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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 Officer2026-05-063,314$24.89
$82.49kSell
Travis Barton JohnsonChief Financial Officer2026-05-064,097$24.89
$101.97kSell
Jill L. BruningChief Technology Officer2026-05-062,731$24.89
$67.97kSell
John E. HellerChief Executive Officer2026-05-068,184$24.89
$203.70kSell
Sean Thomas MullenChief Growth Officer2026-05-062,762$24.89
$68.75kSell
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

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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 LLC18.43%45,026,743$1.03BInsider
Alan E. Goldberg18.43%45,026,743$1.03BInsider
Lindsay Goldberg Employee Coinv IV LP18.43%45,026,743$1.03BInsider
American Securities LLC18.43%45,026,743$1.03BInstitution
Asp Amentum Investco LP17.97%43,893,904$1.01BInsider
Asp Manager Corp17.97%43,893,904$1.01BInsider
Invesco Ltd8.79%21,473,778$493.47MInstitution
Blackrock Inc7.30%17,841,283$409.99MInstitution
Primecap Management Co4.95%12,085,294$277.72MInstitution
Legacy Advisors LLC3.71%9,064,278$208.30MInstitution

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AMTM vs Specialty Business Service Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
AMTM48.01%51.99%Net SellingNet Selling
DLB61.15%2.39%Net SellingNet Selling
UNF33.95%66.05%Net Selling
AZZ92.71%5.73%Net SellingNet Selling
MMS94.15%5.85%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 85.10% institutional shareholders, 92.17% Amentum Holdings insiders, and 0.00% retail investors. Goldberg 2014 LLC is the largest individual Amentum Holdings shareholder, owning 45.03M shares representing 18.43% of the company. Goldberg 2014 LLC's Amentum Holdings shares are currently valued at $1.05B.

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