| 2022 |
| 05/16 | 835 | 836 | 814 | 817 | -1.45% | 78,000 | 255億4366万 | -2.97% |
| 05/13 | 806 | 830 | 806 | 829 | +2.6% | 56,000 | 259億1884万 | -2.01% |
| 05/12 | （IR情報）15:40 支配株主等に関する事項について |
| 05/12 | （IR情報）15:40 役員の異動(内定)に関するお知らせ |
| 05/12 | （IR情報）15:40 役員退職慰労金制度の廃止及び株式報酬制度の導入に関するお知らせ |
| 05/12 | 816 | 820 | 807 | 808 | -0.98% | 66,000 | 252億6227万 | -4.83% |
| 05/11 | 809 | 821 | 807 | 816 | +0.87% | 50,000 | 255億1239万 | -4.23% |
| 05/10 | 817 | 817 | 804 | 809 | -1.58% | 104,000 | 252億9353万 | -5.38% |
| 05/09 | 838 | 838 | 820 | 822 | -1.91% | 97,000 | 256億9998万 | -4.08% |
| 05/06 | 835 | 838 | 833 | 838 | +0.24% | 48,500 | 262億22万 | -2.56% |
| 05/02 | 839 | 840 | 833 | 836 | +0.24% | 75,500 | 261億3769万 | -3.02% |
| 04/28 | 822 | 835 | 819 | 834 | -0.6% | 113,500 | 270億7286万 | -3.47% |
| 04/27 | （IR情報）15:40 通期個別業績の前期決算値との差異に関するお知らせ |
| 04/27 | （IR情報）15:40 2022年3月期決算説明資料 |
| 04/27 | （IR情報）15:40 2021年3月期決算短信〔日本基準〕(連結) |
| 04/27 | 832 | 849 | 827 | 839 | -0.59% | 147,000 | 272億3516万 | -3.12% |
| 04/26 | 850 | 850 | 834 | 844 | +0.96% | 49,000 | 273億9747万 | -2.76% |
| 04/25 | 857 | 857 | 836 | 836 | -2.22% | 135,500 | 271億3778万 | -3.8% |
| 04/22 | 859 | 861 | 852 | 855 | -0.7% | 40,000 | 277億5455万 | -1.72% |
| 04/21 | 858 | 863 | 854 | 861 | +0.82% | 39,500 | 279億4932万 | -1.15% |
| 04/20 | 849 | 859 | 849 | 854 | +0.47% | 30,000 | 277億2209万 | -1.95% |
| 04/19 | 849 | 852 | 843 | 850 | +0.35% | 52,500 | 275億9224万 | -2.3% |
| 04/18 | 851 | 851 | 842 | 847 | -0.47% | 101,000 | 274億9486万 | -2.64% |
| 04/15 | 866 | 866 | 847 | 851 | -1.62% | 30,500 | 276億2470万 | -2.18% |
| 04/14 | 840 | 866 | 840 | 865 | +2.98% | 38,500 | 280億7916万 | -0.46% |
| 04/13 | 841 | 848 | 838 | 840 | -0.59% | 45,500 | 272億6763万 | -3% |
| 04/12 | 839 | 848 | 837 | 845 | +0.84% | 58,500 | 274億2993万 | -2.31% |
| 04/11 | 853 | 858 | 835 | 838 | -2.33% | 90,500 | 272億270万 | -3.12% |
| 04/08 | 866 | 869 | 855 | 858 | -0.92% | 98,500 | 278億5193万 | -1.04% |
| 04/07 | 880 | 880 | 858 | 866 | -2.81% | 98,000 | 281億1162万 | -0.12% |
| 04/06 | 914 | 914 | 891 | 891 | -2.52% | 61,500 | 289億2316万 | +2.65% |
| 04/05 | 900 | 914 | 898 | 914 | +2.01% | 122,500 | 296億6977万 | +5.3% |
| 04/04 | 890 | 899 | 887 | 896 | +0.9% | 64,500 | 290億8547万 | +3.46% |
| 04/01 | 876 | 896 | 867 | 888 | -0.22% | 85,000 | 288億2578万 | +2.66% |
| 03/31 | 920 | 920 | 888 | 890 | +2.65% | 297,000 | 288億9070万 | +3.01% |
| 03/30 | （IR情報）15:40 自己株式の消却に関するお知らせ |
| 03/30 | （IR情報）15:40 業績予想及び配当予想の修正に関するお知らせ |
| 03/30 | 863 | 881 | 862 | 867 | -2.69% | 105,500 | 281億4409万 | +0.46% |
| 03/29 | 886 | 891 | 879 | 891 | +0.11% | 157,500 | 289億2316万 | +3.13% |
| 03/28 | 889 | 891 | 881 | 890 | +0.45% | 76,500 | 288億9070万 | +3.13% |
| 03/25 | 892 | 893 | 881 | 886 | -0.78% | 103,000 | 287億6085万 | +2.67% |
| 03/24 | 882 | 893 | 880 | 893 | +0.68% | 96,000 | 289億8808万 | +3.48% |
| 03/23 | 880 | 890 | 879 | 887 | +1.6% | 88,500 | 287億9331万 | +2.78% |
| 03/22 | 867 | 876 | 866 | 873 | +0.81% | 83,500 | 283億3885万 | +1.16% |
| 03/18 | 859 | 870 | 859 | 866 | +0.81% | 79,500 | 281億1162万 | +0.35% |
| 03/17 | 867 | 870 | 859 | 859 | +0.12% | 55,500 | 278億8439万 | -0.58% |
| 03/16 | 848 | 863 | 848 | 858 | +1.3% | 74,000 | 278億5193万 | -0.81% |
| 03/15 | 852 | 853 | 844 | 847 | -0.59% | 42,500 | 274億9486万 | -2.31% |
| 03/14 | 834 | 854 | 829 | 852 | +1.91% | 38,000 | 276億5716万 | -1.96% |
| 03/11 | 820 | 841 | 818 | 836 | +1.09% | 75,500 | 271億3778万 | -3.91% |
| 03/10 | 839 | 839 | 815 | 827 | +3.38% | 77,000 | 268億4563万 | -5.27% |
| 03/09 | 810 | 833 | 800 | 800 | -1.23% | 121,500 | 259億6917万 | -8.47% |
| 03/08 | 833 | 839 | 803 | 810 | -3.69% | 120,000 | 262億9378万 | -7.74% |
| 03/07 | 877 | 877 | 838 | 841 | -4.32% | 127,500 | 273億9万 | -4.54% |
| 03/04 | 883 | 891 | 879 | 879 | +0.23% | 70,500 | 285億3362万 | -0.45% |
| 03/03 | 881 | 891 | 877 | 877 | +0.69% | 61,500 | 284億6870万 | -0.79% |
| 03/02 | 880 | 884 | 871 | 871 | -2.13% | 83,000 | 282億7393万 | -1.58% |
| 03/01 | 883 | 900 | 880 | 890 | +1.37% | 96,500 | 288億9070万 | +0.34% |
| 02/28 | 884 | 887 | 876 | 878 | +0.11% | 56,500 | 285億116万 | -1.24% |
| 02/25 | 860 | 882 | 856 | 877 | +2.57% | 85,000 | 284億6870万 | -1.57% |
| 02/24 | 860 | 860 | 847 | 855 | -0.93% | 84,500 | 277億5455万 | -4.47% |
| 02/22 | 883 | 883 | 861 | 863 | -2.27% | 117,000 | 280億1424万 | -4.22% |
| 02/21 | 899 | 900 | 880 | 883 | -0.23% | 49,000 | 286億6347万 | -2.65% |
| 02/18 | 893 | 893 | 883 | 885 | -0.9% | 49,000 | 287億2839万 | -2.96% |
| 02/17 | 886 | 899 | 886 | 893 | +0.68% | 98,000 | 289億8808万 | -2.62% |
| 02/16 | 888 | 889 | 884 | 887 | +0.45% | 46,500 | 287億9331万 | -3.9% |
| 02/15 | 879 | 883 | 878 | 883 | +0.57% | 69,500 | 286億6347万 | -4.85% |
| 02/14 | 887 | 888 | 877 | 878 | -1.13% | 95,000 | 285億116万 | -6% |
| 02/10 | 888 | 892 | 885 | 888 | +0.34% | 168,000 | 288億2578万 | -5.43% |
| 02/09 | 899 | 899 | 884 | 885 | -0.9% | 192,500 | 287億2839万 | -6.25% |
| 02/08 | 899 | 900 | 890 | 893 | -0.33% | 96,500 | 289億8808万 | -5.8% |
| 02/07 | （5%ルール）みずほ証券（0.14%）アセットマネジメントOne（0.73%）みずほ銀行（2.09%） |
| 02/07 | 898 | 900 | 890 | 896 | -0.22% | 65,500 | 290億8547万 | -5.88% |
| 02/04 | （5%ルール）野村證券（0.01%）野村アセットマネジメント（1.58%）ノムラセキュリテーズインターナショナル(NOMURA …（0.02%）ノムラインターナショナルピーエルシー(NOMURA IN…（0.92%） |
| 02/04 | 890 | 898 | 884 | 898 | +1.13% | 104,500 | 291億5039万 | -6.07% |
| 02/03 | 904 | 904 | 880 | 888 | -0.22% | 94,000 | 288億2578万 | -7.4% |
| 02/02 | 878 | 895 | 871 | 890 | +2.06% | 115,500 | 288億9070万 | -7.58% |
| 02/01 | 904 | 911 | 867 | 872 | -2.57% | 193,500 | 283億639万 | -9.73% |
| 01/31 | 885 | 899 | 870 | 895 | +1.13% | 186,000 | 290億5301万 | -7.73% |
| 01/28 | （IR情報）15:40 2022年3月期第3四半期決算短信〔日本基準〕(連結) |
| 01/28 | 891 | 891 | 877 | 885 | +0.8% | 86,500 | 287億2839万 | -8.95% |
| 01/27 | 906 | 909 | 876 | 878 | -2.98% | 115,500 | 285億116万 | -9.95% |
| 01/26 | 916 | 920 | 905 | 905 | -1.2% | 79,500 | 293億7762万 | -7.46% |
| 01/25 | 933 | 933 | 907 | 916 | -0.87% | 145,500 | 297億3470万 | -6.53% |
| 01/24 | 915 | 928 | 915 | 924 | +0.22% | 88,000 | 299億9439万 | -5.91% |
| 01/21 | （5%ルール）ノムラセキュリテーズインターナショナル(NOMURA …（0%）ノムラインターナショナルピーエルシー(NOMURA IN…（3.92%）野村アセットマネジメント（1.42%）野村證券（0.16%） |
| 01/21 | 925 | 932 | 916 | 922 | -0.86% | 106,500 | 299億2947万 | -6.21% |
| 01/20 | 945 | 970 | 918 | 930 | -5.78% | 466,000 | 301億8916万 | -5.58% |
| 01/19 | （5%ルール）大同特殊鋼（48.02%）大同興業（0.16%） |
| 01/19 | （IR情報）15:00 当社親会社である大同特殊鋼株式会社による当社株式に対する公開買付けの結果に関するお知らせ |
| 01/19 | 980 | 992 | 975 | 987 | -2.28% | 123,500 | 320億3946万 | +0.1% |
| 01/18 | 1,016 | 1,016 | 1,004 | 1,010 | 0% | 49,000 | 327億8607万 | +2.54% |
| 01/17 | 1,000 | 1,014 | 994 | 1,010 | +0.2% | 73,000 | 327億8607万 | +2.75% |
| 01/14 | 1,016 | 1,016 | 999 | 1,008 | -0.2% | 59,000 | 327億2115万 | +2.86% |
| 01/13 | 1,022 | 1,034 | 1,010 | 1,010 | -1.94% | 103,500 | 327億8607万 | +3.27% |
| 01/12 | 1,036 | 1,036 | 1,020 | 1,030 | 0% | 92,000 | 334億3530万 | +5.53% |
| 01/11 | 1,030 | 1,038 | 1,022 | 1,030 | +1.18% | 130,500 | 334億3530万 | +5.75% |
| 01/07 | 1,018 | 1,024 | 1,004 | 1,018 | +0.79% | 121,500 | 330億4577万 | +4.84% |
| 01/06 | 1,000 | 1,018 | 1,000 | 1,010 | -0.59% | 80,500 | 327億8607万 | +4.02% |
| 01/05 | 994 | 1,016 | 988 | 1,016 | +2.83% | 162,000 | 329億8084万 | +5.28% |
| 01/04 | 1,000 | 1,004 | 975 | 988 | -0.6% | 117,500 | 320億7192万 | +2.92% |
| 2021 |
| 12/30 | 984 | 1,004 | 984 | 994 | +1.02% | 47,000 | 322億6669万 | +3.97% |
| 12/29 | 982 | 988 | 976 | 984 | +0.2% | 48,500 | 319億4208万 | +3.36% |
| 12/28 | 980 | 987 | 980 | 982 | +0.2% | 43,500 | 318億7715万 | +3.48% |
| 12/27 | 980 | 1,000 | 975 | 980 | +0.62% | 156,500 | 318億1223万 | +3.59% |
| 12/24 | 960 | 978 | 959 | 974 | +1.56% | 126,500 | 316億1746万 | +3.29% |
| 12/23 | 957 | 960 | 956 | 959 | +0.21% | 108,000 | 311億3054万 | +1.91% |
| 12/22 | 957 | 959 | 955 | 957 | +0.21% | 81,000 | 310億6562万 | +1.92% |
| 12/21 | 956 | 958 | 955 | 955 | -0.1% | 127,500 | 310億69万 | +1.92% |
| 12/20 | 958 | 960 | 955 | 956 | -0.31% | 102,500 | 310億3316万 | +2.14% |
| 12/17 | 960 | 960 | 954 | 959 | -0.1% | 156,500 | 311億3054万 | +2.68% |
| 12/16 | 959 | 961 | 957 | 960 | +0.21% | 158,500 | 311億6300万 | +3% |
| 12/15 | 955 | 959 | 955 | 958 | +0.21% | 61,000 | 310億9808万 | +3.12% |
| 12/14 | 955 | 958 | 954 | 956 | +0.21% | 73,500 | 310億3316万 | +3.02% |
