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XTX Topco’s Aon AON Stock Holding History

XTX Topco’s Portfolio AON Stock Details AON Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-3,558
Closed -$1.27M – 3288
2025
Q3 		$1.27M Buy
+3,558
New +$1.29M 0.07% 431
2024
Q3 		– Sell
-1,660
Closed -$487K – 2061
2024
Q2 		$487K Sell
1,660
-3,046
-65% -$901K 0.04% 672
2024
Q1 		$1.57M Buy
+4,706
New +$1.46M 0.21% 58
2023
Q4 		– Sell
-4,857
Closed -$1.57M – 1560
2023
Q3 		$1.57M Buy
+4,857
New +$1.61M 0.27% 26
2023
Q2 		– Sell
-2,433
Closed -$767K – 1394
2023
Q1 		$767K Buy
2,433
+151
+7% +$46.7K 0.16% 107
2022
Q4 		$685K Buy
+2,282
New +$667K 0.15% 181
2022
Q3 		– Sell
-2,253
Closed -$608K – 1085
2022
Q2 		$608K Buy
+2,253
New +$648K 0.25% 89
2021
Q3 		– Sell
-848
Closed -$202K – 674
2021
Q2 		$202K Buy
+848
New +$207K 0.07% 556

Other funds holding AON

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
Dodge & Cox
Dodge & Cox San Francisco, California $191B AUM 17.5% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Berkshire Hathaway
Berkshire Hathaway Omaha, Nebraska $299B AUM 27.55% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

XTX Topco's AON Position: Q4 2025 in Review

XTX Topco sold out of Aon (AON) in Q4 2025, closing a stake of 3,558 shares — an estimated $1.27M sold.

XTX Topco first reported a position in AON in Q2 2021 and held it in 8 quarters. The position peaked at $1.57M in Q3 2023. 1,282 funds tracked by Wall St. Rank hold AON as of Q4 2025.

  • XTX Topco reported no remaining Aon position as of Q4 2025 after selling out during the quarter.
  • XTX Topco sold 3,558 Aon shares in Q4 2025, an estimated $1.27M.
  • XTX Topco first reported a position in Aon in Q2 2021 and held it in 8 quarters.
  • XTX Topco's Aon position peaked at $1.57M in Q3 2023.
  • 1,282 funds tracked by Wall St. Rank held Aon as of Q4 2025.

Based on XTX Topco's 13F filing for Q4 2025, filed 17 Feb 2026.