| 2021 |
| 07/14 | 1,062 | 1,074 | 1,060 | 1,064 | -1.3% | 178,000 | 2311億4745万 | -2.03% |
| 07/13 | 1,072 | 1,080 | 1,068 | 1,078 | +1.13% | 261,500 | 2341億8886万 | -0.92% |
| 07/12 | 1,068 | 1,076 | 1,060 | 1,066 | +3.29% | 532,000 | 2315億8193万 | -2.02% |
| 07/09 | 1,030 | 1,034 | 1,006 | 1,032 | -1.71% | 769,500 | 2241億9564万 | -5.15% |
| 07/08 | 1,060 | 1,068 | 1,050 | 1,050 | -1.32% | 401,000 | 2281億603万 | -3.85% |
| 07/07 | 1,060 | 1,080 | 1,058 | 1,064 | -2.21% | 329,000 | 2311億4745万 | -2.83% |
| 07/06 | 1,092 | 1,098 | 1,086 | 1,088 | 0% | 138,000 | 2363億6130万 | -0.91% |
| 07/05 | 1,100 | 1,100 | 1,084 | 1,088 | -1.45% | 183,000 | 2363億6130万 | -1% |
| 07/02 | 1,094 | 1,108 | 1,088 | 1,104 | +1.66% | 338,000 | 2398億3720万 | +0.55% |
| 07/01 | 1,092 | 1,102 | 1,074 | 1,086 | -1.09% | 294,500 | 2359億2681万 | -1.09% |
| 06/30 | 1,104 | 1,108 | 1,086 | 1,098 | +0.92% | 454,500 | 2385億3374万 | +0.18% |
| 06/29 | 1,096 | 1,100 | 1,076 | 1,088 | -2.16% | 496,000 | 2363億6130万 | -0.55% |
| 06/28 | 1,110 | 1,122 | 1,104 | 1,112 | +0.91% | 457,000 | 2415億7515万 | +1.55% |
| 06/25 | 1,094 | 1,106 | 1,084 | 1,102 | +2.61% | 518,000 | 2394億271万 | +0.82% |
| 06/25 | 9:00 2023中期経営計画 |
| 06/25 | 9:00 大同特殊鋼グループ2023中期経営計画について |
| 06/24 | 1,056 | 1,086 | 1,054 | 1,074 | +1.32% | 408,000 | 2333億1988万 | -1.56% |
| 06/23 | 1,080 | 1,082 | 1,060 | 1,060 | -2.93% | 414,000 | 2302億7847万 | -2.84% |
| 06/22 | 1,082 | 1,092 | 1,076 | 1,092 | +3.61% | 480,000 | 2372億3027万 | -0.09% |
| 06/21 | 1,050 | 1,058 | 1,044 | 1,054 | -2.04% | 523,000 | 2289億7501万 | -3.66% |
| 06/18 | 1,090 | 1,090 | 1,072 | 1,076 | -2.36% | 580,000 | 2337億5437万 | -1.91% |
| 06/17 | 1,106 | 1,112 | 1,096 | 1,102 | -0.36% | 282,000 | 2394億271万 | +0.18% |
| 06/16 | 1,116 | 1,126 | 1,106 | 1,106 | -1.78% | 372,000 | 2402億7169万 | +0.45% |
| 06/15 | 1,124 | 1,128 | 1,114 | 1,126 | -0.18% | 424,000 | 2446億1656万 | +2.09% |
| 06/14 | 1,122 | 1,136 | 1,106 | 1,128 | +1.26% | 454,500 | 2450億5105万 | +1.81% |
| 06/11 | 1,100 | 1,126 | 1,094 | 1,114 | +0.72% | 408,500 | 2420億964万 | +0.27% |
| 06/10 | 1,098 | 1,114 | 1,090 | 1,106 | 0% | 398,500 | 2402億7169万 | -0.63% |
| 06/09 | 1,096 | 1,112 | 1,092 | 1,106 | +2.41% | 790,500 | 2402億7169万 | -0.63% |
| 06/08 | 1,054 | 1,088 | 1,054 | 1,080 | +2.08% | 1,085,000 | 2346億2335万 | -2.7% |
| 06/07 | 1,100 | 1,100 | 1,050 | 1,058 | -7.19% | 1,473,000 | 2298億4398万 | -4.25% |
| 06/04 | 1,138 | 1,146 | 1,120 | 1,140 | +1.24% | 659,000 | 2476億5798万 | +3.54% |
| 06/03 | 1,124 | 1,136 | 1,106 | 1,126 | -1.57% | 518,500 | 2446億1656万 | +2.93% |
| 06/02 | 1,120 | 1,148 | 1,110 | 1,144 | +4.19% | 876,500 | 2485億2695万 | +5.24% |
| 06/01 | 1,102 | 1,106 | 1,084 | 1,098 | +1.48% | 475,000 | 2385億3374万 | +1.76% |
| 05/31 | 1,100 | 1,100 | 1,076 | 1,082 | -0.37% | 441,500 | 2350億5784万 | +0.84% |
| 05/28 | 1,086 | 1,106 | 1,076 | 1,086 | +3.82% | 820,500 | 2359億2681万 | +1.69% |
| 05/27 | 1,050 | 1,070 | 1,044 | 1,046 | -0.95% | 711,000 | 2272億3706万 | -1.78% |
| 05/26 | 1,058 | 1,070 | 1,048 | 1,056 | -3.47% | 571,000 | 2294億950万 | -0.66% |
| 05/25 | 1,074 | 1,102 | 1,062 | 1,094 | +2.82% | 612,000 | 2376億6476万 | +3.11% |
| 05/24 | 1,060 | 1,092 | 1,060 | 1,064 | -0.37% | 380,000 | 2311億4745万 | +0.66% |
| 05/21 | 1,052 | 1,068 | 1,030 | 1,068 | 0% | 875,500 | 2320億1642万 | +1.23% |
| 05/20 | 1,084 | 1,084 | 1,048 | 1,068 | -3.26% | 885,000 | 2320億1642万 | +1.52% |
| 05/19 | 1,114 | 1,124 | 1,102 | 1,104 | -1.43% | 449,000 | 2398億3720万 | +5.24% |
| 05/18 | 1,130 | 1,130 | 1,104 | 1,120 | -0.88% | 517,500 | 2433億1310万 | +7.28% |
| 05/17 | 1,142 | 1,152 | 1,118 | 1,130 | -0.88% | 353,000 | 2454億8554万 | +8.86% |
| 05/14 | 1,168 | 1,174 | 1,124 | 1,140 | 0% | 616,000 | 2476億5798万 | +10.47% |
| 05/13 | 1,142 | 1,184 | 1,136 | 1,140 | -1.89% | 500,000 | 2476億5798万 | +11.11% |
| 05/12 | 15:00 当社の株券等の大規模買付行為に関する対応方針(買収防衛策)の非継続(廃止)について |
| 05/12 | 1,220 | 1,220 | 1,146 | 1,162 | -5.68% | 827,000 | 2524億3734万 | +13.92% |
| 05/11 | 1,238 | 1,266 | 1,228 | 1,232 | +0.82% | 1,268,500 | 2676億4441万 | +21.62% |
| 05/10 | 1,188 | 1,242 | 1,186 | 1,222 | +6.08% | 1,466,500 | 2654億7197万 | +21.59% |
| 05/07 | 1,118 | 1,160 | 1,102 | 1,152 | +3.6% | 925,500 | 2502億6490万 | +15.55% |
| 05/06 | 1,076 | 1,138 | 1,074 | 1,112 | +7.34% | 1,975,000 | 2415億7515万 | +12.1% |
| 04/30 | 13:00 2021年3月期決算説明会 |
| 04/30 | 13:00 役員の異動に関するお知らせ |
| 04/30 | 13:00 2021年3月期決算短信〔日本基準〕(連結) |
| 04/30 | 13:00 業績予想と実績との差異および剰余金の配当に関するお知らせ |
| 04/30 | 948 | 1,046 | 948 | 1,036 | +9.63% | 2,205,500 | 2250億6462万 | +4.86% |
| 04/28 | 949 | 949 | 936 | 945 | -1.15% | 392,500 | 2052億9543万 | -4.16% |
| 04/27 | 954 | 969 | 941 | 956 | -0.42% | 338,000 | 2076億8511万 | -3.14% |
| 04/26 | 960 | 965 | 949 | 960 | +1.37% | 185,500 | 2085億5409万 | -2.83% |
| 04/23 | 946 | 954 | 938 | 947 | -0.63% | 304,500 | 2057億2992万 | -4.44% |
| 04/22 | 963 | 964 | 950 | 953 | +1.38% | 238,500 | 2070億3338万 | -4.12% |
| 04/21 | 951 | 954 | 933 | 940 | -3.09% | 280,500 | 2042億921万 | -5.72% |
| 04/20 | 988 | 990 | 966 | 970 | -2.9% | 405,000 | 2107億2652万 | -3% |
| 04/19 | 1,000 | 1,002 | 988 | 999 | 0% | 175,000 | 2170億2660万 | -0.3% |
| 04/16 | 991 | 1,000 | 990 | 999 | -0.5% | 159,000 | 2170億2660万 | -0.3% |
| 04/15 | 1,002 | 1,018 | 1,000 | 1,004 | +0.7% | 196,000 | 2181億1282万 | +0.2% |
| 04/14 | 1,002 | 1,006 | 990 | 997 | -2.06% | 332,000 | 2165億9211万 | -0.3% |
| 04/13 | 1,000 | 1,024 | 995 | 1,018 | +1.6% | 345,500 | 2211億5423万 | +2% |
| 04/12 | 992 | 1,010 | 988 | 1,002 | +2.45% | 507,000 | 2176億7833万 | +0.6% |
| 04/09 | 974 | 990 | 971 | 978 | +0.31% | 390,500 | 2124億6448万 | -1.51% |
| 04/08 | 979 | 982 | 966 | 975 | -0.91% | 258,500 | 2118億1274万 | -1.52% |
| 04/07 | 972 | 986 | 971 | 984 | +0.92% | 278,000 | 2137億6794万 | -0.4% |
| 04/06 | 988 | 1,000 | 968 | 975 | -1.22% | 355,000 | 2118億1274万 | -1.02% |
| 04/05 | 986 | 995 | 976 | 987 | +0.41% | 183,000 | 2144億1967万 | +0.51% |
| 04/02 | 1,012 | 1,012 | 973 | 983 | -1.4% | 228,500 | 2135億5069万 | +0.41% |
| 04/01 | 1,018 | 1,024 | 991 | 997 | -2.45% | 429,500 | 2165億9211万 | +2.26% |
| 03/31 | 1,014 | 1,034 | 1,010 | 1,022 | -0.97% | 467,500 | 2220億2320万 | +5.25% |
| 03/30 | 1,026 | 1,036 | 1,020 | 1,032 | -0.19% | 488,500 | 2241億9564万 | +6.83% |
| 03/29 | 1,030 | 1,036 | 1,016 | 1,034 | +2.78% | 749,000 | 2246億3013万 | +7.37% |
| 03/26 | 1,002 | 1,010 | 997 | 1,006 | +1.41% | 351,500 | 2185億4730万 | +4.9% |
| 03/25 | 981 | 1,000 | 980 | 992 | +3.33% | 406,000 | 2155億589万 | +3.77% |
| 03/24 | 983 | 983 | 956 | 960 | -3.52% | 583,500 | 2085億5409万 | +0.52% |
| 03/23 | 1,002 | 1,020 | 995 | 995 | -2.07% | 379,000 | 2161億5762万 | +4.3% |
| 03/22 | 1,014 | 1,026 | 1,002 | 1,016 | -0.97% | 287,000 | 2207億1974万 | +6.61% |
| 03/19 | 1,028 | 1,028 | 1,004 | 1,026 | -0.77% | 746,000 | 2228億9218万 | +8% |
| 03/18 | 1,036 | 1,040 | 1,014 | 1,034 | +1.17% | 646,000 | 2246億3013万 | +9.19% |
| 03/17 | 1,006 | 1,032 | 1,002 | 1,022 | +0.59% | 523,500 | 2220億2320万 | +8.26% |
| 03/16 | 1,010 | 1,038 | 1,004 | 1,016 | +0.99% | 611,500 | 2207億1974万 | +7.86% |
| 03/15 | 1,000 | 1,008 | 990 | 1,006 | +2.55% | 513,000 | 2185億4730万 | +7.14% |
| 03/12 | 978 | 987 | 967 | 981 | +1.24% | 654,500 | 2131億1621万 | +4.81% |
| 03/11 | 960 | 974 | 957 | 969 | +2.11% | 448,000 | 2105億928万 | +3.64% |
| 03/10 | 952 | 957 | 942 | 949 | -0.84% | 381,000 | 2061億6440万 | +1.5% |
| 03/09 | 951 | 958 | 940 | 957 | +2.79% | 602,500 | 2079億235万 | +2.46% |
| 03/08 | 926 | 942 | 920 | 931 | +2.08% | 448,000 | 2022億5401万 | +0.11% |
| 03/05 | 899 | 912 | 894 | 912 | +0.11% | 427,500 | 1981億2638万 | -1.62% |
| 03/04 | 906 | 919 | 892 | 911 | -1.19% | 245,500 | 1979億914万 | -1.41% |
| 03/03 | 904 | 923 | 885 | 922 | +3.13% | 302,500 | 2002億9882万 | +0.11% |
| 03/02 | 913 | 913 | 890 | 894 | -1.54% | 329,000 | 1942億1599万 | -2.61% |
| 03/01 | 888 | 908 | 882 | 908 | +3.53% | 363,000 | 1972億5741万 | -0.98% |
| 02/26 | 891 | 902 | 877 | 877 | -3.41% | 509,000 | 1905億2285万 | -4.15% |
| 02/25 | 923 | 923 | 908 | 908 | +1% | 288,500 | 1972億5741万 | -0.77% |
| 02/24 | 930 | 938 | 899 | 899 | -4.26% | 545,500 | 1953億221万 | -1.53% |
| 02/22 | 958 | 961 | 939 | 939 | 0% | 276,500 | 2039億9197万 | +2.85% |
| 02/19 | 928 | 944 | 928 | 939 | -0.32% | 294,500 | 2039億9197万 | +2.96% |
| 02/18 | 957 | 963 | 941 | 942 | -1.57% | 299,000 | 2046億4370万 | +3.4% |
