Mark James Byrne's Net Worth

$474 Million

Estimate Recalculated Feb 23, 2024 09:30PM EST

Who is Mark James Byrne?

Mark James Byrne has an estimated net worth of $474 Million. This is based on reported shares across multiple companies, which include Flagstone Reinsurance Holdings, S.A., and WHITE MOUNTAINS INSURANCE GROUP LTD.

SEC CIK

Mark James Byrne's CIK is 0001181361

Past Insider Trading and Trends

2009 was Mark James Byrne's most active year for acquiring shares with 5 total transactions. Mark James Byrne's most active month to acquire stocks was the month of November. 2010 was Mark James Byrne's most active year for disposing of shares, totalling 5 transactions. Mark James Byrne's most active month to dispose stocks was the month of November. 2007 saw Mark James Byrne paying a total of $675,000.00 for 50,000 shares, this is the most they've acquired in one year. In 2010 Mark James Byrne cashed out on 18,186,327 shares for a total of $129,415,864.97, their largest year based on trade value.

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Flagstone Reinsurance Holdings, S.A. No price found

Chairman

Form Type
Δ Own
Qty.
Price
Size ($)
Own
Filing Date
Type
Is Scheduled
Trade Dates
Form 4
-50.00%
-25.00K
$12.57
-$314,150.00
25K
Jan 19
Form 4
-100.00%
-8.01M
$11.48
-$91,916,087.08
0
Dec 8
Form 4
-7.34%
-225.75K
2.85M
Jun 28
Form 4
-27.95%
-2.00M
$12.00
-$24,000,000.00
5.16M
May 25
Form 4
+4.82%
131.12K
2.85M
Mar 22
Form 4
+0.93%
91.7K
$10.82
$992,094.35
9.93M
Dec 15 - Dec 21
Form 4
+0.26%
48.8K
19.15M
Sep 29 - Nov 12
Form 4
+0.51%
50K
$13.50
$675,000.00
9.79M
Mar 30
Form 3
0
0
No matching records found

WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) Snapshot price: $1618.89

Investor

Form Type
Δ Own
Qty.
Price
Size ($)
Own
Filing Date
Type
Is Scheduled
Trade Dates
Form 4
+0.23%
500
$424.80
$212,400.00
222.16K
Oct 16
No matching records found