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
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  Morin Francois
2. Date of Event Requiring Statement (Month/Day/Year)
05/25/2018
3. Issuer Name and Ticker or Trading Symbol
ARCH CAPITAL GROUP LTD. [ACGL]
(Last)
(First)
(Middle)
C/O ARCH CAPITAL GROUP LTD., WATERLOO HOUSE, 100 PITTS BAY ROAD
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP and CFO
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 8,902
D
 
Common Shares, $.0033 par value per share 28,435
I
See Footnote (11)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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.

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) 10/03/2021 Common Shares, $.0033 par value per share 5,400 $ 31.93 D  
Share Appreciation Right   (2) 05/09/2022 Common Shares, $.0033 par value per share 2,100 $ 38.58 D  
Share Appreciation Right 11/12/2017 11/12/2022 Common Shares, $.0033 par value per share 5,500 $ 42.65 D  
Share Appreciation Right   (3) 05/09/2023 Common Shares, $.0033 par value per share 1,885 $ 53.53 D  
Share Appreciation Right   (4) 07/25/2023 Common Shares, $.0033 par value per share 1,675 $ 54.28 D  
Share Appreciation Right   (5) 05/13/2024 Common Shares, $.0033 par value per share 2,000 $ 57.27 D  
Share Appreciation Right   (6) 12/04/2024 Common Shares, $.0033 par value per share 1,533 $ 58.28 D  
Stock Option (right to buy)   (7) 05/13/2025 Common Shares, $.0033 par value per share 3,820 $ 62.505 D  
Stock Option (right to buy)   (8) 05/13/2026 Common Shares, $.0033 par value per share 4,210 $ 71.7 D  
Stock Option (right to buy)   (9) 05/08/2027 Common Shares, $.0033 par value per share 3,670 $ 96.26 D  
Stock Option (right to buy)   (10) 05/11/2028 Common Shares, $.0033 par value per share 10,408 $ 79.65 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Morin Francois
C/O ARCH CAPITAL GROUP LTD.
WATERLOO HOUSE, 100 PITTS BAY ROAD
PEMBROKE, D0 HM 08
      EVP and CFO  

Signatures

/s/ Francois Morin 06/04/2018
**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 October 3, 2012 and the next two installments on October 3, 2013 and October 3, 2014, 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 9, 2013 and the next two installments on May 9, 2014 and May 9, 2015, 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 9, 2014 and the next two installments on May 9, 2015 and May 9, 2016, 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 July 25, 2014 and the next two installments on July 25, 2015 and July 25, 2016, 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 13, 2015 and the next two installments on May 13, 2016 and May 13, 2017, subject to the applicable award agreement.
(6) The Share Appreciation Right became exercisable in three equal annual installments, with the first installment becoming exercisable on December 4, 2015 and the next two installments on December 4, 2016 and December 4, 2017, subject to the applicable award agreement.
(7) The Stock Option is 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.
(8) The Stock Option is 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.
(9) The Stock Option is exercisable in three equal annual installments, with the first installment becoming exercisable on May 8, 2018 and the next two installments on May 8, 2019 and May 8, 2020, subject to the applicable award agreement.
(10) The Stock Option is exercisable in three equal annual installments, with the first installment becoming exercisable on May 11, 2019, and the next two installments on May 11, 2020 and May 11, 2021, subject to the applicable award agreement.
(11) The reporting person owns such common shares indirectly with his spouse.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.