Stocks
WTM WHITE MOUNTAINS INSURANCE GROUP LTD

WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Company with tickers: WTM

CIK

776867

Shares Outstanding

2,467,055

Price Holdings Short Volume Short Interest Fails to Deliver SEC Filings Earnings Calls Insider Trading Congress Trades

Date	Insider	Role	Type	Shares	Price	Value	After
2026-03-19	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	4	—	—	4
2026-03-19	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Gift	50	—	—	17,857
2026-03-19	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	2,500	—	—	2,500
2026-03-04	Tanner David Allen	Director	Gift	225	—	—	1,879
2026-02-25	Caffrey Liam P	Director, Chief Executive Officer	Other	1,655	—	—	1,655
2026-02-25	Caffrey Liam P	Director, Chief Executive Officer	Award	1,500	—	—	3,650
2026-02-25	Harrison Giles E	President	Other	2	—	—	2
2026-02-25	Harrison Giles E	President	Award	775	—	—	2,675
2026-02-25	Hildreth Michaela	MD & Chief Accounting Officer	Other	2,491	—	—	2,491
2026-02-25	Hildreth Michaela	MD & Chief Accounting Officer	Award	600	—	—	1,825
2026-02-25	Papamichael Michael A	Chief Financial Officer	Other	772	—	—	772
2026-02-25	Papamichael Michael A	Chief Financial Officer	Award	500	—	—	1,200
2026-02-25	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Award	775	—	—	2,500
2026-02-25	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	17,907	—	—	17,907
2026-01-01	Hildreth Michaela	MD & Chief Accounting Officer	Other	20	—	—	20
2026-01-01	Hildreth Michaela	MD & Chief Accounting Officer	Other	1,225	—	—	1,225
2026-01-01	Hildreth Michaela	MD & Chief Accounting Officer	Tax	274	$2,078.03	$569,380	2,491
2026-01-01	Papamichael Michael A	Chief Financial Officer	Other	12	—	—	12
2026-01-01	Papamichael Michael A	Chief Financial Officer	Other	700	—	—	700
2026-01-01	Papamichael Michael A	Chief Financial Officer	Tax	131	$2,078.03	$272,222	772
2026-01-01	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	1,725	—	—	1,725
2026-01-01	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Tax	398	$2,078.03	$827,056	17,907
2026-01-01	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	4	—	—	4
2026-01-01	Caffrey Liam P	Director, Chief Executive Officer	Tax	425	$2,078.03	$883,163	1,655
2026-01-01	Caffrey Liam P	Director, Chief Executive Officer	Other	2,150	—	—	2,150
2026-01-01	Caffrey Liam P	Director, Chief Executive Officer	Other	8	—	—	8
2026-01-01	Papamichael Michael A	Chief Financial Officer	Other	503	—	—	503
2026-01-01	Papamichael Michael A	Chief Financial Officer	Other	1,100	—	—	1,100
2025-12-23	Hildreth Michaela	MD & Chief Accounting Officer	Other	20	—	—	20
2025-12-23	Hildreth Michaela	MD & Chief Accounting Officer	Other	1,825	—	—	1,825
2025-12-23	Hildreth Michaela	MD & Chief Accounting Officer	Gift	60	—	—	2,165
2025-12-19	Rountree George Manning	Director, Chief Executive Officer	Sell	5,000	$2,050.00	$10,250,000	13,809
2025-12-19	Rountree George Manning	Director, Chief Executive Officer	Other	122	—	—	122
2025-12-19	Rountree George Manning	Director, Chief Executive Officer	Other	5,425	—	—	5,425
2025-12-19	CAMPBELL REID TARLTON	Director	Other	119	—	—	119
2025-12-19	CAMPBELL REID TARLTON	Director	Sell	5,000	—	—	10,440
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
2025-11-25	CAMPBELL REID TARLTON	Director	Other	119	—	—	119
2025-11-10	Tanner David Allen	Director	Gift	4	—	—	2,104
2025-05-22	Yi Steven	Director	Award	150	—	—	525
2025-05-22	Tanner David Allen	Director	Award	150	—	—	2,108
2025-05-22	CHOKSI MARY C	Director	Award	150	—	—	1,858
2025-05-22	Carlson Peter M	Director	Award	150	—	—	717
2025-05-22	CAMPBELL REID TARLTON	Director	Award	150	—	—	15,490
2025-05-22	CAMPBELL REID TARLTON	Director	Other	119	—	—	119
2025-05-22	SHANK SUZANNE F.	Director	Award	150	—	—	871
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	Dillon Margaret	Director	Award	150	—	—	945
2025-02-26	Rountree George Manning	Director, Chief Executive Officer	Other	18,809	—	—	18,809
2025-02-26	Rountree George Manning	Director, Chief Executive Officer	Award	1,625	—	—	5,425
2025-02-26	Caffrey Liam P	Director, Chief Executive Officer	Other	830	—	—	830
2025-02-26	Caffrey Liam P	Director, Chief Executive Officer	Award	1,025	—	—	3,400
2025-02-26	Harrison Giles E	President	Award	900	—	—	1,900
2025-02-26	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Award	825	—	—	2,725
2025-02-26	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	17,305	—	—	17,305
2025-02-26	Hildreth Michaela	MD & Chief Accounting Officer	Award	625	—	—	1,825
2025-02-26	Hildreth Michaela	MD & Chief Accounting Officer	Other	2,225	—	—	2,225
2025-01-01	Rountree George Manning	Director, Chief Executive Officer	Other	120	—	—	120
2025-01-01	Rountree George Manning	Director, Chief Executive Officer	Other	3,800	—	—	3,800
2025-01-01	Rountree George Manning	Director, Chief Executive Officer	Tax	1,067	$1,945.06	$2,075,379	18,809
2025-01-01	Caffrey Liam P	Director, Chief Executive Officer	Tax	420	$1,945.06	$816,925	830
2025-01-01	Caffrey Liam P	Director, Chief Executive Officer	Other	2,375	—	—	2,375
2025-01-01	Caffrey Liam P	Director, Chief Executive Officer	Other	6	—	—	6
2025-01-01	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	1,900	—	—	1,900
2025-01-01	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	4	—	—	4
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	Other	18	—	—	18
2025-01-01	Hildreth Michaela	MD & Chief Accounting Officer	Other	1,200	—	—	1,200
2025-01-01	Hildreth Michaela	MD & Chief Accounting Officer	Tax	323	$1,945.06	$628,254	2,225
2024-11-29	Hildreth Michaela	MD & Chief Accounting Officer	Other	1,950	—	—	1,950
2024-11-29	Hildreth Michaela	MD & Chief Accounting Officer	Other	18	—	—	18
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
2024-06-10	Harrison Giles E	President	Other	0	—	—	0
2024-05-23	Gelston Philip A	Director	Award	165	—	—	1,583
2024-05-23	Dillon Margaret	Director	Award	165	—	—	795
2024-05-23	CHOKSI MARY C	Director	Award	165	—	—	1,708
2024-05-23	Carlson Peter M	Director	Award	165	—	—	1,133
2024-05-23	CAMPBELL REID TARLTON	Director	Award	165	—	—	15,340
2024-05-23	CAMPBELL REID TARLTON	Director	Other	119	—	—	119
2024-05-23	Hicks Weston M	Director	Award	230	—	—	2,536
2024-05-23	Yi Steven	Director	Award	165	—	—	375
2024-05-23	Tanner David Allen	Director	Award	165	—	—	1,958
2024-05-23	SHANK SUZANNE F.	Director	Award	165	—	—	721
2024-05-07	WHITE MOUNTAINS INSURANCE GROUP LTD	10% Owner	Sell	5,000,200	$19.00	$95,003,800	17,856,614
2024-03-21	CAMPBELL REID TARLTON	Director	Gift	55	—	—	15,175
2024-03-21	CAMPBELL REID TARLTON	Director	Other	119	—	—	119
2024-02-22	Rountree George Manning	Director, Chief Executive Officer	Award	1,800	—	—	6,500
2024-02-22	Rountree George Manning	Director, Chief Executive Officer	Other	17,176	—	—	17,176
2024-02-22	Caffrey Liam P	Director, Chief Executive Officer	Other	3	—	—	3
2024-02-22	Caffrey Liam P	Director, Chief Executive Officer	Award	1,125	—	—	3,625
2024-02-22	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Other	16,551	—	—	16,551
2024-02-22	SEELIG ROBERT LAWRENCE	EVP & General Counsel	Award	900	—	—	3,150
2024-02-22	Hildreth Michaela	MD & Chief Accounting Officer	Award	600	—	—	1,950
2024-02-22	Hildreth Michaela	MD & Chief Accounting Officer	Other	1,873	—	—	1,873
2024-02-22	CAMPBELL REID TARLTON	Director	Award	45	—	—	15,230
2024-02-22	CAMPBELL REID TARLTON	Director	Other	116	—	—	116
2024-01-01	Rountree George Manning	Director, Chief Executive Officer	Other	117	—	—	117