| 2025 |
| 02/18 | (IR情報)15:30 当社株式の上場廃止のお知らせ |
| 02/18 | 1,643 | 1,644 | 1,643 | 1,643 | 0% | 17,200 | 144億7282万 | 0% |
| 02/17 | 1,643 | 1,643 | 1,643 | 1,643 | 0% | 9,400 | 144億7282万 | 0% |
| 02/14 | (IR情報)15:30 2025年3月期第3四半期決算短信〔日本基準〕(連結) |
| 02/14 | 1,643 | 1,644 | 1,643 | 1,643 | 0% | 6,200 | 144億7282万 | 0% |
| 02/13 | 1,643 | 1,643 | 1,643 | 1,643 | -0.06% | 4,300 | 144億7282万 | 0% |
| 02/12 | 1,643 | 1,644 | 1,643 | 1,644 | +0.06% | 5,100 | 144億8163万 | +0.06% |
| 02/10 | 1,643 | 1,644 | 1,643 | 1,643 | -0.06% | 11,500 | 144億7282万 | 0% |
| 02/07 | 1,643 | 1,644 | 1,643 | 1,644 | 0% | 18,700 | 144億8163万 | +0.06% |
| 02/06 | 1,643 | 1,644 | 1,643 | 1,644 | +0.06% | 14,700 | 144億8163万 | +0.06% |
| 02/05 | 1,643 | 1,644 | 1,643 | 1,643 | -0.06% | 3,000 | 144億7282万 | 0% |
| 02/04 | 1,643 | 1,644 | 1,643 | 1,644 | +0.06% | 7,500 | 144億8163万 | +0.06% |
| 02/03 | 1,643 | 1,644 | 1,643 | 1,643 | 0% | 9,600 | 144億7282万 | 0% |
| 01/31 | (IR情報)15:30 株式併合、単元株式数の定めの廃止、定款の一部変更及び資本金の額の減少に係る承認決議に関するお知らせ |
| 01/31 | 1,644 | 1,644 | 1,642 | 1,643 | 0% | 2,700 | 144億7282万 | 0% |
| 01/30 | 1,644 | 1,644 | 1,643 | 1,643 | 0% | 19,200 | 144億7282万 | 0% |
| 01/29 | 1,644 | 1,644 | 1,643 | 1,643 | -0.06% | 1,000 | 144億7282万 | 0% |
| 01/28 | 1,643 | 1,644 | 1,643 | 1,644 | +0.06% | 2,700 | 144億8163万 | +0.06% |
| 01/27 | 1,643 | 1,644 | 1,643 | 1,643 | 0% | 3,300 | 144億7282万 | 0% |
| 01/24 | 1,643 | 1,644 | 1,643 | 1,643 | -0.06% | 1,500 | 144億7282万 | 0% |
| 01/23 | 1,643 | 1,644 | 1,642 | 1,644 | 0% | 4,500 | 144億8163万 | +0.06% |
| 01/22 | 1,643 | 1,644 | 1,643 | 1,644 | 0% | 2,000 | 144億8163万 | +0.12% |
| 01/21 | 1,643 | 1,644 | 1,642 | 1,644 | 0% | 5,400 | 144億8163万 | +0.12% |
| 01/20 | 1,642 | 1,644 | 1,642 | 1,644 | +0.06% | 3,700 | 144億8163万 | +0.12% |
| 01/17 | 1,643 | 1,644 | 1,643 | 1,643 | 0% | 3,100 | 144億7282万 | +0.06% |
| 01/16 | 1,643 | 1,644 | 1,643 | 1,643 | 0% | 2,100 | 144億7282万 | +0.06% |
| 01/15 | 1,642 | 1,643 | 1,642 | 1,643 | -0.06% | 2,200 | 144億7282万 | +0.06% |
| 01/14 | 1,643 | 1,644 | 1,643 | 1,644 | 0% | 2,900 | 144億8163万 | +0.12% |
| 01/10 | 1,643 | 1,644 | 1,642 | 1,644 | +0.06% | 3,200 | 144億8163万 | +0.12% |
| 01/09 | 1,642 | 1,643 | 1,642 | 1,643 | 0% | 2,400 | 144億7282万 | +0.06% |
| 01/08 | 1,642 | 1,643 | 1,642 | 1,643 | -0.06% | 4,700 | 144億7282万 | +0.06% |
| 01/07 | 1,643 | 1,644 | 1,642 | 1,644 | +0.06% | 3,300 | 144億8163万 | +0.12% |
| 01/06 | (IR情報)15:30 株式併合、単元株式数の定めの廃止、定款の一部変更及び資本金の額の減少に関する臨時株主総会開催のお知らせ |
| 01/06 | 1,642 | 1,644 | 1,641 | 1,643 | -0.06% | 4,800 | 144億7282万 | +0.06% |
| 2024 |
| 12/30 | 1,641 | 1,644 | 1,641 | 1,644 | +0.06% | 4,800 | 144億8163万 | +0.12% |
| 12/27 | 1,641 | 1,643 | 1,641 | 1,643 | +0.12% | 2,700 | 144億7282万 | +0.06% |
| 12/26 | 1,641 | 1,642 | 1,641 | 1,641 | -0.06% | 4,000 | 144億5520万 | -0.06% |
| 12/25 | 1,641 | 1,642 | 1,641 | 1,642 | +0.06% | 2,900 | 144億6401万 | 0% |
| 12/24 | 1,642 | 1,642 | 1,641 | 1,641 | -0.06% | 1,700 | 144億5520万 | -0.06% |
| 12/23 | 1,641 | 1,642 | 1,641 | 1,642 | +0.06% | 3,000 | 144億6401万 | 0% |
| 12/20 | 1,641 | 1,642 | 1,641 | 1,641 | 0% | 1,600 | 144億5520万 | -0.06% |
| 12/19 | 1,641 | 1,642 | 1,641 | 1,641 | 0% | 2,200 | 144億5520万 | -0.06% |
| 12/18 | 1,641 | 1,642 | 1,641 | 1,641 | 0% | 4,100 | 144億5520万 | -0.06% |
| 12/17 | (5%ルール)常磐開発(0%) |
| 12/17 | 1,641 | 1,642 | 1,641 | 1,641 | 0% | 3,900 | 144億5520万 | -0.06% |
| 12/16 | 1,641 | 1,642 | 1,641 | 1,641 | -0.06% | 6,800 | 144億5520万 | -0.06% |
| 12/13 | 1,641 | 1,642 | 1,640 | 1,642 | +0.12% | 7,400 | 144億6401万 | 0% |
| 12/12 | 1,644 | 1,644 | 1,640 | 1,640 | +0.12% | 11,200 | 144億4639万 | -0.12% |
| 12/11 | (5%ルール)Ontario(87.87%) |
| 12/11 | (IR情報)15:30 支配株主であるOntario合同会社による当社株式に対する公開買付け(第二回)の結果に関するお知らせ |
| 12/11 | 1,638 | 1,640 | 1,638 | 1,638 | -0.06% | 5,500 | 144億2877万 | -0.24% |
| 12/10 | 1,642 | 1,643 | 1,637 | 1,639 | -0.24% | 54,500 | 144億3758万 | -0.18% |
| 12/09 | 1,642 | 1,643 | 1,642 | 1,643 | +0.06% | 4,300 | 144億7282万 | +0.06% |
| 12/06 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 5,900 | 144億6401万 | 0% |
| 12/05 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 3,100 | 144億6401万 | 0% |
| 12/04 | 1,642 | 1,643 | 1,642 | 1,642 | -0.06% | 6,000 | 144億6401万 | 0% |
| 12/03 | (IR情報)13:30 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 |
| 12/03 | 1,642 | 1,644 | 1,642 | 1,643 | +0.06% | 9,900 | 144億7282万 | 0% |
| 12/02 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 8,400 | 144億6401万 | -0.06% |
| 11/29 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 16,300 | 144億6401万 | -0.06% |
| 11/28 | 1,642 | 1,644 | 1,642 | 1,642 | -0.06% | 36,500 | 144億6401万 | -0.06% |
| 11/27 | 1,642 | 1,643 | 1,642 | 1,643 | 0% | 4,400 | 144億7282万 | -0.06% |
| 11/26 | 1,642 | 1,644 | 1,642 | 1,643 | +0.06% | 13,000 | 144億7282万 | -0.06% |
| 11/25 | (5%ルール)常磐開発(6.66%) |
| 11/25 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 4,000 | 144億6401万 | -0.12% |
| 11/22 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 6,600 | 144億6401万 | -0.12% |
| 11/21 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 5,400 | 144億6401万 | -0.12% |
| 11/20 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 4,200 | 144億6401万 | -0.18% |
| 11/19 | 1,642 | 1,644 | 1,642 | 1,642 | 0% | 11,900 | 144億6401万 | -0.18% |
| 11/18 | 1,642 | 1,643 | 1,642 | 1,642 | 0% | 8,300 | 144億6401万 | -0.18% |
| 11/15 | 1,642 | 1,643 | 1,642 | 1,642 | -0.06% | 11,700 | 144億6401万 | -0.18% |
| 11/14 | 1,642 | 1,643 | 1,642 | 1,643 | 0% | 12,800 | 144億7282万 | -0.12% |
| 11/13 | 1,642 | 1,644 | 1,642 | 1,643 | +0.06% | 14,900 | 144億7282万 | -0.18% |
| 11/12 | (IR情報)15:30 Ontario合同会社による常磐興産株式会社株式(証券コード:9675)に対する公開買付け(第二回)の開始に関するお知らせ |
| 11/12 | (IR情報)15:30 支配株主であるOntario合同会社による当社株式に対する公開買付けに関する意見表明(第二回)のお知らせ |
| 11/12 | (IR情報)15:30 特別利益(投資有価証券売却益)及び特別損失(公開買付関連費用)の計上見込み並びに業績予想の修正に関するお知らせ |
| 11/12 | (IR情報)15:30 2025年3月期第2四半期(中間期)決算短信〔日本基準〕(連結) |
| 11/12 | 1,641 | 1,644 | 1,641 | 1,642 | -0.12% | 16,000 | 144億6401万 | -0.24% |
| 11/11 | 1,641 | 1,644 | 1,640 | 1,644 | +0.24% | 27,100 | 144億8163万 | -0.12% |
| 11/08 | 1,641 | 1,642 | 1,639 | 1,640 | +0.06% | 57,400 | 144億4639万 | -0.36% |
| 11/07 | 1,640 | 1,642 | 1,639 | 1,639 | +0.06% | 47,500 | 144億3758万 | -0.43% |
| 11/06 | (5%ルール)Ontario(71.92%) |
| 11/06 | (IR情報)15:30 Ontario合同会社による当社株式に対する公開買付け(第一回)の結果並びに親会社及び主要株主である筆頭株主の異動に関するお知らせ |
| 11/06 | 1,639 | 1,641 | 1,637 | 1,638 | -0.06% | 17,500 | 144億2877万 | -0.49% |
| 11/05 | 1,643 | 1,643 | 1,639 | 1,639 | -0.18% | 40,100 | 144億3758万 | -0.49% |
| 11/01 | 1,648 | 1,648 | 1,642 | 1,642 | -0.42% | 16,100 | 144億6401万 | -0.3% |
| 10/31 | 1,649 | 1,650 | 1,648 | 1,649 | +0.06% | 124,300 | 145億2567万 | +0.12% |
| 10/30 | 1,649 | 1,650 | 1,648 | 1,648 | 0% | 123,200 | 145億1686万 | +0.06% |
| 10/29 | 1,649 | 1,649 | 1,648 | 1,648 | -0.06% | 46,600 | 145億1686万 | +0.06% |
| 10/28 | 1,648 | 1,650 | 1,648 | 1,649 | +0.06% | 147,200 | 145億2567万 | +0.12% |
| 10/25 | 1,648 | 1,649 | 1,648 | 1,648 | 0% | 17,200 | 145億1686万 | +0.06% |
| 10/24 | 1,648 | 1,649 | 1,648 | 1,648 | 0% | 20,700 | 145億1686万 | +0.06% |
| 10/23 | 1,648 | 1,649 | 1,648 | 1,648 | 0% | 27,400 | 145億1686万 | +0.06% |
| 10/22 | 1,649 | 1,649 | 1,648 | 1,648 | -0.06% | 88,000 | 145億1686万 | +0.06% |
| 10/21 | (IR情報)16:30 (変更)公開買付届出書の訂正届出書提出に伴う「Ontario合同会社による常磐興産株式会社株式に対する公開買付けの開始に関するお知らせ」の変更に関するお知らせ |
| 10/21 | (IR情報)16:30 (変更)「Ontario合同会社による当社株式に対する公開買付けに関する意見表明のお知らせ」の一部変更について |
| 10/21 | 1,649 | 1,650 | 1,648 | 1,649 | 0% | 167,900 | 145億2567万 | +0.06% |
| 10/18 | 1,649 | 1,649 | 1,648 | 1,649 | +0.06% | 109,300 | 145億2567万 | +0.06% |
| 10/17 | 1,648 | 1,649 | 1,648 | 1,648 | +0.06% | 126,400 | 145億1686万 | -0.06% |
| 10/16 | 1,648 | 1,648 | 1,647 | 1,647 | 0% | 116,000 | 145億805万 | +0.12% |
| 10/15 | 1,648 | 1,648 | 1,647 | 1,647 | -0.06% | 133,600 | 145億805万 | +1.17% |
| 10/11 | 1,646 | 1,648 | 1,646 | 1,648 | +0.12% | 334,400 | 145億1686万 | +2.23% |
| 10/10 | 1,646 | 1,647 | 1,646 | 1,646 | 0% | 90,700 | 144億9924万 | +3.26% |
| 10/09 | 1,647 | 1,647 | 1,646 | 1,646 | -0.06% | 83,700 | 144億9924万 | +4.31% |
| 10/08 | 1,647 | 1,647 | 1,646 | 1,647 | +0.06% | 136,300 | 145億805万 | +5.51% |
| 10/07 | 1,646 | 1,647 | 1,646 | 1,646 | 0% | 117,100 | 144億9924万 | +6.61% |
| 10/04 | 1,647 | 1,647 | 1,646 | 1,646 | 0% | 113,800 | 144億9924万 | +7.79% |
| 10/03 | 1,647 | 1,647 | 1,646 | 1,646 | 0% | 164,600 | 144億9924万 | +9.01% |
| 10/02 | 1,646 | 1,647 | 1,646 | 1,646 | 0% | 159,100 | 144億9924万 | +10.25% |
| 10/01 | 1,646 | 1,647 | 1,646 | 1,646 | 0% | 226,900 | 144億9924万 | +11.59% |
| 09/30 | 1,646 | 1,647 | 1,646 | 1,646 | 0% | 260,500 | 144億9924万 | +12.89% |
| 09/27 | 1,647 | 1,647 | 1,646 | 1,646 | -0.06% | 468,300 | 144億9924万 | +14.31% |
| 09/26 | 1,648 | 1,648 | 1,646 | 1,647 | -0.06% | 306,300 | 145億805万 | +15.82% |
| 09/25 | 1,647 | 1,648 | 1,647 | 1,648 | +0.06% | 208,500 | 145億1686万 | +17.38% |
| 09/24 | (5%ルール)みずほ銀行(2.14%)アセットマネジメントOne(0.15%)みずほ証券(0.48%)みずほ信託銀行(2.07%) |
| 09/24 | 1,649 | 1,650 | 1,647 | 1,647 | -0.06% | 109,700 | 145億805万 | +18.92% |
| 09/20 | 1,650 | 1,650 | 1,647 | 1,648 | -0.06% | 184,900 | 145億1686万 | +20.56% |
| 09/19 | 1,650 | 1,651 | 1,649 | 1,649 | -0.06% | 64,100 | 145億2567万 | +22.24% |