Please wait



(Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Checkbox not checked   Rule 13d-1(b)
Checkbox not checked   Rule 13d-1(c)
Checkbox not checked   Rule 13d-1(d)


SCHEDULE 13D/A 0000918186 XXXXXXXX LIVE 1 Common Stock, par value $0.20 per share 03/04/2026 false 0000011544 084423102 W. R. BERKLEY CORPORATION 475 Steamboat Road Greenwich CT 06830 Attn: Kelly F. O'Donnell (203) 629-4800 WR Berkley & Others LLC 475 Steamboat Road Greenwich CT 06830 Wachtell, Lipton, Rosen & Katz (212) 403-1309 Attention: David A. Katz, Esq. 51 West 52nd Street New York NY 10019 Y WR Berkley & Others LLC b OO N X1 63515547 32035597 63515547 32035597 95551144 Y 25.51 HC The aggregate amount in row (11) does not reflect shares of common stock, par value $0.20 per share (the "Common Stock"), of W. R. Berkley Corporation (the "Issuer") held by MS&AD Insurance Group Holdings, Inc., a kabushiki kaisha (stock corporation) organized under the laws of Japan ("MS&AD Holdings"), and Mitsui Sumitomo Insurance Co., Ltd., a kabushiki kaisha (stock corporation) organized under the laws of Japan ("MSI" and together with MS&AD Holdings, the "MSI Entities"), as further described in Items 5(a) and 6. Percentages are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. Y WR Berkley & Others 2 LLC b OO N X1 3553486 91997658 3553486 91997658 95551144 Y 25.51 HC The aggregate amount in row (11) does not reflect shares of Common Stock held by the MSI Entities, as further described in Items 5(a) and 6. Percentages are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. 0000918186 N William R. Berkley b OO N X1 17363285 78187859 17363285 78187859 95551144 Y 25.51 IN The aggregate amount in row (11) does not reflect shares of Common Stock held by the MSI Entities, as further described in Items 5(a) and 6. Percentages are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. Y Marjorie J. Berkley b OO N X1 204364 95346780 204364 95346780 95551144 Y 25.51 IN The aggregate amount in row (11) does not reflect shares of Common Stock held by the MSI Entities, as further described in Items 5(a) and 6. Percentages are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. Y W. Robert Berkley, Jr. b OO N X1 4552770 90998374 4552770 90998374 95551144 Y 25.51 IN The aggregate amount in row (11) does not reflect shares of Common Stock held by the MSI Entities, as further described in Items 5(a) and 6. Percentages are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. Y The William R. Berkley 2011 GST Trust u/a dated December 20, 2011 b OO N X1 1350000 94201144 1350000 94201144 95551144 Y 25.51 OO The aggregate amount in row (11) does not reflect shares of Common Stock held by the MSI Entities, as further described in Items 5(a) and 6. Percentages are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. Y The William R. Berkley 2022 Family Trust f/b/o William R. Berkley, Jr. and His Issue b OO N X1 4287201 91263943 4287201 91263943 95551144 Y 25.51 OO The aggregate amount in row (11) does not reflect shares of Common Stock held by the MSI Entities, as further described in Items 5(a) and 6. Percentages are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. Y The William R. Berkley 2022 Family Trust f/b/o Lauren Berkley and Her Issue b OO N X1 724491 94826653 724491 94826653 95551144 Y 25.51 OO The aggregate amount in row (11) does not reflect shares of Common Stock held by the MSI Entities, as further described in Items 5(a) and 6. Percentages are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. Common Stock, par value $0.20 per share W. R. BERKLEY CORPORATION 475 Steamboat Road Greenwich CT 06830 This Amendment No. 1 (this "Amendment No. 1") to Schedule 13D amends and supplements the statement on Schedule 13D filed with the United States Securities and Exchange Commission on December 5, 2025 (as it may be amended from time to time, collectively, the "Schedule 13D"), relating to W.R. Berkeley Corporation (the "Issuer"). Except as set forth herein, the Schedule 13D is unmodified. All capitalized terms contained herein but not otherwise defined shall have the meanings ascribed to such terms in the Schedule 13D. Information given in response to each item shall be deemed incorporated by reference in all other items, as applicable. The persons filing this Statement on Schedule 13D (this "Statement") are WR Berkley & Others LLC, a Delaware limited liability company ("Family Holdings"), WR Berkley & Others 2 LLC, a Delaware limited liability company ("Family Holdings 2"), William R. Berkley, Marjorie J. Berkley, W. Robert Berkley, Jr., The William R. Berkley 2011 GST Trust u/a dated December 20, 2011, The William R. Berkley 2022 Family Trust f/b/o William R. Berkley, Jr. and His Issue and The William R. Berkley 2022 Family Trust f/b/o Lauren Berkley and Her Issue (collectively, the "Reporting Persons"). Family Holdings is a Delaware limited liability company. The members of Family Holdings and Family Holdings 2 are William R. Berkley (direct owner of 16.7732% of each of the limited liability company interests thereof), WRB 2018 Irrevocable Family Trust dated as of September 4, 2018 (direct owner of each of 43.2268% of the limited liability company interests thereof) and WRB 2024 GRAT No. 1 dated as of November 19, 2024 (direct owner of 40.000% of the each of limited liability interest thereof). William R. Berkley is the trustee of WRB 2018 Irrevocable Family Trust dated as of September 4, 2018, and Marjorie J. Berkley is the trustee of WRB 2024 GRAT No. 1. The aggregate number of shares held by these three entities is expected to remain constant although there may be fluctuations in the holdings among the individual entities. William R. Berkley is the chairman of the Issuer's board of directors, is the spouse of Marjorie J. Berkley, and is the father of W. Robert Berkley, Jr (the chief executive officer of the Issuer). Marjorie J. Berkley is the spouse of William R. Berkley, and the mother of W. Robert Berkley, Jr. The principal business address of each of the Reporting Persons is 475 Steamboat Road, Greenwich CT 06830. Schedule A to this Statement includes the name, business address, present principal occupation or employment and citizenship of the managers of each of the Reporting Persons and is incorporated herein by reference. During the last five years, none of the Reporting Persons nor any of their respective managers identified in Schedule A to this Statement has been convicted in a criminal proceeding (excluding traffic violations and similar misdemeanors). During the last five years, none of the Reporting Persons nor any of their respective managers identified in Schedule A to this Statement was a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. * WR Berkley & Others LLC is a Delaware limited liability company * WR Berkley & Others 2 LLC is a Delaware limited liability company * William R. Berkley, Marjorie J. Berkley and W. Robert Berkley, Jr are United States Citizens * The William R. Berkley 2011 GST Trust u/a dated December 20, 2011 is a trust organized under the laws of the state of Delaware * The William R. Berkley 2022 Family Trust f/b/o William R. Berkley, Jr. and His Issue The William R. Berkley 2022 Family Trust f/b/o Lauren Berkley and Her Issu are each trusts organized under the laws of the state of Florida. The shares of Common Stock reported as beneficially owned by the Reporting Persons were acquired in or before the initial public offering of the Issuer, through open market purchases using personal funds, by means of gift, inheritance or other gratuitous transfer, or through their service as an officer, director or employee of the Issuer. Item 4 is hereby amended by replacing the first paragraph with the following: Calculations of the Reporting Persons' beneficial ownership on the cover pages and in Item 5(a) of this Statement are based on 374,490,856 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. However, when calculating MSI's percentage ownership for certain purposes under the Framework Agreement and LLC Agreement, MSI uses as its denominator 391,869,666 shares of Common Stock, which comprises such number of shares of Common Stock outstanding as of February 23, 2026 and 17,378,810 shares of Common Stock held in a grantor trust as of December 31, 2025, each as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. We refer to that aggregate number as the "Outstanding Agreement Shares." Item 4 is hereby amended and supplemented by adding the following paragraph as the second to last paragraph of Item 4: In connection with MSI's acquisition of fifteen percent (15%) of the Outstanding Agreement Shares, MSI designated Andrew Carrier, an executive officer of MSI, to serve as a director of the Issuer. Mr. Carrier was nominated to the slate of directors up for election to the Issuer's Board at the Issuer's 2026 annual meeting by the Issuer's Board following the recommendation of the Issuer's Nominating and Corporate Governance Committee to the Board. Mr. Carrier is anticipated to be elected to the Board at the annual meeting of stockholders of the Issuer scheduled to be held in June 2026. Mr. Carrier was designated by MSI pursuant to the terms of the Framework Agreement. Item 5(a) is amended and restated in its entirety as follows: The Reporting Persons beneficially own 95,551,144 shares of Common Stock, representing approximately 25.51% of the shares of Common Stock outstanding. The percentage beneficial ownership of the Reporting Persons has been determined based on 380,021,174 shares of Common Stock outstanding as of February 23, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 27, 2026. The beneficial ownership information set forth above does not include any securities of the Issuer beneficially owned by MSI. As a result of the Framework Agreement and LLC Agreement described in Item 6 of this Statement, the Reporting Persons may be deemed to beneficially own and share voting power over the shares of Common Stock beneficially owned by MSI. As of the date hereof, MSI beneficially owns an aggregate of 58,780,450 shares of Common Stock (representing approximately fifteen and seven-tenths percent 15.7% of the total number of shares of Common Stock outstanding). This Statement is not an admission or acknowledgment that the Reporting Persons constitute a "group" within the meaning of Rule 13d-5(b)(1) under the Act with MSI. In addition to the description set forth above in Item 5(a), see the cover pages of this Statement for indications of the respective voting powers and disposition powers of the Reporting Persons. None Except as set forth herein, no one other than the Reporting Persons has the right to receive, or the power to direct the receipt of, dividends from, or the proceeds from the sale of, any of the securities of the Issuer beneficially owned by the Reporting Persons as described in this Item 5. Not applicable. Item 6 is hereby amended and supplemented by adding the following at the end of the second paragraph of the subsection entitled "Framework Agreement" in Item 6: The Closing Date is March 4, 2026. Item 6 is hereby amended and supplemented by adding the following paragraphs at the end of the subsection entitled "Limited Liability Company Agreement" in Item 6: The foregoing description of the LLC Agreement does not purport to be complete and is subject to, and qualified in its entirety by, the text of such agreement, which is attached hereto as Exhibit 99.3 and incorporated herein by reference. 99.1 Joint Filing Agreement, dated December 11, 2025 (filed previously) 99.2 Framework Agreement (incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed by the Issuer on March 28, 2025) 99.3 Amended and Restated Limited Liability Company Agreement, dated March 4, 2026, by and among, Symphony Partners, LLC, Mitsui Sumitomo Insurance Co., Ltd. and WR Berkley & Others LLC WR Berkley & Others LLC /s/ W. Robert Berkley, Jr. W. Robert Berkley, Jr. /Manager 03/05/2026 WR Berkley & Others 2 LLC /s/ W. Robert Berkley, Jr. W. Robert Berkley, Jr. / Manager 03/05/2026 William R. Berkley /s/ William R. Berkley William R. Berkley 03/05/2026 Marjorie J. Berkley /s/ Marjorie J. Berkley Marjorie J. Berkley 03/05/2026 W. Robert Berkley, Jr. /s/ W. Robert Berkley, Jr. W. Robert Berkley, Jr. 03/05/2026 The William R. Berkley 2011 GST Trust u/a dated December 20, 2011 /s/ W. Robert Berkley, Jr. W. Robert Berkley, Jr. /Trustee 03/05/2026 The William R. Berkley 2022 Family Trust f/b/o William R. Berkley, Jr. and His Issue /s/ Marjorie J. Berkley Marjorie J. Berkley/Trustee 03/05/2026 The William R. Berkley 2022 Family Trust f/b/o Lauren Berkley and Her Issue /s/ Marjorie J. Berkley Marjorie J. Berkley/Trustee 03/05/2026