Companies / White Mountains Insurance Group Ltd / Activity
Activity — White Mountains Insurance Group Ltd
109 moves.
Top impactInsider · CEO movesInsider · biggest buysInsider · biggest sellsInstitution · biggest movesInstitution · new positions
| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | Norges Bank 13F manager | Exit | Common stock | $-66.88M | -32K -100.00% | 0 | high |
| Q1 2026 as of | Boston Partners 13F manager | Trim | Common stock | $-42.73M | -19K -25.29% | 57,459 2.41% of shares | medium |
| Q4 2025 as of | Bank of America Corp /De 13F manager | Trim | Common stock | $-20.79M | -10K -25.77% | 28,809 1.21% of shares | medium |
| Q1 2026 as of | Reinhart Partners, LLC. 13F manager | Trim | Common stock | $-14.50M | -7K -15.01% | 37,374 1.57% of shares | medium |
| Q1 2026 as of | Jeffrey L. Gendell 13F manager | Add | Common stock | $11.63M | +5K +16.28% | 37,814 1.58% of shares | medium |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common stock | $11.57M | +6K +4.97% | 117,871 4.94% of shares | medium |
| Q1 2026 as of | Victory Capital Management, Inc. 13F manager | Add | Common stock | $10.65M | +5K +77.02% | 11,145 0.47% of shares | medium |
| Q1 2026 as of | WCM Investment Management, LLC 13F manager | Trim | Common stock | $-10.28M | -5K -43.88% | 5,995 0.25% of shares | medium |
| Q1 2026 as of | Fuller & Thaler Asset Management, Inc. 13F manager | Trim | Common stock | $-7.93M | -4K -3.34% | 104,561 4.38% of shares | medium |
| Q1 2026 as of | BNP Paribas Financial Markets 13F manager | Add | Common stock | $7.21M | +3K +98.29% | 6,623 0.28% of shares | medium |
| Q1 2026 as of | AQR Capital Management, LLC 13F manager | Add | Common stock | $7.17M | +3K +72.88% | 7,738 0.32% of shares | medium |
| Q1 2026 as of | Marshall Wace, LLP 13F manager | Add | Common stock | $6.11M | +3K +253.19% | 3,878 0.16% of shares | medium |
| Q3 2025 as of | Barclays PLC 13F manager | Trim | Common stock | $-4.06M | -2K -71.86% | 952 0.04% of shares | low |
| Q1 2026 as of | London Co of Virginia 13F manager | Trim | Common stock | $-3.44M | -2K -2.67% | 57,131 2.39% of shares | low |
| Q1 2026 as of | First Trust Advisors LP 13F manager | Trim | Common stock | $-3.29M | -1K -32.86% | 3,058 0.13% of shares | low |
| Q1 2026 as of | Phocas Financial Corp. 13F manager | Trim | Common stock | $-2.63M | -1K -21.84% | 4,292 0.18% of shares | low |
| Q4 2025 as of | Norges Bank 13F manager | Add | Common stock | $2.52M | +1K +3.92% | 32,184 1.35% of shares | low |
| Q2 2026 as of | Mml Investors Services, LLC 13F manager | Trim | Common stock | $-2.48M | -1K -40.68% | 1,741 0.07% of shares | low |
| Q1 2026 as of | Brown Advisory Inc 13F manager | Trim | Common stock | $-2.44M | -1K -5.87% | 17,844 0.75% of shares | low |
| Q1 2026 as of | Renaissance Technologies LLC 13F manager | Add | Common stock | $2.44M | +1K +73.95% | 2,611 0.11% of shares | low |
| Q1 2026 as of | Arrowstreet Capital, Limited Partnership 13F manager | Add | Common stock | $2.42M | +1K +135.88% | 1,913 0.08% of shares | low |
| Q1 2025 as of | Barclays PLC 13F manager | Add | Common stock | $2.22M | +1K +53.83% | 3,295 0.14% of shares | low |
| Q4 2024 as of | Barclays PLC 13F manager | Add | Common stock | $1.93M | +991 +86.10% | 2,142 0.09% of shares | low |
| Q2 2026 as of | Main Street Financial Solutions, LLC 13F manager | Exit | Common stock | $-1.74M | -835 -100.00% | 0 | low |
| Q1 2026 as of | Hotchkis and Wiley Capital Management, LLC 13F manager | Trim | Common stock | $-1.55M | -704 -10.43% | 6,048 0.25% of shares | low |
| Q1 2026 as of | Amundi 13F manager | New | Common stock | $1.35M | +615 | 615 0.03% of shares | low |
| Q2 2026 as of | LPL Financial LLC 13F manager | Trim | Common stock | $-1.34M | -647 -32.93% | 1,318 0.06% of shares | low |
| Q1 2026 as of | Geode Capital Management, LLC 13F manager | Add | Common stock | $1.32M | +601 +1.45% | 42,119 1.76% of shares | low |
| Q2 2026 as of | AMG National Trust Bank 13F manager | Exit | Common stock | $-1.25M | -571 -100.00% | 0 | low |
| Q2 2026 as of | Quadrature Capital Ltd 13F manager | Add | Common stock | $1.03M | +499 +138.61% | 859 0.04% of shares | low |
| Q1 2026 as of | Millennium Management LLC 13F manager | Trim | Common stock | $-1.03M | -469 -54.79% | 387 0.02% of shares | low |
| Q3 2024 as of | Barclays PLC 13F manager | Add | Common stock | $985.5K | +581 +101.93% | 1,151 0.05% of shares | low |
| Q2 2026 as of | Victory Capital Management, Inc. 13F manager | Trim | Common stock | $-955.8K | -461 -4.14% | 10,684 0.45% of shares | low |
| Q1 2026 as of | California State Teachers Retirement System 13F manager | Add | Common stock | $944.7K | +430 +17.50% | 2,887 0.12% of shares | low |
| Q1 2026 as of | Bridgewater Associates, LP 13F manager | New | Common stock | $909.5K | +414 | 414 0.02% of shares | low |
| Q1 2026 as of | Bank of New York Mellon Corp/The 13F manager | Trim | Common stock | $-850.2K | -387 -4.38% | 8,444 0.35% of shares | low |
| Q2 2026 as of | State Street Corporation 13F manager | Trim | Common stock | $-841.8K | -406 -0.80% | 50,257 2.11% of shares | low |
| Q4 2025 as of | Barclays PLC 13F manager | Trim | Common stock | $-816.7K | -393 -41.28% | 559 0.02% of shares | low |
| Q2 2024 as of | Barclays PLC 13F manager | Trim | Common stock | $-794.2K | -437 -43.40% | 570 0.02% of shares | low |
| Q1 2026 as of | River Road Asset Management, LLC 13F manager | Trim | Common stock | $-793.1K | -361 -0.30% | 120,519 5.05% of shares | low |
| Q1 2026 as of | Natixis 13F manager | New | Common stock | $782.1K | +356 | 356 0.01% of shares | low |
| Q1 2026 as of | D. E. Shaw & Co., Inc. 13F manager | Add | Common stock | $696.4K | +317 +3.69% | 8,910 0.37% of shares | low |
| Q1 2026 as of | Agf Management Ltd 13F manager | Add | Common stock | $648.1K | +295 +20.95% | 1,703 0.07% of shares | low |
| Q1 2026 as of | Regions Financial Corp 13F manager | Trim | Common stock | $-604.2K | -275 -34.72% | 517 0.02% of shares | low |
| Q2 2025 as of | Sanctuary Advisors, LLC 13F manager | Trim | Common stock | $-585.1K | -326 -43.12% | 430 0.02% of shares | low |
| Q2 2023 as of | Barclays PLC 13F manager | Add | Common stock | $500.0K | +360 +49.93% | 1,081 0.05% of shares | low |
| Q1 2026 as of | Nicolet Bankshares Inc 13F manager | New | Common stock | $485.8K | +223 | 223 <0.01% of shares | low |
| Q1 2026 as of | Mariner, LLC 13F manager | Add | Common stock | $450.4K | +205 +51.00% | 607 0.03% of shares | low |
| Q2 2026 as of | Meeder Asset Management Inc 13F manager | New | Common stock | $449.9K | +217 | 217 <0.01% of shares | low |
| Q2 2026 as of | Deutsche Bank AG 13F manager | Add | Common stock | $393.9K | +190 +80.17% | 427 0.02% of shares | low |