| 2019 |
| 11/07 | 990 | 991 | 990 | 991 | 0% | 5,700 | 410億7695万 | 0% |
| 11/06 | （IR情報）16:00 剰余金の配当(中間配当)に関するお知らせ |
| 11/06 | 990 | 991 | 990 | 991 | 0% | 3,300 | 410億7695万 | 0% |
| 11/05 | 991 | 991 | 990 | 991 | 0% | 4,200 | 410億7695万 | 0% |
| 11/01 | 991 | 991 | 991 | 991 | 0% | 4,900 | 410億7695万 | -0.1% |
| 10/31 | 990 | 991 | 990 | 991 | -0.1% | 11,800 | 410億7695万 | -0.1% |
| 10/30 | 991 | 992 | 991 | 992 | +0.1% | 1,500 | 411億1840万 | 0% |
| 10/29 | （5%ルール）日本化薬（0%） |
| 10/29 | 992 | 992 | 991 | 991 | -0.1% | 11,000 | 410億7695万 | -0.2% |
| 10/28 | 991 | 992 | 991 | 992 | 0% | 5,200 | 411億1840万 | -0.1% |
| 10/25 | 991 | 992 | 991 | 992 | +0.1% | 40,000 | 411億1840万 | -0.1% |
| 10/24 | 991 | 991 | 991 | 991 | 0% | 20,700 | 410億7695万 | -0.2% |
| 10/23 | 991 | 992 | 991 | 991 | 0% | 6,900 | 410億7695万 | -0.2% |
| 10/21 | （IR情報）15:00 日本化薬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 |
| 10/21 | 991 | 992 | 991 | 991 | 0% | 3,500 | 410億7695万 | -0.3% |
| 10/18 | （5%ルール）日本化薬（99.2%） |
| 10/18 | （5%ルール）有沢製作所（0%） |
| 10/18 | 991 | 991 | 991 | 991 | 0% | 200 | 410億7695万 | -0.3% |
| 10/17 | （5%ルール）日本化薬（66.45%） |
| 10/17 | 991 | 992 | 991 | 991 | 0% | 2,800 | 410億7695万 | -0.3% |
| 10/16 | 992 | 992 | 991 | 991 | 0% | 2,400 | 410億7695万 | -0.3% |
| 10/15 | 992 | 992 | 991 | 991 | 0% | 300 | 410億7695万 | -0.4% |
| 10/11 | （IR情報）10:30 支配株主である日本化薬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 |
| 10/11 | 991 | 993 | 991 | 991 | 0% | 21,500 | 410億7695万 | -0.4% |
| 10/10 | 991 | 991 | 991 | 991 | 0% | 5,600 | 410億7695万 | -0.4% |
| 10/09 | 991 | 991 | 991 | 991 | -0.1% | 3,900 | 410億7695万 | -0.4% |
| 10/08 | 992 | 992 | 992 | 992 | 0% | 19,100 | 411億1840万 | -0.4% |
| 10/07 | 992 | 992 | 992 | 992 | 0% | 16,100 | 411億1840万 | +0.1% |
| 10/04 | 992 | 992 | 992 | 992 | 0% | 55,500 | 411億1840万 | +1.22% |
| 10/03 | 992 | 993 | 992 | 992 | 0% | 18,800 | 411億1840万 | +2.8% |
| 10/02 | 992 | 993 | 992 | 992 | 0% | 14,500 | 411億1840万 | +4.86% |
| 10/01 | 992 | 992 | 992 | 992 | 0% | 12,700 | 411億1840万 | +7.13% |
| 09/30 | 992 | 992 | 992 | 992 | 0% | 10,900 | 411億1840万 | +9.37% |
| 09/27 | 993 | 993 | 992 | 992 | -0.7% | 17,100 | 411億1840万 | +11.71% |
| 09/26 | 998 | 999 | 998 | 999 | +0.1% | 22,700 | 414億855万 | +14.96% |
| 09/25 | 998 | 998 | 998 | 998 | 0% | 12,700 | 413億6710万 | +17.41% |
| 09/24 | 997 | 998 | 997 | 998 | +0.1% | 26,000 | 413億6710万 | +20.24% |
| 09/20 | 998 | 998 | 997 | 997 | 0% | 67,700 | 413億2565万 | +22.93% |
| 09/19 | 998 | 998 | 997 | 997 | 0% | 74,400 | 413億2565万 | +25.88% |
| 09/18 | 998 | 998 | 997 | 997 | 0% | 42,000 | 413億2565万 | +29.15% |
| 09/17 | 997 | 998 | 997 | 997 | 0% | 104,600 | 413億2565万 | +32.4% |
| 09/13 | 997 | 997 | 997 | 997 | 0% | 20,600 | 413億2565万 | +35.83% |
| 09/12 | 997 | 997 | 997 | 997 | 0% | 104,400 | 413億2565万 | +39.64% |
| 09/11 | 997 | 998 | 997 | 997 | 0% | 48,200 | 413億2565万 | +43.45% |
| 09/10 | 997 | 998 | 997 | 997 | 0% | 33,200 | 413億2565万 | +47.49% |
| 09/09 | 997 | 998 | 997 | 997 | 0% | 60,600 | 413億2565万 | +52.21% |
| 09/06 | 998 | 998 | 997 | 997 | 0% | 127,400 | 413億2565万 | +57.01% |
| 09/05 | 997 | 998 | 997 | 997 | 0% | 103,600 | 413億2565万 | +61.85% |
| 09/04 | （5%ルール）有沢製作所（22.39%） |
| 09/04 | 997 | 998 | 997 | 997 | 0% | 191,300 | 413億2565万 | +67% |
| 09/03 | 997 | 998 | 997 | 997 | -0.1% | 134,000 | 413億2565万 | +72.19% |
| 09/02 | 994 | 998 | 994 | 998 | +15.11% | 1,320,900 | 413億6710万 | +77.58% |
| 08/30 | 867 | 867 | 867 | 867 | +20.92% | 6,300 | 359億3715万 | +59.38% |
| 08/29 | 717 | 717 | 717 | 717 | +16.21% | 2,600 | 297億1965万 | +34.77% |
| 08/28 | 617 | 617 | 617 | 617 | +19.34% | 3,400 | 255億7465万 | +17.52% |
| 08/27 | （IR情報）15:30 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 |
| 08/27 | （IR情報）15:30 支配株主である日本化薬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及び応募推奨に関する意見表明のお知らせ |
| 08/27 | 512 | 517 | 509 | 517 | +1.17% | 1,700 | 214億2965万 | -1.15% |
| 08/26 | 507 | 511 | 502 | 511 | -0.58% | 2,100 | 211億8095万 | -2.67% |
| 08/23 | 516 | 516 | 512 | 514 | -0.39% | 1,800 | 213億530万 | -2.28% |
| 08/22 | 514 | 516 | 511 | 516 | +0.39% | 1,100 | 213億8820万 | -2.09% |
| 08/21 | 514 | 514 | 510 | 514 | 0% | 2,900 | 213億530万 | -2.84% |
| 08/20 | 514 | 514 | 509 | 514 | +0.19% | 1,100 | 213億530万 | -3.02% |
| 08/19 | 510 | 513 | 510 | 513 | 0% | 400 | 212億6385万 | -3.39% |
| 08/16 | 513 | 513 | 508 | 513 | -0.39% | 1,300 | 212億6385万 | -3.75% |
| 08/15 | 503 | 515 | 503 | 515 | 0% | 2,900 | 213億4675万 | -3.56% |
| 08/14 | 519 | 522 | 512 | 515 | +0.59% | 2,200 | 213億4675万 | -3.56% |
| 08/13 | 514 | 514 | 509 | 512 | -0.58% | 2,300 | 212億2240万 | -4.3% |
| 08/09 | 521 | 525 | 514 | 515 | 0% | 8,700 | 213億4675万 | -3.92% |
| 08/08 | 510 | 515 | 510 | 515 | +0.59% | 2,500 | 213億4675万 | -4.1% |
| 08/07 | 508 | 516 | 508 | 512 | +0.2% | 3,300 | 212億2240万 | -4.83% |
| 08/06 | 491 | 511 | 480 | 511 | +3.86% | 18,800 | 211億8095万 | -5.19% |
| 08/05 | 501 | 501 | 490 | 492 | -1.8% | 10,200 | 203億9340万 | -8.89% |
| 08/02 | 511 | 513 | 500 | 501 | -2.34% | 19,500 | 207億6645万 | -7.39% |
| 08/01 | 516 | 524 | 513 | 513 | -0.58% | 9,500 | 212億6385万 | -5.35% |
| 07/31 | 510 | 521 | 505 | 516 | -7.53% | 64,300 | 213億8820万 | -4.8% |
| 07/30 | （IR情報）15:30 2020年3月期第1四半期決算短信〔日本基準〕(連結) |
| 07/30 | （IR情報）15:30 業績予想の修正に関するお知らせ |
| 07/30 | 557 | 566 | 550 | 558 | -0.36% | 25,400 | 231億2910万 | +2.95% |
| 07/29 | 558 | 560 | 554 | 560 | +0.9% | 9,400 | 232億1200万 | +3.51% |
| 07/26 | 556 | 556 | 550 | 555 | -0.18% | 7,100 | 230億475万 | +2.97% |
| 07/25 | 559 | 559 | 554 | 556 | -0.54% | 2,200 | 230億4620万 | +3.54% |
| 07/24 | 560 | 560 | 554 | 559 | -0.18% | 4,100 | 231億7055万 | +4.29% |
| 07/23 | 555 | 561 | 550 | 560 | +0.9% | 12,000 | 232億1200万 | +4.87% |
| 07/22 | 551 | 557 | 550 | 555 | 0% | 12,000 | 230億475万 | +4.32% |
| 07/19 | 540 | 555 | 540 | 555 | +2.97% | 17,500 | 230億475万 | +4.52% |
| 07/18 | 549 | 549 | 539 | 539 | -2% | 9,600 | 223億4155万 | +1.89% |
| 07/17 | 552 | 552 | 547 | 550 | +0.55% | 5,400 | 227億9750万 | +4.17% |
| 07/16 | 549 | 549 | 540 | 547 | -0.55% | 8,500 | 226億7315万 | +3.6% |
| 07/12 | 550 | 550 | 539 | 550 | +1.29% | 30,100 | 227億9750万 | +4.36% |
| 07/11 | 536 | 543 | 536 | 543 | +1.31% | 4,700 | 225億735万 | +3.43% |
| 07/10 | 540 | 540 | 536 | 536 | 0% | 2,900 | 222億1720万 | +2.1% |
| 07/09 | 536 | 540 | 530 | 536 | -0.19% | 12,600 | 222億1720万 | +2.29% |
| 07/08 | 540 | 540 | 535 | 537 | -0.56% | 6,300 | 222億5865万 | +2.87% |
| 07/05 | 540 | 541 | 537 | 540 | 0% | 4,100 | 223億8300万 | +3.65% |
| 07/04 | 539 | 540 | 536 | 540 | +0.75% | 10,400 | 223億8300万 | +3.85% |
| 07/03 | 532 | 536 | 532 | 536 | +0.75% | 4,700 | 222億1720万 | +3.47% |
| 07/02 | 531 | 533 | 527 | 532 | +0.95% | 7,200 | 220億5140万 | +2.9% |
| 07/01 | 528 | 529 | 523 | 527 | +1.15% | 5,100 | 218億4415万 | +2.13% |
| 06/28 | （IR情報）15:30 支配株主等に関する事項について |
| 06/28 | 522 | 525 | 520 | 521 | -0.38% | 16,300 | 215億9545万 | +1.17% |
| 06/27 | 521 | 525 | 517 | 523 | +0.38% | 15,900 | 216億7835万 | +1.75% |
| 06/26 | 521 | 524 | 518 | 521 | -0.19% | 12,300 | 215億9545万 | +1.36% |
| 06/25 | 518 | 522 | 516 | 522 | +1.16% | 9,500 | 216億3690万 | +1.56% |
| 06/24 | 514 | 519 | 513 | 516 | +0.19% | 25,200 | 213億8820万 | +0.58% |
| 06/21 | 516 | 519 | 515 | 515 | 0% | 4,900 | 213億4675万 | +0.39% |
| 06/20 | 515 | 517 | 511 | 515 | +0.39% | 13,000 | 213億4675万 | +0.39% |
| 06/19 | 520 | 521 | 511 | 513 | -0.97% | 16,200 | 212億6385万 | 0% |
| 06/18 | 523 | 523 | 515 | 518 | 0% | 13,500 | 214億7110万 | +0.78% |
| 06/17 | 513 | 521 | 512 | 518 | +0.39% | 18,200 | 214億7110万 | +0.78% |
| 06/14 | 521 | 526 | 516 | 516 | -0.77% | 4,500 | 213億8820万 | +0.39% |
| 06/13 | 521 | 522 | 518 | 520 | 0% | 9,700 | 215億5400万 | +1.17% |
| 06/12 | 528 | 528 | 512 | 520 | -1.14% | 16,600 | 215億5400万 | +0.97% |
