| 2026 |
| 01/28 | (IR情報)15:30 当社株式の上場廃止のお知らせ |
| 01/28 | 2,593 | 2,598 | 2,593 | 2,594 | +0.08% | 63,200 | 2698億8703万 | +0.08% |
| 01/27 | 2,592 | 2,595 | 2,592 | 2,592 | +0.04% | 56,100 | 2696億7895万 | 0% |
| 01/26 | 2,592 | 2,595 | 2,591 | 2,591 | -0.04% | 195,200 | 2695億7491万 | -0.04% |
| 01/23 | 2,592 | 2,595 | 2,590 | 2,592 | 0% | 164,100 | 2696億7895万 | 0% |
| 01/22 | 2,592 | 2,597 | 2,591 | 2,592 | -0.04% | 54,000 | 2696億7895万 | +0.04% |
| 01/21 | 2,593 | 2,595 | 2,592 | 2,593 | 0% | 18,300 | 2697億8299万 | +0.08% |
| 01/20 | 2,592 | 2,599 | 2,592 | 2,593 | +0.04% | 23,900 | 2697億8299万 | +0.08% |
| 01/19 | (5%ルール)アライドマテリアル(0%)日新電機(0%)住友電気工業(99.79%)住友電工焼結合金(0%)九州住電精密(0%) |
| 01/19 | 2,592 | 2,599 | 2,591 | 2,592 | +0.04% | 51,400 | 2696億7895万 | +0.04% |
| 01/16 | 2,591 | 2,594 | 2,591 | 2,591 | 0% | 75,100 | 2695億7491万 | 0% |
| 01/15 | 2,591 | 2,593 | 2,591 | 2,591 | +0.04% | 25,500 | 2695億7491万 | 0% |
| 01/14 | 2,591 | 2,592 | 2,590 | 2,590 | 0% | 52,100 | 2694億7086万 | -0.08% |
| 01/13 | 2,592 | 2,595 | 2,590 | 2,590 | 0% | 63,200 | 2694億7086万 | -0.08% |
| 01/09 | 2,590 | 2,596 | 2,590 | 2,590 | 0% | 66,300 | 2694億7086万 | -0.08% |
| 01/08 | 2,590 | 2,593 | 2,589 | 2,590 | 0% | 214,100 | 2694億7086万 | -0.08% |
| 01/07 | 2,591 | 2,594 | 2,589 | 2,590 | -0.04% | 174,500 | 2694億7086万 | -0.08% |
| 01/06 | 2,599 | 2,600 | 2,591 | 2,591 | -0.08% | 203,000 | 2695億7491万 | -0.08% |
| 01/05 | 2,600 | 2,603 | 2,593 | 2,593 | -0.92% | 78,300 | 2697億8299万 | 0% |
| 2025 |
| 12/30 | 2,610 | 2,630 | 2,593 | 2,617 | +0.27% | 126,400 | 2722億8002万 | +0.93% |
| 12/29 | 2,588 | 2,610 | 2,588 | 2,610 | +0.93% | 356,700 | 2715億5172万 | +0.69% |
| 12/26 | 2,585 | 2,594 | 2,585 | 2,586 | +0.12% | 721,600 | 2690億5469万 | -0.19% |
| 12/25 | 2,592 | 2,597 | 2,583 | 2,583 | -0.31% | 496,400 | 2687億4256万 | -0.31% |
| 12/24 | 2,591 | 2,595 | 2,582 | 2,591 | +0.08% | 812,000 | 2695億7491万 | -0.04% |
| 12/23 | (IR情報)15:30 (開示事項の経過)臨時株主総会の不開催及び基準日の取消しに関するお知らせ |
| 12/23 | (IR情報)15:30 住友電気工業株式会社による当社株式に対す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 |
| 12/23 | (5%ルール)マルヤス工業(0%) |
| 12/23 | 2,588 | 2,600 | 2,587 | 2,589 | +0.08% | 156,700 | 2693億6682万 | -0.12% |
| 12/22 | (5%ルール)住友電工焼結合金(0.18%)アライドマテリアル(0.2%)日新電機(0.13%)住電商事(0%)住友電気工業(91.17%)九州住電精密(0.18%) |
| 12/22 | 2,586 | 2,591 | 2,586 | 2,587 | +0.04% | 245,000 | 2691億5873万 | -0.19% |
| 12/19 | 2,588 | 2,593 | 2,586 | 2,586 | -0.08% | 736,500 | 2690億5469万 | -0.23% |
| 12/18 | 2,590 | 2,592 | 2,588 | 2,588 | -0.27% | 152,800 | 2692億6278万 | -0.15% |
| 12/17 | 2,595 | 2,598 | 2,592 | 2,595 | +0.19% | 82,400 | 2699億9108万 | +0.08% |
| 12/16 | (IR情報)15:30 支配株主である住友電気工業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 |
| 12/16 | 2,579 | 2,594 | 2,576 | 2,590 | +0.58% | 157,600 | 2694億7086万 | -0.08% |
| 12/15 | 2,582 | 2,592 | 2,575 | 2,575 | -0.16% | 161,500 | 2679億1022万 | -0.69% |
| 12/12 | 2,597 | 2,599 | 2,572 | 2,579 | -0.69% | 178,900 | 2683億2639万 | -0.54% |
| 12/11 | 2,600 | 2,601 | 2,596 | 2,597 | 0% | 222,800 | 2701億9916万 | +0.12% |
| 12/10 | 2,596 | 2,599 | 2,595 | 2,597 | +0.08% | 445,500 | 2701億9916万 | +0.12% |
| 12/09 | 2,596 | 2,597 | 2,595 | 2,595 | 0% | 274,500 | 2699億9108万 | +0.04% |
| 12/08 | (IR情報)15:30 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 |
| 12/08 | 2,595 | 2,597 | 2,594 | 2,595 | 0% | 758,000 | 2699億9108万 | 0% |
| 12/05 | 2,595 | 2,595 | 2,594 | 2,595 | +0.04% | 319,900 | 2699億9108万 | -0.04% |
| 12/04 | 2,595 | 2,595 | 2,594 | 2,594 | 0% | 366,100 | 2698億8703万 | +0.62% |
| 12/04 | (空売り報告)Morgan Stanley & Co. International plc 1,823株(0%)-1.06%義務消失 |
| 12/03 | 2,595 | 2,596 | 2,594 | 2,594 | 0% | 458,100 | 2698億8703万 | +1.25% |
| 12/03 | (空売り報告)Morgan Stanley & Co. International plc 1,110,203株(1.06%)新規 |
| 12/02 | 2,594 | 2,595 | 2,594 | 2,594 | 0% | 329,700 | 2698億8703万 | +1.73% |
| 12/01 | 2,595 | 2,598 | 2,593 | 2,594 | -0.15% | 512,300 | 2698億8703万 | +2.33% |
| 11/28 | 2,594 | 2,598 | 2,593 | 2,598 | +0.15% | 486,400 | 2703億320万 | +3.1% |
| 11/27 | 2,594 | 2,595 | 2,593 | 2,594 | +0.04% | 267,900 | 2698億8703万 | +3.64% |
| 11/26 | (IR情報)15:30 (訂正)「支配株主である住友電気工業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」の一部訂正について |
| 11/26 | 2,594 | 2,595 | 2,593 | 2,593 | 0% | 284,200 | 2697億8299万 | +4.39% |
| 11/25 | 2,596 | 2,597 | 2,593 | 2,593 | -0.12% | 572,400 | 2697億8299万 | +5.15% |
| 11/21 | 2,593 | 2,596 | 2,593 | 2,596 | +0.12% | 587,500 | 2700億9512万 | +6.13% |
| 11/20 | 2,594 | 2,595 | 2,592 | 2,593 | 0% | 473,200 | 2697億8299万 | +6.88% |
| 11/19 | 2,593 | 2,596 | 2,592 | 2,593 | +0.04% | 486,100 | 2697億8299万 | +7.82% |
| 11/18 | 2,594 | 2,595 | 2,592 | 2,592 | -0.12% | 274,700 | 2696億7895万 | +8.77% |
| 11/17 | 2,592 | 2,595 | 2,591 | 2,595 | +0.15% | 379,300 | 2699億9108万 | +9.82% |
| 11/14 | 2,592 | 2,593 | 2,591 | 2,591 | 0% | 434,400 | 2695億7491万 | +10.4% |
| 11/13 | 2,593 | 2,594 | 2,591 | 2,591 | -0.04% | 529,500 | 2695億7491万 | +11.2% |
| 11/12 | 2,592 | 2,594 | 2,591 | 2,592 | +0.04% | 531,400 | 2696億7895万 | +11.97% |
| 11/11 | 2,593 | 2,594 | 2,590 | 2,591 | -0.04% | 938,400 | 2695億7491万 | +12.7% |
| 11/10 | 2,595 | 2,597 | 2,592 | 2,592 | -0.12% | 422,900 | 2696億7895万 | +13.53% |
| 11/07 | 2,593 | 2,595 | 2,591 | 2,595 | +0.08% | 877,900 | 2699億9108万 | +14.52% |
| 11/06 | 2,599 | 2,602 | 2,593 | 2,593 | -0.27% | 454,100 | 2697億8299万 | +15.4% |
| 11/05 | 2,593 | 2,606 | 2,592 | 2,600 | +0.19% | 943,000 | 2705億1129万 | +16.54% |
| 11/04 | 2,602 | 2,608 | 2,593 | 2,595 | -0.84% | 1,369,500 | 2699億9108万 | +17.16% |
| 10/31 | 2,621 | 2,628 | 2,601 | 2,617 | +0.08% | 1,762,800 | 2722億8002万 | +18.9% |
| 10/30 | (IR情報)12:00 通期連結業績予想の修正及び剰余金の配当(中間配当・増配)並びに期末配当予想の修正(無配)に関するお知らせ |
| 10/30 | (IR情報)12:00 2026年3月期中間期決算補足資料 |
| 10/30 | (IR情報)12:00 2026年3月期第2四半期(中間期)決算短信〔IFRS〕(連結) |
| 10/30 | (IR情報)12:00 支配株主である住友電気工業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 |
| 10/30 | 2,170 | 2,626 | 2,154 | 2,615 | +21.29% | 2,921,400 | 2720億7193万 | +19.62% |
| 10/29 | 2,200 | 2,201 | 2,155 | 2,156 | -1.28% | 119,400 | 2243億1628万 | -0.69% |
| 10/28 | 2,268 | 2,284 | 2,177 | 2,184 | -4.8% | 118,500 | 2272億2948万 | +0.51% |
| 10/27 | 2,260 | 2,299 | 2,247 | 2,294 | +3.29% | 166,500 | 2386億7419万 | +5.52% |
| 10/24 | 2,232 | 2,239 | 2,211 | 2,221 | -0.18% | 100,700 | 2310億7907万 | +2.21% |
| 10/23 | 2,187 | 2,231 | 2,184 | 2,225 | +2.35% | 134,100 | 2314億9524万 | +2.3% |
| 10/22 | 2,136 | 2,202 | 2,136 | 2,174 | +2.45% | 191,600 | 2261億8906万 | -0.09% |
| 10/21 | 2,148 | 2,160 | 2,120 | 2,122 | -0.38% | 93,100 | 2207億7883万 | -2.57% |
| 10/20 | 2,150 | 2,150 | 2,116 | 2,130 | +1.38% | 69,400 | 2216億1117万 | -2.43% |
| 10/17 | 2,093 | 2,111 | 2,086 | 2,101 | +0.05% | 80,100 | 2185億9393万 | -3.98% |
| 10/16 | 2,080 | 2,109 | 2,080 | 2,100 | +1.25% | 85,200 | 2184億8989万 | -4.33% |
| 10/15 | 2,056 | 2,084 | 2,056 | 2,074 | +2.02% | 91,100 | 2157億8477万 | -5.77% |
| 10/14 | 2,054 | 2,089 | 2,027 | 2,033 | -3.37% | 173,700 | 2115億1902万 | -7.93% |
| 10/10 | 2,139 | 2,147 | 2,091 | 2,104 | -3.66% | 149,200 | 2189億606万 | -5.01% |
| 10/09 | 2,187 | 2,197 | 2,156 | 2,184 | +0.41% | 153,300 | 2272億2948万 | -1.53% |
| 10/08 | 2,220 | 2,238 | 2,173 | 2,175 | -1.63% | 214,700 | 2262億9310万 | -1.89% |
| 10/07 | 2,205 | 2,226 | 2,178 | 2,211 | +0.64% | 152,500 | 2300億3864万 | -0.27% |
| 10/06 | 2,276 | 2,300 | 2,186 | 2,197 | +0.27% | 226,400 | 2285億8204万 | -0.9% |
| 10/03 | 2,163 | 2,194 | 2,161 | 2,191 | +2.05% | 122,000 | 2279億5778万 | -1.17% |
| 10/02 | 2,131 | 2,158 | 2,123 | 2,147 | +0.75% | 112,900 | 2233億7990万 | -3.11% |
| 10/01 | 2,175 | 2,179 | 2,115 | 2,131 | -3.4% | 120,500 | 2217億1521万 | -3.84% |
| 09/30 | 2,201 | 2,215 | 2,174 | 2,206 | +0.41% | 124,300 | 2295億1843万 | -0.5% |
| 09/29 | 2,210 | 2,224 | 2,196 | 2,197 | -1.92% | 100,400 | 2285億8204万 | -0.77% |
| 09/26 | 2,233 | 2,246 | 2,217 | 2,240 | +0.31% | 152,400 | 2330億5588万 | +1.36% |
| 09/25 | 2,237 | 2,251 | 2,227 | 2,233 | 0% | 112,400 | 2323億2758万 | +1.32% |
| 09/24 | 2,205 | 2,241 | 2,194 | 2,233 | +1% | 134,800 | 2323億2758万 | +1.55% |
| 09/22 | 2,219 | 2,225 | 2,201 | 2,211 | -0.05% | 106,600 | 2300億3864万 | +0.87% |
| 09/19 | 2,253 | 2,275 | 2,186 | 2,212 | -2.3% | 365,700 | 2301億4268万 | +1.19% |
| 09/18 | 2,260 | 2,268 | 2,235 | 2,264 | -0.18% | 107,400 | 2355億5291万 | +3.95% |
| 09/17 | 2,265 | 2,275 | 2,235 | 2,268 | +0.18% | 123,400 | 2359億6908万 | +4.61% |
| 09/16 | 2,213 | 2,268 | 2,213 | 2,264 | +2.3% | 118,300 | 2355億5291万 | +4.91% |
| 09/12 | 2,254 | 2,260 | 2,212 | 2,213 | -1.86% | 208,700 | 2302億4672万 | +3.07% |
| 09/11 | 2,253 | 2,269 | 2,230 | 2,255 | -0.31% | 136,500 | 2346億1652万 | +5.52% |
| 09/10 | 2,268 | 2,272 | 2,246 | 2,262 | -0.26% | 116,800 | 2353億4482万 | +6.45% |
| 09/09 | 2,271 | 2,280 | 2,241 | 2,268 | +0.44% | 108,700 | 2359億6908万 | +7.39% |
| 09/08 | 2,264 | 2,267 | 2,230 | 2,258 | +0.49% | 223,900 | 2349億2865万 | +7.68% |
| 09/05 | 2,218 | 2,255 | 2,185 | 2,247 | +2.51% | 140,400 | 2337億8418万 | +7.82% |
| 09/04 | 2,195 | 2,200 | 2,164 | 2,192 | +0.18% | 105,700 | 2280億6183万 | +5.84% |
| 09/03 | 2,186 | 2,215 | 2,175 | 2,188 | +0.69% | 179,800 | 2276億4565万 | +6.32% |
| 09/02 | 2,184 | 2,184 | 2,151 | 2,173 | +0.32% | 106,000 | 2260億8501万 | +6.31% |
| 09/01 | 2,202 | 2,202 | 2,146 | 2,166 | -1.95% | 138,900 | 2253億5671万 | +6.65% |
| 08/29 | 2,161 | 2,228 | 2,160 | 2,209 | +0.64% | 225,400 | 2298億3055万 | +9.46% |