AMTM — AMENTUM HOLDINGS INC

Ownership history in Hyperion Capital Advisors LP  ·  5 quarters on record

This page tracks every 13F SEC filing in which Hyperion Capital Advisors 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
6.98% (2025 Q4)
Avg. % of fund
2.7%
First filed
2024 Q4
Last filed
2025 Q4
Quarters held
5
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q4 ADDED 491,872 +71,864 +17.1% 6.98% $14.3M $29.00
2025 Q3 ADDED 420,008 +368,521 +715.8% 5.38% $10.1M $23.95
2025 Q2 ADDED 51,487 +32,901 +177.0% 0.76% $1.2M $23.61
2025 Q1 REDUCED 18,586 -977 -5.0% 0.18% $338K $18.20
2024 Q4 INITIATED 19,563 — — 0.21% $411K $21.03
% 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% Arvin Capital Management LP 8.94% 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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