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NYSE: AMTM
Amentum Holdings Inc Stock Ownership - Who owns Amentum Holdings?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Amentum Holdings Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Stephen A. ArnetteChief Operating Officer2026-03-02750$30.70
$23.03kSell
Mary Michele T. StChief Legal Officer GC2026-02-172,308$30.05
$69.36kSell
John E. HellerChief Executive Officer2026-01-2819,768$35.71
$705.92kSell
Sean Thomas MullenChief Growth Officer2025-12-174,194$28.67
$120.24kSell
Darren BurtonChief People Officer2025-12-051,392$28.88
$40.20kSell
Steven J. DemetriouExecutive Chair2025-11-1717,077$21.49
$366.98kSell
Stephen A. ArnetteChief Operating Officer2025-11-17287$21.49
$6.17kSell
Stephen A. ArnetteChief Operating Officer2025-11-161,120$22.07
$24.72kSell
Stephen A. ArnetteChief Operating Officer2025-11-161,231$22.07
$27.17kSell
Stephen A. ArnetteChief Operating Officer2025-11-16897$22.07
$19.80kSell

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Net Insider Buy/Sell (L12M) Ownership

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AMTM Shareholders

What type of owners hold Amentum Holdings Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Goldberg 2014 LLC18.46%45,026,743$1.22BInsider
Alan E. Goldberg18.46%45,026,743$1.22BInsider
American Securities LLC18.46%45,026,743$1.22BInstitution
Lindsay Goldberg Employee Coinv IV LP18.46%45,026,743$1.22BInsider
Asp Manager Corp17.99%43,893,904$1.19BInsider
Asp Amentum Investco LP17.99%43,893,904$1.19BInsider
Invesco Ltd8.95%21,834,003$591.05MInstitution
Blackrock Inc7.16%17,459,099$472.62MInstitution
Vanguard Group Inc6.32%15,411,745$417.20MInstitution
Primecap Management Co4.97%12,126,927$328.28MInstitution

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AMTM vs Specialty Business Service Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
AMTM47.52%52.48%Net SellingNet Selling
DLB61.35%2.37%Net SellingNet Selling
UNF33.39%66.61%Net SellingNet Selling
MMS94.45%5.55%Net SellingNet Buying
AZZ94.54%5.46%Net SellingNet Selling
View Top Specialty Business Service Stocks

Amentum Holdings Stock Ownership FAQ

Who owns Amentum Holdings?

Amentum Holdings (NYSE: AMTM) is owned by 83.56% institutional shareholders, 92.30% Amentum Holdings insiders, and 0.00% retail investors. Goldberg 2014 LLC is the largest individual Amentum Holdings shareholder, owning 45.03M shares representing 18.46% of the company. Goldberg 2014 LLC's Amentum Holdings shares are currently valued at $1.22B.

If you're new to stock investing, here's how to buy Amentum Holdings stock.
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