Sec Form 4 Filing - GRANDISSON MARC @ ARCH CAPITAL GROUP LTD. - 2016-02-18

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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 GRANDISSON MARC 2. Issuer Name and Ticker or Trading Symbol ARCH CAPITAL GROUP LTD. [ ACGL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President & COO (Last) (First) (Middle) C/O ARCH CAPITAL GROUP LTD., WATERLOO HOUSE, 100 PITTS BAY ROAD 3. Date of Earliest Transaction (MM/DD/YY) 02/18/2016 (Street) PEMBROKE, D0HM 08 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares, $.0033 par value per share 02/18/2016 M 211 A $ 18.7567 552,362 D Common Shares, $.0033 par value per share 02/18/2016 S 211 D $ 68.5 552,151 D Common Shares $.0033 par value per share 02/19/2016 M 29,789 A $ 18.7567 581,940 D Common Shares, $.0033 par value per share 02/19/2016 S 29,789 D $ 68.6241 ( 1 ) 552,151 D Common Shares, $.0033 par value per share 02/19/2016 M( 3 ) 30,000 A $ 18.7567 582,151 D Common Shares, $.0033 par value per share 02/19/2016 F( 3 ) 8,199 D $ 68.63 573,952 D Common Shares, $.0033 par value per share 660 I By spouse

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option (right to buy) $ 18.7567 02/18/2016 M 211 ( 2 ) 02/23/2016 Common Shares, $.0033 par value per share 211 $ 0 59,789 D Stock Option (righ to buy) $ 18.7567 02/19/2016 M 29,789 ( 2 ) 02/23/2016 Common Shares, $.0033 par value per share 29,789 $ 0 30,000 D Stock Option (right to buy) $ 18.7567 02/19/2016 M 30,000 ( 2 ) 02/23/2016 Common Shares, $.0033 par value per share 30,000 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other GRANDISSON MARC C/O ARCH CAPITAL GROUP LTD. WATERLOO HOUSE, 100 PITTS BAY ROAD PEMBROKE, D0HM 08 President & COO Signatures /s/ Marc Grandisson 02/22/2016 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents a weighted average sales price; the sales prices range from $68.50 to $68.92. 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 holder of the issuer. ( 2 )The stock option became exercisable in three equal annual installments commencing February 23, 2009, subject to the applicable award agreement. ( 3 )On February 19, 2016, the reporting person exercised 30,000 stock options and, under the net settlement provisions of the applicable award agreement, 8,199 common shares were withheld in payment of the exercise price.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* 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).

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