    <SEC-DOCUMENT>0001193125-26-092498-index.html : 20260305
    <SEC-HEADER>0001193125-26-092498.hdr.sgml : 20260305
    <ACCEPTANCE-DATETIME>20260305070004
    ACCESSION NUMBER:		0001193125-26-092498
    CONFORMED SUBMISSION TYPE:	SCHEDULE 13D/A
    PUBLIC DOCUMENT COUNT:		4
    FILED AS OF DATE:		20260305
    DATE AS OF CHANGE:		20260305

    SUBJECT COMPANY:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BERKLEY W R CORP
    		CENTRAL INDEX KEY:			0000011544
    		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
    		ORGANIZATION NAME:           	02 Finance
    		EIN:				221867895
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		SCHEDULE 13D/A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	005-30068
    		FILM NUMBER:		26724142

    	BUSINESS ADDRESS:
    		STREET 1:		475 STEAMBOAT ROAD
    		STREET 2:		.
    		CITY:			GREENWICH
    		STATE:			CT
    		ZIP:			06830
    		BUSINESS PHONE:		2036293000

    	MAIL ADDRESS:
    		STREET 1:		475 STEAMBOAT ROAD
    		STREET 2:		.
    		CITY:			GREENWICH
    		STATE:			CT
    		ZIP:			06830

    FILED BY:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MITSUI SUMITOMO INSURANCE CO LTD
    		CENTRAL INDEX KEY:			0001142206
    		STANDARD INDUSTRIAL CLASSIFICATION:	FIRE, MARINE & CASUALTY INSURANCE [6331]
    		ORGANIZATION NAME:           	02 Finance
    		EIN:				000000000
    		STATE OF INCORPORATION:			M0
    		FISCAL YEAR END:			0331

    	FILING VALUES:
    		FORM TYPE:		SCHEDULE 13D/A

    	BUSINESS ADDRESS:
    		STREET 1:		9, KANDA SURUGADAI 3-CHOME
    		STREET 2:		CHIYODA-KU
    		CITY:			TOKYO
    		STATE:			M0
    		ZIP:			101-8011
    		BUSINESS PHONE:		81332593111

    	MAIL ADDRESS:
    		STREET 1:		9, KANDA SURUGADAI 3-CHOME
    		STREET 2:		CHIYODA-KU
    		CITY:			TOKYO
    		STATE:			M0
    		ZIP:			101-8011
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>SCHEDULE 13D/A
    <SEQUENCE>1
    <FILENAME>primary_doc.xml
    <TEXT>
    Document 1 - file: primary_doc.html

    Document 1 - RAW XML: primary_doc.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.10
    <SEQUENCE>2
    <FILENAME>ck0000000000-ex99_10.pdf
    <DESCRIPTION>EX-99.10
    <TEXT>
    Document 2 - file: ck0000000000-ex99_10.pdf

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.12
    <SEQUENCE>3
    <FILENAME>ck0000000000-ex99_12.pdf
    <DESCRIPTION>EX-99.12
    <TEXT>
    Document 3 - file: ck0000000000-ex99_12.pdf

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.13
    <SEQUENCE>4
    <FILENAME>ck0000000000-ex99_13.pdf
    <DESCRIPTION>EX-99.13
    <TEXT>
    Document 4 - file: ck0000000000-ex99_13.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>