ALTERRA CAPITAL HOLDINGS Ltd (ALTE) [Rocket]

Ownership

ALTERRA CAPITAL HOLDINGS Ltd (ALTE)

Portfolio as of:

Name	Shares	Change	Value	% Port	% OS	Hist	Date
MOORE HOLDINGS LLC	10,562,065	-1,190,142	245,990,494			Hist	04/14/2010
FMR LLC	4,356,658	-60,100	100,160,000	0.02		Hist	03/31/2010
ROYCE & ASSOCIATES LP	2,647,204	97,001	60,859,000	0.21		Hist	03/31/2010
LORD, ABBETT & CO. LLC	2,382,480	118,090	54,773,215	0.12		Hist	03/31/2010
MOORE CAPITAL MANAGEMENT, LP	2,333,334	0	53,643,000	2.09		Hist	03/31/2010
MORGAN STANLEY	1,818,445	50,643	41,805,000	0.02		Hist	03/31/2010
VANGUARD GROUP INC	1,713,719	34,721	39,398,000	0.01		Hist	03/31/2010
Boston Partners	1,466,787	21,908	33,721,000	0.22		Hist	03/31/2010
River Road Asset Management, LLC	1,427,155	157,860	32,810,000	0.90		Hist	03/31/2010
THOMPSON SIEGEL & WALMSLEY LLC	1,287,195	-17,288	29,592,000	0.44		Hist	03/31/2010
STATE STREET CORP	1,201,867	217,653	26,802,000	0.01		Hist	12/31/2009
GOLDMAN SACHS GROUP INC	1,153,770	12,897	26,525,170	0.01		Hist	03/31/2010
DIMENSIONAL FUND ADVISORS LP	1,095,868	318,763	25,194,000	0.04		Hist	03/31/2010
TRAVELERS COMPANIES, INC.	1,058,833	0	24,343,000	11.77		Hist	03/31/2010
ARTISAN PARTNERS HOLDINGS LP	1,020,700	-2,800	23,466,000	0.09		Hist	03/31/2010
BlackRock Fund Advisors	1,009,128	-10,898	23,200,000	0.01		Hist	03/31/2010
ROTHSCHILD & CO ASSET MANAGEMENT US INC.	822,814	-24,710	17,584,000	0.41		Hist	09/30/2009
TimesSquare Capital Management, LLC	578,500	-895,000	13,300,000	0.11		Hist	03/31/2010
Aston Asset Management, LLC	488,656	55,160	11,234,000	0.16		Hist	03/31/2010
AQR CAPITAL MANAGEMENT LLC	478,711	43,806	11,006,000	0.12		Hist	03/31/2010
AXA S.A.	458,614	300,562	10,543,540	0.01		Hist	03/31/2010
GRACE & WHITE INC /NY	414,120	-12,800	9,521,000	2.25		Hist	03/31/2010
PROSPECTOR PARTNERS LLC	395,104	-178,996	9,084,000	0.49		Hist	03/31/2010
PRINCIPAL FINANCIAL GROUP INC	375,100	164,471	8,624,000	0.03		Hist	03/31/2010
EDGE ASSET MANAGEMENT, INC	355,599	3,400	7,599,000	0.18		Hist	09/30/2009
MACQUARIE INVESTMENT MANAGEMENT BUSINESS TRUST	322,390	-33,508	7,412,000	0.00		Hist	03/31/2010
ADAGE CAPITAL PARTNERS GP, L.L.C.	318,381	0	7,320,000	0.03		Hist	03/31/2010
Brandywine Global Investment Management, LLC	314,450	-41,700	7,230,000	0.09		Hist	03/31/2010
KEYBANK NATIONAL ASSOCIATION/OH	252,616	-24,450	5,634,000	0.00		Hist	12/31/2009
AMERICAN CENTURY COMPANIES INC	230,401	3,101	5,297,000	0.00		Hist	03/31/2010
AJO, LP	222,300	209,600	5,111,000	0.03		Hist	03/31/2010
KEANE CAPITAL MANAGEMENT INC	222,388	98,594	4,960,000	1.31		Hist	12/31/2009
STRS OHIO	214,400	26,400	4,929,000	0.02		Hist	03/31/2010
Invesco Ltd.	189,924	76,824	4,367,000	0.00		Hist	03/31/2010
BlackRock Investment Management, LLC	180,616	47,324	4,152,000	0.01		Hist	03/31/2010
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