WHITE MTNS INS GROUP LTD

Ticker: WTM CUSIP: G9618E107 Class: COM

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q4 2025

Shares 1,098 Value ($000) $2,282 Avg Close $1955.46 Range $1648.00 - $2143.25

Q4 2021

Shares 156 Value ($000) $158 Avg Close $1056.38 Range $978.51 - $1137.50

Q3 2020

Shares 1,636 Value ($000) $1,274 Avg Close $864.63 Range $752.10 - $961.96

Q4 2018

Shares 1,008 Value ($000) $865 Avg Close $891.29 Range $832.88 - $942.35

Q4 2016

Shares 315 Value ($000) $263 Avg Close $838.09 Range $815.04 - $874.69

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,098	$2,282	$1955.46	$1648.00 - $2143.25
Q4 2021	156	$158	$1056.38	$978.51 - $1137.50
Q3 2020	1,636	$1,274	$864.63	$752.10 - $961.96
Q4 2018	1,008	$865	$891.29	$832.88 - $942.35
Q4 2016	315	$263	$838.09	$815.04 - $874.69