| 2022 |
| 12/12 | （IR情報）15:30 当社株式の上場廃止に関するお知らせ |
| 12/12 | 3,140 | 3,140 | 3,140 | 3,140 | 0% | 2,300 | 390億7259万 | -0.1% |
| 12/09 | 3,140 | 3,140 | 3,140 | 3,140 | 0% | 14,100 | 390億7259万 | -0.1% |
| 12/08 | 3,150 | 3,150 | 3,140 | 3,140 | -0.16% | 500 | 390億7259万 | -0.1% |
| 12/07 | 3,140 | 3,145 | 3,140 | 3,145 | 0% | 4,700 | 391億3480万 | +0.06% |
| 12/06 | 3,140 | 3,145 | 3,140 | 3,145 | 0% | 1,800 | 391億3480万 | +0.03% |
| 12/05 | 3,140 | 3,150 | 3,140 | 3,145 | +0.16% | 1,800 | 391億3480万 | +0.03% |
| 12/02 | （IR情報）15:00 当社のISO 9001認証範囲の一部取消しと一時停止の継続について |
| 12/02 | 3,140 | 3,145 | 3,140 | 3,140 | 0% | 800 | 390億7259万 | -0.13% |
| 12/01 | 3,140 | 3,150 | 3,140 | 3,140 | 0% | 4,500 | 390億7259万 | -0.13% |
| 11/30 | （5%ルール）出光興産（99.97%） |
| 11/30 | 3,140 | 3,150 | 3,140 | 3,140 | -0.16% | 4,500 | 390億7259万 | -0.13% |
| 11/29 | 3,140 | 3,145 | 3,140 | 3,145 | +0.16% | 4,100 | 391億3480万 | +0.03% |
| 11/28 | 3,140 | 3,145 | 3,140 | 3,140 | 0% | 2,200 | 390億7259万 | -0.13% |
| 11/25 | 3,140 | 3,150 | 3,140 | 3,140 | 0% | 7,300 | 390億7259万 | -0.13% |
| 11/24 | （IR情報）13:00 代表取締役及び役員の異動に関するお知らせ |
| 11/24 | （IR情報）13:00 出光興産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 |
| 11/24 | 3,140 | 3,150 | 3,140 | 3,140 | 0% | 4,400 | 390億7259万 | -0.13% |
| 11/22 | 3,145 | 3,145 | 3,140 | 3,140 | -0.16% | 400 | 390億7259万 | -0.13% |
| 11/21 | 3,145 | 3,145 | 3,145 | 3,145 | 0% | 400 | 391億3480万 | +0.03% |
| 11/18 | （5%ルール）コーンウォール・キャピタル・マネジメント・エルピ…（0%） |
| 11/18 | 3,140 | 3,145 | 3,140 | 3,145 | 0% | 500 | 391億3480万 | +0.03% |
| 11/17 | 3,145 | 3,145 | 3,145 | 3,145 | 0% | 100 | 391億3480万 | +0.03% |
| 11/16 | （5%ルール）出光興産（98%） |
| 11/16 | （IR情報）11:00 臨時株主総会開催の中止及び基準日の取消しに関するお知らせ |
| 11/16 | （IR情報）11:00 当社親会社である出光興産株式会社による当社株式に対する公開買付けの結果及び主要株主の異動に関するお知らせ |
| 11/16 | 3,140 | 3,145 | 3,140 | 3,145 | +0.16% | 2,200 | 391億3480万 | +0.03% |
| 11/15 | （IR情報）15:30 役員報酬の一部自主返納に関するお知らせ |
| 11/15 | 3,140 | 3,145 | 3,140 | 3,140 | 0% | 4,900 | 390億7259万 | -0.1% |
| 11/14 | 3,145 | 3,145 | 3,140 | 3,140 | -0.16% | 5,500 | 390億7259万 | -0.13% |
| 11/11 | 3,145 | 3,150 | 3,145 | 3,145 | 0% | 16,300 | 391億3480万 | +0.03% |
| 11/10 | 3,145 | 3,145 | 3,145 | 3,145 | 0% | 11,100 | 391億3480万 | +0.06% |
| 11/09 | （IR情報）15:30 臨時株主総会招集のための基準日設定に関するお知らせ |
| 11/09 | 3,145 | 3,145 | 3,145 | 3,145 | 0% | 7,900 | 391億3480万 | +0.06% |
| 11/08 | 3,145 | 3,150 | 3,145 | 3,145 | 0% | 5,200 | 391億3480万 | +0.64% |
| 11/07 | 3,150 | 3,150 | 3,145 | 3,145 | 0% | 3,800 | 391億3480万 | +1.88% |
| 11/04 | 3,145 | 3,150 | 3,145 | 3,145 | 0% | 10,400 | 391億3480万 | +3.05% |
| 11/02 | 3,145 | 3,145 | 3,145 | 3,145 | -0.16% | 2,600 | 391億3480万 | +4.21% |
| 11/01 | 3,145 | 3,150 | 3,145 | 3,150 | 0% | 17,700 | 391億9702万 | +5.56% |
| 10/31 | （IR情報）15:30 2023年3月期第2四半期決算短信〔日本基準〕(連結) |
| 10/31 | 3,145 | 3,150 | 3,145 | 3,150 | +0.16% | 3,900 | 391億9702万 | +6.56% |
| 10/28 | 3,145 | 3,145 | 3,145 | 3,145 | 0% | 1,900 | 391億3480万 | +7.48% |
| 10/27 | 3,145 | 3,150 | 3,140 | 3,145 | 0% | 132,200 | 391億3480万 | +8.49% |
| 10/26 | 3,145 | 3,145 | 3,140 | 3,145 | +0.16% | 6,600 | 391億3480万 | +9.51% |
| 10/25 | 3,145 | 3,145 | 3,140 | 3,140 | -0.16% | 53,400 | 390億7259万 | +10.56% |
| 10/24 | 3,140 | 3,145 | 3,140 | 3,145 | 0% | 5,100 | 391億3480万 | +12.12% |
| 10/21 | 3,145 | 3,145 | 3,140 | 3,145 | +0.16% | 13,000 | 391億3480万 | +13.58% |
| 10/20 | 3,140 | 3,145 | 3,140 | 3,140 | 0% | 16,300 | 390億7259万 | +14.93% |
| 10/19 | 3,145 | 3,145 | 3,140 | 3,140 | -0.16% | 8,900 | 390億7259万 | +16.47% |
| 10/18 | 3,145 | 3,145 | 3,140 | 3,145 | +0.16% | 12,600 | 391億3480万 | +18.19% |
| 10/17 | 3,145 | 3,145 | 3,140 | 3,140 | 0% | 13,500 | 390億7259万 | +19.71% |
| 10/14 | 3,145 | 3,145 | 3,140 | 3,140 | 0% | 20,400 | 390億7259万 | +21.47% |
| 10/13 | 3,145 | 3,145 | 3,140 | 3,140 | 0% | 11,900 | 390億7259万 | +23.28% |
| 10/12 | 3,145 | 3,145 | 3,140 | 3,140 | 0% | 12,900 | 390億7259万 | +25.2% |
| 10/11 | 3,145 | 3,145 | 3,140 | 3,140 | -0.16% | 13,800 | 390億7259万 | +27.18% |
| 10/07 | 3,140 | 3,145 | 3,140 | 3,145 | +0.16% | 27,500 | 391億3480万 | +29.21% |
| 10/06 | （5%ルール）コーンウォール・キャピタル・マネジメント・エルピ…（31.49%） |
| 10/06 | 3,145 | 3,145 | 3,140 | 3,140 | 0% | 14,600 | 390億7259万 | +30.89% |
| 10/05 | 3,145 | 3,145 | 3,140 | 3,140 | 0% | 44,900 | 390億7259万 | +32.88% |
| 10/04 | 3,140 | 3,145 | 3,140 | 3,140 | +16.47% | 203,600 | 390億7259万 | +35.05% |
| 10/03 | 2,696 | 2,696 | 2,696 | 2,696 | +22.77% | 800 | 335億4767万 | +17.94% |
| 09/30 | （IR情報）15:00 当社親会社である出光興産株式会社による当社株式に対する公開買付けに係る賛同の意見表明及び応募推奨に関するお知らせ |
| 09/30 | （IR情報）15:00 「新市場区分の上場維持基準の適合に向けた計画書」の撤回について |
| 09/30 | （IR情報）15:00 2023年3月期配当予想の修正(無配)に関するお知らせ |
| 09/30 | （IR情報）15:00 当社におけるISO9001認証の一時停止に関する件 |
| 09/30 | 2,255 | 2,255 | 2,165 | 2,196 | -3.39% | 12,300 | 273億2592万 | -3.05% |
| 09/29 | 2,323 | 2,365 | 2,249 | 2,273 | -0.48% | 12,300 | 282億8407万 | +0.4% |
| 09/28 | 2,295 | 2,320 | 2,214 | 2,284 | -0.7% | 5,900 | 284億2095万 | +1.11% |
| 09/27 | 2,388 | 2,388 | 2,300 | 2,300 | -5.66% | 12,000 | 286億2005万 | +2% |
| 09/26 | 2,422 | 2,438 | 2,327 | 2,438 | +0.79% | 3,600 | 303億3725万 | +8.31% |
| 09/22 | （IR情報）15:00 当社における製品試験の不適切行為に関する調査結果および今後の対応について |
| 09/22 | 2,456 | 2,456 | 2,356 | 2,419 | -1.51% | 9,000 | 301億82万 | +7.89% |
| 09/21 | 2,474 | 2,474 | 2,421 | 2,456 | -1.05% | 16,700 | 305億6123万 | +9.89% |
| 09/20 | 2,391 | 2,482 | 2,357 | 2,482 | +5.84% | 36,400 | 308億8476万 | +11.35% |
| 09/16 | 2,262 | 2,364 | 2,164 | 2,345 | +3.67% | 182,300 | 291億8000万 | +5.58% |
| 09/15 | 2,244 | 2,286 | 2,226 | 2,262 | +1.16% | 16,300 | 281億4719万 | +1.94% |
| 09/14 | 2,225 | 2,248 | 2,207 | 2,236 | +0.49% | 4,700 | 278億2366万 | +0.63% |
| 09/13 | 2,250 | 2,289 | 2,203 | 2,225 | -1.11% | 13,300 | 276億8678万 | -0.13% |
| 09/12 | 2,269 | 2,269 | 2,213 | 2,250 | +0.4% | 16,400 | 279億9787万 | +0.63% |
| 09/09 | 2,200 | 2,281 | 2,198 | 2,241 | +2.1% | 10,200 | 278億8588万 | -0.04% |
| 09/08 | 2,199 | 2,220 | 2,169 | 2,195 | -0.18% | 12,000 | 273億1348万 | -2.36% |
| 09/07 | 2,197 | 2,242 | 2,165 | 2,199 | +0.09% | 7,900 | 273億6325万 | -2.57% |
| 09/06 | 2,168 | 2,309 | 2,151 | 2,197 | +1.48% | 73,300 | 273億3836万 | -3.05% |
| 09/05 | 2,163 | 2,227 | 2,163 | 2,165 | +0.05% | 8,800 | 269億4017万 | -4.92% |
| 09/02 | 2,246 | 2,247 | 2,164 | 2,164 | -4.25% | 16,800 | 269億2773万 | -5.5% |
| 09/01 | 2,284 | 2,284 | 2,242 | 2,260 | -0.7% | 19,300 | 281億2231万 | -1.74% |
| 08/31 | 2,240 | 2,300 | 2,240 | 2,276 | +1.83% | 7,000 | 283億2140万 | -1.34% |
| 08/30 | 2,200 | 2,271 | 2,200 | 2,235 | +2.05% | 6,700 | 278億1122万 | -3.5% |
| 08/29 | 2,201 | 2,202 | 2,169 | 2,190 | +0.69% | 29,500 | 272億5126万 | -5.81% |
| 08/26 | 2,159 | 2,187 | 2,159 | 2,175 | +0.83% | 6,400 | 270億6461万 | -6.93% |
| 08/25 | 2,175 | 2,196 | 2,157 | 2,157 | -0.69% | 5,500 | 268億4062万 | -8.21% |
| 08/24 | 2,183 | 2,193 | 2,154 | 2,172 | +0.56% | 8,000 | 270億2728万 | -8.08% |
| 08/23 | 2,160 | 2,161 | 2,152 | 2,160 | -0.96% | 21,600 | 268億7796万 | -9.05% |
| 08/22 | 2,153 | 2,201 | 2,153 | 2,181 | -0.18% | 22,000 | 271億3927万 | -8.63% |
| 08/19 | 2,237 | 2,237 | 2,180 | 2,185 | -1.31% | 22,200 | 271億8904万 | -8.92% |
| 08/18 | 2,281 | 2,281 | 2,214 | 2,214 | -1.86% | 12,400 | 275億4990万 | -8.17% |
| 08/17 | 2,283 | 2,291 | 2,254 | 2,256 | -1.57% | 5,800 | 280億7253万 | -6.85% |
| 08/16 | 2,300 | 2,300 | 2,274 | 2,292 | +0.31% | 13,800 | 285億2050万 | -5.76% |
| 08/15 | 2,335 | 2,348 | 2,285 | 2,285 | -0.48% | 5,000 | 284億3339万 | -6.35% |
| 08/12 | 2,350 | 2,351 | 2,150 | 2,296 | -2.3% | 13,300 | 285億7027万 | -6.21% |
| 08/10 | 2,352 | 2,376 | 2,350 | 2,350 | -1.76% | 11,800 | 292億4222万 | -4.28% |
| 08/09 | 2,435 | 2,436 | 2,391 | 2,392 | -0.37% | 1,100 | 297億6485万 | -2.76% |
| 08/08 | 2,410 | 2,416 | 2,384 | 2,401 | -0.37% | 1,700 | 298億7684万 | -2.52% |
| 08/05 | 2,375 | 2,440 | 2,375 | 2,410 | +0.42% | 2,700 | 299億8883万 | -2.27% |
| 08/04 | 2,383 | 2,417 | 2,363 | 2,400 | -0.58% | 8,600 | 298億6440万 | -2.76% |
| 08/03 | 2,420 | 2,469 | 2,414 | 2,414 | -0.49% | 1,200 | 300億3860万 | -2.27% |
| 08/02 | 2,454 | 2,480 | 2,426 | 2,426 | -2.18% | 1,800 | 301億8793万 | -1.86% |
| 08/01 | 2,480 | 2,480 | 2,458 | 2,480 | +0.08% | 5,800 | 308億5988万 | +0.2% |
| 07/29 | （IR情報）15:30 2023年3月期第2四半期累計期間および通期連結業績予想の修正に関するお知らせ |
| 07/29 | （IR情報）15:30 2023年3月期第1四半期決算短信〔日本基準〕(連結) |
| 07/29 | 2,400 | 2,493 | 2,400 | 2,478 | +2.95% | 6,200 | 308億3499万 | +0.16% |
| 07/28 | 2,437 | 2,459 | 2,407 | 2,407 | -1.76% | 6,100 | 299億5150万 | -2.63% |
| 07/27 | 2,458 | 2,496 | 2,450 | 2,450 | -2% | 4,600 | 304億8657万 | -0.93% |
| 07/26 | 2,484 | 2,502 | 2,461 | 2,500 | +2.21% | 18,300 | 311億875万 | +1.09% |
| 07/25 | 2,500 | 2,500 | 2,424 | 2,446 | -2.16% | 5,500 | 304億3680万 | -1.01% |
| 07/22 | 2,500 | 2,500 | 2,471 | 2,500 | -0.04% | 17,100 | 311億875万 | +1.17% |
| 07/21 | 2,460 | 2,523 | 2,460 | 2,501 | +1.05% | 46,800 | 311億2119万 | +1.3% |
| 07/20 | 2,467 | 2,481 | 2,461 | 2,475 | -0.2% | 14,200 | 307億9766万 | +0.2% |
| 07/19 | 2,491 | 2,491 | 2,480 | 2,480 | +0.61% | 200 | 308億5988万 | +0.4% |
| 07/15 | 2,460 | 2,475 | 2,460 | 2,465 | +0.2% | 1,000 | 306億7322万 | -0.24% |
