Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported):   February 10, 2011

Alterra Capital Holdings Limited
(Exact name of registrant as specified in its charter)

Bermuda 000-33047 98-0584464
(State or other jurisdiction
(I.R.S. Employer
of incorporation) File Number) Identification No.)
Alterra House, 2 Front Street, Hamilton, Bermuda   HM 11
(Address of principal executive offices)
(Zip Code)
Registrant’s telephone number, including area code:   (441) 295-8800

Not Applicable
Former name or former address, if changed since last report


Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[  ]  Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
[  ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
[  ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
[  ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01 Other Events.

On February 10, 2011, as part of a previously announced board approved share repurchase program, the Registrant entered into a privately negotiated share purchase agreement with Moore Holdings, LLC and Moore Macro Fund, LP to acquire 2,273,050 of its common shares. The Registrant agreed to purchase the shares at $22.00 per share. The closing price of the Registrant's common shares on February 10, 2011 was $22.00. The closing is expected to occur on February 16, 2011.


Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

    Alterra Capital Holdings Limited
February 15, 2011   By:   Peter A. Minton
        Name: Peter A. Minton
        Title: Executive Vice President and Chief Operating Officer