WHITE MTNS INS GROUP LTD

Ticker: WTM CUSIP: G9618E107 Class: COM

STATE OF WISCONSIN INVESTMENT BOARD's Holding History (CIK: 0000854157)

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

Q4 2025

Shares 138 Value ($000) $287 Avg Close $1955.46 Range $1648.00 - $2143.25

Q3 2025

Shares 249 Value ($000) $416 Avg Close $1784.36 Range $1659.17 - $1880.11

Q2 2025

Shares 242 Value ($000) $435 Avg Close $1778.53 Range $1678.87 - $1937.23

Q1 2025

Shares 263 Value ($000) $506 Avg Close $1882.39 Range $1803.96 - $1993.86

Q4 2024

Shares 351 Value ($000) $683 Avg Close $1889.39 Range $1708.50 - $2023.00

Q3 2024

Shares 319 Value ($000) $541 Avg Close $1743.65 Range $1666.22 - $1847.78

Q2 2024

Shares 331 Value ($000) $602 Avg Close $1768.70 Range $1665.71 - $1899.21

Q1 2024

Shares 315 Value ($000) $565 Avg Close $1676.26 Range $1475.00 - $1849.99

Q4 2023

Shares 355 Value ($000) $534 Avg Close $1486.19 Range $1401.01 - $1562.63

Q3 2023

Shares 397 Value ($000) $594 Avg Close $1535.39 Range $1370.75 - $1617.00

Q2 2023

Shares 202 Value ($000) $281 Avg Close $1407.80 Range $1319.05 - $1540.09

Q1 2023

Shares 323 Value ($000) $445 Avg Close $1434.16 Range $1312.00 - $1560.21

Q4 2022

Shares 319 Value ($000) $451 Avg Close $1355.05 Range $1276.05 - $1435.45

Q3 2022

Shares 476 Value ($000) $620 Avg Close $1293.71 Range $1172.00 - $1393.48

Q2 2022

Shares 753 Value ($000) $938 Avg Close $1161.60 Range $1030.38 - $1291.50

Q1 2022

Shares 214 Value ($000) $243 Avg Close $1046.91 Range $982.60 - $1141.97

Q4 2021

Shares 359 Value ($000) $364 Avg Close $1056.38 Range $978.51 - $1137.50

Q3 2021

Shares 378 Value ($000) $404 Avg Close $1116.81 Range $1056.96 - $1179.20

Q2 2021

Shares 360 Value ($000) $413 Avg Close $1167.46 Range $1100.61 - $1243.00

Q1 2021

Shares 382 Value ($000) $426 Avg Close $1118.45 Range $994.91 - $1267.52

Q4 2020

Shares 387 Value ($000) $387 Avg Close $940.82 Range $778.11 - $1024.02

Q3 2020

Shares 387 Value ($000) $301 Avg Close $864.63 Range $752.10 - $961.96

Q2 2020

Shares 387 Value ($000) $344 Avg Close $901.27 Range $813.24 - $1012.83

Q1 2020

Shares 417 Value ($000) $379 Avg Close $1035.04 Range $629.21 - $1168.21

Q4 2019

Shares 437 Value ($000) $487 Avg Close $1090.77 Range $1054.00 - $1131.50

Q3 2019

Shares 437 Value ($000) $472 Avg Close $1066.63 Range $1025.25 - $1104.14

Q2 2019

Shares 441 Value ($000) $450 Avg Close $961.99 Range $906.22 - $1052.17

Q1 2019

Shares 578 Value ($000) $535 Avg Close $905.92 Range $850.75 - $961.49

Q4 2018

Shares 588 Value ($000) $504 Avg Close $891.29 Range $832.88 - $942.35

Q3 2018

Shares 598 Value ($000) $560 Avg Close $926.90 Range $895.01 - $980.89

Q2 2018

Shares 598 Value ($000) $542 Avg Close $880.88 Range $804.40 - $933.70

Q1 2018

Shares 714 Value ($000) $587 Avg Close $825.48 Range $786.23 - $858.09

Q4 2017

Shares 735 Value ($000) $626 Avg Close $874.10 Range $841.33 - $903.26

Q3 2017

Shares 885 Value ($000) $758 Avg Close $859.82 Range $838.65 - $888.00

Q2 2017

Shares 877 Value ($000) $762 Avg Close $867.55 Range $845.41 - $900.05

Q1 2017

Shares 877 Value ($000) $772 Avg Close $895.74 Range $834.20 - $948.94

Q4 2016

Shares 2,319 Value ($000) $1,939 Avg Close $838.09 Range $815.04 - $874.69

Q3 2016

Shares 3,060 Value ($000) $2,540 Avg Close $824.01 Range $804.44 - $852.58

Q2 2016

Shares 3,060 Value ($000) $2,577 Avg Close $815.85 Range $786.33 - $845.37

Q1 2016

Shares 4,060 Value ($000) $3,259 Avg Close $748.05 Range $689.31 - $809.99

Q4 2015

Shares 4,140 Value ($000) $3,009 Avg Close $765.83 Range $721.00 - $808.00

Q3 2015

Shares 4,550 Value ($000) $3,400 Avg Close $719.51 Range $645.00 - $778.19

Q2 2015

Shares 4,670 Value ($000) $3,059 Avg Close $663.32 Range $635.00 - $704.50

Q1 2015

Shares 4,690 Value ($000) $3,210 Avg Close $659.70 Range $618.00 - $696.48

Q4 2014

Shares 4,820 Value ($000) $3,037 Avg Close $635.98 Range $610.00 - $682.87

Q3 2014

Shares 4,570 Value ($000) $2,879 Avg Close $624.10 Range $599.35 - $645.00

Q2 2014

Shares 4,530 Value ($000) $2,756 Avg Close $595.51 Range $583.51 - $608.63

Q1 2014

Shares 4,440 Value ($000) $2,664 Avg Close $583.55 Range $557.26 - $603.88

Q4 2013

Shares 4,500 Value ($000) $2,714 Avg Close $589.37 Range $566.30 - $606.94

Q3 2013

Shares 4,550 Value ($000) $2,583 Avg Close $580.72 Range $555.51 - $615.88

Q2 2013

Shares 4,900 Value ($000) $2,817 Avg Close $583.58 Range $561.79 - $615.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	138	$287	$1955.46	$1648.00 - $2143.25
Q3 2025	249	$416	$1784.36	$1659.17 - $1880.11
Q2 2025	242	$435	$1778.53	$1678.87 - $1937.23
Q1 2025	263	$506	$1882.39	$1803.96 - $1993.86
Q4 2024	351	$683	$1889.39	$1708.50 - $2023.00
Q3 2024	319	$541	$1743.65	$1666.22 - $1847.78
Q2 2024	331	$602	$1768.70	$1665.71 - $1899.21
Q1 2024	315	$565	$1676.26	$1475.00 - $1849.99
Q4 2023	355	$534	$1486.19	$1401.01 - $1562.63
Q3 2023	397	$594	$1535.39	$1370.75 - $1617.00
Q2 2023	202	$281	$1407.80	$1319.05 - $1540.09
Q1 2023	323	$445	$1434.16	$1312.00 - $1560.21
Q4 2022	319	$451	$1355.05	$1276.05 - $1435.45
Q3 2022	476	$620	$1293.71	$1172.00 - $1393.48
Q2 2022	753	$938	$1161.60	$1030.38 - $1291.50
Q1 2022	214	$243	$1046.91	$982.60 - $1141.97
Q4 2021	359	$364	$1056.38	$978.51 - $1137.50
Q3 2021	378	$404	$1116.81	$1056.96 - $1179.20
Q2 2021	360	$413	$1167.46	$1100.61 - $1243.00
Q1 2021	382	$426	$1118.45	$994.91 - $1267.52
Q4 2020	387	$387	$940.82	$778.11 - $1024.02
Q3 2020	387	$301	$864.63	$752.10 - $961.96
Q2 2020	387	$344	$901.27	$813.24 - $1012.83
Q1 2020	417	$379	$1035.04	$629.21 - $1168.21
Q4 2019	437	$487	$1090.77	$1054.00 - $1131.50
Q3 2019	437	$472	$1066.63	$1025.25 - $1104.14
Q2 2019	441	$450	$961.99	$906.22 - $1052.17
Q1 2019	578	$535	$905.92	$850.75 - $961.49
Q4 2018	588	$504	$891.29	$832.88 - $942.35
Q3 2018	598	$560	$926.90	$895.01 - $980.89
Q2 2018	598	$542	$880.88	$804.40 - $933.70
Q1 2018	714	$587	$825.48	$786.23 - $858.09
Q4 2017	735	$626	$874.10	$841.33 - $903.26
Q3 2017	885	$758	$859.82	$838.65 - $888.00
Q2 2017	877	$762	$867.55	$845.41 - $900.05
Q1 2017	877	$772	$895.74	$834.20 - $948.94
Q4 2016	2,319	$1,939	$838.09	$815.04 - $874.69
Q3 2016	3,060	$2,540	$824.01	$804.44 - $852.58
Q2 2016	3,060	$2,577	$815.85	$786.33 - $845.37
Q1 2016	4,060	$3,259	$748.05	$689.31 - $809.99
Q4 2015	4,140	$3,009	$765.83	$721.00 - $808.00
Q3 2015	4,550	$3,400	$719.51	$645.00 - $778.19
Q2 2015	4,670	$3,059	$663.32	$635.00 - $704.50
Q1 2015	4,690	$3,210	$659.70	$618.00 - $696.48
Q4 2014	4,820	$3,037	$635.98	$610.00 - $682.87
Q3 2014	4,570	$2,879	$624.10	$599.35 - $645.00
Q2 2014	4,530	$2,756	$595.51	$583.51 - $608.63
Q1 2014	4,440	$2,664	$583.55	$557.26 - $603.88
Q4 2013	4,500	$2,714	$589.37	$566.30 - $606.94
Q3 2013	4,550	$2,583	$580.72	$555.51 - $615.88
Q2 2013	4,900	$2,817	$583.58	$561.79 - $615.00