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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 太平洋セメント | 4,978 33.19% | 4,978 33.19% | 497 33.5% | 497 33.5% | 497 33.5% | 497 33.51% | 497 33.51% | 497,828 33.51% | 497 33.51% | 497 33.52% |
| 有恒鉱業 | 2,136 14.24% | 2,136 14.24% | 213 14.37% | 213 14.38% | 213 14.37% | 213 14.38% | 213 14.38% | 213,624 14.38% | 213 14.38% | 213 14.38% |
| 二反田 静太郎 | 253 1.69% | 230 1.53% | 20 1.37% | 30 2.03% | 33 2.23% | 32 2.21% | 35 2.4% | 34,200 2.3% | 42 2.83% | 48 3.29% |
| 埼玉りそな銀行 | 318 2.12% | 318 2.12% | 31 2.14% | 31 2.14% | 31 2.14% | 31 2.14% | 31 2.14% | 31,824 2.14% | 31 2.14% | 31 2.14% |
| 山腰 玲子 | 26 1.81% | 26 1.81% | 26 1.81% | 26 1.81% | 26 1.81% | 26,900 1.81% | 26 1.81% | 26 1.81% | ||
| 中村 幸久 | 28 1.9% | 26 1.81% | 24,200 1.63% | 24 1.63% | 24 1.63% | |||||
| 諸井 恒一 | 16,103 1.08% | 16 1.08% | 16 1.08% | |||||||
| 武蔵野銀行 | 160 1.07% | 160 1.07% | 16 1.08% | 16 1.08% | 16 1.07% | 16 1.08% | 16 1.08% | 16,000 1.08% | 16 1.08% | 16 1.08% |
| 東武鉄道 | 10 0.68% | 10 0.68% | ||||||||
| 柿原林業 | 10 0.72% | 10 0.73% | 10 0.73% | 10,800 0.73% | 10 0.73% | 10 0.73% | ||||
| 増岡 英男 | 416 2.77% | 450 3% | 50 3.36% | 50 3.36% | 50 3.36% | 50 3.37% | 50 3.37% | 50,100 3.37% | ||
| 諸井 三佐保 | 157 1.05% | 157 1.05% | 15 1.06% | 15 1.06% | 15 1.05% | 15 1.06% | 15 1.06% | |||
| 中村 僚 | 403 2.69% | 386 2.57% | 32 2.2% | 28 1.94% | 28 1.94% | |||||
| 関東財務局 | 20 1.35% | |||||||||
| 齋藤 廣一 | 200 1.33% | 200 1.33% | 20 1.35% | |||||||
| 柿原 愛子 | 236 1.57% | 236 1.57% | ||||||||
| 計 | 9,257 61.72% | 9,251 61.68% | 924 62.23% | 930 62.65% | 924 62.24% | 923 62.19% | 925 62.29% | 921,579 62.03% | 889 59.87% | 896 60.34% |