| 2026 |
| 10/30 | 3,370 | 3,445 | 3,360 | 3,435 | +1.93% | 120,100 | - | +6.98% |
| 10/29 | 3,295 | 3,370 | 3,295 | 3,370 | +2.43% | 676,400 | - | +5.08% |
| 10/29 | (空売り報告)モルガン・スタンレーMUFG証券 206,766株(0.67%)再IN |
| 10/28 | 3,350 | 3,350 | 3,270 | 3,290 | -2.66% | 96,000 | - | +2.59% |
| 10/27 | (IR情報)16:00 剰余金の配当(中間配当)に関するお知らせ |
| 10/27 | 3,395 | 3,400 | 3,355 | 3,380 | -0.59% | 99,800 | - | +5.33% |
| 10/26 | 3,310 | 3,410 | 3,300 | 3,400 | +3.5% | 165,500 | - | +6.02% |
| 10/23 | 3,260 | 3,300 | 3,245 | 3,285 | +1.55% | 129,300 | - | +2.56% |
| 10/22 | 3,230 | 3,245 | 3,205 | 3,235 | +0.78% | 63,500 | - | +0.94% |
| 10/21 | 3,235 | 3,235 | 3,195 | 3,210 | +0.31% | 46,500 | - | +0.06% |
| 10/20 | 3,205 | 3,230 | 3,190 | 3,200 | -0.16% | 33,700 | - | -0.34% |
| 10/19 | 3,210 | 3,240 | 3,200 | 3,205 | +0.47% | 51,900 | - | -0.25% |
| 10/16 | 3,185 | 3,205 | 3,165 | 3,190 | +0.79% | 43,300 | - | -0.81% |
| 10/15 | 3,145 | 3,170 | 3,120 | 3,165 | +1.44% | 107,200 | - | -1.68% |
| 10/14 | 3,145 | 3,155 | 3,105 | 3,120 | -0.79% | 47,600 | - | -3.2% |
| 10/13 | (自社株買い)取締役会(2026年5月13日)での決議状況(取得期間2026年6月1日~2026年9月30日) |
| 10/13 | 3,145 | 3,170 | 3,140 | 3,145 | +0.32% | 50,000 | - | -2.69% |
| 10/09 | 3,115 | 3,145 | 3,095 | 3,135 | +1.46% | 60,200 | - | -3.27% |
| 10/08 | 3,130 | 3,130 | 3,080 | 3,090 | -0.8% | 53,200 | - | -4.95% |
| 10/07 | 3,075 | 3,130 | 3,070 | 3,115 | +0.97% | 47,900 | - | -4.56% |
| 10/06 | 3,110 | 3,110 | 3,065 | 3,085 | 0% | 54,500 | - | -5.86% |
| 10/05 | 3,075 | 3,100 | 3,050 | 3,085 | +0.33% | 61,800 | - | -6.26% |
| 10/02 | 3,085 | 3,095 | 3,055 | 3,075 | -0.97% | 55,400 | - | -6.96% |
| 10/01 | 3,135 | 3,140 | 3,090 | 3,105 | -1.27% | 70,900 | - | -6.33% |
| 09/30 | (IR情報)17:30 「統合報告書2026」発行のお知らせ |
| 09/30 | 3,160 | 3,170 | 3,130 | 3,145 | -0.47% | 97,200 | - | -5.39% |
| 09/29 | 3,255 | 3,255 | 3,150 | 3,160 | -4.82% | 219,800 | - | -5.16% |
| 09/28 | 3,355 | 3,360 | 3,315 | 3,320 | -0.6% | 316,700 | - | -0.54% |
| 09/25 | 3,335 | 3,355 | 3,315 | 3,340 | +0.6% | 138,200 | - | +0.09% |
| 09/24 | (IR情報)16:00 自己株式の取得状況および取得終了に関するお知らせ |
| 09/24 | 3,375 | 3,375 | 3,310 | 3,320 | -1.63% | 187,100 | - | -0.42% |
| 09/18 | 3,350 | 3,395 | 3,325 | 3,375 | +0.75% | 156,800 | - | +1.32% |
| 09/17 | 3,325 | 3,370 | 3,320 | 3,350 | +1.06% | 112,800 | - | +0.66% |
| 09/16 | 3,320 | 3,335 | 3,315 | 3,315 | 0% | 78,000 | - | -0.27% |
| 09/15 | 3,335 | 3,335 | 3,305 | 3,315 | 0% | 70,500 | - | -0.15% |
| 09/14 | 3,315 | 3,335 | 3,290 | 3,315 | +0.15% | 91,300 | - | -0.03% |
| 09/11 | 3,250 | 3,315 | 3,250 | 3,310 | +0.76% | 78,700 | - | 0% |
| 09/10 | (自社株買い)取締役会(2026年5月13日)での決議状況(取得期間2026年6月1日~2026年9月30日) |
| 09/10 | 3,270 | 3,295 | 3,255 | 3,285 | +0.46% | 66,700 | - | -0.54% |
| 09/09 | 3,270 | 3,285 | 3,255 | 3,270 | 0% | 71,100 | - | -0.7% |
| 09/08 | 3,250 | 3,285 | 3,240 | 3,270 | +0.15% | 71,300 | - | -0.49% |
| 09/07 | 3,275 | 3,280 | 3,240 | 3,265 | -0.15% | 109,800 | - | -0.52% |
| 09/04 | 3,325 | 3,325 | 3,250 | 3,270 | -2.24% | 165,700 | - | -0.3% |
| 09/03 | 3,350 | 3,360 | 3,315 | 3,345 | -0.3% | 85,100 | - | +2.01% |
| 09/02 | 3,380 | 3,380 | 3,330 | 3,355 | -1.18% | 57,700 | - | +2.38% |
| 09/01 | (IR情報)16:00 自己株式の取得状況に関するお知らせ |
| 09/01 | 3,395 | 3,395 | 3,360 | 3,395 | -0.59% | 73,200 | - | +3.79% |
| 08/31 | 3,430 | 3,445 | 3,405 | 3,415 | -0.44% | 59,500 | - | +4.69% |
| 08/28 | 3,450 | 3,455 | 3,415 | 3,430 | -0.15% | 51,400 | - | +5.54% |
| 08/27 | 3,440 | 3,470 | 3,420 | 3,435 | 0% | 58,200 | - | +6.12% |
| 08/26 | 3,350 | 3,465 | 3,340 | 3,435 | +2.84% | 76,800 | - | +6.45% |
| 08/25 | 3,345 | 3,365 | 3,330 | 3,340 | +0.3% | 36,900 | - | +3.89% |
| 08/24 | 3,350 | 3,370 | 3,325 | 3,330 | -0.3% | 40,600 | - | +3.8% |
| 08/21 | 3,330 | 3,350 | 3,315 | 3,340 | +0.6% | 48,900 | - | +4.34% |
| 08/20 | 3,285 | 3,325 | 3,280 | 3,320 | +1.22% | 61,400 | - | +3.98% |
| 08/19 | 3,275 | 3,290 | 3,255 | 3,280 | +0.15% | 32,100 | - | +2.92% |
| 08/18 | 3,250 | 3,285 | 3,225 | 3,275 | +0.77% | 43,400 | - | +2.99% |
| 08/17 | 3,295 | 3,295 | 3,250 | 3,250 | -0.91% | 42,400 | - | +2.36% |
| 08/14 | 3,265 | 3,285 | 3,250 | 3,280 | +0.46% | 52,600 | - | +3.47% |
| 08/13 | 3,230 | 3,265 | 3,220 | 3,265 | +1.56% | 49,000 | - | +3.16% |
| 08/12 | 3,225 | 3,255 | 3,205 | 3,215 | 0% | 44,500 | - | +1.71% |
| 08/10 | 3,165 | 3,235 | 3,155 | 3,215 | +1.9% | 66,700 | - | +1.84% |
| 08/07 | (IR情報)16:00 2027年3月期第1四半期決算補足資料 |
| 08/07 | (IR情報)16:00 2027年3月期第1四半期決算短信〔日本基準〕(連結) |
| 08/07 | (IR情報)16:00 化成品の新研究開発拠点「Material Nexus Lab(仮称)」を2028年に新設 |
| 08/07 | (自社株買い)取締役会(2026年5月13日)での決議状況(取得期間2026年6月1日~2026年9月30日) |
| 08/07 | (5%ルール)理研ビタミン取引先持株会理事長保坂晴彦(11.05%) |
| 08/07 | (5%ルール)理研ビタミン取引先持株会理事長小林光夫(0%) |
| 08/07 | 3,130 | 3,180 | 3,115 | 3,155 | +0.8% | 57,600 | - | +0.1% |
| 08/06 | 3,070 | 3,135 | 3,070 | 3,130 | +2.45% | 63,600 | - | -0.63% |
| 08/05 | 3,085 | 3,085 | 3,050 | 3,055 | -1.29% | 58,700 | - | -2.89% |
| 08/04 | 3,160 | 3,190 | 3,080 | 3,095 | -2.06% | 57,900 | - | -1.62% |
| 08/03 | (IR情報)16:00 自己株式の取得状況に関するお知らせ |
| 08/03 | 3,170 | 3,180 | 3,120 | 3,160 | -1.56% | 74,200 | - | +0.45% |
| 07/31 | 3,260 | 3,260 | 3,195 | 3,210 | -1.53% | 59,000 | - | +2.13% |
| 07/30 | 3,280 | 3,285 | 3,240 | 3,260 | -0.61% | 63,000 | - | +3.89% |
| 07/29 | 3,220 | 3,295 | 3,220 | 3,280 | +2.5% | 102,200 | - | +4.83% |
| 07/28 | 3,190 | 3,210 | 3,175 | 3,200 | +0.79% | 71,600 | - | +2.63% |
| 07/27 | 3,150 | 3,185 | 3,125 | 3,175 | +1.76% | 76,200 | - | +2.09% |
| 07/24 | 3,095 | 3,125 | 3,075 | 3,120 | +0.16% | 48,700 | - | +0.55% |
| 07/23 | 3,135 | 3,140 | 3,095 | 3,115 | -1.58% | 91,300 | - | +0.55% |
| 07/22 | 3,155 | 3,165 | 3,125 | 3,165 | +0.32% | 70,300 | - | +2.39% |
| 07/21 | (IR情報)16:00 工場用地の取得に関するお知らせ |
| 07/21 | 3,180 | 3,205 | 3,135 | 3,155 | 0% | 82,400 | - | +2.27% |
| 07/17 | 3,155 | 3,175 | 3,130 | 3,155 | +0.32% | 51,900 | - | +2.5% |
| 07/16 | 3,160 | 3,170 | 3,135 | 3,145 | -0.32% | 46,800 | - | +2.38% |
| 07/15 | 3,155 | 3,155 | 3,120 | 3,155 | 0% | 54,700 | - | +2.9% |
| 07/14 | 3,150 | 3,170 | 3,125 | 3,155 | +0.96% | 47,800 | - | +3.14% |
| 07/13 | 3,115 | 3,155 | 3,115 | 3,125 | -0.32% | 54,300 | - | +2.43% |
| 07/10 | (自社株買い)取締役会(2026年5月13日)での決議状況(取得期間2026年6月1日~2026年9月30日) |
| 07/10 | 3,145 | 3,145 | 3,100 | 3,135 | -0.16% | 62,400 | - | +3.02% |
| 07/09 | 3,125 | 3,150 | 3,115 | 3,140 | -0.16% | 58,100 | - | +3.49% |
| 07/08 | 3,165 | 3,175 | 3,140 | 3,145 | -0.63% | 51,600 | - | +4.07% |
| 07/07 | 3,120 | 3,170 | 3,095 | 3,165 | +1.61% | 78,300 | - | +5.11% |
| 07/06 | 3,095 | 3,120 | 3,090 | 3,115 | +0.65% | 47,400 | - | +3.9% |
| 07/03 | 3,100 | 3,125 | 3,085 | 3,095 | 0% | 58,300 | - | +3.65% |
| 07/02 | 3,055 | 3,100 | 3,055 | 3,095 | +1.81% | 42,100 | - | +4.03% |
| 07/01 | (IR情報)16:00 自己株式の取得状況に関するお知らせ |
| 07/01 | 3,060 | 3,060 | 3,025 | 3,040 | -0.65% | 48,600 | - | +2.63% |
| 06/30 | 3,100 | 3,105 | 3,050 | 3,060 | -0.97% | 47,700 | - | +3.69% |
| 06/29 | 3,100 | 3,105 | 3,055 | 3,090 | +0.32% | 77,800 | - | +5.14% |
| 06/26 | 3,085 | 3,105 | 3,055 | 3,080 | +0.16% | 56,700 | - | +5.3% |
| 06/25 | 3,055 | 3,095 | 3,055 | 3,075 | +0.82% | 140,200 | - | +5.53% |
| 06/24 | 3,020 | 3,055 | 3,000 | 3,050 | +1.5% | 80,500 | - | +5.06% |
| 06/23 | 2,997 | 3,040 | 2,997 | 3,005 | +0.17% | 115,100 | - | +3.91% |
| 06/22 | 2,989 | 3,005 | 2,970 | 3,000 | +0.4% | 67,100 | - | +4.06% |
| 06/19 | 2,988 | 3,000 | 2,960 | 2,988 | -0.33% | 118,900 | - | +3.97% |
| 06/18 | 2,945 | 3,005 | 2,933 | 2,998 | +1.59% | 77,600 | - | +4.53% |
| 06/17 | 3,010 | 3,035 | 2,945 | 2,951 | -1.8% | 65,700 | - | +3.22% |
| 06/16 | 2,992 | 3,025 | 2,956 | 3,005 | +0.43% | 79,400 | - | +5.51% |
| 06/15 | 3,000 | 3,020 | 2,979 | 2,992 | -0.1% | 75,100 | - | +5.5% |
| 06/12 | 2,991 | 3,035 | 2,965 | 2,995 | +0.13% | 96,200 | - | +5.98% |
| 06/11 | 2,974 | 2,996 | 2,958 | 2,991 | +0.17% | 82,200 | - | +6.29% |
| 06/10 | (自社株買い)取締役会(2026年5月13日)での決議状況(取得期間2026年6月1日~2026年9月30日) |
| 06/10 | 2,958 | 3,010 | 2,958 | 2,986 | +0.98% | 82,400 | - | +6.49% |
| 06/09 | 2,921 | 2,960 | 2,921 | 2,957 | +1.23% | 96,600 | - | +5.76% |
| 06/08 | 2,913 | 2,944 | 2,893 | 2,921 | +0.27% | 88,300 | - | +4.77% |
| 06/05 | 2,871 | 2,920 | 2,858 | 2,913 | +2.32% | 95,700 | - | +4.75% |