| 2026 |
| 10/02 | 725 | 725 | 714 | 719 | -0.83% | 44,000 | - | +3.45% |
| 10/01 | 719 | 726 | 713 | 725 | +0.83% | 106,200 | - | +4.47% |
| 09/30 | 724 | 726 | 718 | 719 | -0.69% | 44,000 | - | +3.75% |
| 09/29 | 710 | 724 | 705 | 724 | +0.42% | 225,700 | - | +4.62% |
| 09/28 | 729 | 735 | 720 | 721 | -0.55% | 80,000 | - | +4.34% |
| 09/25 | 709 | 725 | 709 | 725 | +2.55% | 100,900 | - | +5.22% |
| 09/24 | 695 | 708 | 694 | 707 | +2.02% | 86,600 | - | +2.61% |
| 09/18 | 693 | 693 | 689 | 693 | +0.29% | 68,300 | - | +0.73% |
| 09/17 | 688 | 691 | 683 | 691 | +1.17% | 51,200 | - | +0.29% |
| 09/16 | 683 | 686 | 683 | 683 | +0.44% | 34,700 | - | -0.87% |
| 09/15 | 677 | 682 | 677 | 680 | +0.44% | 45,300 | - | -1.45% |
| 09/14 | 672 | 677 | 671 | 677 | +1.2% | 18,000 | - | -2.03% |
| 09/11 | 670 | 674 | 665 | 669 | -1.47% | 75,300 | - | -3.32% |
| 09/10 | 675 | 681 | 671 | 679 | +0.59% | 39,400 | - | -2.02% |
| 09/09 | 676 | 682 | 671 | 675 | -0.3% | 51,300 | - | -2.6% |
| 09/08 | 685 | 686 | 677 | 677 | -1.17% | 63,300 | - | -2.45% |
| 09/07 | 684 | 690 | 684 | 685 | +0.44% | 46,400 | - | -1.3% |
| 09/04 | 685 | 686 | 682 | 682 | -0.44% | 46,400 | - | -1.73% |
| 09/03 | 689 | 692 | 683 | 685 | -0.44% | 54,800 | - | -1.44% |
| 09/02 | 693 | 694 | 686 | 688 | -1.57% | 43,000 | - | -1.01% |
| 09/01 | 700 | 707 | 695 | 699 | +0.43% | 46,400 | - | +0.43% |
| 08/31 | 694 | 697 | 690 | 696 | +0.58% | 31,400 | - | 0% |
| 08/28 | 697 | 698 | 690 | 692 | -0.43% | 37,200 | - | -0.57% |
| 08/27 | 698 | 700 | 694 | 695 | 0% | 25,400 | - | -0.14% |
| 08/26 | 696 | 701 | 694 | 695 | +0.43% | 38,800 | - | -0.14% |
| 08/25 | 690 | 696 | 689 | 692 | -0.14% | 20,800 | - | -0.72% |
| 08/24 | 691 | 696 | 690 | 693 | -0.14% | 32,400 | - | -0.57% |
| 08/21 | 684 | 695 | 682 | 694 | +0.14% | 49,400 | - | -0.43% |
| 08/20 | 695 | 695 | 687 | 693 | +0.58% | 25,600 | - | -0.57% |
| 08/19 | 701 | 701 | 683 | 689 | -2.27% | 71,800 | - | -1.15% |
| 08/18 | 701 | 706 | 700 | 705 | 0% | 32,900 | - | +1.15% |
| 08/17 | 714 | 714 | 700 | 705 | -0.14% | 27,200 | - | +1.29% |
| 08/14 | 701 | 713 | 696 | 706 | +0.71% | 54,800 | - | +1.58% |
| 08/13 | 683 | 705 | 678 | 701 | +1.15% | 74,700 | - | +1.01% |
| 08/12 | (IR情報)15:30 2027年3月期第1四半期決算短信〔日本基準〕(連結) |
| 08/12 | 708 | 708 | 693 | 693 | -1.28% | 86,800 | - | 0% |
| 08/10 | 704 | 708 | 699 | 702 | -0.14% | 32,100 | - | +1.45% |
| 08/07 | 696 | 710 | 693 | 703 | +0.43% | 43,700 | - | +1.74% |
| 08/06 | 695 | 704 | 693 | 700 | +1.16% | 24,000 | - | +1.45% |
| 08/05 | 684 | 696 | 680 | 692 | +1.76% | 32,900 | - | +0.44% |
| 08/04 | 675 | 687 | 675 | 680 | +0.74% | 36,200 | - | -1.31% |
| 08/03 | 699 | 699 | 664 | 675 | -2.74% | 207,000 | - | -1.89% |
| 07/31 | 698 | 701 | 693 | 694 | -0.57% | 23,600 | - | +0.87% |
| 07/30 | 700 | 700 | 693 | 698 | -0.29% | 17,300 | - | +1.45% |
| 07/29 | 696 | 700 | 690 | 700 | +0.57% | 29,600 | - | +1.89% |
| 07/28 | 707 | 707 | 690 | 696 | -1% | 55,000 | - | +1.31% |
| 07/27 | 700 | 703 | 694 | 703 | +1.59% | 20,000 | - | +2.33% |
| 07/24 | 700 | 700 | 689 | 692 | -1.14% | 34,000 | - | +0.87% |
| 07/23 | 706 | 707 | 699 | 700 | -0.85% | 21,600 | - | +1.89% |
| 07/22 | 713 | 716 | 706 | 706 | -0.42% | 40,200 | - | +2.77% |
| 07/21 | 697 | 709 | 697 | 709 | +3.2% | 52,600 | - | +3.35% |
| 07/17 | 700 | 704 | 681 | 687 | -1.86% | 71,900 | - | +0.15% |
| 07/16 | 703 | 709 | 697 | 700 | -0.43% | 37,500 | - | +2.04% |
| 07/15 | 694 | 703 | 694 | 703 | +1.74% | 47,700 | - | +2.63% |
| 07/14 | 689 | 691 | 685 | 691 | +1.77% | 57,100 | - | +1.02% |
| 07/13 | 690 | 693 | 677 | 679 | -0.88% | 173,700 | - | -0.73% |
| 07/10 | (5%ルール)東北特殊鋼(0.84%)大同興業(0.26%)大同特殊鋼(11.49%) |
| 07/10 | 684 | 690 | 680 | 685 | +1.03% | 58,800 | - | +0.15% |
| 07/09 | 679 | 688 | 675 | 678 | +1.04% | 46,500 | - | -1.17% |
| 07/08 | 681 | 681 | 671 | 671 | -1.47% | 36,100 | - | -2.33% |
| 07/07 | 687 | 691 | 677 | 681 | -0.58% | 36,300 | - | -1.16% |
| 07/06 | 675 | 685 | 671 | 685 | +2.09% | 47,900 | - | -0.72% |
| 07/03 | 678 | 679 | 662 | 671 | -0.15% | 67,000 | - | -2.89% |
| 07/02 | 670 | 680 | 670 | 672 | +0.45% | 32,400 | - | -2.89% |
| 07/01 | 688 | 689 | 669 | 669 | -2.76% | 45,500 | - | -3.6% |
| 06/30 | 675 | 690 | 675 | 688 | +2.69% | 35,300 | - | -1.15% |
| 06/29 | (IR情報)15:00 役員人事に関するお知らせ |
| 06/29 | 673 | 680 | 664 | 670 | -0.59% | 61,300 | - | -3.74% |
| 06/26 | 687 | 688 | 669 | 674 | -1.89% | 59,200 | - | -3.02% |
| 06/25 | 695 | 698 | 685 | 687 | +0.29% | 41,400 | - | -1.01% |
| 06/24 | 681 | 691 | 679 | 685 | +0.15% | 48,900 | - | -1.01% |
| 06/23 | 697 | 699 | 681 | 684 | -2.15% | 59,200 | - | -0.87% |
| 06/22 | 700 | 700 | 691 | 699 | +1.3% | 50,400 | - | +1.45% |
| 06/19 | 703 | 703 | 690 | 690 | -1.85% | 58,400 | - | +0.58% |
| 06/18 | 703 | 710 | 701 | 703 | 0% | 33,400 | - | +2.93% |
| 06/17 | 695 | 710 | 694 | 703 | +1.01% | 36,500 | - | +3.53% |
| 06/16 | 698 | 704 | 691 | 696 | -0.29% | 40,000 | - | +3.26% |
| 06/15 | 699 | 705 | 693 | 698 | +1.16% | 51,400 | - | +4.18% |
| 06/12 | 687 | 692 | 680 | 690 | +1.92% | 42,800 | - | +3.6% |
| 06/11 | 666 | 684 | 657 | 677 | +0.59% | 81,500 | - | +2.27% |
| 06/10 | 684 | 686 | 664 | 673 | -1.9% | 114,200 | - | +2.12% |
| 06/09 | 695 | 712 | 681 | 686 | -0.44% | 71,300 | - | +4.57% |
| 06/08 | 708 | 708 | 688 | 689 | -4.17% | 99,700 | - | +5.51% |
| 06/05 | 718 | 726 | 715 | 719 | +0.84% | 57,500 | - | +10.79% |
| 06/04 | 712 | 722 | 705 | 713 | -0.56% | 86,300 | - | +10.54% |
| 06/03 | 701 | 718 | 694 | 717 | +1.7% | 92,700 | - | +12.03% |
| 06/02 | 718 | 724 | 702 | 705 | -0.56% | 108,600 | - | +11.02% |
| 06/01 | 723 | 728 | 703 | 709 | -0.84% | 142,000 | - | +12.54% |
| 05/29 | 724 | 731 | 712 | 715 | -0.28% | 121,000 | - | +14.22% |
| 05/28 | 701 | 723 | 693 | 717 | +2.28% | 132,300 | - | +15.65% |
| 05/27 | 684 | 701 | 673 | 701 | +1.89% | 111,200 | - | +14.17% |
| 05/26 | 658 | 693 | 650 | 688 | +4.88% | 150,000 | - | +12.97% |
| 05/25 | 657 | 658 | 634 | 656 | -0.15% | 137,600 | - | +8.79% |
| 05/22 | 641 | 663 | 637 | 657 | +3.63% | 137,000 | - | +9.5% |
| 05/21 | 635 | 645 | 621 | 634 | +1.28% | 208,100 | - | +6.38% |
| 05/20 | 634 | 642 | 613 | 626 | -7.12% | 409,900 | - | +5.56% |
| 05/19 | (IR情報)15:40 2026年3月期決算短信〔日本基準〕(連結) |
| 05/19 | (IR情報)15:40 剰余金の配当に関するお知らせ |
| 05/19 | (IR情報)15:40 当社株式の大規模買付行為に関する対応方針(買収への対応方針)の継続について |
| 05/19 | 614 | 684 | 586 | 674 | +10.67% | 917,000 | - | +13.85% |
| 05/18 | 620 | 621 | 604 | 609 | -1.46% | 92,700 | - | +3.57% |
| 05/15 | 611 | 618 | 606 | 618 | +2.15% | 119,300 | - | +5.46% |
| 05/14 | 596 | 607 | 593 | 605 | +2.54% | 109,100 | - | +3.6% |
| 05/13 | 592 | 596 | 589 | 590 | -0.67% | 27,500 | - | +1.37% |
| 05/12 | 595 | 604 | 592 | 594 | -0.67% | 44,000 | - | +2.24% |
| 05/11 | 600 | 600 | 593 | 598 | +1.36% | 60,500 | - | +3.1% |