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
OMB APPROVAL
OMB Number: 3235-0362
Expires: January 31, 2005
Estimated average burden hours per response... 1.0

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
(Last)
(First)
(Middle)

C/O ARCH CAPITAL GROUP LTD., WATERLOO HOUSE,100 PITTS BAY ROAD		 3. Statement for Issuer's Fiscal Year Ended (Month/Day/Year)
12/31/2018
(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, $.0011 par value per share 11/01/2018   G(1) 9,891 (2) D $ (1) 0 I By Limited Liability Company
Common Shares, $.0011 par value per share 11/01/2018   G(1) 9,891 A $ (1) 474,876 (2) D  
Common Shares, $.0011 par value per share 12/19/2018   G 1,200 D $ 0 473,676 D  
Common Shares, $.0011 par value per share 12/31/2018   G(4) 126,694 (4) D $ 0 (4) 478,334 (2) I By 2015 GRAT
Common Shares, $.0011 par value per share 12/31/2018   G(4) 126,694 (4) A $ 0 (4) 600,370 D  
Depositary Shares (3)             3,000 I By spouse
Depositary Shares (3)             7,000 D  

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
Share Appreciation Right $ 12.35 12/31/2018   G   193,164 (5) 02/29/2012 02/28/2022 Common Shares, $.0011 par value per share
193,164 (2)
$ 0 0
I
By 2014 GRAT
Share Appreciation Right $ 12.35 12/31/2018   G 193,164 (5)   02/29/2012 02/28/2022 Common Shares, $.0011 par value per share
193,164
$ 0 484,908 (2) (5)
D
 
Share Appreciation Right $ 12.86 12/31/2018   G   240,674 (6)   (7) 05/09/2022 Common Shares, $.0011 par value per share
240,674
$ 0 62,326 (2) (6)
I
By 2014 GRAT
Share Appreciation Right $ 12.86 12/31/2018   G 240,674 (6)     (7) 05/09/2022 Common Shares, $.0011 par value per share
240,674
$ 0 240,674 (2) (6)
D
 

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
IORDANOU CONSTANTINE
C/O ARCH CAPITAL GROUP LTD.
WATERLOO HOUSE,100 PITTS BAY ROAD
PEMBROKE, D0 HM 08		   X     Chairman  

Signatures

/s/ Constantine Iordanou 01/23/2019
**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 1, 2018, the limited liability company distributed 9,891 common shares indirectly beneficially owned by the reporting person to the reporting person's direct holdings.
(2) The amount of common shares includes common shares acquired in connection with a 3-for-1 share split effectuated by Arch Capital Group Ltd. on June 21, 2018.
(3) Each Depositary Share Represents 1/1,000th interest in a Series F Non-Cumulative Preferred Share.
(4) On December 31, 2018, 126,694 common shares were distributed from the 2015 GRAT. Such common shares were previously reported as indirectly held by the 2015 GRAT. Following the distribution, the reporting person owns these 126,694 common shares directly.
(5) On December 31, 2018, 193,164 SARs were distributed from the 2014 GRAT. Such SARs were previously reported as indirectly beneficially held by the 2014 GRAT. Following such distribution, the 2014 GRAT indirectly owns 0 and the reporting person owns 484,908 SARs directly.
(6) On December 31, 2018, 240,674 SARs were distributed from the 2014 GRAT. Such SARs were previously reported as indirectly beneficially held by the 2014 GRAT. Following such distribution, the 2014 GRAT indirectly owns 62,326 SARs and the reporting person owns 240,674 SARs directly.
(7) The share appreciation right became exercisable in three equal annual installments with the first installment being exercisable on May 9, 2014 and the second and third installments being exercisable on May 9, 2015 and May 9, 2016.

Note: File three copies of this Form, one of which must be manually signed. If space provided 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.