WHITE MTNS INS GROUP LTD

Ticker: WTM CUSIP: G9618E107 Class: COM

PDT Partners, LLC's Holding History (CIK: 0001564702)

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

Q3 2015

Shares 3,699 Value ($000) $2,764 Avg Close $719.51 Range $645.00 - $778.19

Q1 2015

Shares 2,100 Value ($000) $1,437 Avg Close $659.70 Range $618.00 - $696.48

Q4 2014

Shares 2,248 Value ($000) $1,416 Avg Close $635.98 Range $610.00 - $682.87

Q3 2014

Shares 648 Value ($000) $408 Avg Close $624.10 Range $599.35 - $645.00

Q1 2014

Shares 6,924 Value ($000) $4,154 Avg Close $583.55 Range $557.26 - $603.88

Q4 2013

Shares 524 Value ($000) $316 Avg Close $589.37 Range $566.30 - $606.94

Q3 2013

Shares 1,500 Value ($000) $851 Avg Close $580.72 Range $555.51 - $615.88

Q2 2013

Shares 871 Value ($000) $501 Avg Close $583.58 Range $561.79 - $615.00

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2015	3,699	$2,764	$719.51	$645.00 - $778.19
Q1 2015	2,100	$1,437	$659.70	$618.00 - $696.48
Q4 2014	2,248	$1,416	$635.98	$610.00 - $682.87
Q3 2014	648	$408	$624.10	$599.35 - $645.00
Q1 2014	6,924	$4,154	$583.55	$557.26 - $603.88
Q4 2013	524	$316	$589.37	$566.30 - $606.94
Q3 2013	1,500	$851	$580.72	$555.51 - $615.88
Q2 2013	871	$501	$583.58	$561.79 - $615.00