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THOMPSON SIEGEL & WALMSLEY LLC

Position in AMTM — Amentum Holdings, Inc.

CIK 1008322 RICHMOND, VA

Position in AMTM

as of Jun 30, 2026 · filed Aug 11, 2026
Position Value
$47,167,803
+$7,372,749 QoQ
Shares Held
2,281,945
+49.5% QoQ
Ownership
0.933%
of shares outstanding
% of Portfolio
0.89%
of 13F equity value
Holder Rank
#17
of 461 holders
Holding Since
Sep 2024
8 quarters on record
Voting authority Sole 95% Shared 0% None 4%

Common Shares in AMTM Over Time

Shares Held

Position Value (USD)

Position in Specialty Business Services

Industrials · as of Jun 30, 2026

THOMPSON SIEGEL & WALMSLEY LLC holds $100,390,803 across 3 Specialty Business Services names. AMTM ranks #2 (47.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
2 AMTM
Amentum Holdings, Inc.
This page
2,281,945 $47,167,803

All Filings in AMTM

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8 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $47,167,803 2,281,945
2026-03-31 $39,795,054 1,525,884
2025-12-31 $55,732,461 1,921,809
2025-09-30 $65,390,637 2,730,298
2025-06-30 $65,799,015 2,786,913
2025-03-31 $60,540,079 3,326,378
2024-12-31 $40,980,824 1,948,684
2024-09-30 $11,037,304 342,242