AFFILIATED MANAGERS GROUP

Ticker: AMG CUSIP: 008252108 Class: COM

Summit Trail Advisors, LLC's Holding History (CIK: 0001698478)

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

Q4 2025

Shares 6,218 Value ($000) $1,793 Avg Close $258.45 Range $230.09 - $299.69

Q3 2025

Shares 6,839 Value ($000) $1,631 Avg Close $220.39 Range $194.74 - $250.14

Q2 2025

Shares 2,795 Value ($000) $550 Avg Close $173.47 Range $139.20 - $199.47

Q3 2024

Shares 1,573 Value ($000) $280 Avg Close $169.81 Range $152.32 - $189.75

Q4 2017

Shares 236 Value ($000) $49 Avg Close $188.42 Range $173.99 - $202.01

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,218	$1,793	$258.45	$230.09 - $299.69
Q3 2025	6,839	$1,631	$220.39	$194.74 - $250.14
Q2 2025	2,795	$550	$173.47	$139.20 - $199.47
Q3 2024	1,573	$280	$169.81	$152.32 - $189.75
Q4 2017	236	$49	$188.42	$173.99 - $202.01