8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C.  20549

FORM 8-K

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

November 5, 2015

Date of Report (Date of earliest event reported)

Arch Capital Group Ltd.

(Exact name of registrant as specified in its charter)

Bermuda	0-26456	N/A
(State or other jurisdiction of incorporation or organization)	(Commission File Number)	(I.R.S. Employer Identification No.)

Waterloo House, 100 Pitts Bay Road, Pembroke HM 08, Bermuda

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code:(441) 278-9250

N/A

(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 (see General Instruction A.2. below):

[ ]    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))

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ITEM 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On November 11, 2015, Arch Capital Group Ltd. (“ACGL” and, together with its subsidiaries, the “Company”) announced that Marc Grandisson has been promoted to the position of President and Chief Operating Officer, effective January 1, 2016. Mr. Grandisson joined the Company in 2001 and currently serves as Chairman and Chief Executive Officer of Arch Worldwide Reinsurance and Mortgage Groups. In his new role, Mr. Grandisson will continue to report to Dinos Iordanou, who will cease to serve as President effective January 1, 2016, but will remain Chairman and Chief Executive Officer of ACGL. Mr. Grandisson will have responsibility for all of the Company’s operating units, insurance, reinsurance and mortgage. All other corporate functions, finance, investments and legal, will continue to report to Mr. Iordanou.

The information required by Items 4.01(b), (d) and (e), and Item 4.04(a), of Regulation S-K is hereby incorporated by reference to ACGL’s proxy statement for its 2015 annual general meeting of shareholders, dated March 26, 2015.

ITEM 7.01 Regulation FD Disclosure.

ACGL issued a press release announcing the matters described in Item 5.02 above. A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference. The information set forth in Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

ITEM 9.01    Exhibits.

EXHIBIT NO.	DESCRIPTION
99.1	Press Release dated November 11, 2015 announcing the matters described in Item 5.02

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SIGNATURES

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

	ARCH CAPITAL GROUP LTD.
Date: November 11, 2015	By: /s/ Mark D. Lyons Name: Mark D. Lyons Title: EVP & CFO

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EXHIBIT INDEX

EXHIBIT NO.	DESCRIPTION
99.1	Press Release dated November 11, 2015 announcing the matters described in Item 5.02

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EX-99.1

EXHIBIT 99.1

ARCH CAPITAL GROUP LTD. NAMES

MARC GRANDISSON

PRESIDENT AND CHIEF OPERATING OFFICER

HAMILTON, BERMUDA, November 11, 2015 – Arch Capital Group Ltd. [NASDAQ: ACGL] today announced that Marc Grandisson will be promoted to the position of President and Chief Operating Officer, effective January 1, 2016. Mr. Grandisson joined the Company in 2001 and currently serves as Chairman and Chief Executive Officer of Arch Worldwide Reinsurance and Mortgage Groups. In his new role, Mr. Grandisson will continue to report to Dinos Iordanou, Chairman of the Board and Chief Executive Officer of ACGL, and will have responsibility for all of the Company’s operating units, insurance, reinsurance and mortgage. All other corporate functions, finance, investments and legal, will continue to report to Mr. Iordanou.

Mr. Iordanou commented, “The Board of Directors and I would like to congratulate Marc on his new role. He has done an outstanding job for us since joining the Company over 14 years ago, and his promotion is well deserved. With Marc’s guidance, our reinsurance and mortgage businesses have become significant participants in the marketplace, and he is an important member of our senior leadership team. Promoting from within the Company is confirmation of Arch’s commitment to our people, the importance we place on our unique culture, and the strength and depth of the management team we have built at Arch.”

Mr. Grandisson said, “I am excited and honored to take on this new role. I look forward to continuing to work closely with Dinos, our strong senior management team and the talented staff across our entire organization to continue to develop and expand our business and execute our long-term strategic plan. With Dave McElroy, Nicolas Papadopoulo and Andrew Rippert overseeing our insurance, reinsurance and mortgage operations, respectively, we have an extremely deep management team and I am very pleased that they will lead our business into the future.”

Mr. Grandisson, age 48, currently serves as Chairman and Chief Executive Officer of Arch Worldwide Reinsurance and Mortgage Groups and has been a member of the Company's Executive Strategy Committee. Prior to that, he served in various leadership roles at Arch Reinsurance Ltd., including as President and Chief Executive Officer. Before joining the Company, Mr. Grandisson held various senior positions at Berkshire Hathaway and F&G Re. Mr. Grandisson holds an M.B.A. from The Wharton School of the University of Pennsylvania,

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and is also a Fellow of the Casualty Actuarial Society and a Member of the American Academy of Actuaries.

Arch Capital Group Ltd., a Bermuda-based company with approximately $7.05 billion in capital at September 30, 2015, provides insurance and reinsurance on a worldwide basis through its wholly owned subsidiaries.

Cautionary Note Regarding Forward-Looking Statements

The Private Securities Litigation Reform Act of 1995 provides a "safe harbor" for forward−looking statements. This release or any other written or oral statements made by or on behalf of Arch Capital Group Ltd. and its subsidiaries may include forward−looking statements, which reflect our current views with respect to future events and financial performance. All statements other than statements of historical fact included in or incorporated by reference in this release are forward−looking statements.

Forward−looking statements can generally be identified by the use of forward−looking terminology such as "may," "will," "expect," "intend," "estimate," "anticipate," "believe" or "continue" or their negative or variations or similar terminology. Forward−looking statements involve our current assessment of risks and uncertainties. Actual events and results may differ materially from those expressed or implied in these statements. A non-exclusive list of the important factors that could cause actual results to differ materially from those in such forward-looking statements includes the following: adversegeneral economic and market conditions;increased competition;pricing and policy term trends;fluctuations in the actions of rating agencies and ourability to maintain and improve our ratings; investment performance;the loss of key personnel;the adequacy of our loss reserves,severity and/or frequency of losses, greater than expected loss ratios and adverse development on claim and/or claim expense liabilities;greater frequency or severity of unpredictable natural and man-made catastrophic events; the impact of acts of terrorism and acts of war; changes in regulations and/or tax laws in the United States or elsewhere;our ability to successfully integrate, establish and maintain operating procedures as well as integrate the businesses we have acquired or may acquire into the existing operations;changes in accounting principles or policies;material differences between actual and expected assessments for guaranty funds and mandatory pooling arrangements;availability and cost to us of reinsurance to manage our gross and net

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exposures;the failure of others to meet their obligations to us; andother factors identified in our filings with the U.S. Securities and Exchange Commission.

The foregoing review of important factors should not be construed as exhaustive and should be read in conjunction with other cautionary statements that are included herein or elsewhere. All subsequent written and oral forward−looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these cautionary statements. We undertake no obligation to publicly update or revise any forward−looking statement, whether as a result of new information, future events or otherwise.

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Contact:Arch Capital Group Ltd.

Mark D. Lyons    (441) 278-9250

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