<SEC-DOCUMENT>0000947484-21-000078-index.html : 20210611
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<ACCEPTANCE-DATETIME>20210611163855
ACCESSION NUMBER:		0000947484-21-000078
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		20
CONFORMED PERIOD OF REPORT:	20210611
ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20210611
DATE AS OF CHANGE:		20210611

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARCH CAPITAL GROUP LTD.
		CENTRAL INDEX KEY:			0000947484
		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
		IRS NUMBER:				980374481
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-16209
		FILM NUMBER:		211011803

	BUSINESS ADDRESS:	
		STREET 1:		WATERLOO HOUSE, GROUND FLOOR
		STREET 2:		100 PITTS BAY ROAD
		CITY:			PEMBROKE
		STATE:			D0
		ZIP:			HM 08
		BUSINESS PHONE:		441-278-9250

	MAIL ADDRESS:	
		STREET 1:		WATERLOO HOUSE, GROUND FLOOR
		STREET 2:		100 PITTS BAY ROAD
		CITY:			PEMBROKE
		STATE:			D0
		ZIP:			HM 08

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ARCH CAPITAL GROUP LTD
		DATE OF NAME CHANGE:	20000508

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RISK CAPITAL HOLDINGS INC
		DATE OF NAME CHANGE:	19950816

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RISK CAPITAL RE INC
		DATE OF NAME CHANGE:	19950703
</SEC-HEADER>
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<FILENAME>acgl-20210611.htm
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<TEXT>
Document 1 - file: acgl-20210611.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.1
<SEQUENCE>2
<FILENAME>exhibit41tocertificateofde.htm
<DESCRIPTION>EX-4.1
<TEXT>
Document 2 - file: exhibit41tocertificateofde.htm

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<DOCUMENT>
<TYPE>EX-4.2
<SEQUENCE>3
<FILENAME>exhibit42toformofsharecert.htm
<DESCRIPTION>EX-4.2
<TEXT>
Document 3 - file: exhibit42toformofsharecert.htm

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<DOCUMENT>
<TYPE>EX-4.3
<SEQUENCE>4
<FILENAME>exhibit43todepositagreement.htm
<DESCRIPTION>EX-4.3
<TEXT>
Document 4 - file: exhibit43todepositagreement.htm

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<DOCUMENT>
<TYPE>EX-4.4
<SEQUENCE>5
<FILENAME>exhibit44toformofdepositar.htm
<DESCRIPTION>EX-4.4
<TEXT>
Document 5 - file: exhibit44toformofdepositar.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>6
<FILENAME>exhibit51toconyersopinion.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 6 - file: exhibit51toconyersopinion.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.2
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<FILENAME>exhibit52-cgropinion.htm
<DESCRIPTION>EX-5.2
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Document 7 - file: exhibit52-cgropinion.htm

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Document 11 - file: acgl-20210611_pre.xml

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Document 12 - file: image_2a.jpg

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<SEQUENCE>15
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Document 15 - file: Financial_Report.xlsx

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Document 16 - file: Show.js

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<SEQUENCE>17
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Document 17 - file: report.css

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<SEQUENCE>18
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Document 18 - file: FilingSummary.html

Document 18 - RAW XML: FilingSummary.xml

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<SEQUENCE>20
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Document 20 - file: MetaLinks.json

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<TYPE>ZIP
<SEQUENCE>21
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Document 21 - file: 0000947484-21-000078-xbrl.zip

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