| 2020 |
| 03/05 | 2,994 | 2,997 | 2,993 | 2,993 | -0.03% | 2,500 | 82億3075万 | +12.56% |
| 03/04 | 2,995 | 2,995 | 2,993 | 2,994 | 0% | 5,000 | 82億3350万 | +15.15% |
| 03/03 | 2,994 | 2,995 | 2,994 | 2,994 | 0% | 2,700 | 82億3350万 | +17.78% |
| 03/02 | 2,995 | 2,995 | 2,993 | 2,994 | -0.07% | 1,500 | 82億3350万 | +20.63% |
| 02/28 | 2,994 | 2,996 | 2,994 | 2,996 | +0.07% | 2,800 | 82億3900万 | +23.7% |
| 02/27 | 2,994 | 2,994 | 2,994 | 2,994 | 0% | 16,100 | 82億3350万 | +26.76% |
| 02/26 | 2,994 | 2,995 | 2,993 | 2,994 | +0.03% | 12,500 | 82億3350万 | +30.06% |
| 02/25 | 2,993 | 2,994 | 2,993 | 2,993 | -0.07% | 15,500 | 82億3075万 | +33.56% |
| 02/21 | 2,995 | 2,995 | 2,995 | 2,995 | 0% | 600 | 82億3625万 | +37.39% |
| 02/20 | 2,993 | 2,995 | 2,993 | 2,995 | +0.07% | 6,000 | 82億3625万 | +41.41% |
| 02/19 | 2,993 | 2,995 | 2,993 | 2,993 | 0% | 4,100 | 82億3075万 | +45.29% |
| 02/18 | 2,993 | 2,995 | 2,993 | 2,993 | -0.03% | 2,400 | 82億3075万 | +49.87% |
| 02/17 | 2,993 | 2,994 | 2,993 | 2,994 | +0.03% | 10,800 | 82億3350万 | +55.13% |
| 02/14 | 2,993 | 2,994 | 2,993 | 2,993 | 0% | 26,500 | 82億3075万 | +60.65% |
| 02/13 | 2,993 | 2,994 | 2,993 | 2,993 | 0% | 13,900 | 82億3075万 | +66.74% |
| 02/12 | 2,993 | 2,994 | 2,993 | 2,993 | 0% | 20,900 | 82億3075万 | +73.21% |
| 02/10 | 2,994 | 2,994 | 2,992 | 2,993 | 0% | 39,900 | 82億3075万 | +80.3% |
| 02/07 | 2,994 | 2,995 | 2,991 | 2,993 | +17.33% | 145,900 | 82億3075万 | +87.88% |
| 02/06 | 2,551 | 2,551 | 2,551 | 2,551 | +24.38% | 4,500 | 70億1525万 | +67.39% |
| 02/05 | 16:00 三菱瓦斯化学株式会社による当社株券に対する公開買付けの開始に関する意見表明のお知らせ |
| 02/05 | 16:00 2020年3月期の期末配当予想の修正(無配)に関するお知らせ |
| 02/05 | 16:00 2020年3月期第3四半期決算短信[日本基準](連結) |
| 02/05 | 1,651 | 2,051 | 1,651 | 2,051 | +24.23% | 22,400 | 56億4025万 | +39.24% |
| 02/04 | 1,596 | 1,685 | 1,596 | 1,651 | +3.45% | 1,700 | 45億4025万 | +14.57% |
| 02/03 | 1,556 | 1,641 | 1,550 | 1,596 | +0.95% | 2,300 | 43億8900万 | +11.92% |
| 01/31 | 1,575 | 1,593 | 1,575 | 1,581 | +0.38% | 900 | 43億4775万 | +11.89% |
| 01/30 | 1,582 | 1,589 | 1,530 | 1,575 | -0.38% | 3,300 | 43億3125万 | +12.42% |
| 01/29 | 1,549 | 1,599 | 1,549 | 1,581 | +3.33% | 2,700 | 43億4775万 | +13.74% |
| 01/28 | 1,522 | 1,538 | 1,516 | 1,530 | +0.07% | 1,600 | 42億750万 | +11.03% |
| 01/27 | 1,501 | 1,529 | 1,500 | 1,529 | +1.87% | 1,500 | 42億475万 | +11.85% |
| 01/24 | 1,501 | 1,521 | 1,497 | 1,501 | +0.07% | 1,900 | 41億2775万 | +10.69% |
| 01/23 | 1,500 | 1,515 | 1,500 | 1,500 | +0.6% | 700 | 41億2500万 | +11.44% |
| 01/22 | 1,479 | 1,500 | 1,479 | 1,491 | +0.81% | 1,200 | 41億25万 | +11.52% |
| 01/21 | 1,476 | 1,479 | 1,476 | 1,479 | +0.48% | 200 | 40億6725万 | +11.37% |
| 01/20 | 1,472 | 1,472 | 1,472 | 1,472 | +0.48% | 500 | 40億4800万 | +11.6% |
| 01/17 | 1,467 | 1,494 | 1,464 | 1,465 | +0.34% | 1,900 | 40億2875万 | +11.83% |
| 01/16 | 1,536 | 1,536 | 1,453 | 1,460 | -4.95% | 6,100 | 40億1500万 | +12.14% |
| 01/15 | 1,475 | 1,649 | 1,475 | 1,536 | +7.19% | 13,100 | 42億2400万 | +18.7% |
| 01/14 | 1,329 | 1,499 | 1,329 | 1,433 | +9.22% | 8,300 | 39億4075万 | +11.69% |
| 01/10 | 1,312 | 1,312 | 1,312 | 1,312 | -0.53% | 200 | 36億800万 | +2.82% |
| 01/09 | 1,301 | 1,320 | 1,301 | 1,319 | +1.38% | 1,200 | 36億2725万 | +3.53% |
| 01/08 | 1,307 | 1,310 | 1,301 | 1,301 | -0.46% | 600 | 35億7775万 | +2.28% |
| 01/07 | 1,305 | 1,307 | 1,301 | 1,307 | +0.46% | 700 | 35億9425万 | +2.91% |
| 01/06 | 1,300 | 1,301 | 1,300 | 1,301 | -0.08% | 300 | 35億7775万 | +2.52% |
| 2019 |
| 12/30 | 1,278 | 1,302 | 1,278 | 1,302 | +1.88% | 1,200 | 35億8050万 | +2.76% |
| 12/27 | 1,274 | 1,278 | 1,274 | 1,278 | +0.71% | 300 | 35億1450万 | +1.11% |
| 12/25 | 1,269 | 1,269 | 1,268 | 1,269 | +0.08% | 1,300 | 34億8975万 | +0.4% |
| 12/24 | 1,274 | 1,274 | 1,268 | 1,268 | +0.48% | 200 | 34億8700万 | +0.32% |
| 12/20 | 1,262 | 1,262 | 1,262 | 1,262 | -1.25% | 100 | 34億7050万 | -0.16% |
| 12/19 | 1,268 | 1,278 | 1,268 | 1,278 | -0.78% | 200 | 35億1450万 | +1.19% |
| 12/18 | 1,288 | 1,288 | 1,288 | 1,288 | 0% | 300 | 35億4200万 | +1.98% |
| 12/17 | 1,272 | 1,308 | 1,270 | 1,288 | +1.18% | 4,900 | 35億4200万 | +2.14% |
| 12/13 | 1,266 | 1,273 | 1,266 | 1,273 | +0.55% | 3,600 | 35億75万 | +1.03% |
| 12/12 | 1,272 | 1,272 | 1,263 | 1,266 | +1.28% | 600 | 34億8150万 | +0.56% |
| 12/11 | 1,262 | 1,262 | 1,246 | 1,250 | -0.79% | 4,400 | 34億3750万 | -0.71% |
| 12/10 | 1,266 | 1,266 | 1,260 | 1,260 | -0.47% | 200 | 34億6500万 | +0.08% |
| 12/09 | 1,262 | 1,266 | 1,253 | 1,266 | +0.32% | 500 | 34億8150万 | +0.56% |
| 12/06 | 1,262 | 1,262 | 1,262 | 1,262 | +0.16% | 700 | 34億7050万 | +0.16% |
| 12/05 | 1,254 | 1,260 | 1,254 | 1,260 | +0.72% | 200 | 34億6500万 | 0% |
| 12/04 | 1,252 | 1,253 | 1,251 | 1,251 | -0.08% | 1,100 | 34億4025万 | -0.71% |
| 12/03 | 1,265 | 1,265 | 1,250 | 1,252 | -0.48% | 3,300 | 34億4300万 | -0.71% |
| 12/02 | 1,278 | 1,278 | 1,258 | 1,258 | -0.79% | 1,200 | 34億5950万 | -0.32% |
| 11/29 | 1,268 | 1,268 | 1,268 | 1,268 | +0.56% | 200 | 34億8700万 | +0.4% |
| 11/28 | 1,261 | 1,261 | 1,261 | 1,261 | -0.16% | 100 | 34億6775万 | -0.24% |
| 11/27 | 1,263 | 1,263 | 1,263 | 1,263 | 0% | 100 | 34億7325万 | -0.55% |
| 11/26 | 1,263 | 1,263 | 1,263 | 1,263 | 0% | 100 | 34億7325万 | -0.55% |
| 11/25 | 1,263 | 1,263 | 1,263 | 1,263 | 0% | 200 | 34億7325万 | -0.47% |
| 11/22 | 1,263 | 1,263 | 1,263 | 1,263 | +0.96% | 100 | 34億7325万 | -0.39% |
| 11/21 | 1,251 | 1,251 | 1,251 | 1,251 | 0% | 100 | 34億4025万 | -1.18% |
| 11/20 | 1,260 | 1,268 | 1,251 | 1,251 | -0.71% | 500 | 34億4025万 | -1.11% |
| 11/19 | 1,268 | 1,268 | 1,260 | 1,260 | -0.63% | 1,100 | 34億6500万 | -0.32% |
| 11/18 | 1,263 | 1,268 | 1,250 | 1,268 | +0.4% | 3,200 | 34億8700万 | +0.4% |
| 11/15 | 1,256 | 1,263 | 1,256 | 1,263 | +0.56% | 300 | 34億7325万 | +0.16% |
| 11/14 | 1,258 | 1,258 | 1,252 | 1,256 | -0.79% | 400 | 34億5400万 | -0.24% |
| 11/13 | 1,252 | 1,268 | 1,252 | 1,266 | +1.12% | 1,500 | 34億8150万 | +0.64% |
| 11/12 | 1,260 | 1,260 | 1,252 | 1,252 | -0.24% | 200 | 34億4300万 | -0.32% |
| 11/11 | 1,267 | 1,267 | 1,255 | 1,255 | 0% | 400 | 34億5125万 | 0% |
| 11/08 | 1,255 | 1,255 | 1,255 | 1,255 | 0% | 100 | 34億5125万 | +0.08% |
| 11/07 | 1,256 | 1,256 | 1,255 | 1,255 | 0% | 200 | 34億5125万 | 0% |
| 11/06 | 1,258 | 1,258 | 1,252 | 1,255 | -1.03% | 600 | 34億5125万 | +0.08% |
| 11/05 | 1,261 | 1,268 | 1,257 | 1,268 | -0.16% | 700 | 34億8700万 | +1.12% |
| 11/01 | 1,278 | 1,278 | 1,270 | 1,270 | 0% | 500 | 34億9250万 | +1.36% |
| 10/31 | 1,274 | 1,274 | 1,270 | 1,270 | -0.31% | 1,300 | 34億9250万 | +1.36% |
| 10/30 | 1,274 | 1,282 | 1,271 | 1,274 | 0% | 700 | 35億350万 | +1.68% |
| 10/29 | 1,274 | 1,274 | 1,274 | 1,274 | 0% | 200 | 35億350万 | +1.92% |
| 10/28 | 1,296 | 1,296 | 1,274 | 1,274 | -0.55% | 400 | 35億350万 | +2.08% |
| 10/25 | 1,297 | 1,309 | 1,279 | 1,281 | -0.62% | 2,100 | 35億2275万 | +2.89% |
| 10/24 | 1,270 | 1,300 | 1,270 | 1,289 | -9.23% | 9,000 | 35億4475万 | +3.62% |
| 10/23 | 17:00 2020年3月期第2四半期業績予想と実績との差異及び通期業績予想の修正に関するお知らせ |
| 10/23 | 17:00 2020年3月期第2四半期決算短信[日本基準](連結) |
| 10/23 | 1,260 | 1,429 | 1,260 | 1,420 | +13.69% | 6,100 | 39億500万 | +14.52% |
| 10/21 | 1,249 | 1,250 | 1,237 | 1,249 | +0.97% | 1,200 | 34億3475万 | +1.46% |
| 10/18 | 1,234 | 1,237 | 1,229 | 1,237 | -0.56% | 700 | 34億175万 | +0.57% |
| 10/17 | 1,220 | 1,244 | 1,220 | 1,244 | +1.97% | 300 | 34億2100万 | +1.22% |
| 10/16 | 1,220 | 1,220 | 1,220 | 1,220 | 0% | 500 | 33億5500万 | -0.73% |
| 10/10 | 1,220 | 1,220 | 1,220 | 1,220 | -0.33% | 300 | 33億5500万 | -0.81% |
| 10/09 | 1,226 | 1,226 | 1,224 | 1,224 | -0.16% | 200 | 33億6600万 | -0.57% |
| 10/08 | 1,230 | 1,230 | 1,226 | 1,226 | -0.33% | 400 | 33億7150万 | -0.33% |
| 10/07 | 1,220 | 1,230 | 1,220 | 1,230 | +0.82% | 6,600 | 33億8250万 | +0.08% |
| 10/04 | 1,220 | 1,220 | 1,220 | 1,220 | 0% | 100 | 33億5500万 | -0.65% |
| 10/03 | 1,220 | 1,220 | 1,220 | 1,220 | 0% | 100 | 33億5500万 | -0.65% |
| 10/02 | 1,250 | 1,250 | 1,220 | 1,220 | -0.81% | 200 | 33億5500万 | -0.57% |
| 10/01 | 1,230 | 1,230 | 1,230 | 1,230 | 0% | 200 | 33億8250万 | +0.24% |
| 09/30 | 1,256 | 1,256 | 1,230 | 1,230 | -3.07% | 300 | 33億8250万 | +0.24% |
| 09/27 | 1,269 | 1,269 | 1,269 | 1,269 | +2.75% | 100 | 34億8975万 | +3.51% |
