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  4. [Form 4] WHITE MOUNTAINS INSURANCE GROUP LTD Insider Trading Activity

WHITE MOUNTAINS (WTM) director granted 135 Common Shares as annual award

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

SHANK SUZANNE F. reported acquisition or exercise transactions in this Form 4 filing.

WHITE MOUNTAINS INSURANCE GROUP LTD director Suzanne F. Shank received an annual director share award of 135 Common Shares on May 21, 2026. The grant was at a stated price of $0.00 per share and increased her direct holdings to 1,006 Common Shares.

Positive

  • None.

Negative

  • None.
Insider SHANK SUZANNE F.
Role null
Type Security Shares Price Value
Grant/Award Common Shares 135 $0.00 --
Holdings After Transaction: Common Shares — 1,006 shares (Direct, null)
Footnotes (1)
  1. [object Object]
Shares granted 135 Common Shares Annual Director Share Award on May 21, 2026
Grant price per share $0.00 per share Director share award classification as compensation
Shares owned after transaction 1,006 Common Shares Direct holdings following the award
Transaction date May 21, 2026 Date of annual director share award
Annual Director Share Award financial
"Footnote describes the transaction as an "Annual Director Share Award"."
Common Shares financial
"The security title for the transaction is listed as "Common Shares"."
Common shares are the basic units of ownership in a company that give holders a claim on profits and a right to vote on key matters, like electing the board. Think of them as membership cards in a club: they let you share in successes and losses, but in a bankruptcy or liquidation they are paid after creditors and preferred shareholders, so their value can swing more and matters for assessing risk and potential return.
Grant, award, or other acquisition financial
"The transaction code description states "Grant, award, or other acquisition"."
Form 4 regulatory
"INSIDER FILING DATA (Form 4) describes this insider equity award."
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
SHANK SUZANNE F.
(Last)(First)(Middle)
C/O WHITE MOUNTAINS INSURANCE GROUP, LTD
23 SOUTH MAIN STREET, SUITE 3B
(Street)
HANOVER NEW HAMPSHIRE 03755
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
WHITE MOUNTAINS INSURANCE GROUP LTD [ WTM ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Shares05/21/2026A135(1)A$01,006D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Annual Director Share Award
Wesley C. Bell, by Power of Attorney05/21/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did WTM director Suzanne F. Shank report?

Suzanne F. Shank reported receiving an annual director share award of 135 Common Shares. The grant was recorded at a price of $0.00 per share, reflecting compensation rather than a market purchase, and increased her direct ownership stake in WHITE MOUNTAINS INSURANCE GROUP LTD.

How many WHITE MOUNTAINS (WTM) shares does Suzanne F. Shank now hold?

After the reported grant, Suzanne F. Shank holds 1,006 Common Shares directly. This total includes the 135-share annual director award granted on May 21, 2026, as disclosed in the Form 4 insider transaction filing for WHITE MOUNTAINS INSURANCE GROUP LTD.

Was the WTM insider transaction by Suzanne F. Shank a market purchase or sale?

The transaction was not a market purchase or sale. It was classified as a grant, award, or other acquisition of 135 Common Shares at $0.00 per share, described as an Annual Director Share Award, reflecting routine equity compensation for board service.

What does transaction code 'A' mean in the WTM Form 4 for Suzanne F. Shank?

Transaction code "A" on this Form 4 indicates a grant, award, or other acquisition of securities. For Suzanne F. Shank, it represents an Annual Director Share Award of 135 Common Shares, a routine compensation-related issuance rather than an open-market trade in WHITE MOUNTAINS shares.

Does the WTM Form 4 show any share sales by Suzanne F. Shank?

No share sales are shown for Suzanne F. Shank in this filing. The Form 4 reports only an acquisition of 135 Common Shares as an Annual Director Share Award, raising her direct holdings to 1,006 shares in WHITE MOUNTAINS INSURANCE GROUP LTD.