| 2017 |
| 04/25 | 976 | 994 | 956 | 977 | -1.41% | 348,100 | 506億5736万 | -2.1% |
| 04/24 | 976 | 999 | 973 | 991 | +2.16% | 47,800 | 513億8326万 | -0.9% |
| 04/21 | 972 | 979 | 970 | 970 | -0.21% | 31,000 | 502億9441万 | -3.19% |
| 04/20 | 966 | 980 | 966 | 972 | +1.25% | 26,800 | 503億9811万 | -3.19% |
| 04/19 | 969 | 984 | 960 | 960 | -2.44% | 29,400 | 497億7592万 | -4.57% |
| 04/18 | 973 | 991 | 973 | 984 | +2.29% | 34,900 | 510億2031万 | -2.48% |
| 04/17 | 964 | 980 | 958 | 962 | -0.62% | 34,300 | 498億7962万 | -4.94% |
| 04/14 | 964 | 980 | 963 | 968 | 0% | 34,700 | 501億9071万 | -4.72% |
| 04/13 | 985 | 991 | 967 | 968 | -2.62% | 48,000 | 501億9071万 | -5.28% |
| 04/12 | 996 | 1,002 | 988 | 994 | -1.29% | 20,900 | 515億3881万 | -3.4% |
| 04/11 | 998 | 1,024 | 996 | 1,007 | +0.4% | 21,500 | 522億1286万 | -2.61% |
| 04/10 | 1,003 | 1,006 | 996 | 1,003 | +0.7% | 27,400 | 520億546万 | -3.37% |
| 04/07 | 998 | 1,007 | 964 | 996 | 0% | 60,000 | 516億4251万 | -4.32% |
| 04/06 | 1,007 | 1,015 | 996 | 996 | -1.48% | 50,400 | 516億4251万 | -4.69% |
| 04/05 | 1,003 | 1,015 | 1,003 | 1,011 | +0.2% | 40,800 | 524億2026万 | -3.62% |
| 04/04 | 1,023 | 1,023 | 1,002 | 1,009 | -1.37% | 31,200 | 523億1656万 | -4.18% |
| 04/03 | 1,020 | 1,031 | 1,006 | 1,023 | +1.29% | 52,700 | 530億4246万 | -3.03% |
| 03/31 | 1,028 | 1,032 | 1,010 | 1,010 | -1.46% | 43,500 | 523億6841万 | -4.45% |
| 03/30 | 1,032 | 1,039 | 1,022 | 1,025 | -0.1% | 72,500 | 531億4616万 | -3.21% |
| 03/29 | 1,040 | 1,044 | 1,020 | 1,026 | -1.54% | 30,300 | 531億9801万 | -3.21% |
| 03/28 | 1,022 | 1,042 | 1,019 | 1,042 | +3.48% | 39,400 | 540億2761万 | -1.79% |
| 03/27 | 1,012 | 1,020 | 1,006 | 1,007 | -1.95% | 21,700 | 522億1286万 | -5.09% |
| 03/24 | 1,010 | 1,030 | 1,010 | 1,027 | +1.88% | 23,100 | 532億4986万 | -3.48% |
| 03/23 | 1,005 | 1,010 | 999 | 1,008 | -0.2% | 29,400 | 522億6471万 | -5.35% |
| 03/22 | 1,003 | 1,020 | 996 | 1,010 | -2.23% | 50,900 | 523億6841万 | -5.43% |
| 03/21 | 1,040 | 1,044 | 1,028 | 1,033 | -0.77% | 22,200 | 535億6096万 | -3.37% |
| 03/17 | 1,024 | 1,041 | 1,018 | 1,041 | +1.86% | 48,400 | 539億7576万 | -2.62% |
| 03/16 | 1,005 | 1,026 | 1,001 | 1,022 | +0.49% | 43,500 | 529億9061万 | -4.4% |
| 03/15 | 1,035 | 1,036 | 1,009 | 1,017 | -1.93% | 48,700 | 527億3136万 | -4.78% |
| 03/14 | 1,060 | 1,060 | 1,037 | 1,037 | -1.8% | 32,800 | 537億6836万 | -2.9% |
| 03/13 | 1,059 | 1,072 | 1,047 | 1,056 | -0.66% | 61,300 | 547億5351万 | -1.12% |
| 03/10 | 1,100 | 1,100 | 1,040 | 1,063 | -4.49% | 137,700 | 551億1646万 | -0.37% |
| 03/09 | 1,120 | 1,131 | 1,094 | 1,113 | -2.37% | 75,100 | 577億895万 | +4.41% |
| 03/08 | （IR情報）15:00 平成29年10月期第1四半期決算短信〔日本基準〕(連結) |
| 03/08 | 1,124 | 1,165 | 1,124 | 1,140 | +1.69% | 64,300 | 591億890万 | +7.34% |
| 03/07 | 1,101 | 1,142 | 1,100 | 1,121 | +0.63% | 87,500 | 581億2375万 | +5.85% |
| 03/06 | 1,075 | 1,117 | 1,068 | 1,114 | +3.15% | 65,100 | 577億6080万 | +5.49% |
| 03/03 | 1,099 | 1,104 | 1,076 | 1,080 | -2.09% | 52,700 | 559億9791万 | +2.56% |
| 03/02 | 1,101 | 1,112 | 1,096 | 1,103 | +0.91% | 45,600 | 571億9045万 | +4.75% |
| 03/01 | 1,105 | 1,105 | 1,079 | 1,093 | -1.09% | 50,600 | 566億7195万 | +3.9% |
| 02/28 | 1,079 | 1,119 | 1,077 | 1,105 | +3.37% | 94,100 | 572億9415万 | +5.14% |
| 02/27 | 1,053 | 1,079 | 1,050 | 1,069 | +0.85% | 72,100 | 554億2756万 | +1.91% |
| 02/24 | 1,047 | 1,063 | 1,043 | 1,060 | -0.09% | 56,100 | 549億6091万 | +1.15% |
| 02/23 | 1,045 | 1,063 | 1,041 | 1,061 | +1.63% | 94,200 | 550億1276万 | +1.24% |
| 02/22 | 1,050 | 1,062 | 1,038 | 1,044 | -0.57% | 51,400 | 541億3131万 | -0.48% |
| 02/21 | 1,053 | 1,053 | 1,043 | 1,050 | -0.47% | 22,400 | 544億4241万 | 0% |
| 02/20 | 1,071 | 1,071 | 1,040 | 1,055 | -1.49% | 32,100 | 547億166万 | +0.38% |
| 02/17 | 1,066 | 1,078 | 1,061 | 1,071 | +0.47% | 40,900 | 555億3126万 | +1.9% |
| 02/16 | 1,068 | 1,079 | 1,064 | 1,066 | -0.19% | 17,000 | 552億7201万 | +1.33% |
| 02/15 | 1,050 | 1,072 | 1,050 | 1,068 | +3.19% | 55,100 | 553億7571万 | +1.33% |
| 02/14 | 1,046 | 1,065 | 1,035 | 1,035 | -0.58% | 50,400 | 536億6466万 | -1.99% |
| 02/13 | 1,047 | 1,048 | 1,035 | 1,041 | +1.07% | 56,700 | 539億7576万 | -1.79% |
| 02/10 | 1,027 | 1,039 | 1,023 | 1,030 | +1.38% | 59,400 | 534億541万 | -3.1% |
| 02/09 | 1,021 | 1,027 | 1,013 | 1,016 | -0.49% | 21,300 | 526億7951万 | -4.78% |
| 02/08 | 1,019 | 1,026 | 1,013 | 1,021 | +0.29% | 28,500 | 529億3876万 | -4.76% |
| 02/07 | 1,027 | 1,027 | 1,018 | 1,018 | -1.64% | 30,500 | 527億8321万 | -5.48% |
| 02/06 | 1,046 | 1,049 | 1,030 | 1,035 | -0.48% | 25,600 | 536億6466万 | -4.17% |
| 02/03 | 1,037 | 1,046 | 1,032 | 1,040 | +1.36% | 29,600 | 539億2391万 | -4.06% |
| 02/02 | 1,055 | 1,059 | 1,025 | 1,026 | -2.38% | 31,500 | 531億9801万 | -5.87% |
| 02/01 | 1,036 | 1,055 | 1,034 | 1,051 | +0.19% | 20,000 | 544億9426万 | -3.93% |
| 01/31 | 1,031 | 1,054 | 1,031 | 1,049 | 0% | 76,100 | 543億9056万 | -4.46% |
| 01/30 | 1,060 | 1,060 | 1,042 | 1,049 | -1.5% | 31,900 | 543億9056万 | -4.9% |
| 01/27 | 1,089 | 1,089 | 1,050 | 1,065 | -1.48% | 40,400 | 552億2016万 | -4.05% |
| 01/26 | 1,086 | 1,094 | 1,070 | 1,081 | +1.22% | 31,700 | 560億4976万 | -2.96% |
| 01/25 | 1,095 | 1,095 | 1,066 | 1,068 | +0.66% | 46,000 | 553億7571万 | -4.39% |
| 01/24 | （IR情報）15:00 株主優待制度の変更に関するお知らせ |
| 01/24 | （IR情報）15:00 役員体制のお知らせ |
| 01/24 | 1,040 | 1,063 | 1,040 | 1,061 | +1.73% | 35,600 | 550億1276万 | -5.35% |
| 01/23 | 1,055 | 1,058 | 1,041 | 1,043 | -2.34% | 32,800 | 540億7946万 | -7.29% |
| 01/20 | 1,076 | 1,077 | 1,064 | 1,068 | -1.66% | 32,400 | 553億7571万 | -5.49% |
| 01/19 | 1,089 | 1,093 | 1,070 | 1,086 | +1.97% | 41,100 | 563億900万 | -4.23% |
| 01/18 | 1,049 | 1,068 | 1,045 | 1,065 | +0.85% | 44,600 | 552億2016万 | -6.5% |
| 01/17 | 1,073 | 1,083 | 1,056 | 1,056 | -1.58% | 29,800 | 547億5351万 | -7.61% |
| 01/16 | 1,110 | 1,110 | 1,062 | 1,073 | -2.54% | 61,800 | 556億3496万 | -6.53% |
| 01/13 | 1,098 | 1,111 | 1,098 | 1,101 | 0% | 24,600 | 570億8675万 | -4.18% |
| 01/12 | 1,122 | 1,122 | 1,095 | 1,101 | -1.87% | 42,600 | 570億8675万 | -4.09% |
| 01/11 | 1,128 | 1,132 | 1,115 | 1,122 | -0.44% | 28,700 | 581億7560万 | -2.18% |
| 01/10 | 1,127 | 1,147 | 1,113 | 1,127 | -0.53% | 66,200 | 584億3485万 | -1.57% |
| 01/06 | 1,117 | 1,134 | 1,103 | 1,133 | +0.09% | 51,600 | 587億4595万 | -0.7% |
| 01/05 | 1,146 | 1,146 | 1,118 | 1,132 | -0.7% | 37,800 | 586億9410万 | -0.53% |
| 01/04 | 1,122 | 1,142 | 1,109 | 1,140 | +0.88% | 46,300 | 591億890万 | +0.62% |
| 2016 |
| 12/30 | 1,120 | 1,130 | 1,090 | 1,130 | +2.45% | 83,100 | 585億9040万 | +0.18% |
| 12/29 | 1,140 | 1,140 | 1,097 | 1,103 | -3.08% | 57,800 | 571億9045万 | -1.87% |
| 12/28 | 1,170 | 1,172 | 1,128 | 1,138 | -2.82% | 97,200 | 590億520万 | +1.52% |
| 12/27 | 1,130 | 1,188 | 1,130 | 1,171 | +3.54% | 111,000 | 607億1625万 | +4.93% |
| 12/26 | 1,115 | 1,148 | 1,115 | 1,131 | -1.22% | 72,300 | 586億4225万 | +2.35% |
| 12/22 | 1,164 | 1,164 | 1,127 | 1,145 | -2.64% | 68,800 | 593億6815万 | +4.57% |
| 12/21 | 1,220 | 1,242 | 1,167 | 1,176 | -4% | 121,700 | 609億7550万 | +8.39% |
| 12/20 | 1,180 | 1,228 | 1,173 | 1,225 | +5.06% | 179,400 | 635億1614万 | +14.06% |
| 12/19 | 1,099 | 1,173 | 1,089 | 1,166 | 0% | 165,900 | 604億5700万 | +9.79% |
| 12/16 | （IR情報）16:30 クミアイ化学工業株式会社とイハラケミカル工業株式会社の合併契約締結に関するお知らせ |
| 12/16 | （IR情報）16:00 支配株主等に関する事項について |
| 12/16 | （IR情報）16:00 平成28年度10月期決算短信〔日本基準〕(連結) |
| 12/16 | 1,160 | 1,193 | 1,138 | 1,166 | +0.34% | 55,000 | 604億5700万 | +10.73% |
| 12/15 | 1,161 | 1,186 | 1,149 | 1,162 | +0.35% | 47,800 | 602億4960万 | +11.41% |
| 12/14 | 1,180 | 1,188 | 1,148 | 1,158 | -1.7% | 33,500 | 600億4220万 | +12.54% |
| 12/13 | 1,164 | 1,181 | 1,164 | 1,178 | +0.08% | 41,300 | 610億7920万 | +15.6% |
| 12/12 | 1,203 | 1,215 | 1,161 | 1,177 | -1.67% | 56,200 | 610億2735万 | +16.88% |
| 12/09 | 1,174 | 1,227 | 1,165 | 1,197 | +2.84% | 89,500 | 620億6435万 | +20.3% |
| 12/08 | 1,185 | 1,201 | 1,136 | 1,164 | -1.85% | 88,000 | 603億5330万 | +18.41% |
| 12/07 | 1,127 | 1,188 | 1,127 | 1,186 | +7.23% | 127,800 | 614億9400万 | +21.89% |
| 12/06 | 1,098 | 1,118 | 1,084 | 1,106 | +2.6% | 116,000 | 573億4600万 | +15.09% |
| 12/05 | 1,061 | 1,080 | 1,048 | 1,078 | +1.41% | 52,400 | 558億9421万 | +13% |
| 12/02 | 1,074 | 1,082 | 1,048 | 1,063 | -1.02% | 56,800 | 551億1646万 | +12.13% |
| 12/01 | 1,061 | 1,088 | 1,054 | 1,074 | +3.57% | 68,000 | 556億8681万 | +13.89% |
| 11/30 | 1,045 | 1,106 | 1,034 | 1,037 | -0.67% | 268,900 | 537億6836万 | +10.67% |
