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 |
|---|---|---|---|---|---|---|---|---|---|---|
| JFEスチール | 9,600 29.2% | 9,600 29.2% | 9,600 29.18% | 960 29.18% | 960 29.18% | 960 29.88% | 960 29.88% | 960 29.88% | 960 29.88% | 960 29.88% |
| 東京瓦斯 | 3,333 10.1% | 3,333 10.1% | 3,333 10.13% | 333 10.13% | 333 10.13% | 333 10.37% | 333 10.37% | 333 10.37% | 333 10.37% | 333 10.37% |
| W不動産 | 60 1.87% | 60 1.87% | ||||||||
| 高城裕 | 35 1.09% | |||||||||
| 松田健太郎 | 28 0.87% | |||||||||
| 橋長教行 | 27 0.85% | |||||||||
| みずほ銀行 | 271 0.8% | 27 0.83% | 27 0.83% | 27 0.85% | 27 0.85% | 27 0.85% | 27 0.85% | 27 0.85% | ||
| 楽天証券 | 26 0.83% | |||||||||
| 日本鋳鉄管従業員持株会 | 25 0.78% | 27 0.84% | 23 0.74% | 21 0.67% | 23 0.72% | |||||
| SBI証券 | 22 0.7% | |||||||||
| 日本マスタートラスト信託銀行 | 420 1.3% | 466 1.4% | 499 1.52% | 63 1.94% | 43 1.32% | 133 4.15% | 238 7.42% | 161 5.03% | 87 2.73% | |
| 松原明男 | 44 1.4% | 63 1.97% | 66 2.06% | 66 2.06% | ||||||
| 河野友美 | 34 1.06% | |||||||||
| 中田勇 | 28 0.87% | 30 0.94% | ||||||||
| 松尾光章 | 23 0.73% | 23 0.73% | ||||||||
| 渡邊倉庫 | 600 1.8% | 600 1.8% | 600 1.82% | 60 1.82% | 60 1.82% | 60 1.87% | 60 1.87% | 60 1.87% | ||
| 村瀬充 | 20 0.63% | 20 0.63% | ||||||||
| 日本カストディ銀行 | 25 0.79% | 36 1.12% | ||||||||
| 井野傳次 | 16 0.51% | |||||||||
| 日本トラスティ・サービス信託銀行 | 519 1.6% | 286 0.9% | 293 0.89% | 33 1.03% | 24 0.74% | |||||
| 三菱UFJモルガン・スタンレー証券 | 27 0.85% | |||||||||
| 村瀬 充 | 20 0.61% | |||||||||
| 村山 信也 | 1,011 3.07% | 96 2.94% | ||||||||
| 松井証券 | 845 2.6% | 619 1.9% | 767 2.33% | 63 1.94% | ||||||
| BNY GCM CLIENT ACCOUNT JPRD AC ISG | 30 0.94% | |||||||||
| 第一生命保険 | 400 1.2% | 400 1.2% | ||||||||
| 証券ジャパン | 540 1.6% | |||||||||
| CBNY DFA INTL SMALL CAP VALUE PORTFOLIO | 390 1.2% | |||||||||
| 計 | 16,919 51.4% | 16,500 50.1% | 17,329 52.67% | 1,710 51.98% | 1,562 47.5% | 1,687 52.51% | 1,781 55.45% | 1,703 53.02% | 1,643 51.15% | 1,542 48.01% |