WHITE MTNS INS GROUP LTD

Ticker: WTM CUSIP: G9618E107 Class: COM

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q4 2025

Shares 15,928 Value ($000) $33,099 Avg Close $1955.46 Range $1648.00 - $2143.25

Q3 2025

Shares 19,211 Value ($000) $32,112 Avg Close $1784.36 Range $1659.17 - $1880.11

Q2 2025

Shares 24,651 Value ($000) $44,266 Avg Close $1778.53 Range $1678.87 - $1937.23

Q1 2025

Shares 25,438 Value ($000) $48,989 Avg Close $1882.39 Range $1803.96 - $1993.86

Q4 2024

Shares 49,926 Value ($000) $97,109 Avg Close $1889.39 Range $1708.50 - $2023.00

Q3 2024

Shares 60,675 Value ($000) $102,917 Avg Close $1743.65 Range $1666.22 - $1847.78

Q2 2024

Shares 69,789 Value ($000) $126,838 Avg Close $1768.70 Range $1665.71 - $1899.21

Q1 2024

Shares 61,006 Value ($000) $109,463 Avg Close $1676.26 Range $1475.00 - $1849.99

Q4 2023

Shares 67,381 Value ($000) $101,409 Avg Close $1486.19 Range $1401.01 - $1562.63

Q3 2023

Shares 70,821 Value ($000) $105,926 Avg Close $1535.39 Range $1370.75 - $1617.00

Q2 2023

Shares 79,635 Value ($000) $110,606 Avg Close $1407.80 Range $1319.05 - $1540.09

Q1 2023

Shares 70,724 Value ($000) $97,422 Avg Close $1434.16 Range $1312.00 - $1560.21

Q4 2022

Shares 83,374 Value ($000) $117,918 Avg Close $1355.05 Range $1276.05 - $1435.45

Q3 2022

Shares 90,010 Value ($000) $117,285 Avg Close $1293.71 Range $1172.00 - $1393.48

Q2 2022

Shares 186,098 Value ($000) $231,902 Avg Close $1161.60 Range $1030.38 - $1291.50

Q1 2022

Shares 213,022 Value ($000) $242,044 Avg Close $1046.91 Range $982.60 - $1141.97

Q4 2021

Shares 221,559 Value ($000) $224,639 Avg Close $1056.38 Range $978.51 - $1137.50

Q3 2021

Shares 223,860 Value ($000) $239,443 Avg Close $1116.81 Range $1056.96 - $1179.20

Q2 2021

Shares 236,668 Value ($000) $271,701 Avg Close $1167.46 Range $1100.61 - $1243.00

Q1 2021

Shares 235,965 Value ($000) $263,078 Avg Close $1118.45 Range $994.91 - $1267.52

Q4 2020

Shares 250,720 Value ($000) $250,886 Avg Close $940.82 Range $778.11 - $1024.02

Q3 2020

Shares 240,853 Value ($000) $187,625 Avg Close $864.63 Range $752.10 - $961.96

Q2 2020

Shares 253,010 Value ($000) $224,664 Avg Close $901.27 Range $813.24 - $1012.83

Q1 2020

Shares 243,906 Value ($000) $221,954 Avg Close $1035.04 Range $629.21 - $1168.21

Q4 2019

Shares 247,882 Value ($000) $276,515 Avg Close $1090.77 Range $1054.00 - $1131.50

Q3 2019

Shares 249,984 Value ($000) $269,983 Avg Close $1066.63 Range $1025.25 - $1104.14

Q2 2019

Shares 262,276 Value ($000) $267,905 Avg Close $961.99 Range $906.22 - $1052.17

Q1 2019

Shares 249,606 Value ($000) $231,004 Avg Close $905.92 Range $850.75 - $961.49

Q4 2018

Shares 224,255 Value ($000) $192,342 Avg Close $891.29 Range $832.88 - $942.35

Q3 2018

Shares 225,220 Value ($000) $210,776 Avg Close $926.90 Range $895.01 - $980.89

Q2 2018

Shares 220,189 Value ($000) $199,626 Avg Close $880.88 Range $804.40 - $933.70

Q1 2018

Shares 186,536 Value ($000) $153,429 Avg Close $825.48 Range $786.23 - $858.09

Q4 2017

Shares 177,348 Value ($000) $150,973 Avg Close $874.10 Range $841.33 - $903.26

Q3 2017

Shares 158,520 Value ($000) $135,852 Avg Close $859.82 Range $838.65 - $888.00

Q2 2017

Shares 148,209 Value ($000) $128,739 Avg Close $867.55 Range $845.41 - $900.05

Q1 2017

Shares 138,825 Value ($000) $122,149 Avg Close $895.74 Range $834.20 - $948.94

Q4 2016

Shares 138,168 Value ($000) $115,514 Avg Close $838.09 Range $815.04 - $874.69

Q3 2016

Shares 149,476 Value ($000) $124,066 Avg Close $824.01 Range $804.44 - $852.58

Q2 2016

Shares 141,091 Value ($000) $118,798 Avg Close $815.85 Range $786.33 - $845.37

Q1 2016

Shares 141,642 Value ($000) $113,682 Avg Close $748.05 Range $689.31 - $809.99

Q4 2015

Shares 141,620 Value ($000) $102,931 Avg Close $765.83 Range $721.00 - $808.00

Q3 2015

Shares 156,967 Value ($000) $117,302 Avg Close $719.51 Range $645.00 - $778.19

Q2 2015

Shares 158,402 Value ($000) $103,744 Avg Close $663.32 Range $635.00 - $704.50

Q1 2015

Shares 165,731 Value ($000) $113,447 Avg Close $659.70 Range $618.00 - $696.48

Q4 2014

Shares 164,185 Value ($000) $103,455 Avg Close $635.98 Range $610.00 - $682.87

Q3 2014

Shares 164,715 Value ($000) $103,783 Avg Close $624.10 Range $599.35 - $645.00

Q2 2014

Shares 166,400 Value ($000) $101,245 Avg Close $595.51 Range $583.51 - $608.63

Q1 2014

Shares 94,827 Value ($000) $56,887 Avg Close $583.55 Range $557.26 - $603.88

Q4 2013

Shares 18,302 Value ($000) $11,038 Avg Close $589.37 Range $566.30 - $606.94

Q3 2013

Shares 18,642 Value ($000) $10,582 Avg Close $580.72 Range $555.51 - $615.88

Q2 2013

Shares 13,145 Value ($000) $7,558 Avg Close $583.58 Range $561.79 - $615.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	15,928	$33,099	$1955.46	$1648.00 - $2143.25
Q3 2025	19,211	$32,112	$1784.36	$1659.17 - $1880.11
Q2 2025	24,651	$44,266	$1778.53	$1678.87 - $1937.23
Q1 2025	25,438	$48,989	$1882.39	$1803.96 - $1993.86
Q4 2024	49,926	$97,109	$1889.39	$1708.50 - $2023.00
Q3 2024	60,675	$102,917	$1743.65	$1666.22 - $1847.78
Q2 2024	69,789	$126,838	$1768.70	$1665.71 - $1899.21
Q1 2024	61,006	$109,463	$1676.26	$1475.00 - $1849.99
Q4 2023	67,381	$101,409	$1486.19	$1401.01 - $1562.63
Q3 2023	70,821	$105,926	$1535.39	$1370.75 - $1617.00
Q2 2023	79,635	$110,606	$1407.80	$1319.05 - $1540.09
Q1 2023	70,724	$97,422	$1434.16	$1312.00 - $1560.21
Q4 2022	83,374	$117,918	$1355.05	$1276.05 - $1435.45
Q3 2022	90,010	$117,285	$1293.71	$1172.00 - $1393.48
Q2 2022	186,098	$231,902	$1161.60	$1030.38 - $1291.50
Q1 2022	213,022	$242,044	$1046.91	$982.60 - $1141.97
Q4 2021	221,559	$224,639	$1056.38	$978.51 - $1137.50
Q3 2021	223,860	$239,443	$1116.81	$1056.96 - $1179.20
Q2 2021	236,668	$271,701	$1167.46	$1100.61 - $1243.00
Q1 2021	235,965	$263,078	$1118.45	$994.91 - $1267.52
Q4 2020	250,720	$250,886	$940.82	$778.11 - $1024.02
Q3 2020	240,853	$187,625	$864.63	$752.10 - $961.96
Q2 2020	253,010	$224,664	$901.27	$813.24 - $1012.83
Q1 2020	243,906	$221,954	$1035.04	$629.21 - $1168.21
Q4 2019	247,882	$276,515	$1090.77	$1054.00 - $1131.50
Q3 2019	249,984	$269,983	$1066.63	$1025.25 - $1104.14
Q2 2019	262,276	$267,905	$961.99	$906.22 - $1052.17
Q1 2019	249,606	$231,004	$905.92	$850.75 - $961.49
Q4 2018	224,255	$192,342	$891.29	$832.88 - $942.35
Q3 2018	225,220	$210,776	$926.90	$895.01 - $980.89
Q2 2018	220,189	$199,626	$880.88	$804.40 - $933.70
Q1 2018	186,536	$153,429	$825.48	$786.23 - $858.09
Q4 2017	177,348	$150,973	$874.10	$841.33 - $903.26
Q3 2017	158,520	$135,852	$859.82	$838.65 - $888.00
Q2 2017	148,209	$128,739	$867.55	$845.41 - $900.05
Q1 2017	138,825	$122,149	$895.74	$834.20 - $948.94
Q4 2016	138,168	$115,514	$838.09	$815.04 - $874.69
Q3 2016	149,476	$124,066	$824.01	$804.44 - $852.58
Q2 2016	141,091	$118,798	$815.85	$786.33 - $845.37
Q1 2016	141,642	$113,682	$748.05	$689.31 - $809.99
Q4 2015	141,620	$102,931	$765.83	$721.00 - $808.00
Q3 2015	156,967	$117,302	$719.51	$645.00 - $778.19
Q2 2015	158,402	$103,744	$663.32	$635.00 - $704.50
Q1 2015	165,731	$113,447	$659.70	$618.00 - $696.48
Q4 2014	164,185	$103,455	$635.98	$610.00 - $682.87
Q3 2014	164,715	$103,783	$624.10	$599.35 - $645.00
Q2 2014	166,400	$101,245	$595.51	$583.51 - $608.63
Q1 2014	94,827	$56,887	$583.55	$557.26 - $603.88
Q4 2013	18,302	$11,038	$589.37	$566.30 - $606.94
Q3 2013	18,642	$10,582	$580.72	$555.51 - $615.88
Q2 2013	13,145	$7,558	$583.58	$561.79 - $615.00