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Ruane, Cunniff & Goldfarb L.P.

Position in AMTM — Amentum Holdings, Inc.

CIK 1720792 New York, NY

Position in AMTM

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$11,104,192
-$31,223,178 QoQ
Shares Held
537,213
-66.9% QoQ
Ownership
0.220%
of shares outstanding
% of Portfolio
0.17%
of 13F equity value
Holder Rank
#47
of 462 holders
Holding Since
Sep 2024
8 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in AMTM Over Time

Shares Held

Position Value (USD)

Position in Specialty Business Services

Industrials · as of Jun 30, 2026

Ruane, Cunniff & Goldfarb L.P. holds $11,104,192 across 1 Specialty Business Services name. AMTM ranks #1 (100.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 AMTM
Amentum Holdings, Inc.
This page
537,213 $11,104,192

All Filings in AMTM

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8 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $11,104,192 537,213
2026-03-31 $42,327,370 1,622,982
2025-12-31 $69,429,741 2,394,129
2025-09-30 $58,048,764 2,423,748
2025-06-30 $57,649,552 2,441,743
2025-03-31 $43,553,309 2,393,039
2024-12-31 $51,235,262 2,436,294
2024-09-30 $81,608,270 2,530,489