# Filing Detail

Form SCHEDULE 13D/A - General Statement of Acquisition of Beneficial Ownership: [Amend]
SEC Accession No. 0001193125-26-092498
Filing Date
2026-03-05
Accepted
2026-03-05 07:00:04
Documents
4

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 |  | primary_doc.html | SCHEDULE 13D/A |
1 |  | primary_doc.xml | SCHEDULE 13D/A | 14214
2 | EX-99.10 | ck0000000000-ex99_10.pdf | EX-99.10 | 106081
3 | EX-99.12 | ck0000000000-ex99_12.pdf | EX-99.12 | 1435331
4 | EX-99.13 | ck0000000000-ex99_13.pdf | EX-99.13 | 271233
| Complete submission text file | 0001193125-26-092498.txt |  | 2513345

Mailing Address 475 STEAMBOAT ROAD . GREENWICH CT 06830
Business Address 475 STEAMBOAT ROAD . GREENWICH CT 06830 2036293000
BERKLEY W R CORP (Subject) CIK: 0000011544 (see all company filings)

EIN.: 221867895 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SCHEDULE 13D/A | Act: 34 | File No.: 005-30068 | Film No.: 26724142
SIC: 6331 Fire, Marine & Casualty Insurance
(CF Office: 02 Finance)

Mailing Address 9, KANDA SURUGADAI 3-CHOME CHIYODA-KU TOKYO M0 101-8011
Business Address 9, KANDA SURUGADAI 3-CHOME CHIYODA-KU TOKYO M0 101-8011 81332593111
MITSUI SUMITOMO INSURANCE CO LTD (Filed by) CIK: 0001142206 (see all company filings)

EIN.: 000000000 | State of Incorp.: M0 | Fiscal Year End: 0331
Type: SCHEDULE 13D/A
SIC: 6331 Fire, Marine & Casualty Insurance
(CF Office: 02 Finance)