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 | Harbor Capital Advisors, Inc. 13F manager | Add | Common stock | $382 | +174 +20.14% | 1,038 0.04% of shares | low |
| Q1 2026 as of | SG Americas Securities, LLC 13F manager | Add | Common stock | $297 | +135 +204.55% | 201 <0.01% of shares | low |
| Q2 2026 as of | SG Americas Securities, LLC 13F manager | Add | Common stock | $135 | +65 +32.34% | 266 0.01% of shares | low |
| Q1 2026 as of | Park Avenue Securities LLC 13F manager | Trim | Common stock | $-127 | -58 -7.62% | 703 0.03% of shares | low |
| Q2 2026 as of | Harbor Capital Advisors, Inc. 13F manager | Add | Common stock | $85 | +41 +3.95% | 1,079 0.05% of shares | low |
| Q2 2026 as of | Covestor Ltd 13F manager | Trim | Common stock | $-81 | -39 -40.21% | 58 <0.01% of shares | low |
| Q1 2026 as of | Janney Montgomery Scott LLC 13F manager | Add | Common stock | $61 | +28 +5.81% | 510 0.02% of shares | low |
| Q1 2026 as of | Bessemer Group Inc 13F manager | Trim | Common stock | $-15 | -7 -26.92% | 19 <0.01% of shares | low |
| Q1 2026 as of | Wedbush Securities Inc 13F manager | Trim | Common stock | $-2 | -1 -0.44% | 228 <0.01% of shares | low |