AMENTUM HOLDINGS INC

Ticker: AMTM CUSIP: 023939101 Class: COM

FIRST MANHATTAN CO. LLC.'s Holding History (CIK: 0000728083)

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

Q4 2025

Shares 14,117 Value ($000) $409 Avg Close $25.56 Range $21.11 - $31.87

Q3 2025

Shares 14,200 Value ($000) $340 Avg Close $24.35 Range $21.71 - $26.63

Q2 2025

Shares 15,435 Value ($000) $364 Avg Close $20.90 Range $16.01 - $24.33

Q1 2025

Shares 16,009 Value ($000) $291 Avg Close $20.37 Range $16.95 - $24.30

Q4 2024

Shares 17,602 Value ($000) $370 Avg Close $25.85 Range $18.38 - $34.47

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	14,117	$409	$25.56	$21.11 - $31.87
Q3 2025	14,200	$340	$24.35	$21.71 - $26.63
Q2 2025	15,435	$364	$20.90	$16.01 - $24.33
Q1 2025	16,009	$291	$20.37	$16.95 - $24.30
Q4 2024	17,602	$370	$25.85	$18.38 - $34.47