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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 城北興業 | 1,770 15% | 1,770 15% | 1,770 15.37% | 1,814 15.76% | 2,057 17.87% | 2,057 17.87% | 2,057 17.87% | 2,374 20.62% | 2,374 20.62% | 2,374 21.79% |
| 東京瓦斯 | 1,062 9% | 1,062 9% | 1,062 9.22% | 1,062 9.22% | 1,062 9.22% | 1,062 9.22% | 1,062 9.22% | 1,062 9.22% | 1,062 9.22% | 928 8.52% |
| 麻生 | 522 4.54% | 623 5.41% | 683 5.93% | 715 6.57% | ||||||
| 朝日生命相互会社 | 624 5.42% | 624 5.73% | ||||||||
| ナガワ | 499 4.34% | 499 4.34% | 499 4.34% | 499 4.34% | 499 4.34% | 499 4.59% | ||||
| アルファロード | 394 3.34% | 394 3.34% | 394 3.42% | 394 3.42% | 394 3.42% | 394 3.42% | 394 3.42% | 394 3.42% | 394 3.42% | 394 3.62% |
| 日本カストディ銀行 | 369 3.21% | 369 3.21% | 368 3.38% | |||||||
| 北村眞隆 | 355 3.27% | |||||||||
| 三菱UFJ銀行 | 570 4.95% | 570 4.95% | 570 4.95% | 570 4.95% | 570 4.95% | 570 4.95% | 354 3.25% | |||
| 戸田建設 | 336 2.92% | 336 2.92% | 336 3.08% | |||||||
| 三井住友銀行 | 400 3.39% | 400 3.39% | 400 3.47% | 400 3.47% | 400 3.47% | 400 3.47% | 400 3.47% | 400 3.47% | 400 3.47% | |
| 北 村 眞 隆 | 346 2.93% | 348 2.95% | 350 3.05% | 353 3.07% | 355 3.08% | 355 3.09% | 355 3.09% | 355 3.09% | 355 3.09% | |
| 朝日生命保険相互会社 | 629 5.33% | 629 5.33% | 629 5.46% | 629 5.46% | 629 5.46% | 629 5.46% | 624 5.42% | 624 5.42% | ||
| みずほ銀行 | 350 2.97% | 350 2.97% | 350 3.04% | 350 3.04% | 350 3.04% | 350 3.04% | 350 3.04% | |||
| 森 田 ユ リ | 500 4.24% | 500 4.24% | 500 4.35% | 500 4.35% | ||||||
| 協和日成社員持株会 | 302 2.57% | 312 2.65% | 309 2.69% | 299 2.6% | ||||||
| 三菱東京UFJ銀行 | 570 4.83% | 570 4.83% | 570 4.95% | |||||||
| 計 | 6,324 53.6% | 6,336 53.7% | 6,335 55.03% | 6,373 55.35% | 6,652 57.79% | 6,653 57.79% | 6,835 59.37% | 7,272 63.17% | 7,332 63.69% | 6,950 63.79% |