Arthur J. Gallagher & Co. historical data
| Date | Open | High | Low | Close | Adj. close | Volume |
| 2010-05-12 | 25.420 | 25.540 | 25.140 | 25.460 | 17.135 | 508,400 |
| 2010-05-11 | 24.910 | 25.580 | 24.910 | 25.290 | 17.021 | 446,600 |
| 2010-05-10 | 25.240 | 25.240 | 24.600 | 25.190 | 16.954 | 584,300 |
| 2010-05-07 | 24.620 | 24.730 | 24.030 | 24.290 | 16.348 | 1,491,500 |
| 2010-05-06 | 25.760 | 25.850 | 22.630 | 24.580 | 16.543 | 1,912,500 |
| 2010-05-05 | 26.160 | 26.500 | 25.740 | 25.870 | 17.411 | 855,000 |
| 2010-05-04 | 26.350 | 26.530 | 26.260 | 26.410 | 17.775 | 675,100 |
| 2010-05-03 | 26.380 | 26.610 | 26.300 | 26.590 | 17.896 | 496,700 |
| 2010-04-30 | 26.500 | 26.560 | 26.220 | 26.270 | 17.680 | 560,900 |
| 2010-04-29 | 25.850 | 26.560 | 25.800 | 26.560 | 17.876 | 785,200 |
| 2010-04-28 | 26.210 | 26.290 | 25.710 | 25.810 | 17.371 | 706,800 |
| 2010-04-27 | 26.400 | 26.790 | 26.020 | 26.060 | 17.539 | 752,400 |
| 2010-04-26 | 26.550 | 26.650 | 26.380 | 26.440 | 17.795 | 520,000 |
| 2010-04-23 | 26.500 | 27.000 | 26.210 | 26.510 | 17.842 | 782,600 |
| 2010-04-22 | 25.680 | 26.350 | 25.510 | 26.310 | 17.707 | 631,800 |
| 2010-04-21 | 25.790 | 25.890 | 25.510 | 25.760 | 17.337 | 551,300 |
| 2010-04-20 | 25.490 | 25.840 | 25.310 | 25.840 | 17.391 | 437,800 |
| 2010-04-19 | 25.250 | 25.440 | 25.070 | 25.400 | 17.095 | 505,100 |
| 2010-04-16 | 25.350 | 25.530 | 25.170 | 25.370 | 17.075 | 598,800 |
| 2010-04-15 | 25.180 | 25.420 | 25.100 | 25.340 | 17.054 | 454,200 |
| 2010-04-14 | 25.010 | 25.240 | 24.990 | 25.240 | 16.987 | 286,500 |
| 2010-04-13 | 24.710 | 25.020 | 24.710 | 25.020 | 16.839 | 410,200 |
| 2010-04-12 | 24.550 | 24.810 | 24.300 | 24.810 | 16.698 | 307,200 |
| 2010-04-09 | 24.510 | 24.620 | 24.290 | 24.610 | 16.563 | 398,900 |
| 2010-04-08 | 24.680 | 24.730 | 24.500 | 24.580 | 16.543 | 537,900 |
| 2010-04-07 | 24.570 | 24.770 | 24.460 | 24.680 | 16.610 | 455,200 |
| 2010-04-06 | 24.460 | 24.820 | 24.460 | 24.730 | 16.644 | 467,900 |
| 2010-04-05 | 24.500 | 24.650 | 24.460 | 24.600 | 16.556 | 510,200 |
| 2010-04-01 | 24.590 | 24.730 | 24.330 | 24.500 | 16.489 | 463,400 |
| 2010-03-31 | 24.830 | 24.940 | 24.530 | 24.550 | 16.523 | 451,000 |
| 2010-03-30 | 25.010 | 25.040 | 24.760 | 24.910 | 16.765 | 425,100 |
| 2010-03-29 | 25.010 | 25.120 | 24.770 | 24.950 | 16.792 | 450,800 |
| 2010-03-26 | 25.250 | 25.310 | 25.020 | 25.090 | 16.671 | 410,500 |
| 2010-03-25 | 25.180 | 25.280 | 25.060 | 25.170 | 16.724 | 569,800 |
| 2010-03-24 | 25.170 | 25.170 | 24.740 | 25.060 | 16.651 | 510,500 |
| 2010-03-23 | 24.930 | 25.210 | 24.760 | 25.210 | 16.751 | 746,600 |
| 2010-03-22 | 25.500 | 25.500 | 24.920 | 24.970 | 16.591 | 2,011,100 |
| 2010-03-19 | 25.580 | 25.600 | 24.960 | 25.580 | 16.996 | 915,900 |
| 2010-03-18 | 25.700 | 25.840 | 25.610 | 25.730 | 17.096 | 327,900 |
| 2010-03-17 | 25.560 | 25.680 | 25.400 | 25.640 | 17.036 | 325,300 |
| 2010-03-16 | 25.300 | 25.610 | 25.290 | 25.490 | 16.937 | 496,500 |
| 2010-03-15 | 25.250 | 25.440 | 25.050 | 25.320 | 16.824 | 625,900 |
| 2010-03-12 | 24.860 | 25.210 | 24.700 | 25.210 | 16.751 | 729,200 |
| 2010-03-11 | 24.580 | 24.810 | 24.460 | 24.730 | 16.432 | 434,900 |
| 2010-03-10 | 24.420 | 24.640 | 24.200 | 24.640 | 16.372 | 768,400 |
| 2010-03-09 | 24.370 | 24.480 | 24.190 | 24.430 | 16.232 | 728,800 |
| 2010-03-08 | 24.420 | 24.560 | 24.360 | 24.390 | 16.206 | 541,200 |
| 2010-03-05 | 24.320 | 24.450 | 24.050 | 24.430 | 16.232 | 334,800 |
| 2010-03-04 | 24.390 | 24.500 | 24.020 | 24.170 | 16.060 | 482,800 |
| 2010-03-03 | 24.090 | 24.320 | 24.060 | 24.290 | 16.139 | 389,100 |
| 2010-03-02 | 24.010 | 24.160 | 23.880 | 24.130 | 16.033 | 484,400 |
| 2010-03-01 | 23.770 | 24.030 | 23.700 | 24.020 | 15.960 | 567,700 |
| 2010-02-26 | 23.790 | 23.830 | 23.590 | 23.730 | 15.767 | 480,800 |
| 2010-02-25 | 23.630 | 23.800 | 23.590 | 23.770 | 15.794 | 362,500 |
| 2010-02-24 | 23.790 | 23.880 | 23.730 | 23.870 | 15.860 | 378,800 |
| 2010-02-23 | 23.600 | 23.810 | 23.490 | 23.720 | 15.761 | 455,900 |
| 2010-02-22 | 23.600 | 23.620 | 23.410 | 23.610 | 15.687 | 317,200 |
| 2010-02-19 | 23.340 | 23.540 | 23.280 | 23.540 | 15.641 | 361,100 |
| 2010-02-18 | 23.280 | 23.360 | 23.150 | 23.340 | 15.508 | 443,600 |
| 2010-02-17 | 23.060 | 23.330 | 22.950 | 23.270 | 15.462 | 588,600 |
Stock splits
| Date | Split (new : old) |
|---|
| 2001-01-19 | 2:1 |
| 2000-03-16 | 2:1 |
Dividends
| Ex-date | Amount |
|---|
| 2026-09-08 | 0.7000 USD |
| 2026-06-05 | 0.7000 USD |
| 2026-03-06 | 0.7000 USD |
| 2025-12-05 | 0.6500 USD |
| 2025-09-05 | 0.6500 USD |
| 2025-06-06 | 0.6500 USD |
| 2025-03-07 | 0.6500 USD |
| 2024-12-06 | 0.6000 USD |
| 2024-09-06 | 0.6000 USD |
| 2024-06-07 | 0.6000 USD |
| 2024-02-29 | 0.6000 USD |
| 2023-11-30 | 0.5500 USD |
| 2023-08-31 | 0.5500 USD |
| 2023-06-01 | 0.5500 USD |
| 2023-03-02 | 0.5500 USD |
| 2022-12-01 | 0.5100 USD |
| 2022-09-01 | 0.5100 USD |
| 2022-06-02 | 0.5100 USD |
| 2022-03-03 | 0.5100 USD |
| 2021-12-02 | 0.4800 USD |
| 2021-09-02 | 0.4800 USD |
| 2021-06-03 | 0.4800 USD |
| 2021-03-04 | 0.4800 USD |
| 2020-12-03 | 0.4500 USD |
| 2020-09-03 | 0.4500 USD |
| 2020-06-04 | 0.4500 USD |
| 2020-03-05 | 0.4500 USD |
| 2019-12-05 | 0.4300 USD |
| 2019-09-05 | 0.4300 USD |
| 2019-06-06 | 0.4300 USD |
| 2019-02-28 | 0.4300 USD |
Open, high, low and close are as traded (USD). Adjusted close accounts for splits and dividends. Educational only, not financial advice.