| 2025 |
| 04/22 | (IR情報)15:30 当社株式の上場廃止のお知らせ |
| 04/22 | 2,744 | 2,752 | 2,742 | 2,744 | -0.07% | 62,800 | 1495億6805万 | +0.07% |
| 04/21 | 2,744 | 2,749 | 2,744 | 2,746 | -0.33% | 13,300 | 1496億7706万 | +0.15% |
| 04/18 | 2,747 | 2,755 | 2,745 | 2,755 | +0.07% | 23,900 | 1501億6763万 | +0.47% |
| 04/17 | 2,748 | 2,754 | 2,747 | 2,753 | +0.18% | 30,000 | 1500億5861万 | +0.44% |
| 04/16 | 2,745 | 2,755 | 2,745 | 2,748 | +0.11% | 40,100 | 1497億8607万 | +0.26% |
| 04/15 | 2,743 | 2,749 | 2,743 | 2,745 | 0% | 21,200 | 1496億2255万 | +0.15% |
| 04/14 | 2,745 | 2,796 | 2,743 | 2,745 | -0.18% | 55,400 | 1496億2255万 | +0.15% |
| 04/11 | 2,742 | 2,845 | 2,741 | 2,750 | +0.26% | 116,700 | 1498億9509万 | +0.33% |
| 04/10 | 2,742 | 2,743 | 2,741 | 2,743 | +0.07% | 46,500 | 1495億1354万 | +0.07% |
| 04/09 | 2,741 | 2,743 | 2,741 | 2,741 | 0% | 30,000 | 1494億452万 | 0% |
| 04/08 | 2,740 | 2,745 | 2,739 | 2,741 | +0.07% | 70,800 | 1494億452万 | -0.04% |
| 04/07 | 2,740 | 2,745 | 2,739 | 2,739 | +0.04% | 77,600 | 1492億9551万 | -0.11% |
| 04/04 | (5%ルール)日本製鉄(99.95%) |
| 04/04 | 2,738 | 2,744 | 2,738 | 2,738 | +0.04% | 155,700 | 1492億4100万 | -0.15% |
| 04/03 | 2,737 | 2,740 | 2,736 | 2,737 | 0% | 291,400 | 1491億8649万 | -0.18% |
| 04/02 | 2,736 | 2,740 | 2,736 | 2,737 | -0.04% | 541,800 | 1491億8649万 | -0.22% |
| 04/01 | 2,736 | 2,741 | 2,735 | 2,738 | +0.07% | 281,400 | 1492億4100万 | -0.18% |
| 03/31 | 2,740 | 2,741 | 2,735 | 2,736 | -0.15% | 500,800 | 1491億3199万 | -0.26% |
| 03/28 | (IR情報)16:00 日本製鉄株式会社による当社株式に係る株式売渡請求を行うことの決定、当該株式売渡請求に係る承認及び当社株式の上場廃止に関するお知らせ |
| 03/28 | (IR情報)16:00 臨時株主総会開催の中止及び基準日の取消しに関するお知らせ |
| 03/28 | 2,741 | 2,742 | 2,740 | 2,740 | -0.07% | 110,000 | 1493億5002万 | -0.11% |
| 03/27 | 2,740 | 2,743 | 2,739 | 2,742 | 0% | 170,600 | 1494億5903万 | -0.07% |
| 03/26 | (5%ルール)山陽特殊製鋼共栄会理事長濵田長伸(0%) |
| 03/26 | 2,739 | 2,742 | 2,739 | 2,742 | +0.11% | 135,300 | 1494億5903万 | -0.07% |
| 03/25 | (5%ルール)日本製鉄(92.12%) |
| 03/25 | 2,737 | 2,744 | 2,736 | 2,739 | +0.11% | 260,900 | 1492億9551万 | -0.18% |
| 03/24 | 2,740 | 2,744 | 2,736 | 2,736 | -0.18% | 604,100 | 1491億3199万 | -0.29% |
| 03/21 | (IR情報)12:30 代表取締役の異動に関するお知らせ |
| 03/21 | 2,738 | 2,743 | 2,737 | 2,741 | +0.04% | 108,400 | 1494億452万 | -0.11% |
| 03/19 | (IR情報)15:30 当社親会社である日本製鉄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 |
| 03/19 | 2,737 | 2,740 | 2,730 | 2,740 | +0.18% | 126,000 | 1493億5002万 | -0.18% |
| 03/18 | 2,739 | 2,742 | 2,735 | 2,735 | -0.15% | 82,500 | 1490億7748万 | -0.36% |
| 03/17 | 2,745 | 2,746 | 2,738 | 2,739 | -0.25% | 83,100 | 1492億9551万 | -0.25% |
| 03/14 | 2,745 | 2,748 | 2,745 | 2,746 | 0% | 215,300 | 1496億7706万 | 0% |
| 03/13 | 2,747 | 2,748 | 2,746 | 2,746 | -0.07% | 155,500 | 1496億7706万 | 0% |
| 03/12 | 2,747 | 2,749 | 2,745 | 2,748 | -0.07% | 119,400 | 1497億8607万 | +0.07% |
| 03/11 | 2,746 | 2,750 | 2,745 | 2,750 | +0.18% | 162,700 | 1498億9509万 | +0.51% |
| 03/10 | 2,746 | 2,747 | 2,745 | 2,745 | -0.04% | 192,400 | 1496億2255万 | +1.44% |
| 03/07 | (IR情報)16:00 (変更)「当社親会社である日本製鉄株式会社による当社株式に対する公開買付けに係る賛同の意見表明及び応募推奨に関するお知らせ」の一部変更について |
| 03/07 | 2,746 | 2,747 | 2,746 | 2,746 | -0.04% | 191,100 | 1496億7706万 | +2.69% |
| 03/06 | 2,748 | 2,749 | 2,746 | 2,747 | +0.04% | 139,800 | 1497億3157万 | +4.01% |
| 03/05 | 2,745 | 2,749 | 2,745 | 2,746 | +0.04% | 170,100 | 1496億7706万 | +5.37% |
| 03/04 | 2,745 | 2,746 | 2,745 | 2,745 | 0% | 126,900 | 1496億2255万 | +6.73% |
| 03/03 | 2,746 | 2,747 | 2,745 | 2,745 | 0% | 189,100 | 1496億2255万 | +8.2% |
| 02/28 | (IR情報)17:00 臨時株主総会招集のための基準日設定に関するお知らせ |
| 02/28 | 2,745 | 2,747 | 2,744 | 2,745 | +0.04% | 246,900 | 1496億2255万 | +9.71% |
| 02/27 | 2,745 | 2,746 | 2,744 | 2,744 | -0.04% | 291,200 | 1495億6805万 | +11.18% |
| 02/26 | 2,745 | 2,747 | 2,744 | 2,745 | -0.04% | 235,200 | 1496億2255万 | +12.78% |
| 02/25 | 2,744 | 2,748 | 2,744 | 2,746 | +0.07% | 171,300 | 1496億7706万 | +14.37% |
| 02/21 | 2,745 | 2,747 | 2,744 | 2,744 | -0.04% | 192,700 | 1495億6805万 | +15.93% |
| 02/20 | 2,744 | 2,747 | 2,744 | 2,745 | +0.04% | 229,800 | 1496億2255万 | +17.76% |
| 02/19 | (5%ルール)野村證券(0.74%)ノムラインターナショナルピーエルシー(NOMURA IN…(1.16%)野村アセットマネジメント(1.38%) |
| 02/19 | (IR情報)15:00 株主優待制度の廃止に関するお知らせ |
| 02/19 | (IR情報)15:00 (変更)「当社親会社である日本製鉄株式会社による当社株式に対する公開買付けに係る賛同の意見表明及び応募推奨に関するお知らせ」の一部変更について |
| 02/19 | 2,745 | 2,746 | 2,744 | 2,744 | 0% | 192,600 | 1495億6805万 | +19.46% |
| 02/18 | 2,744 | 2,745 | 2,743 | 2,744 | +0.04% | 262,200 | 1495億6805万 | +21.31% |
| 02/17 | 2,743 | 2,745 | 2,742 | 2,743 | 0% | 1,577,800 | 1495億1354万 | +23.11% |
| 02/14 | 2,746 | 2,747 | 2,743 | 2,743 | -0.11% | 388,700 | 1495億1354万 | +24.97% |
| 02/13 | 2,747 | 2,748 | 2,745 | 2,746 | -0.11% | 261,500 | 1496億7706万 | +27.01% |
| 02/12 | 2,747 | 2,749 | 2,746 | 2,749 | 0% | 356,700 | 1498億4058万 | +29.06% |
| 02/10 | 2,748 | 2,749 | 2,747 | 2,749 | +0.04% | 260,900 | 1498億4058万 | +30.9% |
| 02/07 | 2,748 | 2,750 | 2,747 | 2,748 | 0% | 468,000 | 1497億8607万 | +32.95% |
| 02/06 | 2,750 | 2,750 | 2,748 | 2,748 | 0% | 382,300 | 1497億8607万 | +35.17% |
| 02/05 | 2,750 | 2,752 | 2,748 | 2,748 | -0.07% | 566,200 | 1497億8607万 | +37.4% |
| 02/04 | 2,771 | 2,777 | 2,748 | 2,750 | +9.96% | 2,536,700 | 1498億9509万 | +40.09% |
| 02/03 | 2,501 | 2,501 | 2,501 | 2,501 | +24.99% | 86,900 | 1363億2277万 | +29.65% |
| 01/31 | (IR情報)16:00 2024年度第3四半期決算の概要 |
| 01/31 | (IR情報)16:00 2025年3月期期末配当予想の修正(無配)に関するお知らせ |
| 01/31 | (IR情報)16:00 当社株式に対する日本製鉄株式会社による公開買付けによる完全子会社化・非公開化 |
| 01/31 | (IR情報)16:00 当社親会社である日本製鉄株式会社による当社株式に対する公開買付けに係る賛同の意見表明及び応募推奨に関するお知らせ |
| 01/31 | (IR情報)16:00 2025年3月期第3四半期決算短信〔日本基準〕(連結) |
| 01/31 | 1,945 | 2,045 | 1,933 | 2,001 | +2.88% | 300,800 | 1090億6912万 | +5.43% |
| 01/30 | 1,872 | 1,945 | 1,865 | 1,945 | +2.26% | 145,500 | 1060億1671万 | +3.02% |
| 01/29 | 1,882 | 1,903 | 1,877 | 1,902 | +1.12% | 74,100 | 1036億7289万 | +1.12% |
| 01/28 | 1,878 | 1,894 | 1,876 | 1,881 | -0.9% | 67,000 | 1025億2824万 | +0.27% |
| 01/27 | 1,880 | 1,898 | 1,877 | 1,898 | +1.44% | 51,300 | 1034億5486万 | +1.44% |
| 01/24 | 1,886 | 1,886 | 1,851 | 1,871 | +0.32% | 122,200 | 1019億8317万 | +0.16% |
| 01/23 | 1,866 | 1,879 | 1,853 | 1,865 | -1.32% | 172,500 | 1016億5612万 | 0% |
| 01/22 | 1,902 | 1,902 | 1,886 | 1,890 | -1.25% | 89,000 | 1030億1881万 | +1.45% |
| 01/21 | 1,916 | 1,919 | 1,891 | 1,914 | 0% | 44,300 | 1043億2698万 | +2.9% |
| 01/20 | 1,881 | 1,914 | 1,876 | 1,914 | +1.75% | 71,800 | 1043億2698万 | +3.13% |
| 01/17 | 1,858 | 1,896 | 1,858 | 1,881 | +1.9% | 96,500 | 1025億2824万 | +1.62% |
| 01/16 | 1,924 | 1,925 | 1,846 | 1,846 | -3.25% | 117,800 | 1006億2048万 | 0% |
| 01/15 | 1,892 | 1,930 | 1,889 | 1,908 | +1.76% | 164,200 | 1039億9994万 | +3.47% |
| 01/14 | 1,875 | 1,884 | 1,855 | 1,875 | -0.85% | 62,700 | 1022億120万 | +1.96% |
| 01/10 | 1,912 | 1,921 | 1,884 | 1,891 | -1.05% | 68,200 | 1030億7331万 | +2.94% |
| 01/09 | 1,922 | 1,924 | 1,905 | 1,911 | -0.47% | 61,600 | 1041億6346万 | +4.2% |
| 01/08 | 1,936 | 1,954 | 1,912 | 1,920 | -0.83% | 73,300 | 1046億5402万 | +4.86% |
| 01/07 | 2,014 | 2,016 | 1,936 | 1,936 | -3.01% | 140,500 | 1055億2614万 | +5.97% |
| 01/06 | 1,939 | 2,008 | 1,927 | 1,996 | +3.53% | 137,800 | 1087億9658万 | +9.49% |
| 2024 |
| 12/30 | 1,920 | 1,956 | 1,920 | 1,928 | +0.84% | 95,300 | 1050億9008万 | +6.11% |
| 12/27 | 1,905 | 1,914 | 1,894 | 1,912 | +0.37% | 78,000 | 1042億1797万 | +5.46% |
| 12/26 | 1,835 | 1,910 | 1,833 | 1,905 | +3.36% | 140,700 | 1038億3641万 | +5.19% |
| 12/25 | 1,844 | 1,874 | 1,820 | 1,843 | -2.18% | 264,100 | 1004億5696万 | +1.88% |
| 12/24 | 1,752 | 1,890 | 1,752 | 1,884 | +8.46% | 334,800 | 1026億9176万 | +4.09% |
| 12/23 | 1,743 | 1,751 | 1,715 | 1,737 | -0.46% | 233,200 | 946億7919万 | -4.03% |
| 12/20 | 1,773 | 1,778 | 1,739 | 1,745 | -1.58% | 210,600 | 951億1525万 | -3.91% |
| 12/19 | 1,751 | 1,776 | 1,744 | 1,773 | +0.11% | 91,100 | 966億4145万 | -2.69% |
| 12/18 | 1,761 | 1,779 | 1,757 | 1,771 | +0.28% | 88,200 | 965億3244万 | -3.07% |
| 12/17 | 1,804 | 1,808 | 1,760 | 1,766 | -2.48% | 93,000 | 962億5990万 | -3.55% |
| 12/16 | 1,800 | 1,822 | 1,784 | 1,811 | +0.17% | 117,000 | 987億1273万 | -1.42% |
| 12/13 | 1,801 | 1,815 | 1,792 | 1,808 | -0.5% | 96,400 | 985億4921万 | -1.69% |
| 12/12 | 1,824 | 1,827 | 1,808 | 1,817 | +0.11% | 54,800 | 990億3977万 | -1.46% |
| 12/11 | 1,806 | 1,819 | 1,802 | 1,815 | +0.55% | 59,700 | 989億3076万 | -1.84% |
| 12/10 | 1,800 | 1,830 | 1,792 | 1,805 | +1.4% | 86,300 | 983億8568万 | -2.49% |
| 12/09 | 1,780 | 1,795 | 1,772 | 1,780 | +0.11% | 80,500 | 970億2300万 | -3.89% |
| 12/06 | 1,770 | 1,781 | 1,765 | 1,778 | +0.11% | 53,000 | 969億1399万 | -4.1% |
| 12/05 | 1,787 | 1,788 | 1,758 | 1,776 | -0.84% | 88,200 | 968億497万 | -4.46% |
| 12/04 | 1,829 | 1,837 | 1,790 | 1,791 | -2.56% | 87,500 | 976億2258万 | -3.71% |
| 12/03 | 1,812 | 1,849 | 1,812 | 1,838 | +1.43% | 60,000 | 1001億8443万 | -1.18% |
| 12/02 | 1,832 | 1,834 | 1,810 | 1,812 | -0.71% | 38,700 | 987億6724万 | -2.53% |
| 11/29 | 1,829 | 1,837 | 1,816 | 1,825 | -0.22% | 50,500 | 994億7583万 | -1.78% |
| 11/28 | 1,815 | 1,833 | 1,805 | 1,829 | +0.49% | 124,100 | 996億9386万 | -1.51% |
| 11/27 | 1,833 | 1,840 | 1,810 | 1,820 | -1.57% | 49,800 | 992億329万 | -2.05% |
| 11/26 | 1,833 | 1,849 | 1,809 | 1,849 | +0.49% | 98,100 | 1007億8401万 | -0.54% |
| 11/25 | 1,864 | 1,865 | 1,840 | 1,840 | -1.18% | 74,700 | 1002億9344万 | -1.02% |
| 11/22 | 1,860 | 1,875 | 1,853 | 1,862 | +0.11% | 36,400 | 1014億9260万 | +0.11% |