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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ケイアールディー | 2,280 24.93% | 2,280 24.93% | 1,140 25.3% | 1,180 26.4% | 1,180 26.29% | 1,180 26.2% | 1,180 26.11% | 1,180 26.02% | 1,180 25.94% | 1,180 25.87% |
| 三相電機取引先持株会 | 1,388 15.18% | 1,454 15.9% | 693 15.4% | 660 14.77% | 664 14.79% | 597 13.26% | 602 13.32% | 594 13.09% | 615 13.53% | 609 13.36% |
| 石野製作所 | 273 2.99% | 341 3.73% | 241 5.35% | 286 6.39% | 343 7.65% | 370 8.21% | 383 8.47% | 386 8.5% | 386 8.49% | 401 8.79% |
| 石野一郎 | 226 2.48% | 248 2.72% | 133 2.96% | 154 3.44% | 193 4.31% | 233 5.17% | 247 5.46% | 250 5.51% | 250 5.49% | 250 5.48% |
| 倉茂電工 | 125 2.78% | 125 2.77% | 131 2.89% | 131 2.88% | 131 2.87% | |||||
| 黒田直樹 | 205 2.24% | 205 2.24% | 102 2.27% | 102 2.29% | 108 2.4% | 112 2.49% | 117 2.59% | 121 2.67% | 125 2.74% | 128 2.82% |
| 黒田栄子 | 206 2.25% | 206 2.25% | 103 2.29% | 103 2.3% | 103 2.29% | 103 2.29% | 103 2.28% | 103 2.27% | 103 2.26% | 103 2.26% |
| 三井住友カード | 92 2.02% | |||||||||
| 百十四銀行 | 85 1.89% | 85 1.88% | 85 1.88% | |||||||
| 明治安田生命保険相互会社 | 79 1.73% | |||||||||
| 徳永耕造 | 309 3.37% | 309 3.37% | 131 2.9% | 124 2.78% | 124 2.77% | 124 2.76% | 124 2.75% | 123 2.72% | 109 2.4% | |
| SMBCファイナンスサービス | 184 2.02% | 184 2.02% | 92 2.05% | 92 2.06% | 92 2.05% | 92 2.05% | 92 2.04% | 92 2.03% | 92 2.03% | |
| 三相電機社員持株会 | 190 2.07% | 199 2.17% | 99 2.21% | 99 2.22% | 101 2.26% | 98 2.18% | 95 2.1% | |||
| 日本トラスティ・サービス 信託銀行 | 407 4.45% | 401 4.38% | 219 4.88% | 204 4.57% | 167 3.72% | |||||
| 計 | 5,670 62.02% | 5,829 63.76% | 2,958 65.65% | 3,007 67.28% | 3,078 68.57% | 3,037 67.42% | 3,071 67.93% | 3,068 67.64% | 3,079 67.69% | 3,061 67.11% |