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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
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 Officer2025-11-16897$22.07
$19.80kSell
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 Officer2025-11-151,403$22.07
$30.96kSell
Steven J. DemetriouExecutive Chair2025-11-0628,818$21.79
$627.94kSell

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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
American Securities LLC18.48%45,026,743$1.63BInstitution
Lindsay Goldberg Employee Coinv IV LP18.48%45,026,743$1.63BInsider
Goldberg 2014 LLC18.48%45,026,743$1.63BInsider
Alan E. Goldberg18.48%45,026,743$1.63BInsider
Asp Manager Corp18.02%43,893,904$1.59BInsider
Asp Amentum Investco LP18.02%43,893,904$1.59BInsider
Invesco Ltd9.08%22,116,835$800.85MInstitution
Blackrock Inc7.39%17,990,449$651.43MInstitution
Vanguard Group Inc6.39%15,554,691$563.24MInstitution
Primecap Management Co4.89%11,918,586$431.57MInstitution

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AMTM vs Specialty Business Service Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
AMTM46.21%53.79%Net BuyingNet Selling
ARMK83.76%16.24%Net BuyingNet Buying
DLB59.74%2.35%Net SellingNet Selling
MMS94.30%5.70%Net SellingNet Selling
AZZ93.76%5.48%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 79.36% institutional shareholders, 92.37% Amentum Holdings insiders, and 0.00% retail investors. Lindsay Goldberg Employee Coinv IV LP is the largest individual Amentum Holdings shareholder, owning 45.03M shares representing 18.48% of the company. Lindsay Goldberg Employee Coinv IV LP's Amentum Holdings shares are currently valued at $1.64B.

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