| 2026 |
| 09/16 | 750 | 757 | 744 | 746 | -1.06% | 28,600 | - | -2.23% |
| 09/15 | 743 | 755 | 743 | 754 | +0.53% | 40,500 | - | -1.31% |
| 09/14 | 740 | 751 | 737 | 750 | +1.08% | 46,800 | - | -1.96% |
| 09/11 | 746 | 754 | 742 | 742 | -1.85% | 71,600 | - | -3.01% |
| 09/10 | 750 | 757 | 747 | 756 | +0.8% | 70,400 | - | -1.43% |
| 09/09 | 752 | 754 | 750 | 750 | -0.66% | 28,200 | - | -2.34% |
| 09/08 | 754 | 759 | 751 | 755 | -0.13% | 34,500 | - | -1.69% |
| 09/07 | 763 | 764 | 756 | 756 | -1.18% | 30,300 | - | -1.69% |
| 09/04 | 761 | 765 | 758 | 765 | +0.66% | 51,000 | - | -0.65% |
| 09/03 | 765 | 772 | 760 | 760 | -0.39% | 40,100 | - | -1.43% |
| 09/02 | 770 | 770 | 761 | 763 | -0.91% | 54,400 | - | -1.17% |
| 09/01 | 778 | 783 | 765 | 770 | +1.32% | 96,100 | - | -0.39% |
| 08/31 | 759 | 764 | 756 | 760 | 0% | 27,600 | - | -1.68% |
| 08/28 | 762 | 766 | 759 | 760 | -0.52% | 31,000 | - | -1.81% |
| 08/27 | 764 | 769 | 763 | 764 | -0.39% | 26,200 | - | -1.42% |
| 08/26 | 761 | 769 | 761 | 767 | +0.66% | 31,900 | - | -1.03% |
| 08/25 | (IR情報)15:30 「2026年6月期」企業調査レポート発行に関するお知らせ |
| 08/25 | 774 | 774 | 760 | 762 | -1.17% | 45,300 | - | -1.8% |
| 08/24 | (IR情報)17:45 2026年6月期決算説明会 書き起こし記事掲載のお知らせ |
| 08/24 | 765 | 779 | 763 | 771 | +0.52% | 36,900 | - | -0.64% |
| 08/21 | 770 | 770 | 764 | 767 | -0.78% | 34,000 | - | -1.16% |
| 08/20 | 765 | 774 | 762 | 773 | +0.78% | 44,400 | - | -0.39% |
| 08/19 | 775 | 776 | 766 | 767 | -1.54% | 41,100 | - | -1.16% |
| 08/18 | 780 | 782 | 774 | 779 | 0% | 38,300 | - | +0.39% |
| 08/17 | 780 | 788 | 779 | 779 | -0.38% | 72,600 | - | +0.39% |
| 08/14 | 780 | 787 | 779 | 782 | +0.26% | 59,900 | - | +0.64% |
| 08/13 | 775 | 781 | 772 | 780 | +1.04% | 88,100 | - | +0.52% |
| 08/12 | 771 | 776 | 765 | 772 | +0.78% | 70,800 | - | -0.52% |
| 08/10 | 752 | 774 | 737 | 766 | +0.92% | 160,800 | - | -1.29% |
| 08/07 | (IR情報)13:00 2026年6月期決算短信〔日本基準〕(連結) |
| 08/07 | (IR情報)13:00 2026年6月期決算説明会資料 |
| 08/07 | 789 | 790 | 759 | 759 | -3.44% | 129,300 | - | -2.32% |
| 08/06 | 779 | 788 | 779 | 786 | +1.16% | 39,900 | - | +1.16% |
| 08/05 | 771 | 780 | 768 | 777 | +0.78% | 51,400 | - | +0.13% |
| 08/04 | 776 | 781 | 771 | 771 | -1.15% | 34,900 | - | -0.52% |
| 08/03 | 777 | 784 | 767 | 780 | +0.39% | 65,800 | - | +0.78% |
| 07/31 | 791 | 796 | 777 | 777 | -1.77% | 22,300 | - | +0.52% |
| 07/30 | 784 | 795 | 780 | 791 | +0.25% | 68,500 | - | +2.46% |
| 07/29 | 770 | 789 | 769 | 789 | +2.2% | 41,600 | - | +2.33% |
| 07/28 | 779 | 779 | 771 | 772 | -0.9% | 25,100 | - | +0.39% |
| 07/27 | 778 | 784 | 774 | 779 | +0.26% | 38,100 | - | +1.3% |
| 07/24 | 777 | 778 | 768 | 777 | -0.38% | 44,000 | - | +1.17% |
| 07/23 | 783 | 783 | 773 | 780 | 0% | 23,100 | - | +1.69% |
| 07/22 | 777 | 782 | 772 | 780 | +0.91% | 39,000 | - | +1.83% |
| 07/21 | 761 | 779 | 761 | 773 | +1.58% | 68,800 | - | +1.05% |
| 07/17 | 775 | 777 | 758 | 761 | -1.68% | 44,000 | - | -0.39% |
| 07/16 | 775 | 781 | 774 | 774 | -0.9% | 33,100 | - | +1.31% |
| 07/15 | 770 | 781 | 770 | 781 | +1.56% | 68,400 | - | +2.36% |
| 07/14 | 773 | 775 | 769 | 769 | -0.13% | 38,900 | - | +0.79% |
| 07/13 | 787 | 793 | 770 | 770 | -1.66% | 84,600 | - | +1.05% |
| 07/10 | 781 | 786 | 776 | 783 | -0.13% | 44,600 | - | +2.89% |
| 07/09 | 779 | 785 | 776 | 784 | +0.9% | 48,100 | - | +3.02% |
| 07/08 | 771 | 777 | 768 | 777 | +0.13% | 50,200 | - | +2.37% |
| 07/07 | 770 | 785 | 770 | 776 | +0.52% | 64,200 | - | +2.37% |
| 07/06 | 776 | 779 | 769 | 772 | -0.39% | 41,000 | - | +1.85% |
| 07/03 | 768 | 776 | 763 | 775 | +0.91% | 105,000 | - | +2.24% |
| 07/02 | 758 | 769 | 757 | 768 | +1.72% | 59,700 | - | +1.19% |
| 07/01 | 755 | 758 | 748 | 755 | -0.4% | 77,400 | - | -0.66% |
| 06/30 | (IR情報)10:00 コーアイセイ蔵王第二工場竣工に関するお知らせ |
| 06/30 | 758 | 760 | 755 | 758 | +0.26% | 55,600 | - | -0.52% |
| 06/29 | 745 | 760 | 740 | 756 | -0.26% | 374,300 | - | -1.05% |
| 06/26 | 755 | 760 | 750 | 758 | +1.34% | 541,700 | - | -0.92% |
| 06/25 | 756 | 757 | 746 | 748 | -0.27% | 126,800 | - | -2.48% |
| 06/24 | (IR情報)13:00 当社及び子会社における役員の異動に関するお知らせ |
| 06/24 | 753 | 758 | 750 | 750 | -0.66% | 67,400 | - | -2.6% |
| 06/23 | 767 | 768 | 753 | 755 | -0.26% | 56,200 | - | -2.2% |
| 06/22 | (IR情報)13:30 連結子会社からの配当金受領に関するお知らせ |
| 06/22 | 753 | 760 | 750 | 757 | +0.53% | 73,400 | - | -2.2% |
| 06/19 | 759 | 760 | 750 | 753 | -0.66% | 48,400 | - | -2.96% |
| 06/18 | 765 | 765 | 748 | 758 | 0% | 92,800 | - | -2.7% |
| 06/17 | 758 | 767 | 756 | 758 | +0.8% | 69,900 | - | -3.19% |
| 06/16 | 758 | 758 | 750 | 752 | -0.79% | 66,500 | - | -4.45% |
| 06/15 | 764 | 770 | 758 | 758 | +0.4% | 78,200 | - | -4.17% |
| 06/12 | 760 | 764 | 751 | 755 | -0.26% | 82,500 | - | -5.15% |
| 06/11 | 753 | 760 | 751 | 757 | -0.66% | 73,200 | - | -5.49% |
| 06/10 | 755 | 768 | 753 | 762 | +1.2% | 82,800 | - | -5.34% |
| 06/09 | 761 | 764 | 749 | 753 | -0.13% | 67,300 | - | -6.92% |
| 06/08 | 759 | 770 | 751 | 754 | -1.57% | 77,500 | - | -7.26% |
| 06/05 | 756 | 775 | 756 | 766 | +2.27% | 79,300 | - | -6.24% |
| 06/04 | 744 | 760 | 744 | 749 | 0% | 94,600 | - | -8.66% |
| 06/03 | 767 | 768 | 748 | 749 | -1.71% | 124,900 | - | -8.99% |
| 06/02 | 768 | 768 | 753 | 762 | -1.93% | 149,400 | - | -7.64% |
| 06/01 | 793 | 799 | 773 | 777 | -2.26% | 210,200 | - | -6.16% |
| 05/29 | 802 | 810 | 795 | 795 | -0.63% | 106,100 | - | -4.22% |
| 05/28 | 806 | 811 | 796 | 800 | -1.36% | 184,400 | - | -3.85% |
| 05/27 | 810 | 811 | 800 | 811 | +0.62% | 98,200 | - | -2.76% |
| 05/26 | (IR情報)10:00 当社「2026年6月期第3四半期」企業調査レポート発行に関するお知らせ |
| 05/26 | 795 | 809 | 792 | 806 | +2.03% | 88,000 | - | -3.47% |
| 05/25 | 812 | 814 | 788 | 790 | -2.47% | 155,100 | - | -5.39% |
| 05/22 | 820 | 824 | 809 | 810 | +0.25% | 104,300 | - | -3.23% |
| 05/21 | 810 | 814 | 801 | 808 | +0.25% | 138,600 | - | -3.58% |
| 05/20 | 801 | 809 | 796 | 806 | +1.26% | 136,400 | - | -3.93% |
| 05/19 | 808 | 810 | 796 | 796 | -1.73% | 123,100 | - | -5.24% |
| 05/18 | 819 | 831 | 808 | 810 | -1.82% | 100,800 | - | -3.8% |
| 05/15 | (5%ルール)土師(45%)首藤利幸(5.39%) |
| 05/15 | 850 | 853 | 818 | 825 | -3.4% | 86,100 | - | -2.14% |
| 05/14 | 872 | 872 | 844 | 854 | -1.84% | 59,800 | - | +1.3% |
| 05/13 | 869 | 876 | 866 | 870 | +1.05% | 53,900 | - | +3.2% |
| 05/12 | 867 | 869 | 857 | 861 | -0.23% | 34,900 | - | +2.38% |
| 05/11 | (IR情報)13:00 2026年6月期第3四半期決算短信〔日本基準〕(連結) |
| 05/11 | (IR情報)13:00 2026年6月期第3四半期決算決算補足資料 |
| 05/11 | 881 | 883 | 860 | 863 | -2.27% | 88,900 | - | +2.74% |
| 05/08 | 873 | 883 | 872 | 883 | +0.91% | 77,700 | - | +5.24% |
| 05/07 | 878 | 885 | 868 | 875 | +2.22% | 117,700 | - | +4.67% |
| 05/01 | (IR情報)13:00 個人投資家向け会社説明会 動画掲載のお知らせ |
| 05/01 | 859 | 859 | 851 | 856 | -0.58% | 41,900 | - | +2.51% |
| 04/30 | 860 | 862 | 842 | 861 | +0.94% | 87,700 | - | +3.24% |
| 04/28 | 840 | 853 | 836 | 853 | +2.52% | 68,500 | - | +2.52% |
| 04/27 | 818 | 834 | 811 | 832 | +2.72% | 54,000 | - | +0.12% |
| 04/24 | 818 | 819 | 807 | 810 | -0.86% | 55,900 | - | -2.41% |
| 04/23 | 818 | 828 | 814 | 817 | -0.73% | 66,400 | - | -1.68% |
| 04/22 | 833 | 837 | 821 | 823 | -1.44% | 43,300 | - | -1.08% |