WHITE MTNS INS GROUP LTD

Ticker: WTM CUSIP: G9618E107 Class: COM

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q4 2025

Shares 4,165 Value ($000) $8,655 Avg Close $1955.46 Range $1648.00 - $2143.25

Q3 2025

Shares 4,232 Value ($000) $7,074 Avg Close $1784.36 Range $1659.17 - $1880.11

Q2 2025

Shares 4,280 Value ($000) $7,686 Avg Close $1778.53 Range $1678.87 - $1937.23

Q1 2025

Shares 4,472 Value ($000) $8,612 Avg Close $1882.39 Range $1803.96 - $1993.86

Q4 2024

Shares 4,549 Value ($000) $8,848 Avg Close $1889.39 Range $1708.50 - $2023.00

Q3 2024

Shares 4,533 Value ($000) $7,689 Avg Close $1743.65 Range $1666.22 - $1847.78

Q2 2024

Shares 4,547 Value ($000) $8,264 Avg Close $1768.70 Range $1665.71 - $1899.21

Q1 2024

Shares 4,823 Value ($000) $8,654 Avg Close $1676.26 Range $1475.00 - $1849.99

Q4 2023

Shares 5,172 Value ($000) $7,784 Avg Close $1486.19 Range $1401.01 - $1562.63

Q3 2023

Shares 4,602 Value ($000) $6,883 Avg Close $1535.39 Range $1370.75 - $1617.00

Q2 2023

Shares 4,653 Value ($000) $6,463 Avg Close $1407.80 Range $1319.05 - $1540.09

Q1 2023

Shares 4,392 Value ($000) $6 Avg Close $1434.16 Range $1312.00 - $1560.21

Q4 2022

Shares 4,489 Value ($000) $6 Avg Close $1355.05 Range $1276.05 - $1435.45

Q3 2022

Shares 4,591 Value ($000) $5,982 Avg Close $1293.71 Range $1172.00 - $1393.48

Q2 2022

Shares 4,508 Value ($000) $5,618 Avg Close $1161.60 Range $1030.38 - $1291.50

Q1 2022

Shares 4,736 Value ($000) $5,381 Avg Close $1046.91 Range $982.60 - $1141.97

Q4 2021

Shares 4,961 Value ($000) $5,030 Avg Close $1056.38 Range $978.51 - $1137.50

Q3 2021

Shares 4,921 Value ($000) $5,264 Avg Close $1116.81 Range $1056.96 - $1179.20

Q2 2021

Shares 4,628 Value ($000) $5,313 Avg Close $1167.46 Range $1100.61 - $1243.00

Q1 2021

Shares 4,738 Value ($000) $5,282 Avg Close $1118.45 Range $994.91 - $1267.52

Q4 2020

Shares 4,829 Value ($000) $4,832 Avg Close $940.82 Range $778.11 - $1024.02

Q3 2020

Shares 4,739 Value ($000) $3,692 Avg Close $864.63 Range $752.10 - $961.96

Q2 2020

Shares 4,953 Value ($000) $4,398 Avg Close $901.27 Range $813.24 - $1012.83

Q1 2020

Shares 4,988 Value ($000) $4,539 Avg Close $1035.04 Range $629.21 - $1168.21

Q4 2019

Shares 4,488 Value ($000) $5,006 Avg Close $1090.77 Range $1054.00 - $1131.50

Q3 2019

Shares 4,066 Value ($000) $4,391 Avg Close $1066.63 Range $1025.25 - $1104.14

Q2 2019

Shares 4,067 Value ($000) $4,154 Avg Close $961.99 Range $906.22 - $1052.17

Q1 2019

Shares 4,097 Value ($000) $3,792 Avg Close $905.92 Range $850.75 - $961.49

Q4 2018

Shares 4,534 Value ($000) $3,889 Avg Close $891.29 Range $832.88 - $942.35

Q3 2018

Shares 4,440 Value ($000) $4,155 Avg Close $926.90 Range $895.01 - $980.89

Q2 2018

Shares 4,699 Value ($000) $4,260 Avg Close $880.88 Range $804.40 - $933.70

Q1 2018

Shares 5,439 Value ($000) $4,474 Avg Close $825.48 Range $786.23 - $858.09

Q4 2017

Shares 5,753 Value ($000) $4,897 Avg Close $874.10 Range $841.33 - $903.26

Q3 2017

Shares 5,974 Value ($000) $5,120 Avg Close $859.82 Range $838.65 - $888.00

Q2 2017

Shares 5,913 Value ($000) $5,136 Avg Close $867.55 Range $845.41 - $900.05

Q1 2017

Shares 6,106 Value ($000) $5,373 Avg Close $895.74 Range $834.20 - $948.94

Q4 2016

Shares 6,001 Value ($000) $5,017 Avg Close $838.09 Range $815.04 - $874.69

Q3 2016

Shares 5,741 Value ($000) $4,765 Avg Close $824.01 Range $804.44 - $852.58

Q2 2016

Shares 5,653 Value ($000) $4,760 Avg Close $815.85 Range $786.33 - $845.37

Q1 2016

Shares 5,903 Value ($000) $4,738 Avg Close $748.05 Range $689.31 - $809.99

Q4 2015

Shares 5,822 Value ($000) $4,231 Avg Close $765.83 Range $721.00 - $808.00

Q3 2015

Shares 5,654 Value ($000) $4,225 Avg Close $719.51 Range $645.00 - $778.19

Q2 2015

Shares 5,499 Value ($000) $3,602 Avg Close $663.32 Range $635.00 - $704.50

Q1 2015

Shares 4,274 Value ($000) $2,926 Avg Close $659.70 Range $618.00 - $696.48

Q4 2014

Shares 4,224 Value ($000) $2,662 Avg Close $635.98 Range $610.00 - $682.87

Q3 2014

Shares 4,157 Value ($000) $2,619 Avg Close $624.10 Range $599.35 - $645.00

Q2 2014

Shares 4,132 Value ($000) $2,514 Avg Close $595.51 Range $583.51 - $608.63

Q1 2014

Shares 4,171 Value ($000) $2,502 Avg Close $583.55 Range $557.26 - $603.88

Q4 2013

Shares 4,284 Value ($000) $2,584 Avg Close $589.37 Range $566.30 - $606.94

Q3 2013

Shares 4,689 Value ($000) $2,662 Avg Close $580.72 Range $555.51 - $615.88

Q2 2013

Shares 4,713 Value ($000) $2,710 Avg Close $583.58 Range $561.79 - $615.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	4,165	$8,655	$1955.46	$1648.00 - $2143.25
Q3 2025	4,232	$7,074	$1784.36	$1659.17 - $1880.11
Q2 2025	4,280	$7,686	$1778.53	$1678.87 - $1937.23
Q1 2025	4,472	$8,612	$1882.39	$1803.96 - $1993.86
Q4 2024	4,549	$8,848	$1889.39	$1708.50 - $2023.00
Q3 2024	4,533	$7,689	$1743.65	$1666.22 - $1847.78
Q2 2024	4,547	$8,264	$1768.70	$1665.71 - $1899.21
Q1 2024	4,823	$8,654	$1676.26	$1475.00 - $1849.99
Q4 2023	5,172	$7,784	$1486.19	$1401.01 - $1562.63
Q3 2023	4,602	$6,883	$1535.39	$1370.75 - $1617.00
Q2 2023	4,653	$6,463	$1407.80	$1319.05 - $1540.09
Q1 2023	4,392	$6	$1434.16	$1312.00 - $1560.21
Q4 2022	4,489	$6	$1355.05	$1276.05 - $1435.45
Q3 2022	4,591	$5,982	$1293.71	$1172.00 - $1393.48
Q2 2022	4,508	$5,618	$1161.60	$1030.38 - $1291.50
Q1 2022	4,736	$5,381	$1046.91	$982.60 - $1141.97
Q4 2021	4,961	$5,030	$1056.38	$978.51 - $1137.50
Q3 2021	4,921	$5,264	$1116.81	$1056.96 - $1179.20
Q2 2021	4,628	$5,313	$1167.46	$1100.61 - $1243.00
Q1 2021	4,738	$5,282	$1118.45	$994.91 - $1267.52
Q4 2020	4,829	$4,832	$940.82	$778.11 - $1024.02
Q3 2020	4,739	$3,692	$864.63	$752.10 - $961.96
Q2 2020	4,953	$4,398	$901.27	$813.24 - $1012.83
Q1 2020	4,988	$4,539	$1035.04	$629.21 - $1168.21
Q4 2019	4,488	$5,006	$1090.77	$1054.00 - $1131.50
Q3 2019	4,066	$4,391	$1066.63	$1025.25 - $1104.14
Q2 2019	4,067	$4,154	$961.99	$906.22 - $1052.17
Q1 2019	4,097	$3,792	$905.92	$850.75 - $961.49
Q4 2018	4,534	$3,889	$891.29	$832.88 - $942.35
Q3 2018	4,440	$4,155	$926.90	$895.01 - $980.89
Q2 2018	4,699	$4,260	$880.88	$804.40 - $933.70
Q1 2018	5,439	$4,474	$825.48	$786.23 - $858.09
Q4 2017	5,753	$4,897	$874.10	$841.33 - $903.26
Q3 2017	5,974	$5,120	$859.82	$838.65 - $888.00
Q2 2017	5,913	$5,136	$867.55	$845.41 - $900.05
Q1 2017	6,106	$5,373	$895.74	$834.20 - $948.94
Q4 2016	6,001	$5,017	$838.09	$815.04 - $874.69
Q3 2016	5,741	$4,765	$824.01	$804.44 - $852.58
Q2 2016	5,653	$4,760	$815.85	$786.33 - $845.37
Q1 2016	5,903	$4,738	$748.05	$689.31 - $809.99
Q4 2015	5,822	$4,231	$765.83	$721.00 - $808.00
Q3 2015	5,654	$4,225	$719.51	$645.00 - $778.19
Q2 2015	5,499	$3,602	$663.32	$635.00 - $704.50
Q1 2015	4,274	$2,926	$659.70	$618.00 - $696.48
Q4 2014	4,224	$2,662	$635.98	$610.00 - $682.87
Q3 2014	4,157	$2,619	$624.10	$599.35 - $645.00
Q2 2014	4,132	$2,514	$595.51	$583.51 - $608.63
Q1 2014	4,171	$2,502	$583.55	$557.26 - $603.88
Q4 2013	4,284	$2,584	$589.37	$566.30 - $606.94
Q3 2013	4,689	$2,662	$580.72	$555.51 - $615.88
Q2 2013	4,713	$2,710	$583.58	$561.79 - $615.00