Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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. Date of Event Requiring Statement (Month/Day/Year)
03/24/2017		 3. Issuer Name and Ticker or Trading Symbol
ARCH CAPITAL GROUP LTD. [ACGL]
(Last)
(First)
(Middle)
C/O ARCH CAPITAL GROUP LTD, 100 PITTS BAY ROAD, WATERLOO HOUSE		 4. 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
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PEMBROKE, D0 HM 08		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Shares, $.0033 par value per share 254,024
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Share Appreciation Right   (1) 05/09/2018 Common Shares, $.0033 par value per share 25,050 $ 23.1 D  
Share Appreciation Right   (2) 05/06/2019 Common Shares, $.0033 par value per share 17,250 $ 19.293 D  
Share Appreciation Right   (3) 05/05/2020 Common Shares, $.0033 par value per share 17,250 $ 25.01 D  
Share Appreciation Right   (4) 05/06/2021 Common Shares, $.0033 par value per share 14,700 $ 33.913 D  
Share Appreciation Right   (5) 05/09/2022 Common Shares, $.0033 par value per share 15,250 $ 38.58 D  
Share Appreciation Right 11/12/2017 11/12/2022 Common Shares, $.0033 par value per share 22,410 $ 42.65 D  
Share Appreciation Right   (6) 05/09/2023 Common Shares, $.0033 par value per share 10,770 $ 53.53 D  
Share Appreciation Right   (7) 05/13/2024 Common Shares, $.0033 par value per share 9,000 $ 57.27 D  
Share Appreciation Right   (8) 11/06/2024 Common Shares, $.0033 par value per share 17,417 $ 57.08 D  
Stock Option (right to buy)   (9) 05/13/2025 Common Shares, $.0033 par value per share 9,220 $ 62.505 D  
Stock Option(right to buy)   (10) 05/13/2026 Common Shares, $.0033 par value per share 7,310 $ 71.7 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/ Nicolas Papadopoulo 03/24/2017
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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, with the first installment becoming exercisable on May 9, 2009 and the next two installments on May 9, 2010 and May 9, 2011, subject to the applicable award agreement.
(2) The Share Appreciation Right became exercisable in three equal annual installments, with the first installment becoming exercisable on May 6, 2010 and the next two installments on May 6, 2011 and May 6, 2012, subject to the applicable award agreement.
(3) The Share Appreciation Right became exercisable in three equal annual installments, with the first installment becoming exercisable on May 5, 2011 and the next two installments on May 5, 2012 and May 5, 2013, subject to the applicable award agreement.
(4) The Share Appreciation Right became exercisable in three equal annual installments, with the first installment becoming exercisable on May 6, 2012 and the next two installments on May 6, 2013 and May 6, 2014, subject to the applicable award agreement.
(5) The Share Appreciation Right became exercisable in three equal annual installments, with the first installment becoming exercisable on May 9, 2013 and the next two installments on May 9, 2014 and May 9, 2015, subject to the applicable award agreement.
(6) The Share Appreciation Right becomes exercisable in three equal annual installments, with the first installment becoming exercisable on May 9, 2014 and the next two installments on May 9, 2015 and May 9, 2016, subject to the applicable award agreement.
(7) The Share Appreciation Right becomes exercisable in three equal annual installments, with the first installment becoming exercisable on May 13, 2015 and the next two installments on May 13, 2016 and May 13, 2017, subject to the applicable award agreement.
(8) The Share Appreciation Right becomes exercisable in three equal annual installments, with the first installment becoming exercisable on November 6, 2015 and the next two installments on November 6, 2016 and November 6, 2017, subject to the applicable award agreement.
(9) The Stock Option becomes exercisable in three equal annual installments, with the first installment becoming exercisable on May 13, 2016 and the next two installments on May 13, 2017 and May 13, 2018, subject to the applicable award agreement.
(10) The Stock Option becomes exercisable in three equal annual installments, with the first installment becoming exercisable on May 13, 2017 and the next two installments on May 13, 2018 and May 13, 2019, subject to the applicable award agreement.

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