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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
947484	Arch Capital Group Ltd.	ACGL	Fire, Marine & Casualty Insurance (6331)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1227102	Constantine Iordanou	Wessex House, 5Th Floor 45 Reid Street Hamilton D0 HM 12	Chairman, President & Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Shares, $.0033 Par Value Per Share	Disposition	2012-11-21	14,000	$0.00	250,000	No	5	J	Indirect	By Limited Liability Company
Common Shares, $.0033 Par Value Per Share	Disposition	2012-12-03	100,468	$44.66	535,594	No	4	S	Direct
Common Shares, $.0033 Par Value Per Share	Disposition	2012-12-03	500	$45.13	535,094	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	5	J	Indirect	By Limited Liability Company
No	4	S	Direct
No	4	S	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Shares, $.0033 Par Value Per Share	636,062	Direct
Common Shares, $.0033 Par Value Per Share	379,314	Indirect	By 2005 GRAT
Common Shares, $.0033 Par Value Per Share	116,613	Indirect	By Limited Liability Company
Common Shares, $.0033 Par Value Per Share	11,616	Indirect	By child

Footnotes

The common shares were distributed from Protaras LLC, a limited liability company ("Protaras LLC") to the reporting person. The reporting person owns all of the membership interests in Protaras LLC and serves as its sole managing member. The distribution resulted in the common shares being changed from indirect ownership by the reporting person to direct ownership by the reporting person. See FN2.
On November 21, 2012, 14,000 common shares were distributed from Protaras LLC to the reporting person. The distribution resulted in the common shares being changed from indirect ownership by the reporting person to direct ownership by the reporting person. See FN1.
Represents a weighted average sales price; the sales prices range from $44.52 to $44.87. Upon request, the full sale information regarding the number of shares sold at each price increment will be provided to the Commission or to a security hoder of the issuer.
Represents a weighted average sales price; the sales prices range from 45.125 to $45.13. Upon request, the full sale information regarding the number of shares sold at each price increment will be provided to the Commission or to a security hoder of the issuer.
The shares were sold in order to satisfy state and federal income tax obligations.