WHITE MTNS INS GROUP LTD

Ticker: WTM CUSIP: G9618E107 Class: COM

THIRD AVENUE MANAGEMENT LLC's Holding History (CIK: 0001099281)

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

Q3 2018

Shares 28,649 Value ($000) $26,812 Avg Close $926.90 Range $895.01 - $980.89

Q2 2018

Shares 28,745 Value ($000) $26,061 Avg Close $880.88 Range $804.40 - $933.70

Q1 2018

Shares 34,195 Value ($000) $28,127 Avg Close $825.48 Range $786.23 - $858.09

Q4 2017

Shares 33,848 Value ($000) $28,815 Avg Close $874.10 Range $841.33 - $903.26

Q3 2017

Shares 32,601 Value ($000) $27,940 Avg Close $859.82 Range $838.65 - $888.00

Q2 2017

Shares 33,035 Value ($000) $28,696 Avg Close $867.55 Range $845.41 - $900.05

Q1 2017

Shares 64,386 Value ($000) $56,652 Avg Close $895.74 Range $834.20 - $948.94

Q4 2016

Shares 64,091 Value ($000) $53,583 Avg Close $838.09 Range $815.04 - $874.69

Q3 2016

Shares 66,101 Value ($000) $54,864 Avg Close $824.01 Range $804.44 - $852.58

Q2 2016

Shares 68,390 Value ($000) $57,584 Avg Close $815.85 Range $786.33 - $845.37

Q1 2016

Shares 72,359 Value ($000) $58,075 Avg Close $748.05 Range $689.31 - $809.99

Q4 2015

Shares 89,287 Value ($000) $64,895 Avg Close $765.83 Range $721.00 - $808.00

Q3 2015

Shares 109,906 Value ($000) $82,133 Avg Close $719.51 Range $645.00 - $778.19

Q2 2015

Shares 130,867 Value ($000) $85,710 Avg Close $663.32 Range $635.00 - $704.50

Q1 2015

Shares 149,970 Value ($000) $102,658 Avg Close $659.70 Range $618.00 - $696.48

Q4 2014

Shares 154,458 Value ($000) $97,326 Avg Close $635.98 Range $610.00 - $682.87

Q3 2014

Shares 182,014 Value ($000) $114,681 Avg Close $624.10 Range $599.35 - $645.00

Q2 2014

Shares 191,647 Value ($000) $116,605 Avg Close $595.51 Range $583.51 - $608.63

Q1 2014

Shares 191,574 Value ($000) $114,925 Avg Close $583.55 Range $557.26 - $603.88

Q4 2013

Shares 274,818 Value ($000) $165,737 Avg Close $589.37 Range $566.30 - $606.94

Q3 2013

Shares 270,824 Value ($000) $153,725 Avg Close $580.72 Range $555.51 - $615.88

Q2 2013

Shares 267,273 Value ($000) $153,666 Avg Close $583.58 Range $561.79 - $615.00

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	28,649	$26,812	$926.90	$895.01 - $980.89
Q2 2018	28,745	$26,061	$880.88	$804.40 - $933.70
Q1 2018	34,195	$28,127	$825.48	$786.23 - $858.09
Q4 2017	33,848	$28,815	$874.10	$841.33 - $903.26
Q3 2017	32,601	$27,940	$859.82	$838.65 - $888.00
Q2 2017	33,035	$28,696	$867.55	$845.41 - $900.05
Q1 2017	64,386	$56,652	$895.74	$834.20 - $948.94
Q4 2016	64,091	$53,583	$838.09	$815.04 - $874.69
Q3 2016	66,101	$54,864	$824.01	$804.44 - $852.58
Q2 2016	68,390	$57,584	$815.85	$786.33 - $845.37
Q1 2016	72,359	$58,075	$748.05	$689.31 - $809.99
Q4 2015	89,287	$64,895	$765.83	$721.00 - $808.00
Q3 2015	109,906	$82,133	$719.51	$645.00 - $778.19
Q2 2015	130,867	$85,710	$663.32	$635.00 - $704.50
Q1 2015	149,970	$102,658	$659.70	$618.00 - $696.48
Q4 2014	154,458	$97,326	$635.98	$610.00 - $682.87
Q3 2014	182,014	$114,681	$624.10	$599.35 - $645.00
Q2 2014	191,647	$116,605	$595.51	$583.51 - $608.63
Q1 2014	191,574	$114,925	$583.55	$557.26 - $603.88
Q4 2013	274,818	$165,737	$589.37	$566.30 - $606.94
Q3 2013	270,824	$153,725	$580.72	$555.51 - $615.88
Q2 2013	267,273	$153,666	$583.58	$561.79 - $615.00