Ownership Submission
FORM 5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Form 3 Holdings Reported
Form 4 Transactions Reported
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person *
IORDANOU CONSTANTINE
 2. Issuer Name and Ticker or Trading Symbol
ARCH CAPITAL GROUP LTD. [ACGL] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chairman, President & CEO
(Last)
(First)
(Middle)

WATERLOO HOUSE, GROUND FLOOR, 100 PITTS BAY ROAD		 3. Statement for Issuer's Fiscal Year Ended (Month/Day/Year)
12/31/2012
(Street)


PEMBROKE, D0 HM 08		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Reporting
(check applicable line)

_X_ Form Filed by One Reporting Person
___ Form Filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned at end of Issuer's Fiscal Year
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Amount (A) or (D) Price
Common Shares, $.0033 par value per share 11/23/2012   G5 276,171 (1) D $ 0 0 I By 2005 GRAT (1)
Common Shares, $.0033 par value per share             440,555 (3) D  
Common Shares, $.0033 par value per share             83,333 (3) I By Limited Liability Company
Common Shares, $.0033 par value per share             116,613 (3) I By Limited Liability Company
Common Shares, $.0033 par value per share             11,616 (3) I By child
Series C Non-Cumulative Preferred Shares (non-convertible)             6,000 (3) D  
Series C Non-Cumulative Preferred Shares (non-convertible)             1,800 (3) I By spouse

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 2270 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned at End of Issuer's Fiscal Year
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
(A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy) $ 13 11/23/2012   G(1)   360,000 (1)   (2) 09/22/2014 Common Shares, $.0033 par value per share
360,000
$ 0 0
I
By 2005 GRAT (1)

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
IORDANOU CONSTANTINE
WATERLOO HOUSE, GROUND FLOOR
100 PITTS BAY ROAD
PEMBROKE, D0 HM 08		   X     Chairman, President & CEO  

Signatures

/s/ Constantine Iordanou 11/18/2013
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) On November 23, 2012, the 2005 GRAT expired. Per the terms of the GRAT, the trust property, including 276,171 common shares and 360,000 stock options, was equally distributed to trusts for the benefit of the reporting person's three daughters for which the reporting person is not a trustee.
(2) The stock option became exercisable in three equal annual installments, commencing on September 22, 2004, subject to the terms of the agreement.
(3) Number of shares is as of November 18, 2013.

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