| 2018 |
| 02/23 | 855 | 876 | 855 | 865 | +1.41% | 24,800 | 524億8138万 | -1.59% |
| 02/22 | 850 | 860 | 842 | 853 | +0.35% | 37,600 | 517億5332万 | -3.29% |
| 02/21 | 849 | 859 | 848 | 850 | -0.29% | 38,000 | 515億7130万 | -3.95% |
| 02/20 | 850 | 857 | 847 | 853 | -0.7% | 23,200 | 517億2298万 | -4% |
| 02/19 | 855 | 863 | 852 | 859 | +1.24% | 28,400 | 520億8701万 | -3.76% |
| 02/16 | 850 | 865 | 845 | 848 | +0.36% | 36,400 | 514億4995万 | -5.25% |
| 02/15 | 845 | 865 | 845 | 845 | -0.53% | 67,600 | 512億6794万 | -6.01% |
| 02/14 | 16:30 人事異動ならびに子会社の組織変更および人事異動に関するお知らせ |
| 02/14 | 16:30 代表取締役の異動に関するお知らせ |
| 02/14 | 16:30 平成29年12月期決算短信[日本基準](連結) |
| 02/14 | 834 | 860 | 833 | 850 | +0.59% | 39,400 | 515億4096万 | -6.03% |
| 02/13 | 844 | 851 | 838 | 845 | +0.18% | 45,200 | 512億3760万 | -6.99% |
| 02/09 | 830 | 845 | 823 | 843 | -1.29% | 47,800 | 511億4659万 | -7.57% |
| 02/08 | 852 | 863 | 845 | 854 | +0.23% | 37,200 | 518億1399万 | -6.87% |
| 02/07 | 840 | 864 | 840 | 852 | +3.78% | 62,400 | 516億9264万 | -7.39% |
| 02/06 | 850 | 859 | 807 | 821 | -6.81% | 53,400 | 498億1181万 | -11.15% |
| 02/05 | 890 | 897 | 878 | 881 | -2.54% | 45,400 | 534億5213万 | -5.27% |
| 02/02 | 910 | 910 | 895 | 904 | -0.6% | 23,400 | 548億4759万 | -3.11% |
| 02/01 | 887 | 910 | 887 | 910 | +2.65% | 32,200 | 551億8129万 | -2.73% |
| 01/31 | 911 | 926 | 886 | 886 | -2.85% | 89,600 | 537億5550万 | -5.44% |
| 01/30 | 914 | 925 | 911 | 912 | -0.33% | 33,600 | 553億3297万 | -2.77% |
| 01/29 | 921 | 926 | 914 | 915 | -0.49% | 20,600 | 555億1499万 | -2.45% |
| 01/26 | 925 | 931 | 918 | 920 | -0.54% | 18,800 | 557億8801万 | -1.97% |
| 01/25 | 926 | 930 | 921 | 925 | -0.16% | 22,400 | 560億9137万 | -1.44% |
| 01/24 | 926 | 935 | 926 | 926 | +0.05% | 17,200 | 561億8238万 | -1.28% |
| 01/23 | 930 | 930 | 922 | 926 | +0.43% | 9,800 | 561億5204万 | -1.33% |
| 01/22 | 914 | 924 | 914 | 922 | -0.22% | 14,800 | 559億936万 | -1.76% |
| 01/19 | 916 | 930 | 916 | 924 | 0% | 19,000 | 560億3070万 | -1.55% |
| 01/18 | 933 | 937 | 921 | 924 | -0.81% | 30,600 | 560億3070万 | -1.55% |
| 01/17 | 941 | 942 | 931 | 931 | -1.06% | 16,800 | 564億8574万 | -0.85% |
| 01/16 | 936 | 941 | 934 | 941 | +0.27% | 11,400 | 570億9246万 | +0.21% |
| 01/15 | 943 | 945 | 937 | 939 | -0.42% | 12,200 | 569億4078万 | +0.05% |
| 01/12 | 941 | 946 | 929 | 943 | -0.53% | 31,000 | 571億8347万 | +0.48% |
| 01/11 | 950 | 957 | 943 | 948 | -0.58% | 24,400 | 574億8683万 | +1.01% |
| 01/10 | 950 | 955 | 945 | 953 | +0.42% | 21,200 | 578億2053万 | +1.6% |
| 01/09 | 951 | 955 | 937 | 949 | -0.26% | 21,600 | 575億7784万 | +1.06% |
| 01/05 | 966 | 966 | 944 | 952 | -1.14% | 31,800 | 577億2952万 | +1.44% |
| 01/04 | 949 | 971 | 949 | 963 | +1.69% | 52,400 | 583億9691万 | +2.61% |
| 2017 |
| 12/29 | 949 | 952 | 938 | 947 | -0.26% | 14,800 | 574億2616万 | +1.12% |
| 12/28 | 961 | 961 | 949 | 949 | -1.2% | 9,000 | 575億7784万 | +1.5% |
| 12/27 | 963 | 964 | 947 | 961 | -0.21% | 35,800 | 582億7557万 | +2.84% |
| 12/26 | 955 | 965 | 954 | 963 | +0.94% | 22,400 | 583億9691万 | +3.16% |
| 12/25 | 948 | 955 | 945 | 954 | +0.63% | 13,400 | 578億5086万 | +2.42% |
| 12/22 | 929 | 948 | 929 | 948 | +2.05% | 23,800 | 574億8683万 | +1.88% |
| 12/21 | 910 | 934 | 910 | 929 | +1.75% | 20,000 | 563億3406万 | -0.05% |
| 12/20 | 915 | 919 | 912 | 913 | -0.27% | 35,400 | 553億6331万 | -1.78% |
| 12/19 | 920 | 925 | 908 | 915 | -0.27% | 32,200 | 555億1499万 | -1.72% |
| 12/18 | 917 | 925 | 913 | 918 | -0.16% | 17,400 | 556億6667万 | -1.56% |
| 12/15 | 921 | 925 | 916 | 919 | -0.38% | 37,800 | 557億5768万 | -1.61% |
| 12/14 | 926 | 926 | 918 | 923 | 0% | 38,200 | 559億7003万 | -1.34% |
| 12/13 | 928 | 932 | 919 | 923 | -1.23% | 30,600 | 559億7003万 | -1.55% |
| 12/12 | 929 | 942 | 925 | 934 | +0.59% | 33,400 | 566億6776万 | -0.43% |
| 12/11 | 929 | 932 | 921 | 929 | 0% | 25,800 | 563億3406万 | -1.01% |
| 12/08 | 915 | 936 | 915 | 929 | -0.7% | 70,800 | 563億3406万 | -1.12% |
| 12/07 | 928 | 948 | 927 | 935 | +1.3% | 38,000 | 567億2843万 | -0.43% |
| 12/06 | 937 | 937 | 919 | 923 | -1.44% | 30,800 | 560億36万 | -1.7% |
| 12/05 | 930 | 937 | 925 | 937 | -0.74% | 30,000 | 568億1944万 | -0.37% |
| 12/04 | 975 | 975 | 943 | 944 | -1.2% | 23,000 | 572億4414万 | +0.37% |
| 12/01 | 15:00 子会社(大多喜ガス)による発電事業者への出資及び電力小売事業への参入について |
| 12/01 | 960 | 970 | 953 | 955 | -1.95% | 29,200 | 579億4187万 | +1.6% |
| 11/30 | 932 | 974 | 925 | 974 | +4.56% | 124,400 | 590億9464万 | +3.73% |
| 11/29 | 929 | 937 | 929 | 932 | +0.32% | 33,600 | 565億1608万 | -0.69% |
| 11/28 | 929 | 931 | 926 | 929 | -0.05% | 14,600 | 563億3406万 | -1.12% |
| 11/27 | 930 | 932 | 926 | 929 | +0.81% | 15,400 | 563億6440万 | -1.17% |
| 11/24 | 914 | 930 | 912 | 922 | -0.27% | 44,000 | 559億936万 | -1.97% |
| 11/22 | 927 | 933 | 918 | 924 | -0.32% | 19,200 | 560億6104万 | -1.7% |
| 11/21 | 920 | 936 | 920 | 927 | +0.54% | 29,800 | 562億4305万 | -1.49% |
| 11/20 | 923 | 932 | 920 | 922 | -0.11% | 47,600 | 559億3969万 | -2.12% |
| 11/17 | 926 | 934 | 920 | 923 | -0.27% | 36,200 | 560億36万 | -2.02% |
| 11/16 | 923 | 935 | 919 | 926 | +0.16% | 33,800 | 561億5204万 | -1.75% |
| 11/15 | 949 | 953 | 921 | 924 | -3.09% | 43,000 | 560億6104万 | -2.01% |
| 11/14 | 955 | 958 | 949 | 954 | +0.05% | 28,800 | 578億5086万 | +1.11% |
| 11/13 | 961 | 962 | 950 | 953 | -1.55% | 20,400 | 578億2053万 | +1.28% |
| 11/10 | 948 | 975 | 947 | 968 | +2.16% | 58,800 | 587億3061万 | +2.87% |
| 11/09 | 16:00 平成29年12月期第3四半期決算短信〔日本基準〕(連結) |
| 11/09 | 955 | 956 | 936 | 948 | -0.68% | 54,400 | 574億8683万 | +0.91% |
| 11/08 | 948 | 954 | 941 | 954 | +0.63% | 15,000 | 578億8120万 | +1.6% |
| 11/07 | 940 | 954 | 934 | 948 | +0.85% | 49,000 | 575億1717万 | +1.07% |
| 11/06 | 950 | 950 | 932 | 940 | -0.9% | 38,200 | 570億3179万 | +0.43% |
| 11/02 | 951 | 954 | 937 | 949 | +0.53% | 33,000 | 575億4750万 | +1.44% |
| 11/01 | 945 | 950 | 935 | 944 | +0.11% | 42,000 | 572億4414万 | +1.02% |
| 10/31 | 937 | 945 | 927 | 943 | +1.67% | 26,600 | 571億8347万 | +1.02% |
| 10/30 | 933 | 942 | 913 | 927 | -1.23% | 57,000 | 562億4305万 | -0.54% |
| 10/27 | 936 | 942 | 931 | 939 | -0.11% | 43,200 | 569億4078万 | +0.81% |
| 10/26 | 930 | 942 | 930 | 940 | +0.21% | 42,600 | 570億145万 | +0.91% |
| 10/25 | 951 | 959 | 937 | 938 | -1.37% | 22,600 | 568億8011万 | +0.7% |
| 10/24 | 967 | 967 | 944 | 951 | -1.25% | 28,000 | 576億6885万 | +2.2% |
| 10/23 | 946 | 985 | 928 | 963 | +2.56% | 64,400 | 583億9691万 | +3.72% |
| 10/20 | 935 | 944 | 925 | 939 | +0.64% | 40,000 | 569億4078万 | +1.35% |
| 10/19 | 940 | 945 | 926 | 933 | -0.53% | 37,200 | 565億7675万 | +0.81% |
| 10/18 | 942 | 945 | 932 | 938 | -0.48% | 34,600 | 568億8011万 | +1.57% |
| 10/17 | 943 | 943 | 928 | 942 | -0.11% | 31,200 | 571億5313万 | +2.17% |
| 10/16 | 928 | 946 | 919 | 943 | +1.51% | 37,800 | 572億1381万 | +2.5% |
| 10/13 | 924 | 935 | 910 | 929 | -0.21% | 40,400 | 563億6440万 | +1.2% |
| 10/12 | 936 | 936 | 923 | 931 | -0.05% | 15,600 | 564億8574万 | +1.64% |
| 10/11 | 934 | 934 | 919 | 932 | +0.38% | 18,600 | 565億1608万 | +1.8% |
| 10/10 | 911 | 932 | 911 | 928 | +0.54% | 24,200 | 563億372万 | +1.64% |
| 10/06 | 942 | 942 | 923 | 923 | -1.28% | 28,600 | 560億36万 | +1.1% |
| 10/05 | 935 | 941 | 933 | 935 | 0% | 30,600 | 567億2843万 | +2.63% |
| 10/04 | 937 | 941 | 895 | 935 | +0.05% | 44,000 | 567億2843万 | +2.86% |
| 10/03 | 935 | 936 | 927 | 935 | +1.03% | 30,400 | 566億9809万 | +3.03% |
| 10/02 | 915 | 927 | 910 | 925 | +0.93% | 30,800 | 561億2171万 | +2.21% |
| 09/29 | 907 | 918 | 904 | 917 | +0.94% | 29,000 | 556億599万 | +1.5% |
| 09/28 | 921 | 921 | 903 | 908 | -1.14% | 42,400 | 550億9028万 | +0.78% |
| 09/27 | 919 | 919 | 912 | 919 | -0.05% | 19,000 | 557億2734万 | +2.17% |