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Livermore
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Amentum Holdings, Inc.

AMTM
Exchange
NYSE
Industry
Services-Business Services, NEC
SEC CIK
0002011286

No open-market purchases or sales by Amentum Holdings, Inc. insiders were filed in the last 90 days; 464 institutions reported holding it in 13F filings for Q2 2026, worth $4.34B in total; Soros Fund Management is the only superinvestor holding it.

13F holders, Q2 2025

Institutional positions in Amentum Holdings, Inc. as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
461
+48 vs. Q1 2025
Shares held
200.3M
+8.87M (+4.6%) vs. Q1 2025
Total value
$4.73B
+$1.25B (+35.7%) vs. Q1 2025
New holders
113
233 more added
Sold out
65
100 more reduced

5 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting AMTM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2025: 461 institutions
Q1 2021: 0 institutionsQ2 2021: 0 institutionsQ3 2021: 0 institutionsQ4 2021: 0 institutionsQ1 2022: 0 institutionsQ2 2022: 0 institutionsQ3 2022: 0 institutionsQ4 2022: 0 institutionsQ1 2023: 0 institutionsQ2 2023: 0 institutionsQ3 2023: 0 institutionsQ4 2023: 0 institutionsQ1 2024: 0 institutionsQ2 2024: 0 institutionsQ3 2024: 492 institutionsQ4 2024: 451 institutionsQ1 2025: 418 institutionsQ2 2025: 461 institutionsQ3 2025: 462 institutionsQ4 2025: 483 institutionsQ1 2026: 486 institutionsQ2 2026: 464 institutions
Value heldQ2 2025: $4.73B
Q1 2021: $0Q2 2021: $0Q3 2021: $0Q4 2021: $0Q1 2022: $0Q2 2022: $0Q3 2022: $0Q4 2022: $0Q1 2023: $0Q2 2023: $0Q3 2023: $0Q4 2023: $0Q1 2024: $0Q2 2024: $0Q3 2024: $3.23BQ4 2024: $3.48BQ1 2025: $3.49BQ2 2025: $4.73BQ3 2025: $4.63BQ4 2025: $5.64BQ1 2026: $5.28BQ2 2026: $4.34B
Institutions holding AMTM and their total value by quarter
QuarterHoldersValue
Q2 2026464$4.34B
Q1 2026486$5.28B
Q4 2025483$5.64B
Q3 2025462$4.63B
Q2 2025461$4.73B
Q1 2025418$3.49B
Q4 2024451$3.48B
Q3 2024492$3.23B
Q2 20240$0
Q1 20240$0
Q4 20230$0
Q3 20230$0
Q2 20230$0
Q1 20230$0
Q4 20220$0
Q3 20220$0
Q2 20220$0
Q1 20220$0
Q4 20210$0
Q3 20210$0
Q2 20210$0
Q1 20210$0

Institutions, Q2 2025

Shares, value and share of portfolio for each institution holding Amentum Holdings, Inc.; share changes are against Q1 2025.

Institutions holding AMTM in Q2 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Dynamic Wealth Strategies, LLC55$1.30K0.00%+55New
Towarzystwo Funduszy Inwestycyjnych Pzu SA53$1.25K0.00%−1,297−96.1%Reduced
Brown, Lisle/Cummings, Inc.53$1.25K0.00%−57−51.8%Reduced
Rialto Wealth Management, LLC50$1.18K0.00%+23+85.2%Added
RMG Wealth Management LLC43$1.09K0.00%+43New
Wood Tarver Financial Group, LLC79$1.00K0.00%+4+5.3%Added
Sentry Investment Management LLC22$1.00K0.00%+22New
Atlantic Trust, LLC40$9450.00%+40New
Bruce G. Allen Investments, LLC40$9440.00%+40New
North Star Investment Management Corp.39$9210.00%+39New
Principal Securities, Inc.35$8260.00%−3−7.9%Reduced
Cullen/Frost Bankers, Inc.35$8260.00%+35New
MV Capital Management, Inc.34$8030.00%+1+3.0%Added
Creative Financial Designs Inc33$7790.00%+1+3.1%Added
CVA Family Office, LLC29$6850.00%00.0%Unchanged
JFS Wealth Advisors, LLC27$6380.00%+1+3.8%Added
1620 Investment Advisors, Inc.26$6140.00%−14−35.0%Reduced
South State Corp.24$5670.00%+4+20.0%Added
Logan Capital Management Inc24$5670.00%+24New
Financial Gravity Companies, Inc.24$5670.00%+24New
Red Tortoise LLC23$5430.00%+1+4.5%Added
NewSquare Capital LLC23$5430.00%+23New
AdvisorNet Financial, Inc22$5190.00%00.0%Unchanged
Whipplewood Advisors, LLC21$4960.00%+17+425.0%Added
Team Financial Group, LLC21$4960.00%+21New
Orion Capital Management LLC20$4720.00%+20New
New Millennium Group LLC19$4490.00%+1+5.6%Added
TD Capital Management LLC18$4250.00%+1+5.9%Added
Trust Co of Vermont18$4250.00%+18New
Creekmur Asset Management LLC16$3780.00%00.0%Unchanged
Prestige Wealth Management Group LLC14$3310.00%00.0%Unchanged
Costello Asset Management, INC13$3070.00%+13New
Kayne Anderson Rudnick Investment Management LLC12$2830.00%+8+200.0%Added
Annis Gardner Whiting Capital Advisors, LLC10$2370.00%+10New
Abound Wealth Management8$1890.00%00.0%Unchanged
UMA Financial Services, Inc.7$1660.00%00.0%Unchanged
IMA Wealth, Inc.7$1650.00%+7New
Cornerstone Planning Group LLC6$1520.00%+6New
Zions Bancorporation, National Association4$940.00%−3−42.9%Reduced
Morton Brown Family Wealth, LLC4$940.00%+4New
Archer Investment Corp3$720.00%−47−94.0%Reduced
SOA Wealth Advisors, LLC.3$710.00%00.0%Unchanged
Activest Wealth Management3$710.00%+3New
Crewe Advisors LLC3$710.00%+3New
Maryland Capital Advisors Inc.3$710.00%+3New
Dunhill Financial, LLC2$620.00%−19−90.5%Reduced
Park Place Capital Corp2$480.00%+2New
Private Wealth Asset Management, LLC2$470.00%00.0%Unchanged
First Horizon Advisors, Inc.2$470.00%+2New
Scarborough Advisors, LLC2$470.00%+2New
Iron Horse Wealth Management, LLC2$470.00%+2New
SWAN Capital LLC1$240.00%+1New
Cetera Trust Company, N.A1$240.00%+1New
WPG Advisers, LLC1$240.00%+1New
Pacer Advisors, Inc.1$200.00%+1New
Catalyst Capital Advisors LLC0$20.00%0New
Picton Mahoney Asset Management8$00.00%00.0%Unchanged
Lazard Asset Management LLC13$00.00%+13New
Hanson & Doremus Investment Management18$00.00%+18New
Capital Advisors, Ltd. LLC9$00.00%+9New
Onefund, LLC20$00.00%+20New
Balyasny Asset Management LLC0$00.00%−1,880,887−100.0%Sold out
Cooper Creek Partners Management LLC0$00.00%−1,223,986−100.0%Sold out
Ghisallo Capital Management LLC0$00.00%−635,569−100.0%Sold out
Jane Street Group, LLC0$00.00%−601,760−100.0%Sold out
Davidson Kempner Capital Management LP0$00.00%−450,000−100.0%Sold out
Monashee Investment Management LLC0$00.00%−360,000−100.0%Sold out
Castalian Partners, LLC0$00.00%−304,500−100.0%Sold out
Twinbeech Capital LP0$00.00%−225,438−100.0%Sold out
Eisler Capital Management Ltd.0$00.00%−126,889−100.0%Sold out
Seven Grand Managers, LLC0$00.00%−100,000−100.0%Sold out
Walleye Trading LLC0$00.00%−68,470−100.0%Sold out
Caption Management, LLC0$00.00%−68,400−100.0%Sold out
Centiva Capital, LP0$00.00%−65,258−100.0%Sold out
Wolf Hill Capital Management, LP0$00.00%−63,857−100.0%Sold out
Weiss Asset Management LP0$00.00%−60,953−100.0%Sold out
Engineers Gate Manager LP0$00.00%−53,830−100.0%Sold out
Simplex Trading, LLC0$00.00%−52,827−100.0%Sold out
Freestone Capital Holdings, LLC0$00.00%−40,027−100.0%Sold out
Allianz Asset Management GmbH0$00.00%−38,700−100.0%Sold out
Sig Brokerage, LP0$00.00%−35,052−100.0%Sold out
Wolverine Trading, LLC0$00.00%−32,816−100.0%Sold out
ABS Direct Equity Fund LLC0$00.00%−32,500−100.0%Sold out
Renaissance Technologies LLC0$00.00%−31,400−100.0%Sold out
Gsa Capital Partners LLP0$00.00%−30,488−100.0%Sold out
Quantbot Technologies LP0$00.00%−28,362−100.0%Sold out
Carlson Capital L P0$00.00%−28,000−100.0%Sold out
Two Sigma Advisers, LP0$00.00%−25,500−100.0%Sold out
Quest Partners LLC0$00.00%−23,780−100.0%Sold out
Kirtland Hills Capital Management, LLC0$00.00%−18,542−100.0%Sold out
Jacobs Levy Equity Management, Inc0$00.00%−17,533−100.0%Sold out
Armstrong Henry H Associates Inc0$00.00%−17,081−100.0%Sold out
Paralel Advisors LLC0$00.00%−16,329−100.0%Sold out
Walleye Capital LLC0$00.00%−14,069−100.0%Sold out
Clear Street Markets LLC0$00.00%−13,062−100.0%Sold out
Rangeley Capital, LLC0$00.00%−12,500−100.0%Sold out
Evoke Wealth, LLC0$00.00%−12,235−100.0%Sold out
One68 Global Capital, LLC0$00.00%−12,000−100.0%Sold out
Prelude Capital Management, LLC0$00.00%−11,360−100.0%Sold out
Caldwell Investment Management Ltd.0$00.00%−11,000−100.0%Sold out