重大事件即時報告 8-K 2026-05-21

White Mountains Insurance Group, Ltd.（百慕達註冊）於2026年5月21日提交8‑K申報，披露兩項主要事項：

AI 繁中摘要

White Mountains Insurance Group, Ltd.（百慕達註冊）於2026年5月21日提交8‑K申報，披露兩項主要事項：

1. **董事離任**：Steven M. Yi 先生未有參與2026年重選，其董事任期已於2026年5月21日屆滿，正式退任。

2. **2026年度股東大會投票結果** 📊  
大會於百慕達哈密爾頓教區舉行。截至記錄日（2026年3月30日），已發行及合資格投票的普通股共2,476,670股。重點決議如下：

- **選舉Class II董事（任期至2029年）**：四位候選人全部獲通過：  
  - Liam P. Caffrey：2,003,323票贊成、28,706票反對、2,289票棄權  
  - Mary C. Choksi：1,920,050票贊成、112,006票反對、2,262票棄權  
  - John K. Chu：2,001,736票贊成、29,856票反對、2,726票棄權  
  - Weston M. Hicks：1,863,978票贊成、167,615票反對、2,725票棄權  
  四項均有約223,336票為經紀人未投票。

- **高管薪酬諮詢決議**：以98%贊成票（1,993,894票）通過，反對36,706票，棄權3,718票。

- **委任核數師**：正式批准PricewaterhouseCoopers LLP為2026財政年度獨立註冊會計師事務所，投票結果為2,186,203票贊成、69,271票反對、2,180票棄權。

**對投資者的影響** 🎯：  
- 董事會組成變動屬正常換屆，未引發重大治理疑慮。  
- 高管薪酬方案獲絕大多數股東支持，反映整體薪酬安排與股東利益一致。  
- 核數師續聘有助維持財務報告的連續性與獨立性。  
整體而言，文件未涉及財務業績或重大企業行動，對股價的直接影響有限。投資者可關注公司未來季度業績及業務更新。

展開英文正文

wtm-20260521FALSE0000776867Bermuda1-899394-270845503755☐☐☐☐☐00007768672026-05-212026-05-21

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

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

May 21, 2026
Date of Report (Date of earliest event reported)

WHITE MOUNTAINS INSURANCE GROUP, LTD.
(Exact name of registrant as specified in its charter)

Bermuda
(State or other jurisdiction of
incorporation or organization)
1-8993
(Commission file number)
94-2708455
(I.R.S. Employer Identification No.)

23 South Main Street, Suite 3B, Hanover, New Hampshire 03755
(Address of principal executive offices)

(603) 640-2200
(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Shares, par value $1.00 per shareWTMNew York Stock Exchange
WTM.BHBermuda Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933(§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

ITEM 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Mr. Steven M. Yi did not stand for re-election in 2026 as a director of White Mountains Insurance Group, Ltd. (the “Company”) and completed his tenure as a member of the Board of Directors of the Company on May 21, 2026 at the conclusion of his term.

ITEM 5.07 Submission of Matters to a Vote of Security Holders.

The Company held its 2026 Annual General Meeting of Members (the “2026 Annual Meeting”) on May 21, 2026 in Hamilton Parish, Bermuda.

As of March 30, 2026, the record date for the 2026 Annual Meeting, a total of 2,476,670 common shares were outstanding and eligible to vote. The results are presented below.

Proposal 1 - Election of Class II Directors to a term ending in 2029:

Nominee:Votes FORVotes AgainstAbstainedBroker
Non-votes
Liam P. Caffrey2,003,323 28,706 2,289 223,336
Mary C. Choksi1,920,050 112,006 2,262 223,336
John K. Chu2,001,736 29,856 2,726 223,336
Weston M. Hicks1,863,978 167,615 2,725 223,336

Proposal 2 - Approval of the advisory resolution on executive compensation.

Votes FOR Votes AgainstAbstainedBroker
Non-votes
1,993,894 (98%)36,706 3,718 223,336

Proposal 3 - Approval of the appointment of PricewaterhouseCoopers LLP as the Company's Independent Registered Public Accounting Firm for 2026.

Votes FOR Votes AgainstAbstained
2,186,203 69,271 2,180

ITEM 9.01 Financial Statements and Exhibits.

(d) Exhibits.

104 Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document)
2

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

WHITE MOUNTAINS INSURANCE GROUP, LTD.
May 21, 2026By:/s/ MICHAELA J. HILDRETH
Michaela J. Hildreth
Managing Director and
Chief Accounting Officer