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Quantinno Capital Management’s White Mountains Insurance WTM Stock Holding History

Quantinno Capital Management’s Portfolio WTM Stock Details WTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$26.2M Buy
12,624
+2,840
+29% +$6.08M 0.03% 617
2026
Q1 		$21.5M Buy
9,784
+2,513
+35% +$5.38M 0.04% 589
2025
Q4 		$15.1M Buy
7,271
+1,217
+20% +$2.38M 0.03% 625
2025
Q3 		$10.1M Buy
6,054
+1,764
+41% +$3.15M 0.03% 664
2025
Q2 		$7.7M Sell
4,290
-316
-7% -$562K 0.03% 641
2025
Q1 		$8.87M Buy
4,606
+2,562
+125% +$4.82M 0.06% 417
2024
Q4 		$3.98M Buy
2,044
+554
+37% +$1.05M 0.04% 579
2024
Q3 		$2.53M Buy
1,490
+163
+12% +$284K 0.03% 633
2024
Q2 		$2.41M Buy
1,327
+81
+7% +$143K 0.04% 511
2024
Q1 		$2.24M Buy
1,246
+97
+8% +$163K 0.05% 478
2023
Q4 		$1.73M Buy
1,149
+86
+8% +$128K 0.06% 432
2023
Q3 		$1.59M Buy
1,063
+110
+12% +$169K 0.07% 368
2023
Q2 		$1.32M Buy
953
+185
+24% +$260K 0.08% 344
2023
Q1 		$1.06M Buy
768
+329
+75% +$472K 0.07% 359
2022
Q4 		$621K Buy
439
+1
+0.2% +$1.35K 0.05% 470
2022
Q3 		$571K Sell
438
-31
-7% -$40.1K 0.07% 336
2022
Q2 		$584K Buy
+469
New +$545K 0.08% 301
2019
Q1 		– Sell
-500
Closed -$429K – 483
2018
Q4 		$429K Buy
+500
New +$446K 0.35% 90

Other funds holding WTM

Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RRAM
River Road Asset Management Louisville, Kentucky $8.99B AUM 12.83% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
CB
Cooke & Bieler Philadelphia, Pennsylvania $8.65B AUM 9.66% 1-Year Est. Return
WCM
Wallace Capital Management Dallas, Texas $912M AUM 21.45% 1-Year Est. Return
FMI
Fiduciary Management Inc Milwaukee, Wisconsin $7.03B AUM 11.68% 1-Year Est. Return

Quantinno Capital Management's WTM Position: Q2 2026 in Review

Quantinno Capital Management increased its White Mountains Insurance (WTM) stake by 29% in Q2 2026, buying an estimated $6.08M and bringing the position to 12,624 shares worth $26.2M. The position accounts for 0.03% of the portfolio, ranked #617.

Quantinno Capital Management first reported a position in WTM in Q4 2018 and has held it in 18 quarters since. 356 funds tracked by Wall St. Rank hold WTM as of Q2 2026.

  • Quantinno Capital Management held 12,624 shares of White Mountains Insurance worth $26.2M as of Q2 2026.
  • Quantinno Capital Management bought 2,840 White Mountains Insurance shares in Q2 2026, an estimated $6.08M.
  • White Mountains Insurance made up 0.03% of Quantinno Capital Management's portfolio in Q2 2026, its #617 holding.
  • Quantinno Capital Management first reported a position in White Mountains Insurance in Q4 2018 and has held it in 18 quarters since.
  • 356 funds tracked by Wall St. Rank held White Mountains Insurance as of Q2 2026.

Based on Quantinno Capital Management's 13F filing for Q2 2026, filed 13 Aug 2026.