AMENTUM HOLDINGS INC

Ticker: AMTM CUSIP: 023939101 Class: COM

Rossby Financial, LCC's Holding History (CIK: 0002056510)

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

Q4 2025

Shares 288 Value ($000) $8 Avg Close $25.56 Range $21.11 - $31.87

Q3 2025

Shares 288 Value ($000) $7 Avg Close $24.35 Range $21.71 - $26.63

Q2 2025

Shares 288 Value ($000) $7 Avg Close $20.90 Range $16.01 - $24.33

Q1 2025

Shares 272 Value ($000) $6 Avg Close $20.37 Range $16.95 - $24.30

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	288	$8	$25.56	$21.11 - $31.87
Q3 2025	288	$7	$24.35	$21.71 - $26.63
Q2 2025	288	$7	$20.90	$16.01 - $24.33
Q1 2025	272	$6	$20.37	$16.95 - $24.30