| 2024 |
| 10/28 | (IR情報)14:00 当社株式の上場廃止のお知らせ |
| 10/28 | 868 | 871 | 868 | 868 | -0.12% | 189,300 | 847億1465万 | 0% |
| 10/25 | 868 | 870 | 868 | 869 | +0.12% | 32,700 | 848億1225万 | +0.12% |
| 10/24 | 868 | 870 | 868 | 868 | 0% | 48,100 | 847億1465万 | 0% |
| 10/23 | 869 | 870 | 868 | 868 | 0% | 64,600 | 847億1465万 | 0% |
| 10/22 | 869 | 870 | 868 | 868 | -0.12% | 29,000 | 847億1465万 | 0% |
| 10/21 | 868 | 870 | 868 | 869 | +0.12% | 131,900 | 848億1225万 | +0.12% |
| 10/18 | (5%ルール)伊藤忠プラスチックス(0.2%)API(35.05%)伊藤忠商事(64.72%) |
| 10/18 | 868 | 869 | 868 | 868 | 0% | 19,300 | 847億1465万 | 0% |
| 10/17 | 868 | 870 | 868 | 868 | 0% | 86,300 | 847億1465万 | 0% |
| 10/16 | 868 | 870 | 868 | 868 | 0% | 105,600 | 847億1465万 | 0% |
| 10/15 | 868 | 870 | 868 | 868 | 0% | 99,500 | 847億1465万 | 0% |
| 10/11 | 869 | 870 | 868 | 868 | -0.12% | 68,700 | 847億1465万 | 0% |
| 10/10 | 869 | 870 | 868 | 869 | +0.23% | 66,400 | 848億1225万 | +0.12% |
| 10/09 | 868 | 869 | 867 | 867 | -0.23% | 58,800 | 846億1705万 | -0.12% |
| 10/08 | 868 | 869 | 868 | 869 | +0.23% | 53,400 | 848億1225万 | +0.12% |
| 10/07 | 867 | 869 | 867 | 867 | +0.12% | 315,200 | 846億1705万 | -0.12% |
| 10/04 | 866 | 869 | 866 | 866 | -0.12% | 724,100 | 845億1946万 | -0.23% |
| 10/03 | 867 | 869 | 866 | 867 | 0% | 447,100 | 846億1705万 | -0.12% |
| 10/02 | 867 | 869 | 866 | 867 | -0.12% | 385,800 | 846億1705万 | -0.12% |
| 10/01 | (IR情報)14:00 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 |
| 10/01 | (IR情報)14:00 伊藤忠商事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 |
| 10/01 | 867 | 869 | 866 | 868 | +0.23% | 200,500 | 847億1465万 | -0.12% |
| 09/30 | 867 | 868 | 865 | 866 | -0.23% | 203,900 | 845億1946万 | -0.35% |
| 09/27 | 868 | 869 | 867 | 868 | -0.12% | 81,100 | 847億1465万 | -0.12% |
| 09/26 | (5%ルール)伊藤忠プラスチックス(0.2%)API(35.05%)伊藤忠商事(55.48%) |
| 09/26 | 868 | 869 | 867 | 869 | +0.23% | 238,900 | 848億1225万 | 0% |
| 09/25 | 870 | 870 | 867 | 867 | 0% | 356,800 | 846億1705万 | -0.23% |
| 09/24 | 868 | 868 | 867 | 867 | -0.34% | 160,600 | 846億1705万 | -0.23% |
| 09/20 | 869 | 870 | 868 | 870 | 0% | 155,800 | 849億985万 | +0.12% |
| 09/19 | (IR情報)16:00 親会社である伊藤忠商事株式会社の子会社である合同会社APIによる当社株式に対する公開買付けの結果並びにその他の関係会社及び主要株主の異動に関するお知らせ |
| 09/19 | 868 | 870 | 868 | 870 | +0.23% | 128,900 | 849億985万 | +0.12% |
| 09/18 | 869 | 873 | 868 | 868 | 0% | 234,300 | 847億1465万 | -0.12% |
| 09/17 | 868 | 870 | 867 | 868 | -0.12% | 649,400 | 847億1465万 | -0.12% |
| 09/13 | 869 | 870 | 869 | 869 | 0% | 293,300 | 848億1225万 | 0% |
| 09/12 | 869 | 870 | 868 | 869 | +0.12% | 465,500 | 848億1225万 | 0% |
| 09/11 | 869 | 870 | 868 | 868 | -0.12% | 299,600 | 847億1465万 | -0.12% |
| 09/10 | 869 | 870 | 869 | 869 | 0% | 102,700 | 848億1225万 | 0% |
| 09/09 | 869 | 870 | 868 | 869 | 0% | 356,200 | 848億1225万 | -0.11% |
| 09/06 | 869 | 869 | 868 | 869 | +0.12% | 133,800 | 848億1225万 | +0.23% |
| 09/05 | 869 | 870 | 868 | 868 | 0% | 235,500 | 847億1465万 | +0.35% |
| 09/04 | 869 | 870 | 868 | 868 | -0.12% | 536,600 | 847億1465万 | +0.46% |
| 09/03 | 869 | 870 | 868 | 869 | +0.12% | 370,900 | 848億1225万 | +0.81% |
| 09/02 | 869 | 870 | 868 | 868 | -0.12% | 342,400 | 847億1465万 | +0.81% |
| 08/30 | 870 | 870 | 869 | 869 | -0.11% | 344,000 | 848億1225万 | +0.93% |
| 08/29 | 870 | 870 | 869 | 870 | 0% | 252,800 | 849億985万 | +1.16% |
| 08/28 | 869 | 870 | 868 | 870 | +0.12% | 490,100 | 849億985万 | +1.16% |
| 08/27 | 869 | 870 | 868 | 869 | +0.12% | 561,900 | 848億1225万 | +1.05% |
| 08/26 | (IR情報)14:00 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 |
| 08/26 | 870 | 870 | 868 | 868 | -0.12% | 493,900 | 847億1465万 | +0.93% |
| 08/23 | 869 | 870 | 869 | 869 | 0% | 144,200 | 848億1225万 | +1.16% |
| 08/22 | 869 | 870 | 869 | 869 | 0% | 419,300 | 848億1225万 | +1.16% |
| 08/21 | 869 | 870 | 869 | 869 | 0% | 427,500 | 848億1225万 | +1.52% |
| 08/20 | 869 | 870 | 868 | 869 | +0.12% | 554,500 | 848億1225万 | +1.76% |
| 08/19 | 869 | 870 | 868 | 868 | -0.12% | 655,100 | 847億1465万 | +2.12% |
| 08/16 | 869 | 870 | 869 | 869 | 0% | 456,400 | 848億1225万 | +2.72% |
| 08/15 | 869 | 870 | 869 | 869 | 0% | 308,200 | 848億1225万 | +3.33% |
| 08/14 | 869 | 870 | 869 | 869 | 0% | 213,100 | 848億1225万 | +3.95% |
| 08/13 | 868 | 870 | 868 | 869 | +0.12% | 816,000 | 848億1225万 | +4.7% |
| 08/09 | 869 | 869 | 868 | 868 | 0% | 526,400 | 847億1465万 | +5.21% |
| 08/08 | 869 | 869 | 868 | 868 | 0% | 1,471,600 | 847億1465万 | +5.85% |
| 08/07 | 868 | 869 | 868 | 868 | 0% | 1,387,800 | 847億1465万 | +6.5% |
| 08/06 | 868 | 872 | 867 | 868 | -3.02% | 3,134,600 | 847億1465万 | +7.16% |
| 08/05 | (IR情報)15:15 譲渡制限付株式報酬としての新株式の発行中止に関するお知らせ |
| 08/05 | (IR情報)15:15 2025年3月期配当予想の修正(無配)に関するお知らせ |
| 08/05 | (IR情報)15:15 親会社である伊藤忠商事株式会社の子会社である合同会社API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 |
| 08/05 | (IR情報)15:15 2025年3月期第1四半期決算短信〔日本基準〕(連結) |
| 08/05 | 765 | 909 | 728 | 895 | +12.86% | 1,909,900 | 873億4978万 | +11.32% |
| 08/02 | 806 | 817 | 793 | 793 | -3.41% | 223,100 | 773億9484万 | -0.63% |
| 08/01 | 844 | 850 | 810 | 821 | -4.2% | 247,400 | 801億2757万 | +3.14% |
| 07/31 | 802 | 863 | 788 | 857 | +5.54% | 429,000 | 836億4108万 | +7.93% |
| 07/30 | 847 | 853 | 812 | 812 | -4.81% | 290,200 | 792億4919万 | +2.92% |
| 07/29 | 852 | 876 | 849 | 853 | -0.12% | 179,200 | 832億5069万 | +8.52% |
| 07/26 | 843 | 862 | 841 | 854 | +0.47% | 400,700 | 833億4829万 | +9.35% |
| 07/25 | 856 | 857 | 839 | 850 | -1.73% | 275,100 | 829億5790万 | +9.54% |
| 07/24 | (IR情報)14:00 譲渡制限付株式報酬としての新株式の発行に関するお知らせ |
| 07/24 | 875 | 878 | 861 | 865 | -1.14% | 169,500 | 844億2186万 | +12.34% |
| 07/23 | 858 | 898 | 858 | 875 | +1.86% | 307,700 | 853億9783万 | +14.68% |
| 07/22 | 850 | 862 | 847 | 859 | +1.06% | 137,000 | 838億3627万 | +13.77% |
| 07/19 | 853 | 854 | 842 | 850 | -1.73% | 268,100 | 829億5790万 | +13.48% |
| 07/18 | 800 | 872 | 798 | 865 | +7.32% | 470,800 | 844億2186万 | +16.73% |
| 07/17 | 810 | 811 | 805 | 806 | +0.62% | 144,000 | 786億6360万 | +9.66% |
| 07/16 | 780 | 808 | 777 | 801 | +3.49% | 276,000 | 781億7562万 | +9.73% |
| 07/12 | 762 | 779 | 762 | 774 | +1.18% | 109,100 | 755億4048万 | +6.61% |
| 07/11 | 760 | 772 | 759 | 765 | +1.59% | 185,200 | 746億6211万 | +5.66% |
| 07/10 | 739 | 756 | 739 | 753 | +1.48% | 185,100 | 734億9094万 | +4.44% |
| 07/09 | 728 | 749 | 728 | 742 | +1.92% | 100,100 | 724億1736万 | +3.2% |
| 07/08 | 737 | 739 | 719 | 728 | -1.36% | 103,300 | 710億5100万 | +1.39% |
| 07/05 | 740 | 746 | 735 | 738 | -0.14% | 78,400 | 720億2697万 | +2.93% |
| 07/04 | 737 | 744 | 734 | 739 | +0.27% | 52,000 | 721億2457万 | +3.07% |
| 07/03 | 740 | 746 | 737 | 737 | -0.14% | 75,300 | 719億2937万 | +2.93% |
| 07/02 | 735 | 743 | 731 | 738 | +0.41% | 95,100 | 720億2697万 | +3.22% |
| 07/01 | 739 | 739 | 725 | 735 | 0% | 103,900 | 717億3418万 | +2.8% |
| 06/28 | 748 | 754 | 727 | 735 | -2.26% | 99,300 | 717億3418万 | +2.8% |
| 06/27 | 757 | 763 | 746 | 752 | -0.79% | 137,900 | 733億9334万 | +5.17% |
| 06/26 | 747 | 759 | 747 | 758 | +1.88% | 149,600 | 739億7892万 | +6.01% |
| 06/25 | 749 | 754 | 741 | 744 | 0% | 159,800 | 726億1256万 | +4.06% |
| 06/24 | 737 | 744 | 736 | 744 | +2.34% | 130,500 | 726億1256万 | +4.06% |
| 06/21 | 726 | 736 | 724 | 727 | +0.97% | 259,200 | 709億5340万 | +1.54% |
| 06/20 | (IR情報)14:00 プライム上場維持基準への適合に関するお知らせ |
| 06/20 | 708 | 721 | 708 | 720 | +1.98% | 332,000 | 702億7022万 | +0.56% |
| 06/19 | 692 | 706 | 691 | 706 | +2.47% | 98,100 | 689億385万 | -1.26% |
| 06/18 | 687 | 695 | 684 | 689 | +1.47% | 73,700 | 672億4469万 | -3.77% |
| 06/17 | 686 | 687 | 670 | 679 | -1.45% | 57,600 | 662億6872万 | -5.3% |
| 06/14 | 671 | 691 | 670 | 689 | +2.68% | 101,500 | 672億4469万 | -4.17% |
| 06/13 | 695 | 695 | 671 | 671 | -3.31% | 85,500 | 654億8794万 | -6.93% |
| 06/12 | 700 | 700 | 694 | 694 | -1.14% | 54,500 | 677億3268万 | -4.14% |
| 06/11 | 699 | 710 | 699 | 702 | +0.29% | 72,000 | 685億1346万 | -3.04% |
| 06/10 | 700 | 708 | 699 | 700 | -0.57% | 62,600 | 683億1827万 | -3.05% |
| 06/07 | 698 | 705 | 698 | 704 | +0.57% | 37,000 | 687億866万 | -2.36% |
| 06/06 | 702 | 707 | 698 | 700 | +0.29% | 53,500 | 683億1827万 | -2.51% |
| 06/05 | 707 | 713 | 698 | 698 | -1.83% | 59,400 | 681億2307万 | -2.51% |
| 06/04 | 719 | 719 | 710 | 711 | -1.8% | 72,700 | 693億9184万 | -0.42% |