AFFILIATED MANAGERS GROUP

Ticker: AMG CUSIP: 008252108 Class: COM

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

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

Q4 2025

Shares 341 Value ($000) $98 Avg Close $258.45 Range $230.09 - $299.69

Q3 2025

Shares 345 Value ($000) $80 Avg Close $220.39 Range $194.74 - $250.14

Q2 2025

Shares 358 Value ($000) $70 Avg Close $173.47 Range $139.20 - $199.47

Q1 2025

Shares 347 Value ($000) $56 Avg Close $174.30 Range $151.61 - $191.09

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	341	$98	$258.45	$230.09 - $299.69
Q3 2025	345	$80	$220.39	$194.74 - $250.14
Q2 2025	358	$70	$173.47	$139.20 - $199.47
Q1 2025	347	$56	$174.30	$151.61 - $191.09