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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
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
Catalyst Capital Advisors LLC0$20.00%0New
Pacer Advisors, Inc.1$200.00%+1New
SWAN Capital LLC1$240.00%+1New
Cetera Trust Company, N.A1$240.00%+1New
WPG Advisers, LLC1$240.00%+1New
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
Park Place Capital Corp2$480.00%+2New
Dunhill Financial, LLC2$620.00%−19−90.5%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
Archer Investment Corp3$720.00%−47−94.0%Reduced
Zions Bancorporation, National Association4$940.00%−3−42.9%Reduced
Morton Brown Family Wealth, LLC4$940.00%+4New
Cornerstone Planning Group LLC6$1520.00%+6New
IMA Wealth, Inc.7$1650.00%+7New
UMA Financial Services, Inc.7$1660.00%00.0%Unchanged
Abound Wealth Management8$1890.00%00.0%Unchanged
Annis Gardner Whiting Capital Advisors, LLC10$2370.00%+10New
Kayne Anderson Rudnick Investment Management LLC12$2830.00%+8+200.0%Added
Costello Asset Management, INC13$3070.00%+13New
Prestige Wealth Management Group LLC14$3310.00%00.0%Unchanged
Creekmur Asset Management LLC16$3780.00%00.0%Unchanged
TD Capital Management LLC18$4250.00%+1+5.9%Added
Trust Co of Vermont18$4250.00%+18New
New Millennium Group LLC19$4490.00%+1+5.6%Added
Orion Capital Management LLC20$4720.00%+20New
Whipplewood Advisors, LLC21$4960.00%+17+425.0%Added
Team Financial Group, LLC21$4960.00%+21New
AdvisorNet Financial, Inc22$5190.00%00.0%Unchanged
Red Tortoise LLC23$5430.00%+1+4.5%Added
NewSquare Capital LLC23$5430.00%+23New
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
1620 Investment Advisors, Inc.26$6140.00%−14−35.0%Reduced
JFS Wealth Advisors, LLC27$6380.00%+1+3.8%Added
CVA Family Office, LLC29$6850.00%00.0%Unchanged
Creative Financial Designs Inc33$7790.00%+1+3.1%Added
MV Capital Management, Inc.34$8030.00%+1+3.0%Added
Principal Securities, Inc.35$8260.00%−3−7.9%Reduced
Cullen/Frost Bankers, Inc.35$8260.00%+35New
North Star Investment Management Corp.39$9210.00%+39New
Bruce G. Allen Investments, LLC40$9440.00%+40New
Atlantic Trust, LLC40$9450.00%+40New
Wood Tarver Financial Group, LLC79$1.00K0.00%+4+5.3%Added
Sentry Investment Management LLC22$1.00K0.00%+22New
RMG Wealth Management LLC43$1.09K0.00%+43New
Rialto Wealth Management, LLC50$1.18K0.00%+23+85.2%Added
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
Dynamic Wealth Strategies, LLC55$1.30K0.00%+55New
Montag A & Associates Inc55$1.30K0.00%+55New
SBI Securities Co., Ltd.56$1.32K0.00%+27+93.1%Added
High Note Wealth, LLC63$1.49K0.00%+3+5.0%Added
True Wealth Design, LLC66$1.56K0.00%+63+2,100.0%Added
Assetmark, Inc67$1.58K0.00%+66+6,600.0%Added
Eastern Bank68$1.61K0.00%−1,027−93.8%Reduced
Hughes Financial Services, LLC68$1.75K0.00%+3+4.6%Added
First Financial Corp79$1.86K0.00%00.0%Unchanged
Minot DeBlois Advisors LLC79$1.86K0.00%+4+5.3%Added
Missouri Trust & Investment Co79$1.86K0.00%+4+5.3%Added
Aventus Investment Advisors, Inc.83$1.96K0.00%+83New
Capital Analysts, LLC78$2.00K0.00%+1+1.3%Added
Centerpoint Advisors, LLC69$2.00K0.00%+69New
Anchor Investment Management, LLC87$2.05K0.00%−438−83.4%Reduced
Bell Investment Advisors, Inc89$2.10K0.00%+59+196.7%Added
Asset Dedication, LLC92$2.17K0.00%+12+15.0%Added
Hilltop National Bank98$2.31K0.00%+98New
Rosenberg Matthew Hamilton99$2.34K0.00%+5+5.3%Added
Evermay Wealth Management LLC99$2.34K0.00%−501−83.5%Reduced
Godsey & Gibb Associates106$2.50K0.00%+6+6.0%Added
Harbor Investment Advisory, LLC106$2.50K0.00%+6+6.0%Added
Private Wealth Management Group, LLC106$2.50K0.00%+106New
Kozak & Associates, Inc.105$2.53K0.00%+6+6.1%Added
Grove Bank & Trust108$2.55K0.00%+19+21.3%Added
Geneos Wealth Management Inc.111$2.62K0.00%+3+2.8%Added
Horizon Investments, LLC113$2.67K0.00%+113New
Roxbury Financial LLC118$2.79K0.00%+6+5.4%Added
Virtus ETF Advisers LLC121$2.86K0.00%+121New
Hemington Wealth Management135$3.00K0.00%+5+3.8%Added
NBC Securities, Inc.161$3.00K0.00%+91+130.0%Added
Mirae Asset Global Investments Co., Ltd.128$3.02K0.00%+128New
ORG Partners LLC130$3.11K0.00%00.0%Unchanged
South Plains Financial, Inc.136$3.20K0.00%+136New
McIlrath & Eck, LLC136$3.21K0.00%+6+4.6%Added
NBT Bank N A138$3.26K0.00%−637−82.2%Reduced
Rothschild Investment LLC141$3.33K0.00%+66+88.0%Added
Union Savings Bank134$3.34K0.00%+9+7.2%Added
Ramirez Asset Management, Inc.142$3.35K0.00%+42+42.0%Added
GPS Wealth Strategies Group, LLC143$3.38K0.00%+5+3.6%Added