| 2020 |
| 09/24 | （IR情報）15:00 当社株式の上場廃止のお知らせ |
| 09/24 | 1,076 | 1,078 | 1,076 | 1,078 | +0.19% | 19,300 | 15億9635万 | +0.28% |
| 09/23 | 1,076 | 1,076 | 1,076 | 1,076 | 0% | 3,200 | 15億9339万 | +0.09% |
| 09/18 | 1,075 | 1,076 | 1,075 | 1,076 | +0.09% | 1,500 | 15億9339万 | +0.09% |
| 09/17 | 1,075 | 1,075 | 1,075 | 1,075 | +0.09% | 2,300 | 15億9191万 | 0% |
| 09/16 | 1,075 | 1,075 | 1,074 | 1,074 | 0% | 3,900 | 15億9043万 | -0.19% |
| 09/15 | 1,075 | 1,075 | 1,074 | 1,074 | -0.09% | 2,700 | 15億9043万 | -0.19% |
| 09/14 | 1,075 | 1,075 | 1,074 | 1,075 | +0.09% | 2,800 | 15億9191万 | -0.09% |
| 09/11 | 1,075 | 1,075 | 1,074 | 1,074 | -0.09% | 7,500 | 15億9043万 | -0.19% |
| 09/10 | 1,075 | 1,075 | 1,075 | 1,075 | 0% | 2,300 | 15億9191万 | -0.09% |
| 09/09 | 1,076 | 1,076 | 1,075 | 1,075 | -0.09% | 1,700 | 15億9191万 | -0.09% |
| 09/08 | （IR情報）15:00 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に係る承認決議に関するお知らせ |
| 09/08 | 1,076 | 1,076 | 1,076 | 1,076 | 0% | 200 | 15億9339万 | 0% |
| 09/07 | 1,076 | 1,076 | 1,076 | 1,076 | 0% | 300 | 15億9339万 | 0% |
| 09/04 | 1,076 | 1,076 | 1,076 | 1,076 | +0.09% | 100 | 15億9339万 | 0% |
| 09/01 | 1,075 | 1,075 | 1,075 | 1,075 | 0% | 100 | 15億9191万 | -0.09% |
| 08/31 | 1,075 | 1,076 | 1,075 | 1,075 | 0% | 1,200 | 15億9191万 | -0.09% |
| 08/27 | 1,076 | 1,076 | 1,075 | 1,075 | -0.09% | 1,300 | 17億2645万 | -0.09% |
| 08/26 | 1,076 | 1,076 | 1,075 | 1,076 | 0% | 500 | 17億2805万 | 0% |
| 08/25 | 1,075 | 1,076 | 1,075 | 1,076 | +0.09% | 700 | 17億2805万 | 0% |
| 08/24 | 1,075 | 1,075 | 1,075 | 1,075 | 0% | 1,100 | 17億2645万 | -0.09% |
| 08/21 | 1,076 | 1,076 | 1,075 | 1,075 | -0.09% | 400 | 17億2645万 | -0.09% |
| 08/20 | 1,076 | 1,076 | 1,076 | 1,076 | +0.09% | 1,100 | 17億2805万 | 0% |
| 08/19 | 1,076 | 1,077 | 1,075 | 1,075 | -0.09% | 6,500 | 17億2645万 | -0.09% |
| 08/18 | 1,076 | 1,078 | 1,076 | 1,076 | 0% | 2,200 | 17億2805万 | 0% |
| 08/14 | 1,077 | 1,077 | 1,076 | 1,076 | 0% | 10,300 | 17億2805万 | 0% |
| 08/13 | 1,077 | 1,077 | 1,076 | 1,076 | -0.09% | 1,400 | 17億2805万 | 0% |
| 08/12 | 1,076 | 1,077 | 1,076 | 1,077 | 0% | 600 | 17億2966万 | +0.09% |
| 08/11 | 1,077 | 1,077 | 1,077 | 1,077 | +0.09% | 1,000 | 17億2966万 | 0% |
| 08/07 | （IR情報）16:00 2021年3月期第1四半期決算短信〔日本基準〕(連結) |
| 08/07 | （IR情報）15:00 執行役員人事に関するお知らせ |
| 08/07 | （IR情報）15:00 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に関するお知らせ |
| 08/04 | 1,076 | 1,076 | 1,076 | 1,076 | -0.19% | 200 | 17億2805万 | -0.09% |
| 08/03 | 1,076 | 1,078 | 1,076 | 1,078 | +0.19% | 400 | 17億3126万 | +0.09% |
| 07/31 | 1,076 | 1,076 | 1,076 | 1,076 | 0% | 800 | 17億2805万 | -0.09% |
| 07/30 | 1,076 | 1,076 | 1,076 | 1,076 | 0% | 600 | 17億2805万 | -0.09% |
| 07/29 | 1,076 | 1,076 | 1,076 | 1,076 | 0% | 100 | 17億2805万 | -0.09% |
| 07/28 | 1,076 | 1,076 | 1,076 | 1,076 | 0% | 300 | 17億2805万 | -0.09% |
| 07/27 | 1,076 | 1,076 | 1,076 | 1,076 | 0% | 600 | 17億2805万 | -0.09% |
| 07/22 | 1,076 | 1,077 | 1,076 | 1,076 | +0.09% | 700 | 17億2805万 | -0.09% |
| 07/20 | （5%ルール）井上庄二郎（0%） |
| 07/20 | 1,076 | 1,076 | 1,075 | 1,075 | -0.09% | 1,100 | 17億2645万 | -0.19% |
| 07/17 | （5%ルール）三井物産（0%） |
| 07/17 | 1,078 | 1,078 | 1,075 | 1,076 | +0.09% | 300 | 17億2805万 | -0.09% |
| 07/16 | 1,075 | 1,078 | 1,075 | 1,075 | 0% | 4,300 | 17億2645万 | -0.19% |
| 07/15 | 1,075 | 1,078 | 1,074 | 1,075 | 0% | 33,100 | 17億2645万 | -0.19% |
| 07/14 | （5%ルール）昭和産業（80.91%） |
| 07/14 | （IR情報）15:00 昭和産業株式会社による当社株式に対する公開買付け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 |
| 07/14 | 1,077 | 1,077 | 1,075 | 1,075 | 0% | 200 | 17億2645万 | -0.19% |
| 07/13 | 1,075 | 1,075 | 1,075 | 1,075 | 0% | 2,500 | 17億2645万 | -0.28% |
| 07/10 | 1,075 | 1,075 | 1,075 | 1,075 | -0.09% | 2,400 | 17億2645万 | -0.28% |
| 07/09 | 1,063 | 1,078 | 1,063 | 1,076 | -0.19% | 3,400 | 17億2805万 | -0.19% |
| 07/08 | 1,078 | 1,078 | 1,078 | 1,078 | 0% | 900 | 17億3126万 | 0% |
| 07/07 | 1,078 | 1,078 | 1,078 | 1,078 | -0.09% | 3,100 | 17億3126万 | 0% |
| 07/06 | （IR情報）15:00 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 |
| 07/06 | 1,078 | 1,079 | 1,078 | 1,079 | +0.19% | 7,100 | 17億3287万 | +0.09% |
| 07/03 | 1,078 | 1,078 | 1,077 | 1,077 | -0.09% | 15,300 | 17億2966万 | -0.09% |
| 07/02 | 1,078 | 1,080 | 1,078 | 1,078 | 0% | 10,500 | 17億3126万 | 0% |
| 07/01 | 1,079 | 1,079 | 1,077 | 1,078 | 0% | 14,700 | 17億3126万 | 0% |
| 06/30 | 1,077 | 1,079 | 1,077 | 1,078 | 0% | 7,500 | 17億3126万 | 0% |
| 06/29 | 1,078 | 1,078 | 1,078 | 1,078 | 0% | 2,800 | 17億3126万 | 0% |
| 06/26 | 1,078 | 1,080 | 1,078 | 1,078 | +0.09% | 16,400 | 17億3126万 | 0% |
| 06/25 | 1,077 | 1,078 | 1,077 | 1,077 | -0.09% | 22,700 | 17億2966万 | -0.09% |
| 06/24 | 1,077 | 1,078 | 1,077 | 1,078 | +0.09% | 2,800 | 17億3126万 | 0% |
| 06/23 | 1,077 | 1,077 | 1,077 | 1,077 | 0% | 5,000 | 17億2966万 | -0.09% |
| 06/22 | 1,078 | 1,078 | 1,077 | 1,077 | -0.19% | 800 | 17億2966万 | -0.09% |
| 06/19 | 1,078 | 1,079 | 1,077 | 1,079 | +0.19% | 5,900 | 17億3287万 | +0.28% |
| 06/18 | 1,079 | 1,079 | 1,077 | 1,077 | -0.19% | 12,400 | 17億2966万 | +0.75% |
| 06/17 | 1,078 | 1,079 | 1,078 | 1,079 | +0.09% | 14,800 | 17億3287万 | +2.27% |
| 06/16 | 1,077 | 1,078 | 1,077 | 1,078 | 0% | 17,500 | 17億3126万 | +3.45% |
| 06/15 | 1,077 | 1,078 | 1,077 | 1,078 | +0.09% | 600 | 17億3126万 | +4.76% |
| 06/12 | 1,078 | 1,078 | 1,077 | 1,077 | -0.09% | 14,700 | 17億2966万 | +6.11% |
| 06/11 | 1,078 | 1,078 | 1,078 | 1,078 | 0% | 2,400 | 17億3126万 | +7.58% |
| 06/10 | 1,078 | 1,078 | 1,078 | 1,078 | 0% | 8,900 | 17億3126万 | +9% |
| 06/09 | 1,078 | 1,078 | 1,078 | 1,078 | 0% | 12,000 | 17億3126万 | +10.34% |
| 06/08 | 1,078 | 1,078 | 1,078 | 1,078 | 0% | 7,600 | 17億3126万 | +11.59% |
| 06/05 | 1,078 | 1,078 | 1,078 | 1,078 | 0% | 2,600 | 17億3126万 | +12.88% |
| 06/04 | 1,078 | 1,079 | 1,078 | 1,078 | 0% | 9,200 | 17億3126万 | +14.32% |
| 06/03 | 1,078 | 1,079 | 1,078 | 1,078 | 0% | 6,700 | 17億3126万 | +15.79% |
| 06/02 | 1,078 | 1,078 | 1,078 | 1,078 | +0.09% | 15,100 | 17億3126万 | +17.3% |
| 06/01 | 1,077 | 1,079 | 1,077 | 1,077 | 0% | 21,200 | 17億2966万 | +18.74% |
| 05/29 | 1,077 | 1,078 | 1,077 | 1,077 | 0% | 23,300 | 17億2966万 | +20.47% |
| 05/28 | 1,078 | 1,079 | 1,077 | 1,077 | -0.09% | 19,000 | 17億2966万 | +22.39% |
| 05/27 | 1,078 | 1,079 | 1,077 | 1,078 | 0% | 12,700 | 17億3126万 | +24.48% |
| 05/26 | （5%ルール）三井物産（6.56%） |
| 05/26 | 1,078 | 1,080 | 1,078 | 1,078 | +0.09% | 24,900 | 17億3126万 | +26.53% |
| 05/25 | 1,078 | 1,078 | 1,077 | 1,077 | -0.19% | 45,000 | 17億2966万 | +28.67% |
| 05/22 | 1,078 | 1,081 | 1,078 | 1,079 | +0.09% | 17,500 | 17億3287万 | +31.43% |
| 05/21 | 1,078 | 1,079 | 1,077 | 1,078 | 0% | 15,300 | 17億3126万 | +33.58% |
| 05/20 | 1,082 | 1,083 | 1,078 | 1,078 | -0.28% | 75,200 | 17億3126万 | +35.77% |
| 05/19 | 1,096 | 1,109 | 1,081 | 1,081 | +3.94% | 121,300 | 17億3608万 | +39.12% |
| 05/18 | 1,040 | 1,040 | 1,040 | 1,040 | +16.85% | 3,000 | 16億7024万 | +36.84% |
| 05/15 | （IR情報）16:00 2020年3月期決算短信〔日本基準〕(連結) |
| 05/15 | （IR情報）16:00 会計監査人の異動に関するお知らせ |
| 05/15 | 890 | 890 | 890 | 890 | +20.27% | 2,900 | 14億2934万 | +19.46% |
| 05/14 | （IR情報）15:00 昭和産業株式会社による当社株式に対する公開買付けに関する賛同表明及び応募推奨のお知らせ |
| 05/14 | 740 | 752 | 736 | 740 | 0% | 800 | 11億8844万 | +0.54% |
| 05/13 | 750 | 756 | 740 | 740 | -0.54% | 700 | 11億8844万 | +0.95% |
| 05/12 | 743 | 744 | 743 | 744 | +0.13% | 300 | 11億9486万 | +2.06% |
| 05/11 | 743 | 743 | 743 | 743 | -0.67% | 200 | 11億9325万 | +2.2% |
| 05/08 | 745 | 756 | 745 | 748 | -0.93% | 600 | 12億128万 | +3.03% |
| 05/07 | 740 | 755 | 740 | 755 | -3.82% | 400 | 12億1253万 | +3.99% |
| 05/01 | （IR情報）16:00 通期業績予想の修正に関するお知らせ |
| 04/30 | 785 | 785 | 785 | 785 | -1.88% | 100 | 12億6071万 | +8.43% |
| 04/27 | 800 | 800 | 800 | 800 | +0.13% | 700 | 12億8480万 | +11.27% |
| 04/24 | 799 | 799 | 799 | 799 | +3.23% | 100 | 12億8319万 | +12.06% |
| 04/23 | 774 | 774 | 774 | 774 | -1.28% | 200 | 12億4304万 | +9.63% |
| 04/22 | 799 | 799 | 784 | 784 | +2.35% | 300 | 12億5910万 | +11.84% |
| 04/21 | 740 | 766 | 740 | 766 | -2.3% | 600 | 12億3019万 | +10.06% |
| 04/20 | 799 | 799 | 784 | 784 | +4.53% | 700 | 12億5910万 | +12.48% |
| 04/17 | 733 | 750 | 733 | 750 | +2.32% | 300 | 12億450万 | +7.76% |
| 04/16 | 741 | 741 | 733 | 733 | +0.41% | 300 | 11億7719万 | +5.32% |
| 04/14 | 730 | 730 | 730 | 730 | 0% | 100 | 11億7238万 | +4.43% |
| 04/13 | 730 | 730 | 730 | 730 | +4.89% | 200 | 11億7238万 | +3.84% |
| 04/10 | 733 | 733 | 692 | 696 | +1.9% | 400 | 11億1777万 | -1.83% |
