| 2026 |
| 03/05 | (IR情報)16:00 当社株式の上場廃止のお知らせ |
| 03/05 | 1,373 | 1,374 | 1,373 | 1,374 | +0.07% | 1,100 | 148億9369万 | +0.29% |
| 03/04 | 1,372 | 1,373 | 1,372 | 1,373 | +0.07% | 1,500 | 148億8285万 | +0.22% |
| 03/03 | 1,373 | 1,373 | 1,372 | 1,372 | +0.07% | 3,400 | 148億7201万 | +0.22% |
| 03/02 | 1,371 | 1,371 | 1,371 | 1,371 | +0.07% | 1,400 | 148億6117万 | +0.15% |
| 02/27 | 1,371 | 1,371 | 1,370 | 1,370 | -0.07% | 12,100 | 148億5033万 | +0.07% |
| 02/26 | 1,371 | 1,371 | 1,371 | 1,371 | -0.07% | 5,300 | 148億6117万 | +0.15% |
| 02/25 | 1,372 | 1,372 | 1,372 | 1,372 | +0.22% | 2,500 | 148億7201万 | +0.22% |
| 02/24 | 1,370 | 1,372 | 1,369 | 1,369 | -0.15% | 5,000 | 148億3949万 | 0% |
| 02/20 | 1,371 | 1,371 | 1,371 | 1,371 | +0.07% | 500 | 148億6117万 | +0.15% |
| 02/19 | 1,370 | 1,370 | 1,369 | 1,370 | -0.07% | 14,200 | 148億5033万 | +0.15% |
| 02/18 | 1,370 | 1,371 | 1,370 | 1,371 | +0.07% | 1,100 | 148億6117万 | +0.22% |
| 02/17 | 1,369 | 1,370 | 1,369 | 1,370 | +0.07% | 2,600 | 148億5033万 | +0.15% |
| 02/16 | 1,369 | 1,369 | 1,369 | 1,369 | -0.07% | 3,700 | 148億3949万 | +0.07% |
| 02/13 | 1,369 | 1,370 | 1,369 | 1,370 | +0.15% | 6,700 | 148億5033万 | +0.15% |
| 02/12 | 1,369 | 1,369 | 1,368 | 1,368 | -0.07% | 7,900 | 148億2865万 | 0% |
| 02/10 | (IR情報)16:00 株式併合並びに単元株式数の定めの廃止及び定款の一部変更に関する承認決議に関するお知らせ |
| 02/10 | 1,370 | 1,370 | 1,369 | 1,369 | 0% | 800 | 148億3949万 | +0.07% |
| 02/09 | 1,370 | 1,370 | 1,369 | 1,369 | 0% | 700 | 148億3949万 | +0.07% |
| 02/06 | 1,369 | 1,369 | 1,369 | 1,369 | 0% | 300 | 148億3949万 | +0.07% |
| 02/05 | 1,369 | 1,369 | 1,369 | 1,369 | 0% | 200 | 148億3949万 | +0.15% |
| 02/04 | 1,369 | 1,369 | 1,369 | 1,369 | 0% | 2,900 | 148億3949万 | +0.15% |
| 02/03 | 1,369 | 1,370 | 1,369 | 1,369 | +0.07% | 2,200 | 148億3949万 | +0.15% |
| 02/02 | 1,368 | 1,368 | 1,368 | 1,368 | 0% | 7,600 | 148億2865万 | +0.07% |
| 01/30 | (IR情報)16:00 2026年3月期第3四半期決算短信〔日本基準〕(非連結) |
| 01/30 | 1,368 | 1,368 | 1,368 | 1,368 | +0.07% | 1,500 | 148億2865万 | +0.07% |
| 01/29 | 1,368 | 1,369 | 1,367 | 1,367 | -0.07% | 5,700 | 148億1781万 | 0% |
| 01/28 | 1,368 | 1,368 | 1,368 | 1,368 | 0% | 500 | 148億2865万 | +0.07% |
| 01/27 | 1,367 | 1,368 | 1,367 | 1,368 | +0.07% | 15,900 | 148億2865万 | +0.07% |
| 01/26 | 1,367 | 1,367 | 1,367 | 1,367 | 0% | 600 | 148億1781万 | 0% |
| 01/23 | 1,367 | 1,367 | 1,367 | 1,367 | -0.07% | 1,600 | 148億1781万 | 0% |
| 01/22 | 1,368 | 1,368 | 1,368 | 1,368 | 0% | 100 | 148億2865万 | +0.07% |
| 01/21 | 1,368 | 1,368 | 1,368 | 1,368 | 0% | 4,300 | 148億2865万 | 0% |
| 01/20 | 1,368 | 1,368 | 1,368 | 1,368 | +0.07% | 1,800 | 148億2865万 | 0% |
| 01/19 | 1,367 | 1,367 | 1,367 | 1,367 | 0% | 2,400 | 148億1781万 | -0.07% |
| 01/16 | 1,367 | 1,367 | 1,367 | 1,367 | -0.07% | 2,400 | 148億1781万 | -0.15% |
| 01/15 | 1,367 | 1,368 | 1,367 | 1,368 | +0.07% | 400 | 148億2865万 | -0.07% |
| 01/14 | 1,367 | 1,367 | 1,367 | 1,367 | 0% | 13,300 | 148億1781万 | -0.22% |
| 01/13 | 1,367 | 1,367 | 1,366 | 1,367 | +0.07% | 7,000 | 148億1781万 | -0.22% |
| 01/09 | (IR情報)16:00 株式併合並びに単元株式数の定めの廃止及び定款の一部変更に関する臨時株主総会開催のお知らせ |
| 01/09 | (IR情報)16:00 自己株式の消却に関するお知らせ |
| 01/09 | 1,366 | 1,366 | 1,366 | 1,366 | -0.07% | 1,600 | 148億697万 | -0.29% |
| 01/08 | 1,366 | 1,367 | 1,365 | 1,367 | +0.07% | 20,700 | 148億1781万 | -0.29% |
| 01/07 | 1,366 | 1,366 | 1,366 | 1,366 | -0.07% | 100 | 148億697万 | -0.36% |
| 01/06 | 1,366 | 1,367 | 1,366 | 1,367 | +0.07% | 800 | 148億1781万 | -0.36% |
| 01/05 | 1,366 | 1,367 | 1,366 | 1,366 | -0.07% | 30,100 | 148億697万 | -0.44% |
| 2025 |
| 12/30 | 1,367 | 1,367 | 1,366 | 1,367 | 0% | 6,000 | 148億1781万 | -0.36% |
| 12/29 | 1,367 | 1,367 | 1,367 | 1,367 | 0% | 3,300 | 148億1781万 | -0.44% |
| 12/26 | 1,367 | 1,367 | 1,367 | 1,367 | -0.07% | 21,000 | 148億1781万 | -0.44% |
| 12/25 | 1,368 | 1,368 | 1,368 | 1,368 | +0.07% | 19,900 | 148億2865万 | -0.44% |
| 12/24 | 1,368 | 1,368 | 1,367 | 1,367 | 0% | 13,500 | 148億1781万 | -0.51% |
| 12/23 | (5%ルール)中銀リース(0%)中国銀行(0%) |
| 12/23 | (5%ルール)ヤスハラケミカル取引先持株会理事長田中正治(0%) |
| 12/23 | 1,368 | 1,368 | 1,367 | 1,367 | 0% | 5,600 | 148億1781万 | -0.51% |
| 12/22 | 1,367 | 1,368 | 1,367 | 1,367 | +0.07% | 8,700 | 148億1781万 | -0.58% |
| 12/19 | 1,367 | 1,367 | 1,366 | 1,366 | -0.07% | 15,600 | 148億697万 | -0.65% |
| 12/18 | (5%ルール)沖津妙子(4.3%)沖津弘之(1.35%)安原禎二(10.95%)YAHO(48.06%)原田桂子(1.28%)ワイエス興産(11.41%) |
| 12/18 | 1,368 | 1,368 | 1,367 | 1,367 | 0% | 34,700 | 148億1781万 | -0.58% |
| 12/17 | (5%ルール)YAHO(48.06%)原田桂子(1.28%)沖津弘之(1.35%)沖津妙子(4.3%)ワイエス興産(11.41%)安原禎二(10.95%) |
| 12/17 | (IR情報)15:00 YAHO株式会社による当社株式に対する公開買付けの結果並びに親会社、主要株主である筆頭株主及び主要株主の異動に関するお知らせ |
| 12/17 | 1,367 | 1,371 | 1,365 | 1,367 | -0.07% | 32,400 | 148億1781万 | -0.65% |
| 12/16 | 1,368 | 1,368 | 1,365 | 1,368 | -0.07% | 26,300 | 148億2865万 | -0.58% |
| 12/15 | 1,370 | 1,372 | 1,368 | 1,369 | -0.65% | 18,200 | 148億3949万 | -0.58% |
| 12/12 | 1,378 | 1,379 | 1,377 | 1,378 | 0% | 32,900 | 149億3705万 | 0% |
| 12/11 | 1,378 | 1,378 | 1,377 | 1,378 | 0% | 16,000 | 149億3705万 | 0% |
| 12/10 | 1,377 | 1,378 | 1,377 | 1,378 | +0.07% | 10,300 | 149億3705万 | -0.07% |
| 12/09 | 1,377 | 1,378 | 1,377 | 1,377 | 0% | 19,100 | 149億2621万 | -0.29% |
| 12/08 | 1,377 | 1,377 | 1,377 | 1,377 | 0% | 6,500 | 149億2621万 | +0.36% |
| 12/05 | (IR情報)16:00 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 |
| 12/05 | 1,377 | 1,378 | 1,377 | 1,377 | 0% | 4,100 | 149億2621万 | +1.25% |
| 12/04 | 1,378 | 1,378 | 1,377 | 1,377 | -0.07% | 12,100 | 149億2621万 | +2.08% |
| 12/03 | 1,377 | 1,378 | 1,377 | 1,378 | +0.07% | 29,400 | 149億3705万 | +3.14% |
| 12/02 | 1,377 | 1,378 | 1,377 | 1,377 | 0% | 23,000 | 149億2621万 | +4% |
| 12/01 | 1,378 | 1,378 | 1,377 | 1,377 | 0% | 87,900 | 149億2621万 | +5.03% |
| 11/28 | 1,377 | 1,378 | 1,377 | 1,377 | 0% | 30,800 | 149億2621万 | +6% |
| 11/27 | 1,378 | 1,378 | 1,377 | 1,377 | 0% | 23,400 | 149億2621万 | +6.99% |
| 11/26 | 1,377 | 1,378 | 1,377 | 1,377 | 0% | 17,700 | 149億2621万 | +7.92% |
| 11/25 | 1,377 | 1,378 | 1,376 | 1,377 | +0.07% | 21,700 | 149億2621万 | +8.94% |
| 11/21 | (IR情報)16:00 (訂正・数値データ訂正)「2025年3月期第1四半期決算短信〔日本基準〕(非連結)」の一部訂正について |
| 11/21 | (IR情報)16:00 (訂正・数値データ訂正)「2025年3月期第3四半期決算短信〔日本基準〕(非連結)」の一部訂正について |
| 11/21 | (IR情報)16:00 (訂正・数値データ訂正)「2025年3月期決算短信〔日本基準〕(非連結)」の一部訂正について |
| 11/21 | (IR情報)16:00 過年度の有価証券報告書等の訂正報告書の提出及び過年度の決算短信等の訂正に関するお知らせ |
| 11/21 | (IR情報)16:00 (訂正・数値データ訂正)「2026年3月期第1四半期決算短信〔日本基準〕(非連結)」の一部訂正について |
| 11/21 | (IR情報)16:00 人事異動に関するお知らせ |
| 11/21 | 1,376 | 1,378 | 1,376 | 1,376 | 0% | 34,200 | 149億1537万 | +9.99% |
| 11/20 | 1,375 | 1,377 | 1,375 | 1,376 | +0.07% | 37,500 | 149億1537万 | +11.06% |
| 11/19 | 1,375 | 1,376 | 1,375 | 1,375 | 0% | 31,100 | 149億453万 | +12.15% |
| 11/18 | 1,375 | 1,376 | 1,375 | 1,375 | 0% | 44,500 | 149億453万 | +13.54% |
| 11/17 | 1,375 | 1,377 | 1,375 | 1,375 | 0% | 51,100 | 149億453万 | +14.77% |
| 11/14 | 1,377 | 1,377 | 1,374 | 1,375 | -0.36% | 59,600 | 149億453万 | +16.13% |
| 11/13 | 1,380 | 1,381 | 1,378 | 1,380 | 0% | 41,600 | 149億5873万 | +17.65% |
| 11/12 | 1,380 | 1,382 | 1,379 | 1,380 | 0% | 95,600 | 149億5873万 | +18.76% |
| 11/11 | 1,380 | 1,382 | 1,380 | 1,380 | -0.29% | 18,900 | 149億5873万 | +20% |
| 11/10 | 1,381 | 1,385 | 1,380 | 1,384 | +0.22% | 36,000 | 150億209万 | +22.15% |
| 11/07 | 1,381 | 1,385 | 1,380 | 1,381 | -0.29% | 42,800 | 149億6957万 | +23.97% |
| 11/06 | (5%ルール)槇本通夫(1.64%)マキ(3.72%) |
| 11/06 | (5%ルール)原田桂子(1.28%)沖津弘之(1.35%)沖津妙子(4.67%) |
| 11/06 | (5%ルール)安原禎二(10.95%) |
| 11/06 | (5%ルール)ワイエス興産(11.41%) |
| 11/06 | 1,390 | 1,394 | 1,381 | 1,385 | -0.72% | 90,300 | 150億1293万 | +26.6% |
| 11/05 | 1,393 | 1,428 | 1,384 | 1,395 | -3.33% | 222,300 | 151億2132万 | +29.77% |
| 11/04 | 1,443 | 1,443 | 1,443 | 1,443 | +26.25% | 66,600 | 156億4163万 | +36.52% |
| 10/31 | (IR情報)18:00 MBOの実施及び応募の推奨に関するお知らせ |
| 10/31 | (IR情報)18:00 YAHO株式会社によるヤスハラケミカル株式会社(証券コード:4957)の株式に対する公開買付けの開始に関するお知らせ |
| 10/31 | (IR情報)18:00 2026年3月期の期末配当予想の修正(無配)に関するお知らせ |
| 10/31 | (IR情報)18:00 2026年3月期第2四半期(中間期)業績予想と実績との差異に関するお知らせ |
| 10/31 | (IR情報)18:00 2026年3月期第2四半期(中間期)決算短信〔日本基準〕(非連結) |
| 10/31 | 1,090 | 1,143 | 1,090 | 1,143 | +4.77% | 15,600 | 123億8973万 | +10.22% |
| 10/30 | 1,084 | 1,091 | 1,070 | 1,091 | +0.65% | 2,700 | 118億2607万 | +6.03% |
| 10/29 | 1,083 | 1,084 | 1,064 | 1,084 | +2.26% | 3,200 | 117億5019万 | +5.96% |
| 10/28 | 1,062 | 1,067 | 1,029 | 1,060 | -1.03% | 11,300 | 114億9004万 | +4.13% |
| 10/27 | 1,059 | 1,072 | 1,059 | 1,071 | +1.13% | 5,300 | 116億927万 | +5.62% |
| 10/24 | 1,079 | 1,079 | 1,025 | 1,059 | -2.31% | 11,100 | 114億7920万 | +5.06% |
| 10/23 | 1,084 | 1,110 | 999 | 1,084 | 0% | 19,800 | 117億5019万 | +8.18% |
| 10/22 | 1,101 | 1,111 | 1,066 | 1,084 | -1.28% | 8,900 | 117億5019万 | +8.84% |
| 10/21 | 1,079 | 1,107 | 1,077 | 1,098 | +1.95% | 9,500 | 119億194万 | +11.02% |
| 10/20 | 1,052 | 1,078 | 1,052 | 1,077 | +2.57% | 3,300 | 116億7431万 | +9.67% |
| 10/17 | 1,067 | 1,067 | 1,045 | 1,050 | -1.59% | 4,100 | 113億8164万 | +7.58% |
| 10/16 | 1,045 | 1,085 | 1,020 | 1,067 | +2.11% | 10,600 | 115億6592万 | +9.89% |
| 10/15 | 1,009 | 1,048 | 1,009 | 1,045 | +2.96% | 7,900 | 113億2744万 | +8.29% |
| 10/14 | 1,024 | 1,050 | 986 | 1,015 | -2.59% | 19,800 | 110億225万 | +5.95% |
| 10/10 | 1,010 | 1,059 | 1,010 | 1,042 | +1.66% | 13,800 | 112億9492万 | +9.34% |
| 10/09 | 1,097 | 1,100 | 1,017 | 1,025 | -6.56% | 41,000 | 111億1065万 | +8.24% |
| 10/08 | 1,080 | 1,099 | 1,079 | 1,097 | -0.63% | 14,900 | 118億9111万 | +16.45% |
| 10/07 | 1,063 | 1,240 | 1,055 | 1,104 | +1.01% | 91,900 | 119億6698万 | +18.33% |
| 10/06 | 940 | 1,093 | 940 | 1,093 | +15.91% | 45,200 | 118億4775万 | +18.29% |