大株主
| （単位：千株） | 2016/03 | 2017/03 | 2018/03 | 2019/03 | 2020/03 | 2021/03 | 2022/03 | 2023/03 | 2024/03 | 2025/03 |
|---|---|---|---|---|---|---|---|---|---|---|
| 日立建機 | 2,300 25.64% | 2,300 25.64% | 2,300 25.65% | 2,300 25.65% | 1,533 17.09% | 1,533 17.09% | 983 11.67% | 983 11.64% | 783 9.25% | 783 9.23% |
| エンバイオ・ホールディングス | 767 8.55% | 767 8.55% | 767 9.11% | 767 9.08% | 767 9.06% | 767 9.04% | ||||
| 鉱研工業取引先持株会 | 314 3.5% | 323 3.6% | 334 3.72% | 343 3.82% | 330 3.68% | 348 3.88% | 422 5.02% | 505 5.99% | 546 6.45% | 612 7.22% |
| 日本マスタートラスト信託銀行 | 320 3.77% | |||||||||
| 江口 工 | 305 3.4% | 305 3.4% | 305 3.4% | 305 3.4% | 305 3.4% | 305 3.4% | 305 3.62% | 305 3.61% | 305 3.61% | 305 3.6% |
| ナガオカ | 200 2.36% | 200 2.35% | ||||||||
| 山本 尚登 | 85 1.01% | 136 1.61% | ||||||||
| 鉱研従業員持株会 | 96 1.08% | 97 1.08% | 98 1.1% | 103 1.14% | 105 1.17% | 78 0.93% | 84 1% | 99 1.17% | 115 1.35% | |
| みずほ銀行 | 115 1.28% | 115 1.28% | 115 1.28% | 115 1.28% | 115 1.28% | 115 1.28% | 115 1.36% | 115 1.36% | 115 1.35% | 115 1.35% |
| 坂井 守雄 | 100 1.18% | 100 1.18% | 100 1.18% | 100 1.17% | ||||||
| 佐藤 兼義 | 92 1.09% | |||||||||
| 山内 正義 | 54 0.6% | 89 1% | 99 1.1% | 97 1.08% | 109 1.21% | 140 1.56% | 216 2.57% | 87 1.03% | ||
| 内田 善久 | 73 0.82% | 74 0.82% | 74 0.88% | 74 0.88% | ||||||
| 水上 元一 | 72 0.8% | 72 0.8% | 72 0.8% | 72 0.8% | 72 0.85% | |||||
| 旭ダイヤモンド工業 | 143 1.6% | 143 1.6% | 143 1.6% | 143 1.6% | 143 1.6% | 143 1.6% | 100 1.18% | |||
| NOMURA PB NOMINEES LIMITED OMNIBUS-MARGIN | 275 3.07% | |||||||||
| STATE STREET BANK AND TRUST COMPANY FOR STATE STREET BANK INTERNATIONAL GMBH,LUXEMBOURG BRANCH ON BEHALF OF ITS CLINTS:CLIENT OMNI OM25 | 110 1.22% | |||||||||
| モルガン・スタンレーMUFG証券 | 91 1.02% | |||||||||
| ゴールドマンサックスインターナショナル | 98 1.09% | 241 2.69% | ||||||||
| 黒住 誠 | 70 0.78% | 102 1.14% | ||||||||
| 松井証券 | 80 0.89% | |||||||||
| 末永 幸紘 | 50 0.56% | 51 0.57% | ||||||||
| 日本証券金融 | 65 0.72% | |||||||||
| 計 | 3,517 39.22% | 3,597 40.1% | 3,618 40.35% | 3,655 40.77% | 3,724 41.53% | 3,829 42.71% | 3,163 37.58% | 3,095 36.66% | 3,094 36.57% | 3,455 40.74% |