AFFILIATED MANAGERS GROUP

Ticker: AMG CUSIP: 008252108 Class: COM

Polymer Capital Management (US) LLC's Holding History (CIK: 0001973324)

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

Q4 2025

Shares 2,811 Value ($000) $810 Avg Close $258.45 Range $230.09 - $299.69

Q3 2025

Shares 1,369 Value ($000) $326 Avg Close $220.39 Range $194.74 - $250.14

Q2 2025

Shares 2,139 Value ($000) $421 Avg Close $173.47 Range $139.20 - $199.47

Q1 2025

Shares 2,943 Value ($000) $495 Avg Close $174.30 Range $151.61 - $191.09

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,811	$810	$258.45	$230.09 - $299.69
Q3 2025	1,369	$326	$220.39	$194.74 - $250.14
Q2 2025	2,139	$421	$173.47	$139.20 - $199.47
Q1 2025	2,943	$495	$174.30	$151.61 - $191.09