| 2017 |
| 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% |
| 09/26 | 916 | 923 | 914 | 919 | +0.82% | 39,600 | 557億5768万 | +2.57% |
| 09/25 | 911 | 919 | 906 | 912 | -0.05% | 22,000 | 553億263万 | +2.07% |
| 09/22 | 932 | 937 | 904 | 912 | -2.77% | 35,400 | 553億3297万 | +2.36% |
| 09/21 | 925 | 948 | 925 | 938 | +1.08% | 83,200 | 569億1045万 | +5.51% |
| 09/20 | 920 | 930 | 917 | 928 | +0.05% | 40,000 | 563億372万 | +4.86% |
| 09/19 | 901 | 934 | 901 | 928 | +2.49% | 91,800 | 562億7339万 | +5.16% |
| 09/15 | 896 | 909 | 896 | 905 | +0.06% | 58,400 | 549億827万 | +2.96% |
| 09/14 | 894 | 905 | 894 | 905 | 0% | 32,800 | 548億7793万 | +3.25% |
| 09/13 | 890 | 908 | 890 | 905 | +1.17% | 46,400 | 548億7793万 | +3.49% |
| 09/12 | 895 | 899 | 890 | 894 | -0.28% | 50,400 | 542億4087万 | +2.64% |
| 09/11 | 894 | 902 | 884 | 897 | +0.22% | 51,600 | 543億9255万 | +3.16% |
| 09/08 | 893 | 898 | 888 | 895 | -0.06% | 61,000 | 542億7121万 | +3.05% |
| 09/07 | 905 | 905 | 893 | 895 | +0.06% | 19,600 | 543億154万 | +3.35% |
| 09/06 | 890 | 905 | 888 | 895 | +0.51% | 60,200 | 542億7121万 | +3.53% |
| 09/05 | 899 | 902 | 889 | 890 | -0.95% | 54,600 | 539億9818万 | +3.25% |
| 09/04 | 907 | 908 | 898 | 899 | -0.99% | 45,600 | 545億1390万 | +4.48% |
| 09/01 | 888 | 913 | 887 | 908 | +2.14% | 51,800 | 550億5995万 | +5.52% |
| 08/31 | 884 | 889 | 879 | 889 | +0.57% | 56,200 | 539億718万 | +3.55% |
| 08/30 | 891 | 891 | 880 | 884 | -0.34% | 29,800 | 536億381万 | +3.09% |
| 08/29 | 869 | 890 | 868 | 887 | +1.14% | 50,200 | 537億8583万 | +3.56% |
| 08/28 | 872 | 877 | 868 | 877 | +0.34% | 43,200 | 531億7911万 | +2.51% |
| 08/25 | 866 | 874 | 859 | 874 | +1.51% | 58,400 | 529億9709万 | +2.4% |
| 08/24 | 863 | 872 | 858 | 861 | 0% | 57,000 | 522億836万 | +1% |
| 08/23 | 855 | 861 | 852 | 861 | +0.94% | 32,600 | 522億836万 | +1.12% |
| 08/22 | 852 | 854 | 849 | 853 | +0.18% | 38,400 | 517億2298万 | +0.18% |
| 08/21 | 850 | 857 | 849 | 851 | -0.58% | 26,400 | 516億3197万 | -0.12% |
| 08/18 | 850 | 863 | 848 | 856 | +0.77% | 37,800 | 519億3533万 | +0.47% |
| 08/17 | 845 | 853 | 845 | 850 | +0.47% | 23,000 | 515億4096万 | -0.41% |
| 08/16 | 842 | 850 | 840 | 846 | +0.18% | 81,200 | 512億9827万 | -1.11% |
| 08/15 | 857 | 857 | 842 | 844 | -0.76% | 63,400 | 512億727万 | -1.4% |
| 08/14 | 831 | 862 | 831 | 851 | +0.41% | 92,600 | 516億163万 | -0.87% |
| 08/10 | 16:30 子会社間の合併に関するお知らせ |
| 08/10 | 16:30 業績予想との差異に関するお知らせ |
| 08/10 | 16:30 平成29年12月期第2四半期決算短信〔日本基準〕(連結) |
| 08/10 | 831 | 858 | 831 | 847 | +1.13% | 54,200 | 513億8928万 | -1.51% |
| 08/09 | 841 | 845 | 830 | 838 | -0.83% | 57,000 | 508億1290万 | -2.84% |
| 08/08 | 858 | 860 | 841 | 845 | -0.47% | 31,000 | 512億3760万 | -2.26% |
| 08/07 | 855 | 859 | 845 | 849 | -0.47% | 36,400 | 514億8029万 | -1.91% |
| 08/04 | 840 | 854 | 840 | 853 | +0.29% | 37,600 | 517億2298万 | -1.67% |