White Mountains (NYSE: WTM) director discloses holding no common shares

Rhea-AI Filing Summary

WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) had director Stephen Klar file an initial statement of beneficial ownership on Form 3. The filing reports that he beneficially owns no Common Shares of WTM, with 0 shares shown as directly owned following the reported holdings entry.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Klar Stephen

Role Director

Type	Security	Shares	Price	Value
holding	Common Shares	--	--	--

Holdings After Transaction: Common Shares — 0 shares (Direct)

Key Figures

Common Shares beneficially owned after reported holdings: 0.0000 shares

1 metrics

Common Shares beneficially owned after reported holdings 0.0000 shares Total Common Shares directly owned by Stephen Klar following the Form 3 holdings entry

FAQ

What does Stephen Klar's Form 3 filing mean for WTM?

The Form 3 shows that director Stephen Klar currently reports 0 Common Shares of WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) as beneficially owned. It establishes his baseline ownership position as a director for future insider ownership and trading disclosures.

How many WTM shares does Stephen Klar report owning on this Form 3?

Stephen Klar reports owning 0 Common Shares of WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) following the reported holdings entry. The filing lists a total of 0.0000 shares directly owned after the transaction line.

Is the Form 3 for WTM a buy or sell transaction?

The Form 3 for WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) does not report any buy or sell transaction. It is an initial holdings entry showing that director Stephen Klar has 0 Common Shares beneficially owned as his starting position.

What type of security is reported in Stephen Klar’s WTM Form 3?

The Form 3 for WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) reports holdings in Common Shares. For this filing, director Stephen Klar reports a total of 0 Common Shares beneficially owned following the reported entry.

Does the WTM Form 3 indicate any indirect ownership by Stephen Klar?

No. The Form 3 shows the ownership type as direct with total shares following the transaction of 0.0000. There is no indication of indirect holdings or ownership through another entity in this filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/27/2026 - 03:40 PM Accepted by SEC EDGAR 08/27/2026 - 03:39 PM Learn about SEC filing dates

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Klar Stephen

(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. Date of Event Requiring Statement (Month/Day/Year)
08/26/2026

3. Issuer Name and Ticker or Trading Symbol
WHITE MOUNTAINS INSURANCE GROUP LTD [ WTM ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Shares	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	Wesley C. Bell, Attorney-in-Fact for Stephen Klar	08/27/2026
	** Signature of Reporting Person	Date
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 5 (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 3: SEC 1473 (03-26)