| 2021 |
| 01/12 | 4,385 | 4,395 | 4,385 | 4,385 | 0% | 6,400 | 228億5374万 | +0.09% |
| 01/12 | （IR情報）9:00 当社株式の上場廃止に関するお知らせ |
| 01/08 | 4,385 | 4,385 | 4,385 | 4,385 | 0% | 6,800 | 228億5374万 | +0.07% |
| 01/07 | 4,385 | 4,390 | 4,385 | 4,385 | -0.11% | 5,400 | 228億5374万 | +0.07% |
| 01/06 | 4,385 | 4,390 | 4,385 | 4,390 | +0.11% | 2,200 | 228億7980万 | +0.18% |
| 01/05 | 4,385 | 4,390 | 4,385 | 4,385 | +0.11% | 5,200 | 228億5374万 | +0.07% |
| 01/04 | 4,380 | 4,385 | 4,380 | 4,380 | 0% | 6,800 | 228億2768万 | -0.07% |
| 2020 |
| 12/30 | 4,385 | 4,385 | 4,380 | 4,380 | 0% | 600 | 228億2768万 | -0.07% |
| 12/29 | 4,380 | 4,385 | 4,380 | 4,380 | 0% | 2,900 | 228億2768万 | -0.09% |
| 12/28 | （5%ルール）JSR（99.21%） |
| 12/28 | 4,380 | 4,385 | 4,380 | 4,380 | -0.11% | 6,700 | 228億2768万 | -0.11% |
| 12/25 | 4,380 | 4,385 | 4,380 | 4,385 | +0.11% | 4,100 | 228億5374万 | 0% |
| 12/24 | 4,385 | 4,385 | 4,380 | 4,380 | 0% | 2,300 | 228億2768万 | -0.14% |
| 12/23 | 4,375 | 4,385 | 4,375 | 4,380 | +0.11% | 12,000 | 228億2768万 | -0.14% |
| 12/22 | 4,375 | 4,380 | 4,375 | 4,375 | 0% | 8,600 | 228億162万 | -0.27% |
| 12/21 | 4,375 | 4,380 | 4,375 | 4,375 | 0% | 3,000 | 228億162万 | -0.27% |
| 12/18 | （IR情報）15:00 JSR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 |
| 12/18 | （5%ルール）JPモルガン証券（0.2%）ジェー・ピー・モルガン・セキュリティーズ・ピーエ…（2.07%） |
| 12/18 | 4,380 | 4,380 | 4,375 | 4,375 | 0% | 2,400 | 228億162万 | -0.27% |
| 12/17 | （5%ルール）JSR（92%） |
| 12/17 | 4,375 | 4,375 | 4,375 | 4,375 | 0% | 1,200 | 228億162万 | -0.3% |
| 12/16 | 4,380 | 4,380 | 4,375 | 4,375 | 0% | 900 | 228億162万 | -0.3% |
| 12/15 | 4,380 | 4,380 | 4,375 | 4,375 | -0.11% | 1,400 | 228億162万 | -0.32% |
| 12/14 | 4,375 | 4,385 | 4,375 | 4,380 | +0.11% | 18,400 | 228億2768万 | -0.21% |
| 12/11 | （IR情報）15:00 支配株主であるJSR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 |
| 12/11 | 4,375 | 4,375 | 4,375 | 4,375 | 0% | 2,700 | 228億162万 | -0.32% |
| 12/10 | 4,380 | 4,380 | 4,375 | 4,375 | -0.11% | 11,000 | 228億162万 | -0.34% |
| 12/09 | 4,385 | 4,390 | 4,380 | 4,380 | -0.23% | 21,000 | 228億2768万 | -0.23% |
| 12/08 | 4,395 | 4,395 | 4,390 | 4,390 | 0% | 10,700 | 228億7980万 | 0% |
| 12/07 | 4,395 | 4,400 | 4,390 | 4,390 | -0.11% | 24,100 | 228億7980万 | 0% |
| 12/04 | 4,395 | 4,400 | 4,395 | 4,395 | 0% | 6,400 | 229億586万 | +0.11% |
| 12/03 | （5%ルール）JPモルガン証券（4.04%）ジェー・ピー・モルガン・セキュリティーズ・ピーエ…（1.34%） |
| 12/03 | 4,395 | 4,400 | 4,395 | 4,395 | 0% | 35,200 | 229億586万 | +0.25% |
| 12/02 | 4,395 | 4,400 | 4,395 | 4,395 | +0.11% | 55,600 | 229億586万 | +1.01% |
| 12/01 | 4,395 | 4,395 | 4,390 | 4,390 | -0.11% | 106,600 | 228億7980万 | +1.81% |
| 11/30 | 4,395 | 4,400 | 4,395 | 4,395 | 0% | 12,200 | 229億586万 | +2.78% |
| 11/27 | 4,395 | 4,400 | 4,395 | 4,395 | 0% | 7,800 | 229億586万 | +3.68% |
| 11/26 | 4,395 | 4,400 | 4,395 | 4,395 | -0.11% | 6,100 | 229億586万 | +4.44% |
| 11/25 | 4,395 | 4,400 | 4,395 | 4,400 | +0.11% | 34,900 | 229億3192万 | +5.44% |
| 11/24 | 4,390 | 4,400 | 4,390 | 4,395 | 0% | 145,300 | 229億586万 | +6.19% |
| 11/20 | 4,390 | 4,395 | 4,390 | 4,395 | 0% | 15,500 | 229億586万 | +7.09% |
| 11/19 | 4,390 | 4,395 | 4,390 | 4,395 | 0% | 18,900 | 229億586万 | +7.93% |
| 11/18 | 4,390 | 4,395 | 4,385 | 4,395 | +0.23% | 198,700 | 229億586万 | +8.68% |
| 11/17 | 4,385 | 4,390 | 4,385 | 4,385 | 0% | 39,500 | 228億5374万 | +9.27% |
| 11/16 | 4,390 | 4,390 | 4,385 | 4,385 | 0% | 49,800 | 228億5374万 | +10.07% |
| 11/13 | 4,385 | 4,390 | 4,385 | 4,385 | 0% | 29,700 | 228億5374万 | +10.98% |
| 11/12 | 4,390 | 4,390 | 4,385 | 4,385 | 0% | 30,700 | 228億5374万 | +12.12% |
| 11/11 | 4,385 | 4,390 | 4,385 | 4,385 | 0% | 72,300 | 228億5374万 | +13.22% |
| 11/10 | 4,385 | 4,390 | 4,385 | 4,385 | 0% | 134,900 | 228億5374万 | +14.37% |
| 11/09 | 4,385 | 4,390 | 4,385 | 4,385 | -0.11% | 64,900 | 228億5374万 | +15.55% |
| 11/06 | 4,390 | 4,390 | 4,385 | 4,390 | +0.11% | 50,900 | 228億7980万 | +17.13% |
| 11/05 | 4,385 | 4,390 | 4,385 | 4,385 | 0% | 83,900 | 228億5374万 | +18.42% |
| 11/04 | 4,390 | 4,390 | 4,385 | 4,385 | 0% | 39,000 | 228億5374万 | +19.78% |
| 11/02 | 4,390 | 4,390 | 4,385 | 4,385 | 0% | 141,300 | 228億5374万 | +21.27% |
| 10/30 | 4,380 | 4,390 | 4,380 | 4,385 | +0.11% | 365,700 | 228億5374万 | +22.79% |
| 10/29 | （IR情報）17:00 (訂正)「JSR株式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及び応募推奨のお知らせ」の一部訂正に関するお知らせ |
| 10/29 | 4,385 | 4,390 | 4,380 | 4,380 | +2.94% | 478,300 | 228億2768万 | +24.26% |
| 10/28 | 4,255 | 4,255 | 4,255 | 4,255 | +19.69% | 30,600 | 221億7620万 | +22.06% |
| 10/27 | （IR情報）15:00 JSR株式会社による当社普通株式に対する公開買付けに関する意見表明及び応募推奨のお知らせ |
| 10/27 | （IR情報）15:00 2021年3月期第2四半期決算短信〔日本基準〕(連結) |
| 10/27 | （IR情報）15:00 業績予想の修正に関するお知らせ |
| 10/27 | 3,400 | 3,595 | 3,380 | 3,555 | +3.34% | 60,500 | 185億2794万 | +2.95% |
| 10/26 | 3,525 | 3,525 | 3,405 | 3,440 | -0.86% | 24,800 | 179億2859万 | -0.12% |
| 10/23 | 3,470 | 3,485 | 3,355 | 3,470 | 0% | 40,700 | 180億8494万 | +0.87% |
| 10/22 | 3,605 | 3,605 | 3,455 | 3,470 | -4.14% | 44,200 | 180億8494万 | +1.11% |
| 10/21 | 3,545 | 3,640 | 3,540 | 3,620 | +2.84% | 40,600 | 188億6671万 | +5.79% |
| 10/20 | 3,505 | 3,555 | 3,470 | 3,520 | -1.12% | 23,000 | 183億4553万 | +3.29% |
| 10/19 | 3,545 | 3,585 | 3,505 | 3,560 | +0.85% | 23,000 | 185億5400万 | +4.86% |
| 10/16 | 3,610 | 3,610 | 3,470 | 3,530 | -1.67% | 47,600 | 183億9765万 | +4.38% |
| 10/15 | （IR情報）15:00 新型コロナウイルスに対する中和抗体を測定するキット（研究用試薬）発売のお知らせ |
| 10/15 | 3,690 | 3,690 | 3,570 | 3,590 | -2.45% | 43,700 | 187億1036万 | +6.47% |
| 10/14 | 3,620 | 3,690 | 3,575 | 3,680 | +1.52% | 30,700 | 191億7942万 | +9.69% |
| 10/13 | 3,670 | 3,700 | 3,565 | 3,625 | -1.36% | 44,400 | 188億9277万 | +8.7% |
| 10/12 | 3,600 | 3,675 | 3,515 | 3,675 | +3.81% | 63,100 | 191億5336万 | +10.73% |
| 10/09 | 3,405 | 3,580 | 3,320 | 3,540 | +3.96% | 81,600 | 184億4977万 | +7.21% |
| 10/08 | 3,435 | 3,450 | 3,400 | 3,405 | -0.87% | 29,000 | 177億4617万 | +3.62% |
| 10/07 | 3,390 | 3,440 | 3,350 | 3,435 | +0.73% | 36,500 | 179億253万 | +4.89% |
| 10/06 | 3,300 | 3,420 | 3,240 | 3,410 | +0.59% | 45,900 | 177億7223万 | +4.63% |
| 10/05 | 3,285 | 3,415 | 3,270 | 3,390 | +4.95% | 81,200 | 176億6800万 | +4.34% |
| 10/02 | 3,335 | 3,335 | 3,175 | 3,230 | -1.07% | 66,100 | 168億3411万 | -0.4% |
| 09/30 | 3,300 | 3,340 | 3,245 | 3,265 | -1.51% | 26,000 | 170億1652万 | +0.74% |
| 09/29 | 3,295 | 3,340 | 3,270 | 3,315 | +1.38% | 20,700 | 172億7711万 | +2.28% |
| 09/28 | 3,335 | 3,335 | 3,210 | 3,270 | +0.15% | 18,200 | 170億4258万 | +1.08% |
| 09/25 | 3,250 | 3,295 | 3,240 | 3,265 | +1.08% | 13,500 | 170億1652万 | +1.08% |
| 09/24 | 3,400 | 3,400 | 3,230 | 3,230 | -5% | 31,400 | 168億3411万 | +0.03% |
| 09/23 | 3,435 | 3,455 | 3,360 | 3,400 | -0.73% | 36,400 | 177億2012万 | +5.3% |
| 09/18 | 3,330 | 3,440 | 3,330 | 3,425 | +2.85% | 43,000 | 178億5041万 | +6.47% |
| 09/17 | 3,340 | 3,340 | 3,270 | 3,330 | -0.3% | 12,400 | 173億5529万 | +3.9% |
| 09/16 | 3,285 | 3,360 | 3,275 | 3,340 | +1.83% | 31,900 | 174億741万 | +4.54% |
| 09/15 | 3,225 | 3,280 | 3,220 | 3,280 | +1.71% | 16,500 | 170億9470万 | +3.05% |
| 09/14 | 3,270 | 3,270 | 3,220 | 3,225 | -1.07% | 7,300 | 168億805万 | +1.54% |
| 09/11 | 3,185 | 3,275 | 3,185 | 3,260 | +1.56% | 14,800 | 169億9046万 | +2.84% |
| 09/10 | 3,275 | 3,275 | 3,185 | 3,210 | -0.77% | 11,000 | 167億2987万 | +1.45% |
| 09/09 | 3,200 | 3,260 | 3,190 | 3,235 | -0.77% | 11,900 | 168億6017万 | +2.24% |
| 09/08 | 3,200 | 3,280 | 3,150 | 3,260 | +2.68% | 22,000 | 169億9046万 | +3.23% |
| 09/07 | 3,150 | 3,205 | 3,120 | 3,175 | -0.47% | 23,100 | 165億4746万 | +1.02% |
| 09/04 | 3,150 | 3,210 | 3,150 | 3,190 | -1.09% | 16,100 | 166億2564万 | +1.92% |
| 09/03 | 3,200 | 3,255 | 3,180 | 3,225 | -0.15% | 17,300 | 168億805万 | +3.4% |
| 09/02 | 3,250 | 3,290 | 3,200 | 3,230 | +2.22% | 30,300 | 168億3411万 | +3.83% |
| 09/01 | 3,130 | 3,195 | 3,120 | 3,160 | +0.96% | 9,800 | 164億6928万 | +1.38% |
| 08/31 | 3,045 | 3,175 | 3,045 | 3,130 | +3.13% | 23,500 | 163億1293万 | +0.29% |
| 08/28 | 3,160 | 3,185 | 3,020 | 3,035 | -3.96% | 43,200 | 158億1781万 | -2.97% |
| 08/27 | 3,215 | 3,230 | 3,160 | 3,160 | -2.02% | 16,200 | 164億6928万 | +0.8% |
| 08/26 | 3,125 | 3,325 | 3,120 | 3,225 | +0.94% | 28,800 | 168億805万 | +2.87% |
| 08/25 | 3,280 | 3,280 | 3,185 | 3,195 | -1.99% | 19,500 | 166億5170万 | +1.95% |
| 08/24 | 3,250 | 3,270 | 3,200 | 3,260 | +3.49% | 22,300 | 169億9046万 | +4.02% |
| 08/21 | 3,165 | 3,195 | 3,135 | 3,150 | -0.47% | 14,300 | 164億1717万 | +0.54% |
| 08/20 | 3,200 | 3,255 | 3,155 | 3,165 | -2.31% | 23,200 | 164億9534万 | +0.96% |
| 08/19 | 3,205 | 3,250 | 3,190 | 3,240 | +0.31% | 21,900 | 168億8623万 | +3.25% |
| 08/18 | 3,195 | 3,275 | 3,135 | 3,230 | +4.87% | 54,500 | 168億3411万 | +3.03% |
| 08/17 | 3,100 | 3,115 | 3,065 | 3,080 | -1.6% | 35,000 | 160億5234万 | -1.79% |
| 08/14 | 3,075 | 3,140 | 3,065 | 3,130 | +1.13% | 15,400 | 163億1293万 | -0.45% |
