Ownership Submission
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 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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Papadopoulo Nicolas
  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
_____ Officer (give title below) __X__ Other (specify below)
CEO of Arch Reinsurance Group
(Last)
(First)
(Middle)
C/O ARCH CAPITAL GROUP LTD, 100 PITTS BAY ROAD, WATERLOO HOUSE
3. Date of Earliest Transaction (Month/Day/Year)
09/07/2017
(Street)

PEMBROKE, D0 HM 08
4. If Amendment, Date Original Filed(Month/Day/Year)
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 (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 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 09/07/2017   M   17,250 A $ 19.293 262,462 (9) D  
Common Shares, $.0033 par value per share 09/07/2017   M   17,250 A $ 25.01 279,712 D  
Common Shares, $.0033 par value per share 09/07/2017   M   14,700 A $ 33.913 294,412 D  
Common Shares, $.0033 par value per share 09/07/2017   M   15,250 A $ 38.58 309,662 D  
Common Shares, $.0033 par value per share 09/07/2017   M   10,770 A $ 53.53 320,432 D  
Common Shares, $.0033 par value per share 09/07/2017   M   9,000 A $ 57.27 329,432 D  
Common Shares, $.0033 par value per share 09/07/2017   M   11,617 A $ 57.08 341,049 D  
Common Shares, $.0033 par value per share 09/07/2017   F   39,402 D $ 91.53 301,647 D  
Common Shares, $.0033 par value per share 09/08/2017   S   80,694 D $ 93.8012 (8) 220,953 D  

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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 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
Share Appreciation Right $ 19.293 09/07/2017   M     17,250   (1) 05/06/2019 Common Shares, $.0033 par value per share 17,250 $ 0 0 D  
Share Appreciation Right $ 25.01 09/07/2017   M     17,250   (2) 05/05/2020 Common Shares, $.0033 par value per share 17,250 $ 0 0 D  
Share Appreciation Right $ 33.913 09/07/2017   M     14,700   (3) 05/06/2021 Common Shares, $.0033 par value per share 14,700 $ 0 0 D  
Share Appreciation Right $ 38.58 09/07/2017   M     15,250   (4) 05/09/2022 Common Shares, $.0033 par value per share 15,250 $ 0 0 D  
Share Appreciation Right $ 53.53 09/07/2017   M     10,770   (5) 05/09/2023 Common Shares, $.0033 par value per share 10,770 $ 0 0 D  
Share Appreciation Right $ 57.27 09/07/2017   M     9,000   (6) 05/13/2024 Common Shares, $.0033 par value per share 9,000 $ 0 0 D  
Share Appreciation Right $ 57.08 09/07/2017   M     11,617   (7) 11/06/2024 Common Shares, $.0033 par value per share 11,617 $ 0 5,800 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Papadopoulo Nicolas
C/O ARCH CAPITAL GROUP LTD
100 PITTS BAY ROAD, WATERLOO HOUSE
PEMBROKE, D0 HM 08
      CEO of Arch Reinsurance Group

Signatures

 /s/ Marcy Rathman, Attorney in Fact   09/11/2017
**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) The share appreciation right became exercisable in three equal annual installments commencing May 6, 2010, subject to the applicable award agreement.
(2) The share appreciation right became exercisable in three equal annual installments commencing May 5, 2011, subject to the applicable award agreement.
(3) The share appreciation right became exercisable in three equal annual installments commencing May 6, 2012, subject to the applicable award agreement.
(4) The share appreciation right became exercisable in three equal annual installments commencing May 9, 2013, subject to the applicable award agreement.
(5) The share appreciation right became exercisable in three equal annual installments commencing May 9, 2014, subject to the applicable award agreement
(6) The share appreciation right became exercisable in three equal annual installments commencing May 13, 2015, subject to the applicable award agreement
(7) The share appreciation right became exercisable in three equal annual installments commencing November 6, 2015, subject to the applicable award agreement
(8) Represents a weighted average sale price; the sales prices range from $93.32 to $94.30. Upon request, the full 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.
(9) Amount includes 300 common shares acquired under the Arch Capital Group Ltd. Employee Share Purchase Plan on May 31, 2017.

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