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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
Lindsay Goldberg Employee Coinv IV LP18.42%45,026,743$966.72MInsider
Goldberg 2014 LLC18.42%45,026,743$966.72MInsider
Alan E. Goldberg18.42%45,026,743$966.72MInsider
Asp Amentum Investco LP17.95%43,893,904$942.40MInsider
Asp Manager Corp17.95%43,893,904$942.40MInsider
Cacti Asset Management LLC0.36%881,692$18.93MInstitution
Steven J. Demetriou0.35%861,218$18.49MInsider
John C. Vollmer0.18%429,842$9.23MInsider
John E. Heller0.15%376,019$8.07MInsider
Hudson Value Partners LLC0.10%250,185$5.37MInstitution

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AMTM vs Specialty Business Service Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
AMTM0.07%92.10%Net Selling
UNF0.05%99.95%Net Selling
DLB0.07%2.39%Net SellingNet Selling
AZZ0.09%5.71%Net SellingNet Selling
FA0.12%98.33%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 0.07% institutional shareholders, 92.10% Amentum Holdings insiders, and 7.83% retail investors. Lindsay Goldberg Employee Coinv IV LP is the largest individual Amentum Holdings shareholder, owning 45.03M shares representing 18.42% of the company. Lindsay Goldberg Employee Coinv IV LP's Amentum Holdings shares are currently valued at $966.72M.

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