| 2025 |
| 12/19 | (IR情報)15:30 当社株式の上場廃止に関するお知らせ |
| 12/19 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 23,400 | 456億9040万 | 0% |
| 12/18 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 10,500 | 456億9040万 | 0% |
| 12/17 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 7,600 | 456億9040万 | 0% |
| 12/16 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 5,900 | 456億9040万 | 0% |
| 12/15 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 15,000 | 456億9040万 | 0% |
| 12/12 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 8,300 | 456億9040万 | 0% |
| 12/11 | 1,393 | 1,394 | 1,393 | 1,393 | -0.07% | 4,900 | 456億9040万 | 0% |
| 12/10 | 1,393 | 1,394 | 1,393 | 1,394 | -0.07% | 29,500 | 457億2320万 | +0.07% |
| 12/09 | 1,393 | 1,395 | 1,393 | 1,395 | +0.07% | 20,100 | 457億5600万 | +0.14% |
| 12/08 | 1,394 | 1,394 | 1,393 | 1,394 | +0.07% | 6,000 | 457億2320万 | +0.07% |
| 12/05 | 1,393 | 1,394 | 1,393 | 1,393 | -0.07% | 13,900 | 456億9040万 | 0% |
| 12/04 | 1,393 | 1,394 | 1,393 | 1,394 | +0.07% | 18,000 | 457億2320万 | +0.07% |
| 12/03 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 10,300 | 456億9040万 | 0% |
| 12/02 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 9,900 | 456億9040万 | 0% |
| 12/01 | 1,393 | 1,394 | 1,392 | 1,393 | -0.07% | 26,300 | 456億9040万 | 0% |
| 11/28 | 1,393 | 1,394 | 1,392 | 1,394 | 0% | 30,900 | 457億2320万 | +0.07% |
| 11/27 | 1,393 | 1,395 | 1,393 | 1,394 | +0.07% | 35,700 | 457億2320万 | +0.07% |
| 11/26 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 113,100 | 456億9040万 | 0% |
| 11/25 | 1,393 | 1,399 | 1,393 | 1,393 | 0% | 71,100 | 456億9040万 | 0% |
| 11/21 | 1,393 | 1,395 | 1,392 | 1,393 | 0% | 75,000 | 456億9040万 | 0% |
| 11/20 | (IR情報)14:00 株式併合並びに単元株式数の定めの廃止及び定款の一部変更の承認決議に関するお知らせ |
| 11/20 | 1,394 | 1,397 | 1,393 | 1,393 | 0% | 35,600 | 456億9040万 | 0% |
| 11/19 | 1,393 | 1,397 | 1,392 | 1,393 | 0% | 78,300 | 456億9040万 | 0% |
| 11/18 | 1,393 | 1,393 | 1,393 | 1,393 | 0% | 6,700 | 456億9040万 | 0% |
| 11/17 | 1,393 | 1,394 | 1,392 | 1,393 | 0% | 32,800 | 456億9040万 | 0% |
| 11/14 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 11,200 | 456億9040万 | 0% |
| 11/13 | 1,393 | 1,394 | 1,391 | 1,393 | 0% | 39,500 | 456億9040万 | 0% |
| 11/12 | 1,393 | 1,395 | 1,393 | 1,393 | 0% | 14,700 | 456億9040万 | 0% |
| 11/11 | 1,393 | 1,394 | 1,392 | 1,393 | 0% | 38,200 | 456億9040万 | 0% |
| 11/10 | (IR情報)14:00 2026年3月期第2四半期(中間期)決算短信〔日本基準〕(連結) |
| 11/10 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 43,200 | 456億9040万 | 0% |
| 11/07 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 21,700 | 456億9040万 | 0% |
| 11/06 | 1,394 | 1,394 | 1,393 | 1,393 | 0% | 29,400 | 456億9040万 | +0.07% |
| 11/05 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 104,800 | 456億9040万 | +0.07% |
| 11/04 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 8,800 | 456億9040万 | +0.07% |
| 10/31 | 1,394 | 1,394 | 1,393 | 1,393 | 0% | 41,400 | 456億9040万 | +0.07% |
| 10/30 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 15,800 | 456億9040万 | +0.07% |
| 10/29 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 8,300 | 456億9040万 | +0.14% |
| 10/28 | 1,393 | 1,394 | 1,392 | 1,393 | +0.07% | 63,700 | 456億9040万 | +0.14% |
| 10/27 | 1,393 | 1,393 | 1,392 | 1,392 | -0.07% | 19,200 | 456億5760万 | +0.07% |
| 10/24 | 1,394 | 1,394 | 1,393 | 1,393 | 0% | 8,800 | 456億9040万 | +0.14% |
| 10/23 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 9,500 | 456億9040万 | +0.14% |
| 10/22 | 1,393 | 1,394 | 1,393 | 1,393 | 0% | 11,800 | 456億9040万 | +0.14% |
| 10/21 | 1,393 | 1,396 | 1,392 | 1,393 | 0% | 42,200 | 456億9040万 | +0.14% |
| 10/20 | 1,392 | 1,393 | 1,392 | 1,393 | 0% | 25,800 | 456億9040万 | +0.14% |
| 10/17 | 1,392 | 1,393 | 1,392 | 1,393 | +0.07% | 11,600 | 456億9040万 | +0.14% |
| 10/16 | 1,392 | 1,393 | 1,392 | 1,392 | 0% | 21,500 | 456億5760万 | +0.07% |
| 10/15 | (IR情報)15:30 株式併合並びに単元株式数の定めの廃止及び定款の一部変更に関する臨時株主総会開催のお知らせ |
| 10/15 | (IR情報)15:30 自己株式の消却に関するお知らせ |
| 10/15 | 1,392 | 1,394 | 1,392 | 1,392 | -0.07% | 66,100 | 456億5760万 | +0.07% |
| 10/14 | 1,392 | 1,393 | 1,392 | 1,393 | 0% | 59,800 | 456億9040万 | +0.14% |
| 10/10 | 1,392 | 1,393 | 1,392 | 1,393 | 0% | 38,500 | 456億9040万 | +0.14% |
| 10/09 | 1,392 | 1,393 | 1,392 | 1,393 | +0.07% | 47,900 | 456億9040万 | +0.07% |
| 10/08 | 1,392 | 1,394 | 1,392 | 1,392 | -0.07% | 36,700 | 456億5760万 | 0% |
| 10/07 | 1,392 | 1,393 | 1,392 | 1,393 | +0.07% | 90,400 | 456億9040万 | +0.07% |
| 10/06 | 1,392 | 1,392 | 1,390 | 1,392 | +0.07% | 65,900 | 456億5760万 | 0% |
| 10/03 | 1,391 | 1,392 | 1,391 | 1,391 | 0% | 36,900 | 456億2480万 | -0.07% |
| 10/02 | 1,390 | 1,391 | 1,390 | 1,391 | +0.22% | 33,900 | 456億2480万 | -0.14% |
| 10/01 | 1,388 | 1,390 | 1,388 | 1,388 | 0% | 21,200 | 455億2640万 | -0.36% |
| 09/30 | 1,387 | 1,389 | 1,386 | 1,388 | +0.29% | 119,500 | 455億2640万 | -0.36% |
| 09/29 | 1,389 | 1,391 | 1,384 | 1,384 | -0.36% | 800,900 | 453億9520万 | -0.72% |
| 09/26 | 1,390 | 1,392 | 1,389 | 1,389 | +0.07% | 31,100 | 455億5920万 | -0.36% |
| 09/25 | 1,390 | 1,390 | 1,388 | 1,388 | -0.14% | 57,200 | 455億2640万 | -0.5% |
| 09/24 | 1,391 | 1,392 | 1,388 | 1,390 | -0.07% | 53,900 | 455億9200万 | -0.36% |
| 09/22 | (5%ルール)野村證券(0%)野村アセットマネジメント(1.19%)ノムラインターナショナルピーエルシー(NOMURA IN…(0.66%) |
| 09/22 | 1,391 | 1,392 | 1,391 | 1,391 | -0.14% | 10,600 | 456億2480万 | -0.29% |
| 09/19 | 1,391 | 1,393 | 1,391 | 1,393 | +0.22% | 203,200 | 456億9040万 | -0.14% |
| 09/18 | 1,391 | 1,392 | 1,390 | 1,390 | -0.07% | 34,800 | 455億9200万 | -0.36% |
| 09/18 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 157,186株(0.47%)-0.04%義務消失 |
| 09/17 | 1,391 | 1,392 | 1,390 | 1,391 | 0% | 138,900 | 456億2480万 | -0.36% |
| 09/17 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 167,705株(0.51%)再IN |
| 09/16 | (5%ルール)AP78(33.12%)古河電気工業(57.26%)古河電工パワーシステムズ(0%)古河産業(0%) |
| 09/16 | 1,392 | 1,393 | 1,390 | 1,391 | -0.07% | 133,000 | 456億2480万 | -0.36% |
| 09/12 | (5%ルール)古河電気工業(57.26%)AP78(33.12%) |
| 09/12 | (5%ルール)古河電気工業(57.26%)AP78(33.12%) |
| 09/12 | 1,392 | 1,393 | 1,391 | 1,392 | 0% | 53,200 | 456億5760万 | -0.29% |
| 09/11 | (IR情報)9:30 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 |
| 09/11 | 1,392 | 1,393 | 1,391 | 1,392 | -0.07% | 80,700 | 456億5760万 | -0.29% |
| 09/10 | 1,393 | 1,394 | 1,392 | 1,393 | -0.07% | 54,100 | 456億9040万 | -0.21% |
| 09/09 | (IR情報)15:30 株式会社AP78による当社株式に対する公開買付けの結果並びに主要株主及びその他の関係会社の異動に関するお知らせ |
| 09/09 | 1,395 | 1,395 | 1,392 | 1,394 | -0.07% | 29,400 | 457億2320万 | -0.14% |
| 09/08 | 1,394 | 1,395 | 1,393 | 1,395 | +0.07% | 56,500 | 457億5600万 | -0.07% |
| 09/05 | 1,397 | 1,397 | 1,393 | 1,394 | -0.29% | 65,800 | 457億2320万 | -0.07% |
| 09/04 | 1,398 | 1,399 | 1,398 | 1,398 | 0% | 132,400 | 458億5440万 | +0.22% |
| 09/03 | 1,398 | 1,398 | 1,397 | 1,398 | +0.07% | 387,900 | 458億5440万 | +0.29% |
| 09/02 | 1,398 | 1,398 | 1,397 | 1,397 | -0.07% | 91,400 | 458億2160万 | +0.22% |
| 09/01 | 1,397 | 1,398 | 1,397 | 1,398 | +0.07% | 87,800 | 458億5440万 | +0.36% |
| 08/29 | 1,397 | 1,398 | 1,397 | 1,397 | -0.07% | 82,500 | 458億2160万 | +0.36% |
| 08/28 | 1,397 | 1,398 | 1,397 | 1,398 | +0.07% | 59,400 | 458億5440万 | +0.43% |
| 08/27 | 1,398 | 1,398 | 1,397 | 1,397 | 0% | 176,100 | 458億2160万 | +0.43% |
| 08/26 | 1,397 | 1,398 | 1,396 | 1,397 | +0.07% | 74,300 | 458億2160万 | +0.5% |
| 08/25 | 1,397 | 1,398 | 1,396 | 1,396 | -0.14% | 138,500 | 457億8880万 | +0.43% |
| 08/22 | 1,398 | 1,398 | 1,397 | 1,398 | 0% | 368,500 | 458億5440万 | +0.65% |
| 08/21 | 1,397 | 1,398 | 1,396 | 1,398 | +0.07% | 229,700 | 458億5440万 | +0.72% |
| 08/20 | 1,397 | 1,397 | 1,396 | 1,397 | +0.07% | 139,200 | 458億2160万 | +0.72% |
| 08/19 | 1,397 | 1,397 | 1,396 | 1,396 | -0.07% | 61,100 | 457億8880万 | +0.72% |
| 08/18 | 1,397 | 1,397 | 1,396 | 1,397 | 0% | 49,100 | 458億2160万 | +0.79% |
| 08/15 | 1,396 | 1,397 | 1,395 | 1,397 | +0.07% | 433,000 | 458億2160万 | +0.87% |
| 08/14 | 1,396 | 1,396 | 1,395 | 1,396 | 0% | 111,100 | 457億8880万 | +0.87% |
| 08/13 | 1,396 | 1,396 | 1,395 | 1,396 | +0.07% | 92,900 | 457億8880万 | +0.94% |
| 08/12 | 1,395 | 1,396 | 1,395 | 1,395 | -0.07% | 117,000 | 457億5600万 | +0.87% |
| 08/08 | 1,396 | 1,396 | 1,395 | 1,396 | +0.43% | 299,600 | 457億8880万 | +1.01% |
| 08/07 | (IR情報)16:30 2026年3月期第1四半期決算短信〔日本基準〕(連結) |
| 08/07 | (IR情報)16:30 株式会社AP78による当社株式に対する公開買付けに関する賛同の意見表明及び応募推奨のお知らせ |
| 08/07 | (IR情報)16:30 株式会社AP78による古河電池株式会社(証券コード:6937)の普通株式に対する公開買付けの開始に関するお知らせ |
| 08/07 | 1,390 | 1,391 | 1,387 | 1,390 | 0% | 131,500 | 455億9200万 | +0.65% |
| 08/06 | 1,390 | 1,390 | 1,389 | 1,390 | 0% | 59,500 | 455億9200万 | +0.65% |
| 08/05 | 1,390 | 1,391 | 1,389 | 1,390 | +0.07% | 52,300 | 455億9200万 | +0.72% |
| 08/04 | 1,387 | 1,390 | 1,386 | 1,389 | +0.14% | 38,800 | 455億5920万 | +0.65% |
| 08/01 | 1,385 | 1,388 | 1,385 | 1,387 | +0.14% | 49,800 | 454億9360万 | +0.51% |
| 07/31 | 1,385 | 1,387 | 1,385 | 1,385 | 0% | 82,100 | 454億2800万 | +0.44% |
| 07/30 | 1,383 | 1,386 | 1,383 | 1,385 | +0.14% | 80,200 | 454億2800万 | +0.44% |
| 07/29 | 1,382 | 1,385 | 1,382 | 1,383 | +0.14% | 116,600 | 453億6240万 | +0.29% |
| 07/28 | 1,380 | 1,383 | 1,380 | 1,381 | +0.07% | 29,600 | 452億9680万 | +0.15% |
| 07/25 | 1,381 | 1,382 | 1,380 | 1,380 | -0.22% | 39,900 | 452億6400万 | +0.07% |