| 2026 |
| 03/09 | 4,450 | 4,555 | 4,310 | 4,530 | -6.11% | 459,000 | 1177億8000万 | +11.08% |
| 03/06 | 4,800 | 4,990 | 4,650 | 4,825 | -0.82% | 420,000 | 1254億5000万 | +19.88% |
| 03/05 | 4,765 | 5,000 | 4,690 | 4,865 | +10.19% | 715,200 | 1264億9000万 | +22.76% |
| 03/04 | 4,450 | 4,780 | 4,330 | 4,415 | -7.25% | 702,600 | 1147億9000万 | +13.32% |
| 03/03 | 4,635 | 5,060 | 4,570 | 4,760 | +9.3% | 980,500 | 1237億6000万 | +23.86% |
| 03/02 | 4,250 | 4,455 | 4,225 | 4,355 | -0.11% | 160,600 | 1132億3000万 | +15.33% |
| 02/27 | 4,250 | 4,385 | 4,210 | 4,360 | +0.23% | 196,400 | 1133億6000万 | +17.05% |
| 02/26 | 4,450 | 4,455 | 4,275 | 4,350 | -1.14% | 250,400 | 1131億 | +18.46% |
| 02/25 | 4,300 | 4,535 | 4,290 | 4,400 | +2.68% | 296,300 | 1144億 | +21.45% |
| 02/24 | 4,275 | 4,340 | 4,155 | 4,285 | +0.23% | 238,100 | 1114億1000万 | +19.86% |
| 02/20 | (5%ルール)石井太(42.6%)アイエフマネジメント(19.03%) |
| 02/20 | 4,200 | 4,375 | 4,180 | 4,275 | +1.18% | 220,300 | 1111億5000万 | +21.17% |
| 02/19 | 4,245 | 4,285 | 4,080 | 4,225 | +1.2% | 237,000 | 1098億5000万 | +21.41% |
| 02/18 | 4,435 | 4,440 | 4,135 | 4,175 | -4.46% | 402,600 | 1085億5000万 | +21.65% |
| 02/17 | 4,325 | 4,425 | 4,255 | 4,370 | +0.92% | 363,100 | 1136億2000万 | +29.18% |
| 02/16 | (IR情報)15:30 当社の流通株式比率向上を目的とした大株主による当社株式の処分に関するお知らせ |
| 02/16 | 4,245 | 4,430 | 4,100 | 4,330 | +9.21% | 639,700 | 1125億8000万 | +30.15% |
| 02/13 | 3,850 | 4,220 | 3,695 | 3,965 | +1.67% | 1,118,300 | 1030億9000万 | +21.14% |
| 02/12 | (IR情報)15:30 東京証券取引所プライム市場への株式上場準備の開始について |
| 02/12 | (IR情報)15:30 配当予想の修正(増配)に関するお知らせ |
| 02/12 | (IR情報)15:30 個別決算における特別損失の計上に関するお知らせ |
| 02/12 | (IR情報)15:30 インベスターズガイド2025年12月期 |
| 02/12 | (IR情報)15:30 2025年12月期決算説明資料 |
| 02/12 | (IR情報)15:30 2025年12月期連結業績の概要 |
| 02/12 | (IR情報)15:30 2025年12月期決算短信〔日本基準〕(連結) |
| 02/12 | 3,775 | 3,910 | 3,770 | 3,900 | +4.42% | 549,000 | 1014億 | +20.56% |
| 02/10 | 3,610 | 3,740 | 3,585 | 3,735 | +4.33% | 230,900 | 971億1000万 | +16.65% |
| 02/09 | 3,540 | 3,680 | 3,445 | 3,580 | +3.77% | 315,100 | 930億8000万 | +12.72% |
| 02/09 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 121,227株(0.46%)-0.12%義務消失 |
| 02/06 | 3,475 | 3,510 | 3,400 | 3,450 | -0.58% | 138,700 | 897億 | +9.28% |
| 02/05 | 3,390 | 3,470 | 3,335 | 3,470 | +0.29% | 171,300 | 902億2000万 | +10.4% |
| 02/05 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 153,327株(0.58%)-0.08% |
| 02/04 | 3,445 | 3,490 | 3,390 | 3,460 | +0.44% | 147,100 | 899億6000万 | +10.65% |
| 02/04 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 171,927株(0.66%)-0.12% |
| 02/03 | 3,280 | 3,480 | 3,270 | 3,445 | +6.99% | 300,200 | 895億7000万 | +10.74% |
| 02/02 | 3,230 | 3,355 | 3,220 | 3,220 | +0.31% | 228,600 | 837億2000万 | +3.94% |
| 01/30 | 3,210 | 3,240 | 3,165 | 3,210 | 0% | 172,500 | 834億6000万 | +3.88% |
| 01/29 | 3,310 | 3,315 | 3,170 | 3,210 | -1.83% | 224,200 | 834億6000万 | +4.22% |
| 01/28 | 3,230 | 3,310 | 3,225 | 3,270 | +2.67% | 417,300 | 850億2000万 | +6.58% |
| 01/28 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 203,927株(0.78%)-0.03% |
| 01/27 | 3,120 | 3,230 | 3,085 | 3,185 | +3.07% | 178,500 | 828億1000万 | +4.36% |
| 01/26 | 3,150 | 3,175 | 3,065 | 3,090 | +0.32% | 199,900 | 803億4000万 | +1.68% |
| 01/23 | 3,090 | 3,130 | 3,050 | 3,080 | +0.16% | 229,200 | 800億8000万 | +1.65% |
| 01/23 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 211,827株(0.81%)+0.08% |
| 01/22 | 3,070 | 3,100 | 3,015 | 3,075 | +0.65% | 115,100 | 799億5000万 | +1.65% |
| 01/21 | 2,991 | 3,110 | 2,945 | 3,055 | -1.61% | 226,000 | 794億3000万 | +1.23% |
| 01/20 | 3,220 | 3,255 | 3,105 | 3,105 | -3.27% | 248,900 | 807億3000万 | +3.02% |
| 01/19 | 3,170 | 3,235 | 3,105 | 3,210 | +3.05% | 369,600 | 834億6000万 | +6.57% |
| 01/19 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 191,927株(0.73%)-0.08% |
| 01/16 | 3,110 | 3,145 | 3,095 | 3,115 | +1.14% | 143,900 | 809億9000万 | +3.32% |
| 01/15 | 3,015 | 3,080 | 3,010 | 3,080 | +2.16% | 110,800 | 800億8000万 | +1.89% |
| 01/14 | 2,987 | 3,070 | 2,987 | 3,015 | +2.2% | 182,100 | 783億9000万 | -0.66% |
| 01/14 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 211,027株(0.81%)+0.11% |
| 01/13 | 2,980 | 3,005 | 2,912 | 2,950 | -0.44% | 235,500 | 767億 | -3.02% |
| 01/13 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 182,727株(0.7%)+0.09% |
| 01/09 | 2,971 | 3,015 | 2,953 | 2,963 | -0.57% | 109,300 | 770億3800万 | -2.98% |
| 01/09 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 160,827株(0.61%)+0.02% |
| 01/08 | 3,010 | 3,050 | 2,972 | 2,980 | -1.16% | 123,700 | 774億8000万 | -2.77% |
| 01/08 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 155,427株(0.59%)-0.08% |
| 01/07 | 3,075 | 3,080 | 3,010 | 3,015 | -1.95% | 125,100 | 783億9000万 | -2.05% |
| 01/06 | 3,170 | 3,195 | 3,030 | 3,075 | -0.81% | 189,000 | 799億5000万 | -0.52% |
| 01/05 | 3,130 | 3,155 | 3,060 | 3,100 | +0.49% | 231,800 | 806億 | +0.03% |
| 2025 |
| 12/30 | 3,160 | 3,185 | 3,085 | 3,085 | -0.8% | 104,900 | 802億1000万 | -0.64% |
| 12/29 | 3,075 | 3,135 | 3,070 | 3,110 | +1.47% | 142,400 | 808億6000万 | +0.03% |
| 12/26 | (IR情報)15:30 組織変更並びに重要な使用人等の異動に関するお知らせ |
| 12/26 | 3,060 | 3,085 | 3,045 | 3,065 | +0.16% | 85,400 | 796億9000万 | -1.54% |
| 12/26 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 175,639株(0.67%)-0.05% |
| 12/25 | 3,100 | 3,150 | 3,050 | 3,060 | -2.24% | 134,600 | 795億6000万 | -2.14% |
| 12/25 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 188,139株(0.72%)+0.04% |
| 12/24 | 3,030 | 3,160 | 3,025 | 3,130 | +3.64% | 304,400 | 813億8000万 | -0.06% |
| 12/24 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 178,439株(0.68%)-0.02% |
| 12/23 | 2,960 | 3,055 | 2,959 | 3,020 | +2.2% | 135,300 | 785億2000万 | -3.79% |
| 12/23 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 184,439株(0.7%)+0.08% |
| 12/22 | 2,920 | 2,965 | 2,906 | 2,955 | +1.65% | 217,100 | 768億3000万 | -6.25% |
| 12/19 | 2,890 | 2,925 | 2,871 | 2,907 | +0.83% | 155,400 | 755億8200万 | -8.09% |
| 12/19 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 161,561株(0.62%)+0.07% |
| 12/18 | 2,813 | 2,931 | 2,805 | 2,883 | +1.23% | 284,000 | 749億5800万 | -9.28% |
| 12/18 | (空売り報告)GOLDMAN SACHS INTERNATIONAL 143,761株(0.55%)再IN |
| 12/17 | 2,858 | 2,885 | 2,808 | 2,848 | -0.77% | 264,100 | 740億4800万 | -10.86% |
| 12/16 | 2,999 | 3,000 | 2,852 | 2,870 | -2.84% | 170,400 | 746億2000万 | -10.73% |
| 12/15 | (IR情報)15:30 単結晶PLZT薄膜ウエハの販売を開始 ~光電融合、データセンターの革新に貢献~ |
| 12/15 | 2,859 | 2,974 | 2,848 | 2,954 | +1.86% | 163,800 | 768億400万 | -8.77% |
| 12/12 | 2,967 | 2,986 | 2,885 | 2,900 | -1.53% | 255,700 | 754億 | -10.82% |
| 12/11 | 3,065 | 3,065 | 2,919 | 2,945 | -4.23% | 246,900 | 765億7000万 | -9.77% |
| 12/10 | 3,255 | 3,265 | 3,060 | 3,075 | -5.82% | 255,000 | 799億5000万 | -6.16% |
| 12/09 | 3,330 | 3,330 | 3,245 | 3,265 | -1.8% | 131,200 | 848億9000万 | -0.7% |
| 12/08 | 3,350 | 3,350 | 3,270 | 3,325 | -1.34% | 200,500 | 864億5000万 | +0.85% |
| 12/05 | 3,205 | 3,425 | 3,200 | 3,370 | +5.15% | 306,400 | 876億2000万 | +2.06% |
| 12/04 | 3,270 | 3,285 | 3,200 | 3,205 | -1.38% | 108,200 | 833億3000万 | -3% |
| 12/03 | 3,275 | 3,310 | 3,245 | 3,250 | +0.46% | 73,800 | 845億 | -1.93% |
| 12/02 | 3,290 | 3,330 | 3,225 | 3,235 | -1.82% | 99,400 | 841億1000万 | -2.71% |
| 12/01 | 3,430 | 3,430 | 3,290 | 3,295 | -1.93% | 142,300 | 856億7000万 | -1.14% |
| 11/28 | (IR情報)17:20 重要な使用人等の異動に関するお知らせ |
| 11/28 | 3,300 | 3,410 | 3,280 | 3,360 | +3.07% | 191,900 | 873億6000万 | +0.75% |
| 11/27 | 3,245 | 3,285 | 3,235 | 3,260 | 0% | 168,800 | 847億6000万 | -2.34% |
| 11/26 | 3,170 | 3,275 | 3,145 | 3,260 | +2.84% | 160,700 | 847億6000万 | -2.45% |
| 11/25 | 3,300 | 3,300 | 3,155 | 3,170 | -1.4% | 197,500 | 824億2000万 | -5.23% |
| 11/21 | 3,340 | 3,365 | 3,195 | 3,215 | -5.72% | 247,100 | 835億9000万 | -3.97% |
| 11/20 | 3,400 | 3,460 | 3,355 | 3,410 | +6.9% | 324,300 | 886億6000万 | +1.7% |
| 11/19 | 3,295 | 3,335 | 3,150 | 3,190 | -3.33% | 239,900 | 829億4000万 | -4.75% |
| 11/18 | 3,315 | 3,495 | 3,275 | 3,300 | -1.35% | 404,500 | 858億 | -1.4% |
| 11/17 | 3,240 | 3,345 | 3,240 | 3,345 | +3.24% | 185,600 | 869億7000万 | -0.12% |
| 11/14 | 3,210 | 3,295 | 3,180 | 3,240 | -1.22% | 121,700 | 842億4000万 | -3.31% |
| 11/13 | 3,320 | 3,350 | 3,280 | 3,280 | -1.2% | 196,600 | 852億8000万 | -2.29% |
| 11/12 | 3,340 | 3,345 | 3,280 | 3,320 | -0.3% | 109,800 | 863億2000万 | -1.16% |
| 11/11 | 3,460 | 3,465 | 3,315 | 3,330 | -3.62% | 151,100 | 865億8000万 | -0.89% |
| 11/10 | 3,300 | 3,515 | 3,300 | 3,455 | +5.02% | 314,300 | 898億3000万 | +2.95% |
| 11/07 | 3,280 | 3,345 | 3,220 | 3,290 | +2.33% | 306,700 | 855億4000万 | -1.53% |
| 11/06 | (IR情報)15:30 インベスターズガイド2025年12月期第3四半期 |
| 11/06 | (IR情報)15:30 2025年12月期第3四半期連結業績の概要 |
| 11/06 | (IR情報)15:30 2025年12月期第3四半期決算説明資料 |
| 11/06 | (IR情報)15:30 2025年12月期第3四半期決算短信〔日本基準〕(連結) |
| 11/06 | 3,190 | 3,270 | 3,175 | 3,215 | -1.38% | 256,000 | 835億9000万 | -3.51% |
| 11/05 | 3,280 | 3,325 | 3,125 | 3,260 | -3.12% | 236,900 | 847億6000万 | -2.01% |
| 11/04 | 3,455 | 3,465 | 3,365 | 3,365 | -3.3% | 118,600 | 874億9000万 | +1.23% |
| 10/31 | 3,450 | 3,490 | 3,420 | 3,480 | +1.16% | 97,100 | 904億8000万 | +4.91% |
| 10/30 | 3,370 | 3,455 | 3,345 | 3,440 | 0% | 104,400 | 894億4000万 | +3.99% |
| 10/29 | 3,550 | 3,555 | 3,425 | 3,440 | 0% | 101,800 | 894億4000万 | +4.31% |
| 10/28 | 3,520 | 3,535 | 3,440 | 3,440 | -2.27% | 81,600 | 894億4000万 | +4.56% |
| 10/27 | 3,470 | 3,520 | 3,450 | 3,520 | +2.47% | 128,600 | 915億2000万 | +7.25% |
| 10/24 | 3,490 | 3,520 | 3,405 | 3,435 | +2.54% | 145,200 | 893億1000万 | +5.27% |
| 10/23 | 3,340 | 3,430 | 3,320 | 3,350 | -2.33% | 99,500 | 871億 | +3.2% |
| 10/22 | 3,375 | 3,455 | 3,355 | 3,430 | +1.78% | 121,900 | 891億8000万 | +6.06% |
| 10/21 | 3,350 | 3,395 | 3,300 | 3,370 | +0.75% | 103,100 | 876億2000万 | +4.69% |
| 10/20 | 3,280 | 3,345 | 3,275 | 3,345 | +3.56% | 97,700 | 869億7000万 | +4.3% |
| 10/17 | 3,310 | 3,325 | 3,230 | 3,230 | -3.29% | 93,500 | 839億8000万 | +1.29% |
| 10/16 | 3,365 | 3,390 | 3,320 | 3,340 | +1.06% | 102,700 | 868億4000万 | +5.13% |
| 10/15 | 3,225 | 3,335 | 3,195 | 3,305 | +4.59% | 137,400 | 859億3000万 | +4.49% |
| 10/14 | 3,260 | 3,315 | 3,150 | 3,160 | -5.53% | 191,500 | 821億6000万 | +0.32% |
| 10/10 | 3,495 | 3,500 | 3,340 | 3,345 | -1.33% | 144,300 | 869億7000万 | +6.56% |
| 10/09 | 3,450 | 3,490 | 3,390 | 3,390 | -0.29% | 126,500 | 881億4000万 | +8.62% |
| 10/08 | 3,455 | 3,480 | 3,360 | 3,400 | +2.56% | 128,400 | 884億 | +9.61% |