AMENTUM HOLDINGS INC

Ticker: AMTM CUSIP: 023939101 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 28,498 Value ($000) $826 Avg Close $25.56 Range $21.11 - $31.87

Q3 2025

Shares 20,607 Value ($000) $494 Avg Close $24.35 Range $21.71 - $26.63

Q2 2025

Shares 67,908 Value ($000) $1,603 Avg Close $20.90 Range $16.01 - $24.33

Q1 2025

Shares 104,684 Value ($000) $1,905 Avg Close $20.37 Range $16.95 - $24.30

Q4 2024

Shares 86,036 Value ($000) $1,809 Avg Close $25.85 Range $18.38 - $34.47

Q3 2024

Shares 1,048 Value ($000) $34 Avg Close $28.49 Range $23.58 - $34.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	28,498	$826	$25.56	$21.11 - $31.87
Q3 2025	20,607	$494	$24.35	$21.71 - $26.63
Q2 2025	67,908	$1,603	$20.90	$16.01 - $24.33
Q1 2025	104,684	$1,905	$20.37	$16.95 - $24.30
Q4 2024	86,036	$1,809	$25.85	$18.38 - $34.47
Q3 2024	1,048	$34	$28.49	$23.58 - $34.50