AMTM — AMENTUM HOLDINGS INC

Ownership history in Arvin Capital Management LP  ·  9 quarters on record

This page tracks every 13F SEC filing in which Arvin Capital Management LP reported a position in AMENTUM HOLDINGS INC (AMTM). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position
10.34% (2025 Q2)
Avg. % of fund
4.82%
First filed
2024 Q4
Last filed
2025 Q4
Quarters held
9
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q4 REDUCED 164,500 -1,471,992 -89.9% 0.90% $4.8M $29.00
2025 Q4 UNCHANGED 1,636,492 — 0% 8.94% $47.5M $29.00
2025 Q3 ADDED 1,636,492 +1,536,492 +1536.5% 7.08% $39.2M $23.95
2025 Q2 REDUCED 100,000 -2,039,434 -95.3% 0.48% $2.4M $23.61
5 older quarters hidden  —  Sign in free or upgrade to Premium to see full history
% of Fund (quarterly)    AMTM price (monthly, adj. close)

Other funds also holding AMTM

As of 2025 Q4 — sorted by position size

AMERICAN SECURITIES LLC 3Y 7Y 100.0% BRIGHTLINE CAPITAL MANAGEMENT, LLC 3Y 7Y 16.32% SEGRA CAPITAL MANAGEMENT, LLC 3Y 12.43% Hyperion Capital Advisors LP 3Y 6.98% AWH Capital, L.P. 3Y 7Y 6.29% GRIZZLYROCK CAPITAL, LLC 6.19% AVENIR CORP 3Y 7Y 2.68% Soviero Asset Management, LP 3Y 2.47% COOPER CREEK PARTNERS MANAGEMENT LLC 3Y 7Y 2.03% FRONTIER CAPITAL MANAGEMENT CO LLC 3Y 7Y 1.78%
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