# EDGAR Filing Document

**Accession Number:** 0000918186
**File Stem:** 0001193125-25-316616
**Filing Date:** 2025-12
**Character Count:** 34880
**Document Hash:** 3802b9b43303c16ff1e1b7c89e07dc51
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-316616.hdr.sgml**: 20251211

**ACCESSION NUMBER**: 0001193125-25-316616

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20251211

**DATE AS OF CHANGE**: 20251211

**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
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-30068
- **FILM NUMBER:** 251566429

**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:** BERKLEY WILLIAM R
- **CENTRAL INDEX KEY:** 0000918186
- **STANDARD INDUSTRIAL CLASSIFICATION:** UNKNOWN SIC - 0000 [0000]

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** CT
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**MAIL ADDRESS:**
- **STREET 1:** 165 MASON STREET
- **CITY:** GREENWICH
- **STATE:** CT
- **ZIP:** 06830

### Attached PDF Documents

**Attachment 1:** `ck0000000000-ex99_1.pdf`

_No text found in this document._

**Attachment 2:** `ck0000000000-ex99_2.pdf`

_No text found in this document._

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**W. R. BERKLEY CORPORATION**

*(Name of Issuer)*

**Common Stock, par value $0.20 per share**

*(Title of Class of Securities)*

**084423102**

*(CUSIP Number)*

**Attn: Kelly F. O'Donnell**<br>WR Berkley & Others LLC<br>475 Steamboat Road<br>Greenwich CT 06830<br>(203) 629-4800

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**12/05/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **084423102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**WR Berkley & Others LLC** | Name of reporting person<br>**WR Berkley & Others LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**63515547.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**32035597.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**63515547.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**32035597.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.14%** | Percent of class represented by amount in Row (11)<br>**25.14%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**HC** | Type of Reporting Person (See Instructions)<br>**HC** | |

---

**Comment for Reporting Person:** 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 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

| **CUSIP No.** | **084423102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**WR Berkley & Others 2 LLC** | Name of reporting person<br>**WR Berkley & Others 2 LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**3553486.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**91997658.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**3553486.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**91997658.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.14%** | Percent of class represented by amount in Row (11)<br>**25.14%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**HC** | Type of Reporting Person (See Instructions)<br>**HC** | |

---

**Comment for Reporting Person:** 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 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

| **CUSIP No.** | **084423102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**William R. Berkley** | Name of reporting person<br>**William R. Berkley** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**17363285.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**78187859.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**17363285.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**78187859.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.14%** | Percent of class represented by amount in Row (11)<br>**25.14%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** 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 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

| **CUSIP No.** | **084423102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Marjorie J. Berkley** | Name of reporting person<br>**Marjorie J. Berkley** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**204364.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**95346780.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**204364.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**95346780.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.14%** | Percent of class represented by amount in Row (11)<br>**25.14%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** 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 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

| **CUSIP No.** | **084423102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**W. Robert Berkley, Jr.** | Name of reporting person<br>**W. Robert Berkley, Jr.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**4552770.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**90998374.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**4552770.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**90998374.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.14%** | Percent of class represented by amount in Row (11)<br>**25.14%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** 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 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

| **CUSIP No.** | **084423102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**The  William R. Berkley 2011 GST Trust u/a dated December 20, 2011** | Name of reporting person<br>**The  William R. Berkley 2011 GST Trust u/a dated December 20, 2011** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**1350000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**94201144.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**1350000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**94201144.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.14%** | Percent of class represented by amount in Row (11)<br>**25.14%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** 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 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

| **CUSIP No.** | **084423102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**The William R. Berkley 2022 Family Trust f/b/o William R. Berkley, Jr. and His Issue** | Name of reporting person<br>**The William R. Berkley 2022 Family Trust f/b/o William R. Berkley, Jr. and His Issue** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**4287201.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**91263943.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**4287201.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**91263943.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.14%** | Percent of class represented by amount in Row (11)<br>**25.14%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** 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 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

| **CUSIP No.** | **084423102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**The William R. Berkley 2022 Family Trust f/b/o Lauren Berkley and Her Issue** | Name of reporting person<br>**The William R. Berkley 2022 Family Trust f/b/o Lauren Berkley and Her Issue** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**724491.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**94826653.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**724491.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**94826653.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | Aggregate amount beneficially owned by each reporting person<br>**95551144.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**25.14%** | Percent of class represented by amount in Row (11)<br>**25.14%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** 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 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.20 per share

**(b) Name of Issuer:**
W. R. BERKLEY CORPORATION

**(c) Address of Issuer's Principal Executive Offices:**
475 Steamboat Road, Greenwich, CT, 06830

The Reporting Persons are filing this statement on Schedule 13D (the "Statement") to report certain transactions related to the acquisition of beneficial ownership by the MSI Entities of at least 12.5% of the common stock of the Issuer on December 7, 2025 (as described in greater detail in Items 5 and 6 below).

**Item 4. Purpose of Transaction**

Calculations of the Reporting Persons' beneficial ownership on the cover pages and in Item 5(a) of this Statement are based on 380,021,174 shares of Common Stock outstanding as of October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025. However, when calculating MSI's percentage ownership for certain purposes under the Framework Agreement, LLC Agreement (each as defined below), MSI uses as its denominator 397,680,471 shares of Common Stock, which comprises such number of shares of Common Stock outstanding as of October 28, 2025 and 17,659,297 shares of Common Stock held in a grantor trust as of September 30, 2025, each as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025. We refer to that aggregate number as the "Outstanding Agreement Shares."

In addition, on March 28, 2025, Family Holdings entered into a Framework Agreement (the "Framework Agreement") with MSI, as further described in Item 6 below. Pursuant to the Framework Agreement, on the Director Appointment Date (as defined below), MSI will be able to designate one acceptable director candidate, whose appointment to the board of directors of the Issuer (the "Board") will be recommended by Family Holdings and who will be subject to review and approval by the Nominating and Corporate Governance Committee of the Board pursuant to its customary policies and procedures.

As publicly announced by the Issuer on December 5, 2025, MSI currently beneficially owns over twelve and a half percent (12.5%) of the outstanding shares of Common Stock, giving it the right to designate an acceptable director candidate for appointment to the Board after March 15, 2026 if all required regulatory approvals have been obtained, as further described in Item 6 below. MSI expects to make additional purchases of Common Stock, up to a maximum of fifteen percent (15%) of the Outstanding Agreement Shares by March 31, 2026. Such shares were not and will not be acquired from Family Holdings, the Berkley family or the Issuer. In addition, on the Closing Date (as defined below), MSI and Family Holdings will enter into the LLC Agreement, as further described in Item 6 below.

The Reporting Persons have acquired the Common Stock to which this Statement relates for investment purposes. The Reporting Persons will continue to evaluate their investment in the Issuer on the basis of various factors, including the Issuer's business, financial condition, results of operations and prospects, general economic and industry conditions, and the securities markets in general and those for the Issuer's securities. Based upon such evaluation, the Reporting Persons may take such actions in the future as they may deem appropriate in light of the circumstances existing from time to time. Depending on market and other factors, the Reporting Persons may seek to acquire additional shares of Common Stock in the open market or in private transactions, or otherwise.

Under the Framework Agreement and LLC Agreement, MSI will vote its shares of Common Stock in accordance with the recommendation of Family Holdings (prior to the Closing Date) and the board of Symphony Partners (after the Closing Date), in each case except in limited circumstances where MSI's shares will be voted in the same proportion as shares not owned by MSI are voted.

Except as set forth in this Item 4 or Item 6, which is incorporated by reference, the Reporting Persons do not have any present plans or proposals with respect to any of the actions specified in Item 4 of Schedule 13D.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The Reporting Persons beneficially own 95,551,144 shares of Common Stock, representing approximately 25.14% 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 October 28, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 3, 2025.

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 48,601,588 shares of Common Stock (representing approximately twelve and eight tenths percent (12.8%) 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.

**(b)**
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.

**(c)**
None

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Joint Filing Agreement

A Joint Filing Agreement, dated December 11, 2025, by and among the Reporting Persons, has been executed by the Reporting Persons.

Framework Agreement

On March 28, 2025, Family Holdings entered into the Framework Agreement with MSI. Pursuant to the Framework Agreement, once MSI acquires four and nine tenths percent (4.9%) of the outstanding shares of Common Stock, and until the Closing Date, MSI will vote those shares in accordance with the recommendation of Family Holdings, except in limited circumstances where the MSI shares will be voted in the same proportion as shares not owned by MSI are voted.

As of the earlier of (1) the date on which MSI acquires fifteen percent (15%) of the Outstanding Agreement Shares or such earlier date as may be designated by MSI to Family Holdings in writing after the required regulatory approvals contemplated by the Framework Agreement have been obtained (the "Closing Date") and (2) March 15, 2026, so long as on such date MSI has acquired at least twelve and a half percent (12.5%) of the outstanding shares of Common Stock and the required regulatory approvals have been obtained (such earlier date, the "Director Appointment Date"), Family Holdings will recommend the appointment of an acceptable MSI director designee to the Board, subject to review and approval by the Board's Nominating and Corporate Governance Committee pursuant to its customary policies and procedures, and will take all reasonable steps to cooperate with MSI in furtherance of meeting the Equity Method Accounting Requirements (as defined in the Framework Agreement).  MSI has informed the Issuer that it intends to complete the transactions contemplated by the Framework Agreement and enter into the LLC Agreement in the first quarter of 2026.

Under the Framework Agreement, MSI has also agreed to customary standstill restrictions relating to the Issuer that are directly enforceable by Family Holdings and the Issuer.

Limited Liability Company Agreement

On the Closing Date, Family Holdings and MSI will enter into the Amended and Restated Limited Liability Company Agreement (the "LLC Agreement") of Symphony Partners, LLC ("Symphony Partners") substantially in the form attached as Exhibit A to the Framework Agreement, pursuant to which Symphony Partners is to be operated following the Closing Date. Pursuant to the LLC Agreement, except as otherwise set forth therein, at any annual or special meeting of the Issuer's stockholders, each of Family Holdings and MSI will vote their respective shares of Common Stock as determined by the board of directors of Symphony Partners, which will be composed of two (2) directors appointed by MSI and two (2) directors appointed by Family Holdings, one of whom will be the chairperson and will cast the tie-breaking vote if there is a tie, except with respect to certain reserved matters. As a result, determinations by the board of Symphony Partners will effectively be controlled by Family Holdings.

All shares of Common Stock subject to the LLC Agreement shall be voted as determined by the Symphony Partners board of directors, except in limited circumstances where the MSI shares will be voted in the same proportion as shares not owned by MSI are voted. At any annual or special meeting of Issuer's stockholders at which Board directors are to be elected, MSI and Family Holdings will take all necessary actions to cause their respective shares of Common Stock to be voted in favor of one (1) person designated by MSI to the Board, subject to review and approval by the Board's Nominating and Corporate Governance Committee pursuant to its customary policies and procedures, and at least two (2) persons designated by Family Holdings to the Board.

The foregoing descriptions of the Joint Filing Agreement, the Framework Agreement and the LLC Agreement do not purport to be complete and are subject to, and qualified in their entirety by, the text of such agreements, which are attached hereto as Exhibits 99.1 and 99.3 and incorporated herein by reference.

The responses set forth in Items 4 and 5 are incorporated by reference in their entirety. Except as otherwise described above, there are no contracts, arrangements, understandings or relationships among the Reporting Persons (or, to the best of such Reporting Person's knowledge, any other persons identified on Schedule A attached hereto with respect to the Reporting Persons), or between any Reporting Person (or, to the best of such Reporting Person's knowledge, any other person identified on Schedule A attached hereto with respect to such Reporting Person) and any other person with respect to any securities of the Issuer.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** WR Berkley & Others LLC

**Signature:** /s/ W. Robert Berkley, Jr.

**Name/Title:** W. Robert Berkley, Jr. /Manager

**Date:** 12/11/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** WR Berkley & Others 2 LLC

**Signature:** /s/ W. Robert Berkley, Jr.

**Name/Title:** W. Robert Berkley, Jr. / Manager

**Date:** 12/11/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** William R. Berkley

**Signature:** /s/ William R. Berkley

**Name/Title:** William R. Berkley

**Date:** 12/11/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Marjorie J. Berkley

**Signature:** /s/ Marjorie J. Berkley

**Name/Title:** Marjorie J. Berkley

**Date:** 12/11/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** W. Robert Berkley, Jr.

**Signature:** /s/ W. Robert Berkley, Jr.

**Name/Title:** W. Robert Berkley, Jr.

**Date:** 12/11/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** The William R. Berkley 2011 GST Trust u/a dated December 20, 2011

**Signature:** /s/ W. Robert Berkley, Jr.

**Name/Title:** W. Robert Berkley, Jr. /Trustee

**Date:** 12/11/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** The William R. Berkley 2022 Family Trust f/b/o William R. Berkley, Jr. and His Issue

**Signature:** /s/ Marjorie J. Berkley

**Name/Title:** Marjorie J. Berkley/Trustee

**Date:** 12/11/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** The William R. Berkley 2022 Family Trust f/b/o Lauren Berkley and Her Issue

**Signature:** /s/ Marjorie J. Berkley

**Name/Title:** Marjorie J. Berkley/Trustee

**Date:** 12/11/2025