Dark

WTM
White Mountains Insurance Group Ltd.
stock NYSE

At Close

Apr 13, 2026 3:59:55 PM EDT

2295.20USD-0.258%(-5.94)15,257

0.00Bid 0.00Ask 0.00Spread

Pre-market

0.00USD-100.000%(-2301.14)0

After-hours

Apr 13, 2026 4:32:30 PM EDT

2297.10USD+0.083%(+1.90)75

OverviewHistoricalExchange VolumeShortsMore

WTM Volume Apr 13, 2026

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	42.39	6,463	37.66
NYSE	19.51	2,975	29.46
IEX	11.76	1,793	7.83
Nasdaq GSM	9.74	1,485	7.78
Cboe EDGX	4.41	672	3.41
Cboe BZX	4.39	669	3.93
NYSE Arca	2.45	374	4.48
Cboe BYX	1.46	223	1.30
Nasdaq BX	1.22	186	0.59
MEMX	1.15	175	2.26
NYSE National	0.98	149	0.48
Cboe EDGA	0.18	28	0.19
Nasdaq PHLX	0.12	19	0.08
MIAX Pearl	0.11	17	0.27
CHX	0.07	11	0.10
NYSE American	0.05	8	0.21
LTSE	0.00	0	0.00

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¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

WTM Nutrition Facts

0.78 servings per container

Serving size

19.57K

Calories

15.25K

% Day

% Avg

Off Exchange¹ 6K

42.39%

37.66%

NYSE 3K

19.51%

29.46%

IEX 2K

11.76%

7.83%

Nasdaq GSM 1K

9.74%

7.78%

Cboe EDGX 672

4.41%

3.41%

Cboe BZX 669

4.39%

3.93%

NYSE Arca 374

2.45%

4.48%

Cboe BYX 223

1.46%

1.30%

Nasdaq BX 186

1.22%

0.59%

MEMX 175

1.15%

2.26%

NYSE National 149

0.98%

0.48%

Cboe EDGA 28

0.18%

0.19%

Nasdaq PHLX 19

0.12%

0.08%

MIAX Pearl 17

0.11%

0.27%

CHX 11

0.07%

0.10%

NYSE American 8

0.05%

0.21%

LTSE 0

0.00%

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

chartexchange.com

WTM Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 6,463, which is 42.39% of today's total volume.
Today's Lit volume is 8,784, which is 57.61%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 37.66%.
The average Lit volume has been 62.34%.

WTM Volume by Exchange

Off Exchange

NYSE

IEX

Nasdaq GSM

Cboe EDGX

Cboe BZX

NYSE Arca

Cboe BYX

Nasdaq BX

MEMX

NYSE National