AMTM

Amentum Holdings, Inc.

Services-Business Services, NEC · SIC 7389CIK 2011286Held by 5 tracked managersEDGAR filings ↗10-K/10-Q ↗

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5 managers · Q2 2026 13F

13F bookWeight

Ruane Cunniff

Ruane CunniffPosition history →

0.17%

(66.9%)

$11.1M

$6.43B13F book · 2026-06-30

Royce & Associates

Royce & AssociatesPosition history →

0.12%

+26.8%

$14.4M

$12.42B13F book · 2026-06-30

Soros Fund Management

Soros family officePosition history →

0.03%

+9.9%

$2.4M

$7.62B13F book · 2026-06-30

Holocene Advisors

Holocene AdvisorsPosition history →

<0.01%

(27.7%)

$1.8M

$43.69B13F book · 2026-06-30

Bridgewater Associates

Bridgewater AssociatesPosition history →

<0.01%

+176.9%

$1.0M

$24.38B13F book · 2026-06-30

Weight = position value ÷ the manager's total 13F long-equity value in the same filing — one definition for every row. “1st obs.” marks a position with no earlier stored 13F to compare against — it is not shown as a purchase.