| 2022 |
| 06/15 | （IR情報）15:30 当社株式の上場廃止のお知らせ |
| 06/15 | 1,297 | 1,299 | 1,297 | 1,298 | +0.08% | 44,300 | 192億6147万 | 0% |
| 06/14 | 1,297 | 1,298 | 1,297 | 1,297 | 0% | 6,500 | 192億4663万 | -0.08% |
| 06/13 | 1,297 | 1,299 | 1,297 | 1,297 | -0.08% | 10,000 | 192億4663万 | -0.08% |
| 06/10 | 1,300 | 1,300 | 1,298 | 1,298 | -0.23% | 5,700 | 192億6147万 | 0% |
| 06/09 | 1,300 | 1,301 | 1,298 | 1,301 | +0.08% | 7,700 | 193億599万 | +0.23% |
| 06/08 | 1,297 | 1,302 | 1,297 | 1,300 | +0.08% | 17,600 | 192億9115万 | +0.23% |
| 06/07 | 1,297 | 1,300 | 1,297 | 1,299 | +0.15% | 29,300 | 192億7631万 | +0.15% |
| 06/06 | 1,297 | 1,298 | 1,297 | 1,297 | -0.08% | 14,600 | 192億4663万 | 0% |
| 06/03 | 1,298 | 1,298 | 1,297 | 1,298 | +0.08% | 19,100 | 192億6147万 | +0.08% |
| 06/02 | 1,297 | 1,298 | 1,297 | 1,297 | 0% | 44,800 | 192億4663万 | 0% |
| 06/01 | 1,297 | 1,298 | 1,297 | 1,297 | 0% | 27,900 | 192億4663万 | 0% |
| 05/31 | 1,297 | 1,299 | 1,297 | 1,297 | -0.31% | 42,000 | 192億4663万 | -0.08% |
| 05/30 | （IR情報）15:30 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係る承認決議に関するお知らせ |
| 05/30 | 1,298 | 1,301 | 1,297 | 1,301 | +0.31% | 21,500 | 193億599万 | +0.23% |
| 05/27 | 1,298 | 1,299 | 1,297 | 1,297 | 0% | 9,500 | 192億4663万 | -0.08% |
| 05/26 | 1,298 | 1,298 | 1,297 | 1,297 | 0% | 2,700 | 192億4663万 | -0.08% |
| 05/25 | 1,298 | 1,298 | 1,297 | 1,297 | 0% | 7,100 | 192億4663万 | -0.08% |
| 05/24 | 1,297 | 1,299 | 1,297 | 1,297 | 0% | 9,600 | 192億4663万 | -0.08% |
| 05/23 | 1,298 | 1,299 | 1,297 | 1,297 | 0% | 9,000 | 192億4663万 | -0.08% |
| 05/20 | 1,298 | 1,298 | 1,297 | 1,297 | 0% | 12,300 | 192億4663万 | -0.08% |
| 05/19 | 1,299 | 1,299 | 1,297 | 1,297 | 0% | 6,100 | 192億4663万 | -0.08% |
| 05/18 | 1,298 | 1,299 | 1,297 | 1,297 | 0% | 14,300 | 192億4663万 | -0.08% |
| 05/17 | 1,298 | 1,299 | 1,297 | 1,297 | 0% | 47,900 | 192億4663万 | -0.08% |
| 05/16 | 1,301 | 1,301 | 1,297 | 1,297 | -0.08% | 15,400 | 192億4663万 | -0.08% |
| 05/13 | 1,298 | 1,300 | 1,297 | 1,298 | +0.08% | 29,400 | 192億6147万 | 0% |
| 05/12 | （IR情報）15:30 2022年6月期第3四半期決算短信〔日本基準〕(連結) |
| 05/12 | 1,298 | 1,298 | 1,297 | 1,297 | 0% | 21,400 | 192億4663万 | -0.08% |
| 05/11 | 1,297 | 1,299 | 1,297 | 1,297 | 0% | 8,100 | 192億4663万 | -0.08% |
| 05/10 | 1,298 | 1,299 | 1,297 | 1,297 | 0% | 17,200 | 192億4663万 | -0.08% |
| 05/09 | 1,297 | 1,299 | 1,297 | 1,297 | +0.08% | 20,800 | 192億4663万 | -0.08% |
| 05/06 | 1,299 | 1,301 | 1,296 | 1,296 | -0.15% | 45,900 | 192億3179万 | -0.15% |
| 05/02 | 1,299 | 1,305 | 1,298 | 1,298 | -0.15% | 23,400 | 192億6147万 | 0% |
| 04/28 | 1,296 | 1,300 | 1,296 | 1,300 | +0.31% | 150,800 | 192億9115万 | +0.15% |
| 04/27 | 1,299 | 1,299 | 1,296 | 1,296 | -0.23% | 219,700 | 192億3179万 | -0.15% |
| 04/26 | 1,298 | 1,299 | 1,297 | 1,299 | +0.08% | 21,800 | 192億7631万 | +0.08% |
| 04/25 | 1,297 | 1,298 | 1,297 | 1,298 | 0% | 4,800 | 192億6147万 | 0% |
| 04/22 | 1,298 | 1,300 | 1,298 | 1,298 | -0.08% | 7,100 | 192億6147万 | 0% |
| 04/21 | 1,298 | 1,301 | 1,298 | 1,299 | +0.08% | 5,200 | 192億7631万 | +0.08% |
| 04/20 | （IR情報）15:30 (訂正)「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お知らせ」の一部訂正について |
| 04/20 | 1,300 | 1,307 | 1,298 | 1,298 | -0.15% | 9,100 | 192億6147万 | 0% |
| 04/19 | 1,300 | 1,302 | 1,299 | 1,300 | 0% | 16,100 | 192億9115万 | +0.15% |
| 04/18 | （IR情報）15:30 自己株式の消却に関するお知らせ |
| 04/18 | （IR情報）15:30 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お知らせ |
| 04/18 | 1,298 | 1,301 | 1,298 | 1,300 | +0.08% | 8,900 | 192億9115万 | +0.15% |
| 04/15 | 1,299 | 1,303 | 1,298 | 1,299 | -0.23% | 25,000 | 192億7631万 | +0.08% |
| 04/14 | 1,301 | 1,302 | 1,299 | 1,302 | +0.08% | 18,000 | 193億2083万 | +0.31% |
| 04/13 | 1,300 | 1,301 | 1,298 | 1,301 | +0.15% | 19,200 | 193億599万 | +0.31% |
| 04/12 | 1,299 | 1,302 | 1,298 | 1,299 | 0% | 12,300 | 192億7631万 | +0.15% |
| 04/11 | 1,298 | 1,310 | 1,298 | 1,299 | +0.08% | 20,000 | 192億7631万 | +0.15% |
| 04/08 | 1,297 | 1,300 | 1,297 | 1,298 | +0.08% | 40,000 | 192億6147万 | +0.08% |
| 04/07 | （5%ルール）野村證券（0.05%）ノムラインターナショナルピーエルシー(NOMURA IN…（0.08%）野村アセットマネジメント（1.35%） |
| 04/07 | 1,297 | 1,298 | 1,296 | 1,297 | 0% | 41,500 | 192億4663万 | 0% |
| 04/06 | （5%ルール）I-O DATA財団（13.48%）AHC（65.44%） |
| 04/06 | 1,297 | 1,299 | 1,296 | 1,297 | 0% | 31,400 | 192億4663万 | 0% |
| 04/05 | 1,296 | 1,297 | 1,295 | 1,297 | +0.08% | 96,800 | 192億4663万 | 0% |
| 04/04 | （5%ルール）I-O DATA財団（13.48%）AHC（65.44%） |
| 04/04 | 1,295 | 1,297 | 1,295 | 1,296 | 0% | 24,800 | 192億3179万 | -0.08% |
| 04/01 | 1,295 | 1,296 | 1,295 | 1,296 | +0.08% | 37,500 | 192億3179万 | -0.08% |
| 03/31 | 1,296 | 1,297 | 1,295 | 1,295 | -0.08% | 40,200 | 192億1695万 | -0.15% |
| 03/30 | 1,295 | 1,300 | 1,295 | 1,296 | -0.23% | 27,400 | 192億3179万 | -0.08% |
| 03/29 | （IR情報）17:15 (訂正)「自己株式の無償取得に関するお知らせ」の一部訂正について |
| 03/29 | （5%ルール）I-O DATA財団（13.48%）細野昭雄（0%）細野幸江（0%）AHC（65.44%）トレント（0%） |
| 03/29 | （IR情報）15:30 自己株式の無償取得に関するお知らせ |
| 03/29 | （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 |
| 03/29 | （IR情報）15:30 株式会社AHC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及び主要株主である筆頭株主の異動に関するお知らせ |
| 03/29 | 1,294 | 1,299 | 1,294 | 1,299 | +0.39% | 17,400 | 192億7631万 | +0.15% |
| 03/28 | 1,295 | 1,297 | 1,293 | 1,294 | 0% | 46,700 | 192億211万 | -0.23% |
| 03/25 | 1,300 | 1,300 | 1,291 | 1,294 | -0.46% | 100,400 | 192億211万 | -0.23% |
| 03/24 | 1,299 | 1,300 | 1,298 | 1,300 | 0% | 51,800 | 192億9115万 | +0.23% |
| 03/23 | 1,298 | 1,300 | 1,298 | 1,300 | +0.23% | 91,200 | 192億9115万 | +0.23% |
| 03/22 | 1,299 | 1,300 | 1,297 | 1,297 | 0% | 98,200 | 192億4663万 | 0% |
| 03/18 | （5%ルール）ノムラインターナショナルピーエルシー(NOMURA IN…（4.78%）野村證券（0.36%）野村アセットマネジメント（1.28%） |
| 03/18 | 1,298 | 1,299 | 1,297 | 1,297 | 0% | 108,600 | 192億4663万 | +0.78% |
| 03/17 | 1,298 | 1,300 | 1,297 | 1,297 | 0% | 200,700 | 192億4663万 | +2.05% |
| 03/16 | 1,299 | 1,299 | 1,297 | 1,297 | -0.08% | 271,800 | 192億4663万 | +3.35% |
| 03/15 | 1,298 | 1,299 | 1,298 | 1,298 | 0% | 141,000 | 192億6147万 | +4.93% |
| 03/14 | 1,298 | 1,299 | 1,297 | 1,298 | +0.08% | 149,400 | 192億6147万 | +6.48% |
| 03/11 | 1,298 | 1,300 | 1,297 | 1,297 | -0.15% | 163,400 | 192億4663万 | +8.17% |
| 03/10 | 1,297 | 1,300 | 1,296 | 1,299 | +0.15% | 288,300 | 192億7631万 | +10.18% |
| 03/09 | 1,297 | 1,297 | 1,296 | 1,297 | +0.08% | 269,000 | 192億4663万 | +11.91% |
| 03/08 | 1,296 | 1,297 | 1,296 | 1,296 | 0% | 102,700 | 192億3179万 | +13.98% |
| 03/07 | （5%ルール）ノムラインターナショナルピーエルシー(NOMURA IN…（4.73%）野村證券（0.48%）野村アセットマネジメント（0.87%） |
| 03/07 | 1,297 | 1,297 | 1,296 | 1,296 | 0% | 97,000 | 192億3179万 | +16.34% |
| 03/04 | （5%ルール）トレント（1.82%）細野幸江（5.15%）細野昭雄（16.95%） |
| 03/04 | 1,297 | 1,298 | 1,296 | 1,296 | -0.08% | 76,000 | 192億3179万 | +18.9% |
| 03/03 | 1,297 | 1,298 | 1,296 | 1,297 | 0% | 112,900 | 192億4663万 | +21.56% |
| 03/02 | 1,296 | 1,298 | 1,296 | 1,297 | 0% | 126,100 | 192億4663万 | +24.23% |
| 03/01 | 1,298 | 1,298 | 1,297 | 1,297 | 0% | 95,600 | 192億4663万 | +26.91% |
| 02/28 | 1,296 | 1,298 | 1,296 | 1,297 | +0.08% | 253,500 | 192億4663万 | +29.7% |
| 02/25 | 1,297 | 1,298 | 1,296 | 1,296 | -0.08% | 508,900 | 192億3179万 | +32.52% |
| 02/24 | 1,297 | 1,298 | 1,297 | 1,297 | -0.08% | 169,000 | 192億4663万 | +35.67% |
| 02/22 | 1,297 | 1,298 | 1,297 | 1,298 | +0.08% | 104,900 | 192億6147万 | +38.97% |
| 02/21 | 1,297 | 1,298 | 1,297 | 1,297 | 0% | 128,000 | 192億4663万 | +42.37% |
| 02/18 | （IR情報）17:15 (訂正)「MBOの実施及び応募の推奨に関するお知らせ」の一部訂正について |
| 02/18 | 1,297 | 1,298 | 1,297 | 1,297 | 0% | 205,800 | 192億4663万 | +45.89% |
| 02/17 | 1,297 | 1,298 | 1,297 | 1,297 | -0.08% | 71,900 | 192億4663万 | +49.42% |
| 02/16 | （5%ルール）I-O DATA財団（13.48%） |
| 02/16 | 1,299 | 1,300 | 1,297 | 1,298 | -0.08% | 350,200 | 192億6147万 | +53.25% |
| 02/15 | 1,301 | 1,301 | 1,298 | 1,299 | -0.15% | 284,900 | 192億7631万 | +57.26% |
| 02/14 | 1,297 | 1,303 | 1,296 | 1,301 | +24.38% | 1,702,200 | 193億599万 | +61.82% |
| 02/10 | （5%ルール）トレント（1.82%）細野幸江（5.15%）細野昭雄（16.95%） |
| 02/10 | （5%ルール）トレント（1.82%）細野幸江（5.15%）細野昭雄（30.42%） |
| 02/10 | （5%ルール）トレント（1.82%）細野昭雄（16.95%）細野幸江（5.15%） |
| 02/10 | （5%ルール）細野昭雄（16.95%）トレント（1.82%）細野幸江（5.15%） |
| 02/10 | 1,046 | 1,046 | 1,046 | 1,046 | +16.74% | 18,600 | 155億2195万 | +33.59% |
| 02/09 | （IR情報）15:50 MBOの実施及び応募の推奨に関するお知らせ |
| 02/09 | （IR情報）15:50 株式会社AHCによる株式会社アイ・オー・データ機器(証券コード:6916)に対する公開買付けの開始に関するお知らせ |
| 02/09 | （IR情報）15:50 2022年6月期の期末配当予想の修正(無配)に関するお知らせ |
| 02/09 | （IR情報）15:50 2022年6月期第2四半期累計期間の連結業績予想と実績との差異に関するお知らせ |
| 02/09 | （IR情報）15:50 2022年6月期第2四半期決算短信〔日本基準〕(連結) |
| 02/09 | 900 | 909 | 884 | 896 | +0.56% | 97,000 | 132億9605万 | +16.06% |
| 02/08 | 860 | 893 | 860 | 891 | +3.97% | 81,900 | 132億2185万 | +16.02% |
| 02/07 | 845 | 863 | 840 | 857 | +3.25% | 93,900 | 127億1732万 | +12.32% |
| 02/04 | 804 | 832 | 802 | 830 | +2.85% | 46,900 | 123億1665万 | +9.35% |
| 02/03 | 800 | 807 | 799 | 807 | -0.12% | 21,200 | 119億7535万 | +6.75% |
| 02/02 | 786 | 810 | 786 | 808 | +3.72% | 53,000 | 119億9019万 | +7.3% |
| 02/01 | 757 | 785 | 756 | 779 | +2.91% | 54,200 | 115億5985万 | +3.87% |
| 01/31 | 720 | 762 | 716 | 757 | +5.14% | 53,700 | 112億3338万 | +1.07% |
| 01/28 | 715 | 721 | 691 | 720 | +4.35% | 145,600 | 106億8433万 | -3.87% |
| 01/27 | 725 | 729 | 690 | 690 | -4.3% | 51,700 | 102億3915万 | -8% |
| 01/26 | 729 | 733 | 720 | 721 | -1.1% | 26,300 | 106億9917万 | -4.25% |
| 01/25 | 739 | 739 | 726 | 729 | -1.62% | 40,100 | 108億1788万 | -3.32% |
| 01/24 | 742 | 755 | 741 | 741 | -1.2% | 28,300 | 109億9595万 | -2.11% |
| 01/21 | 740 | 750 | 734 | 750 | +0.67% | 27,400 | 111億2951万 | -0.92% |
| 01/20 | 740 | 749 | 735 | 745 | +0.27% | 34,600 | 110億5531万 | -1.72% |
| 01/19 | 740 | 752 | 740 | 743 | -0.27% | 49,300 | 110億2563万 | -2.24% |
| 01/18 | 743 | 755 | 735 | 745 | +0.54% | 45,600 | 110億5531万 | -2.23% |
