Mason Hawkins - Southeastern Asset Management Inc
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    49
Portfolio value:    $2,032,773,449
Holdings Activity Buys Sells    History
Holding/activity history for  Aon Corporation (AON-W)
Period Shares % of Portfolio Activity % Change to Portfolio Reported Price Value Filing
2012   Q2 0 0.00 Sell 100.00% 6.40 SEC
2012   Q1 26,890,582 6.40 Add 17.18% 0.94 $49.06 $1,319,252,000 SEC
2011   Q4 22,948,782 5.66 Reduce 0.59% 0.03 $46.80 $1,074,003,000 SEC
2011   Q3 23,084,982 5.35 Add 3.63% 0.19 $41.98 $969,107,000 SEC
2011   Q2 22,276,582 5.32 Reduce 3.15% 0.18 $51.30 $1,142,788,000 SEC
2011   Q1 23,000,886 5.72 Reduce 0.98% 0.05 $52.96 $1,218,127,000 SEC
2010   Q4 23,228,886 5.20 Reduce 1.35% 0.07 $46.01 $1,068,761,000 SEC
2010   Q3 23,546,926 5.08 Add 7.85% 0.37 $39.11 $920,920,000 SEC
2010   Q2 21,833,526 5.03 Add 23.21% 0.95 $37.12 $810,461,000 SEC
2010   Q1 17,721,029 4.38 Add 28.31% 0.97 $42.71 $756,865,000 SEC
2009   Q4 13,811,118 3.11 Add 2.73% 0.08 $38.34 $529,518,000 SEC
2009   Q3 13,444,116 2.88 Add 2.83% 0.08 $40.69 $547,041,000 SEC
2009   Q2 13,073,716 2.98 Buy 2.98 $37.87 $495,102,000 SEC
2009   Q1 0 0.00 Sell 100.00% 0.05 SEC
2008   Q4 159,900 0.05 Reduce 98.86% 2.57 $45.68 $7,304,000 SEC
2008   Q3 13,988,209 2.60 Reduce 49.80% 2.25 $44.96 $628,910,000 SEC
2008   Q2 27,865,023 4.51 Reduce 5.46% 0.25 $45.94 $1,280,119,000 SEC
2008   Q1 29,475,523 4.54 Reduce 3.26% 0.17 $40.20 $1,184,916,000 SEC
2007   Q4 30,470,323 5.28 Reduce 21.78% 1.34 $47.69 $1,453,129,000 SEC
2007   Q3 38,952,700 6.16 Reduce 1.23% 0.08 $44.81 $1,745,470,000 SEC
2007   Q2 39,438,700 6.27 Reduce 0.67% 0.04 $42.61 $1,680,482,000 SEC
2007   Q1 39,704,700 6.32 Reduce 1.49% 0.09 $37.96 $1,507,190,000 SEC
2006   Q4 40,303,800 6.23 Reduce 0.55% 0.03 $35.34 $1,424,336,000 SEC
2006   Q3 40,524,800 6.16 Reduce 0.12% <0.01 $33.87 $1,372,575,000 SEC
2006   Q2 40,574,800 6.72 Reduce 1.35% 0.11 $34.82 $1,412,814,000 SEC
2006   Q1 41,129,600 7.79 Reduce 2.21% 0.15 $41.51 $1,707,290,000 SEC
2005   Q4 42,060,800 6.97 Reduce 3.36% 0.23 $35.95 $1,512,086,000 SEC
2005   Q3 43,522,007 6.76 Reduce 1.63% 0.10 $32.08 $1,396,186,000 SEC
2005   Q2 44,242,007 6.10 Reduce 2.60% 0.16 $25.04 $1,107,820,000 SEC
2005   Q1 45,422,007 6.25 Reduce 0.27% 0.02 $22.84 $1,037,439,000 SEC
2004   Q4 45,545,400 6.80 Reduce 0.05% <0.01 $23.86 $1,086,713,000 SEC
2004   Q3 45,570,400 8.83 Reduce 1.38% 0.13 $28.74 $1,309,693,000 SEC
2004   Q2 46,208,400 9.18 Add 2.26% 0.20 $28.47 $1,315,553,000 SEC
2004   Q1 45,189,300 8.84 Add 3.41% 0.29 $27.91 $1,261,233,000 SEC
2003   Q4 43,698,400 7.05 Add 15.01% 0.92 $23.94 $1,046,140,000 SEC
2003   Q3 37,994,100 5.64 Add 13.17% 0.66 $20.85 $792,177,000 SEC
2003   Q2 33,571,700 5.76 Add 9.73% 0.51 $24.08 $808,407,000 SEC
2003   Q1 30,595,100 5.24 Add 1.01% 0.05 $20.68 $632,707,000 SEC
2002   Q4 30,289,200 4.70 Add 39.85% 1.34 $18.89 $572,163,000 SEC
2002   Q3 21,658,800 3.99 Add 530.28% 3.36 $20.49 $443,789,000 SEC
2002   Q1 3,436,400 1.02 $35.00 $120,274,000 SEC
2001   Q4 3,436,400 1.06 Reduce 6.66% 0.10 $35.52 $122,061,000 SEC
2001   Q3 3,681,570 1.43 Reduce 5.80% 0.07 $42.00 $154,626,000 SEC
2001   Q2 3,908,070 1.18 Reduce 2.03% 0.02 $35.00 $136,782,000 SEC
2001   Q1 3,989,070 1.22 $35.50 $141,612,000 SEC
2000   Q4 3,989,070 1.11 Reduce 15.06% 0.25 $34.25 $136,626,000 SEC
2000   Q3 4,696,400 1.64 Reduce 23.35% 0.42 $39.25 $184,334,000 SEC
2000   Q2 6,127,200 1.78 Add 9.65% 0.16 $31.06 $190,326,000 SEC
2000   Q1 5,588,200 1.76 Buy 1.76 $32.25 $180,219,000 SEC