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 |
|---|---|---|---|---|---|---|---|---|---|---|
| プラスファイブ | 2,230 32.01% | 2,230 32.01% | 2,250 35.26% | 2,250 35.26% | 2,250 35.26% | 2,250 35.26% | 4,501 35.26% | 4,659 36.55% | 4,659 36.63% | 4,659 36.63% |
| DAIWA CM SINGAPORE LTD- NOMINEE PLUS SEVEN PTE. LTD. ） | 697 10.01% | 697 10.93% | 697 10.93% | 697 10.93% | 697 10.93% | 1,395 10.93% | 1,395 10.94% | 1,395 10.97% | 1,395 10.97% | |
| 昭和螺旋管製作所 | 84 1.21% | 84 1.21% | 84 1.32% | 84 1.32% | 84 1.32% | 84 1.32% | 169 1.32% | 169 1.32% | 247 1.94% | |
| 東芳工業 | 84 1.21% | 103 1.48% | 103 1.61% | 103 1.61% | 103 1.61% | 103 1.61% | 206 1.61% | 206 1.62% | 206 1.62% | 206 1.62% |
| 光通信 | 189 1.48% | 191 1.49% | 191 1.5% | 191 1.5% | ||||||
| 槇田 重夫 | 183 1.43% | 183 1.43% | 189 1.49% | 189 1.49% | ||||||
| 島 亜紀 | 87 1.25% | 87 1.25% | 87 1.37% | 87 1.37% | 87 1.37% | 87 1.37% | 175 1.37% | 175 1.37% | 175 1.37% | 175 1.37% |
| 吉田 均 | 87 1.26% | 87 1.26% | 87 1.37% | 87 1.37% | 87 1.37% | 87 1.37% | 175 1.37% | 175 1.37% | 175 1.38% | 175 1.38% |
| 松栄金属 | 166 1.3% | |||||||||
| ヨシタケ社員持株会 | 161 2.32% | 150 2.16% | 126 1.98% | 111 1.75% | 88 1.38% | 87 1.37% | 169 1.32% | 145 1.14% | ||
| ワイズ共栄会 | 479 6.88% | 484 6.95% | 487 7.64% | 439 6.87% | 423 6.62% | 395 6.19% | 784 6.14% | 724 5.68% | 680 5.34% | |
| 日本カストディ銀行 | 115 1.8% | 228 1.79% | 235 1.85% | 238 1.87% | ||||||
| 山田 進 | 80 1.16% | 82 1.29% | 82 1.29% | |||||||
| 日本トラスティ・サービス信託銀行 | 138 2.16% | 121 1.9% | 116 1.82% | |||||||
| 山田 怜子 | 98 1.41% | 98 1.41% | 98 1.54% | 98 1.54% | ||||||
| DAIWA CM SINGAPORE LTD NOMINEE YAMADA TETSU ） | 378 5.43% | |||||||||
| DAIWA CM SINGAPORE LTD NOMINEE PLUS SEVEN PTE. LTD. ） | 319 4.57% | |||||||||
| 計 | 4,013 57.6% | 4,106 58.93% | 4,163 65.23% | 4,083 63.97% | 4,022 63.02% | 3,992 62.55% | 8,010 62.75% | 8,116 63.68% | 8,081 63.54% | 7,553 59.39% |