WTM

White Mountains Insurance Group Ltd

Company with tickers: WTM

CIK

776867

CUSIP

G9618E107

Shares Outstanding

2,476,670

Website

https://www.whitemountains.com

13F Activity (30d)

14 filings 10 filers

Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 3, 4 and 5. Form 4 must be filed within two business days of the trade.

Date	Insider	Role	Type	Shares	Price	Value	After
2026-05-21	SHANK SUZANNE F.	Director	Award	135	—	—	1,006
2026-05-21	Tanner David Allen	Director	Award	135	—	—	2,014
2026-05-21	Dillon Margaret	Director	Award	135	—	—	1,080
2026-05-21	Carlson Peter M	Director	Award	135	—	—	852
2026-05-21	CAMPBELL REID TARLTON	Director	Award	135	—	—	10,575
2026-05-21	CHOKSI MARY C	Director	Award	135	—	—	1,993
2026-05-21	Gelston Philip A	Director	Award	135	—	—	1,703
2026-05-21	Hicks Weston M	Director	Award	190	—	—	2,936
2026-05-21	Chu John	Director	Award	135	—	—	335
2026-03-19	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Gift	50	—	—	17,857
2026-03-04	Tanner David Allen	Director	Gift	225	—	—	1,879
2026-02-25	Harrison Giles E	President	Award	775	—	—	2,675
2026-02-25	Hildreth Michaela	MD & Chief Accounting Officer	Award	600	—	—	1,825
2026-02-25	Papamichael Michael A	Chief Financial Officer	Award	500	—	—	1,200
2026-02-25	Caffrey Liam P	Director, Chief Executive Officer	Award	1,500	—	—	3,650
2026-02-25	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Award	775	—	—	2,500
2026-01-01	Hildreth Michaela	MD & Chief Accounting Officer	Tax	274	$2,078.03	$569,380	2,491
2026-01-01	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Tax	398	$2,078.03	$827,056	17,907
2026-01-01	Caffrey Liam P	Director, Chief Executive Officer	Tax	425	$2,078.03	$883,163	1,655
2026-01-01	Papamichael Michael A	Chief Financial Officer	Tax	131	$2,078.03	$272,222	772
2025-12-23	Hildreth Michaela	MD & Chief Accounting Officer	Gift	60	—	—	2,165
2025-12-19	CAMPBELL REID TARLTON	Director	Sell	5,000	—	—	10,440
2025-12-19	Rountree George Manning	Director, Chief Executive Officer	Sell	5,000	$2,050.00	$10,250,000	13,809
2025-12-16	Gelston Philip A	Director	Sell	165	$2,048.51	$338,004	1,568
2025-11-25	CAMPBELL REID TARLTON	Director	Gift	50	—	—	15,440
2025-11-10	Tanner David Allen	Director	Gift	4	—	—	2,104
2025-05-22	Hicks Weston M	Director	Award	210	—	—	2,746
2025-05-22	Gelston Philip A	Director	Award	150	—	—	1,733
2025-05-22	SHANK SUZANNE F.	Director	Award	150	—	—	871
2025-05-22	Tanner David Allen	Director	Award	150	—	—	2,108
2025-05-22	CAMPBELL REID TARLTON	Director	Award	150	—	—	15,490
2025-05-22	Dillon Margaret	Director	Award	150	—	—	945
2025-05-22	Yi Steven	Director	Award	150	—	—	525
2025-05-22	CHOKSI MARY C	Director	Award	150	—	—	1,858
2025-05-22	Carlson Peter M	Director	Award	150	—	—	717
2025-02-26	Rountree George Manning	Director, Chief Executive Officer	Award	1,625	—	—	5,425
2025-02-26	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Award	825	—	—	2,725
2025-02-26	Harrison Giles E	President	Award	900	—	—	1,900
2025-02-26	Caffrey Liam P	Director, Chief Executive Officer	Award	1,025	—	—	3,400
2025-02-26	Hildreth Michaela	MD & Chief Accounting Officer	Award	625	—	—	1,825
2025-01-01	Caffrey Liam P	Director, Chief Executive Officer	Tax	420	$1,945.06	$816,925	830
2025-01-01	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Tax	496	$1,945.06	$964,750	17,305
2025-01-01	Hildreth Michaela	MD & Chief Accounting Officer	Tax	323	$1,945.06	$628,254	2,225
2025-01-01	Rountree George Manning	Director, Chief Executive Officer	Tax	1,067	$1,945.06	$2,075,379	18,809
2024-11-29	Hildreth Michaela	MD & Chief Accounting Officer	Gift	75	—	—	1,798
2024-06-10	Harrison Giles E	President	Award	1,000	—	—	1,000
2024-05-23	Tanner David Allen	Director	Award	165	—	—	1,958
2024-05-23	Hicks Weston M	Director	Award	230	—	—	2,536
2024-05-23	CAMPBELL REID TARLTON	Director	Award	165	—	—	15,340
2024-05-23	Dillon Margaret	Director	Award	165	—	—	795

Showing 1–50 of 151 transactions