Boston Partners’s Aon AON Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $631M | Buy |
1,955,032
+320,025
| +20% | +$106M | 0.66% | 42 |
|
|
2025
Q4 | $576M | Sell |
1,635,007
-76,243
| -4% | -$26.6M | 0.6% | 48 |
|
|
2025
Q3 | $611M | Buy |
1,711,250
+230,098
| +16% | +$83.2M | 0.63% | 46 |
|
|
2025
Q2 | $529M | Sell |
1,481,152
-640,455
| -30% | -$232M | 0.59% | 53 |
|
|
2025
Q1 | $845M | Buy |
2,121,607
+85,609
| +4% | +$32.8M | 1.02% | 15 |
|
|
2024
Q4 | $732M | Buy |
2,035,998
+244,706
| +14% | +$90M | 0.89% | 19 |
|
|
2024
Q3 | $620M | Buy |
1,791,292
+447,218
| +33% | +$146M | 0.73% | 31 |
|
|
2024
Q2 | $395M | Buy |
1,344,074
+359,629
| +37% | +$106M | 0.49% | 64 |
|
|
2024
Q1 | $327M | Buy |
984,445
+343,635
| +54% | +$107M | 0.39% | 94 |
|
|
2023
Q4 | $187M | Sell |
640,810
-571,333
| -47% | -$183M | 0.25% | 146 |
|
|
2023
Q3 | $393M | Sell |
1,212,143
-304,765
| -20% | -$101M | 0.54% | 60 |
|
|
2023
Q2 | $523M | Sell |
1,516,908
-15,237
| -1% | -$4.95M | 0.7% | 35 |
|
|
2023
Q1 | $483M | Buy |
1,532,145
+489,752
| +47% | +$152M | 0.66% | 45 |
|
|
2022
Q4 | $313M | Sell |
1,042,393
-82,546
| -7% | -$24.1M | 0.42% | 84 |
|
|
2022
Q3 | $301M | Buy |
1,124,939
+36,970
| +3% | +$10.5M | 0.44% | 77 |
|
|
2022
Q2 | $293M | Buy |
1,087,969
+103,745
| +11% | +$29.8M | 0.41% | 83 |
|
|
2022
Q1 | $321M | Buy |
984,224
+22,506
| +2% | +$6.55M | 0.39% | 85 |
|
|
2021
Q4 | $289M | Sell |
961,718
-21,508
| -2% | -$6.45M | 0.35% | 96 |
|
|
2021
Q3 | $281M | Buy |
983,226
+30,004
| +3% | +$8.06M | 0.36% | 95 |
|
|
2021
Q2 | $228M | Buy |
953,222
+22,461
| +2% | +$5.49M | 0.29% | 118 |
|
|
2021
Q1 | $214M | Sell |
930,761
-16,549
| -2% | -$3.64M | 0.29% | 115 |
|
|
2020
Q4 | $200M | Sell |
947,310
-161,289
| -15% | -$32.9M | 0.31% | 102 |
|
|
2020
Q3 | $229M | Buy |
1,108,599
+2,016
| +0.2% | +$403K | 0.42% | 80 |
|
|
2020
Q2 | $213M | Sell |
1,106,583
-454,886
| -29% | -$84.8M | 0.39% | 82 |
|
|
2020
Q1 | $258M | Sell |
1,561,469
-714,947
| -31% | -$146M | 0.51% | 67 |
|
|
2019
Q4 | $474M | Sell |
2,276,416
-752,942
| -25% | -$149M | 0.63% | 51 |
|
|
2019
Q3 | $586M | Sell |
3,029,358
-870,928
| -22% | -$168M | 0.79% | 30 |
|
|
2019
Q2 | $753M | Sell |
3,900,286
-262,064
| -6% | -$47.5M | 0.99% | 19 |
|
|
2019
Q1 | $711M | Buy |
4,162,350
+528,189
| +15% | +$85.6M | 0.94% | 24 |
|
|
2018
Q4 | $528M | Buy |
3,634,161
+907,862
| +33% | +$141M | 0.76% | 36 |
|
|
2018
Q3 | $419M | Buy |
2,726,299
+127,761
| +5% | +$18.7M | 0.49% | 63 |
|
|
2018
Q2 | $356M | Buy |
2,598,538
+45,026
| +2% | +$6.34M | 0.43% | 75 |
|
|
2018
Q1 | $358M | Buy |
2,553,512
+51,135
| +2% | +$7.16M | 0.43% | 77 |
|
|
2017
Q4 | $335M | Sell |
2,502,377
-460,114
| -16% | -$65.5M | 0.4% | 84 |
|
|
2017
Q3 | $433M | Sell |
2,962,491
-104,193
| -3% | -$14.5M | 0.53% | 55 |
|
|
2017
Q2 | $408M | Buy |
3,066,684
+39,993
| +1% | +$5.06M | 0.52% | 64 |
|
|
2017
Q1 | $359M | Sell |
3,026,691
-540,951
| -15% | -$62.4M | 0.46% | 74 |
|
|
2016
Q4 | $398M | Sell |
3,567,642
-2,136,544
| -37% | -$238M | 0.52% | 57 |
|
|
2016
Q3 | $642M | Buy |
5,704,186
+135,896
| +2% | +$15M | 0.9% | 22 |
|
|
2016
Q2 | $608M | Sell |
5,568,290
-241,265
| -4% | -$25.5M | 0.88% | 21 |
|
|
2016
Q1 | $607M | Buy |
5,809,555
+2,016
| +0% | +$189K | 0.89% | 24 |
|
|
2015
Q4 | $536M | Buy |
5,807,539
+32,428
| +0.6% | +$3.02M | 0.77% | 31 |
|
|
2015
Q3 | $512M | Buy |
5,775,111
+240,373
| +4% | +$23.3M | 0.78% | 33 |
|
|
2015
Q2 | $552M | Buy |
5,534,738
+936,627
| +20% | +$93.7M | 0.79% | 33 |
|
|
2015
Q1 | $442M | Buy |
4,598,111
+635,843
| +16% | +$61.5M | 0.66% | 40 |
|
|
2014
Q4 | $376M | Buy |
+3,962,268
| New | +$354M | 0.56% | 50 |
|
|
2014
Q1 | – | Sell |
-68,055
| Closed | -$5.71M | – | 717 |
|
|
2013
Q4 | $5.71M | Hold |
68,055
| – | – | 0.01% | 487 |
|
|
2013
Q3 | $5.07M | Sell |
68,055
-19,470
| -22% | -$1.34M | 0.01% | 486 |
|
|
2013
Q2 | $5.63M | Buy |
+87,525
| New | +$5.55M | 0.02% | 439 |
|
Other funds holding AON
VCM
VPM
Boston Partners's AON Position: Q1 2026 in Review
Boston Partners increased its Aon (AON) stake by 20% in Q1 2026, buying an estimated $106M and bringing the position to 1,955,032 shares worth $631M. The position accounts for 0.66% of the portfolio, ranked #42.
Boston Partners first reported a position in AON in Q2 2013 and has held it in 49 quarters since. The position peaked at $845M in Q1 2025. 1,252 funds tracked by Wall St. Rank hold AON as of Q1 2026.
- Boston Partners held 1,955,032 shares of Aon worth $631M as of Q1 2026.
- Boston Partners bought 320,025 Aon shares in Q1 2026, an estimated $106M.
- Aon made up 0.66% of Boston Partners's portfolio in Q1 2026, its #42 holding.
- Boston Partners first reported a position in Aon in Q2 2013 and has held it in 49 quarters since.
- Boston Partners's Aon position peaked at $845M in Q1 2025.
- 1,252 funds tracked by Wall St. Rank held Aon as of Q1 2026.
Based on Boston Partners's 13F filing for Q1 2026, filed 11 May 2026.