSHALL WACE, LLPNew
Hedge Fund
$548K· 0.1% of total· 0.0% port· 19K sh· — QoQ· Q4 2025
BALYASNY ASSET MANAGEMENT LLCReduced
Hedge Fund
$478K· 0.1% of total· 0.0% port· 18K sh· $-6.5M QoQ· Q1 2026
Bridgewater Associates, LPReduced
Hedge Fund
$445K· 0.1% of total· 0.0% port· 17K sh· $-31K QoQ· Q1 2026
Ancora Advisors, LLCReduced
Hedge Fund
$337K· 0.1% of total· 0.0% port· 13K sh· $-10.1M QoQ· Q1 2026
TUDOR INVESTMENT CORP ET ALNew
Hedge Fund
$308K· 0.1% of total· 0.0% port· 12K sh· — QoQ· Q1 2026
Grantham, Mayo, Van Otterloo & Co. LLCNew
Institutional Manager
$303K· 0.1% of total· 0.0% port· 10K sh· — QoQ· Q4 2025
CITADEL ADVISORS LLCReduced
Hedge Fund
$120K· 0.0% of total· 0.0% port· 5K sh· $-4.6M QoQ· Q1 2026
1–20 of 23
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