American Century Companies’s White Mountains Insurance WTM Stock Holding History

American Century Companies's WTM Position: Q2 2026 in Review

American Century Companies increased its White Mountains Insurance (WTM) stake by 274% in Q2 2026, buying an estimated $48.8M and bringing the position to 31,108 shares worth $64.5M. The position accounts for 0.03% of the portfolio, ranked #733.

American Century Companies first reported a position in WTM in Q1 2019 and has held it in 28 quarters since. 356 funds tracked by Wall St. Rank hold WTM as of Q2 2026.

• American Century Companies held 31,108 shares of White Mountains Insurance worth $64.5M as of Q2 2026.
• American Century Companies bought 22,800 White Mountains Insurance shares in Q2 2026, an estimated $48.8M.
• White Mountains Insurance made up 0.03% of American Century Companies's portfolio in Q2 2026, its #733 holding.
• American Century Companies first reported a position in White Mountains Insurance in Q1 2019 and has held it in 28 quarters since.
• 356 funds tracked by Wall St. Rank held White Mountains Insurance as of Q2 2026.

Based on American Century Companies's 13F filing for Q2 2026, filed 12 Aug 2026.