# EDGAR Filing Document

**Accession Number:** 0000918186
**File Stem:** 0001193125-26-092603
**Filing Date:** 2026-3
**Character Count:** 29247
**Document Hash:** a37cb3c6335857f485068cc2c60e322c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-092603.hdr.sgml**: 20260305

**ACCESSION NUMBER**: 0001193125-26-092603

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 2

**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:** 26724233

**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/A

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

### Attached PDF Documents

**Attachment 1:** `ck0000000000-ex99_3.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

**(Amendment No. 1)**

**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)*

**03/04/2026**

*(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>**25.51%** | Percent of class represented by amount in Row (11)<br>**25.51%** | |
| 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 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.

| **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>**25.51%** | Percent of class represented by amount in Row (11)<br>**25.51%** | |
| 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 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.

| **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>**25.51%** | Percent of class represented by amount in Row (11)<br>**25.51%** | |
| 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 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.

| **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>**25.51%** | Percent of class represented by amount in Row (11)<br>**25.51%** | |
| 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 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.

| **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>**25.51%** | Percent of class represented by amount in Row (11)<br>**25.51%** | |
| 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 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.

| **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>**25.51%** | Percent of class represented by amount in Row (11)<br>**25.51%** | |
| 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 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.

| **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>**25.51%** | Percent of class represented by amount in Row (11)<br>**25.51%** | |
| 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 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.

| **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>**25.51%** | Percent of class represented by amount in Row (11)<br>**25.51%** | |
| 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 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.

**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

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.

**Item 4. Purpose of Transaction**

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. Interest in Securities of the Issuer**

**(a)**
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.

**(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.**

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.

### 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:** 03/05/2026

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:** 03/05/2026

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:** 03/05/2026

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:** 03/05/2026

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:** 03/05/2026

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:** 03/05/2026

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:** 03/05/2026

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:** 03/05/2026