WHITE MTNS INS GROUP LTD

Ticker: WTM CUSIP: G9618E107 Class: COM

Magnetar Financial LLC's Holding History (CIK: 0001352851)

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

Q3 2025

Shares 881 Value ($000) $1,473 Avg Close $1784.36 Range $1659.17 - $1880.11

Q1 2025

Shares 118 Value ($000) $227 Avg Close $1882.39 Range $1803.96 - $1993.86

Q1 2018

Shares 559 Value ($000) $460 Avg Close $825.48 Range $786.23 - $858.09

Q4 2017

Shares 1,686 Value ($000) $1,435 Avg Close $874.10 Range $841.33 - $903.26

Q2 2017

Shares 647 Value ($000) $562 Avg Close $867.55 Range $845.41 - $900.05

Q1 2017

Shares 716 Value ($000) $630 Avg Close $895.74 Range $834.20 - $948.94

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	881	$1,473	$1784.36	$1659.17 - $1880.11
Q1 2025	118	$227	$1882.39	$1803.96 - $1993.86
Q1 2018	559	$460	$825.48	$786.23 - $858.09
Q4 2017	1,686	$1,435	$874.10	$841.33 - $903.26
Q2 2017	647	$562	$867.55	$845.41 - $900.05
Q1 2017	716	$630	$895.74	$834.20 - $948.94