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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 王子ホールディングス | 463 4.97% | 463 4.97% | 381 9.29% | 381 9.6% | 381 9.65% | 381 9.65% | 381 9.65% | 381 9.65% | 381 9.65% | 763 9.65% |
| OSK社員持株会 | 480 5.15% | 518 5.55% | 263 6.4% | 273 6.88% | 284 7.2% | 293 7.43% | 296 7.49% | 312 7.91% | 311 7.87% | 553 7% |
| 西日本シティ銀行 | 378 4.06% | 378 4.06% | 189 4.61% | 189 4.76% | 189 4.79% | 189 4.79% | 189 4.79% | 189 4.79% | 189 4.79% | 378 4.79% |
| 福岡銀行 | 373 4% | 373 4% | 186 4.55% | 186 4.7% | 186 4.72% | 186 4.72% | 186 4.72% | 186 4.72% | 186 4.72% | 373 4.72% |
| 北九州銀行 | 351 3.77% | 351 3.77% | 175 4.28% | 175 4.42% | 175 4.45% | 175 4.45% | 175 4.45% | 175 4.45% | 175 4.45% | 351 4.45% |
| 三井住友海上火災保険 | 446 4.78% | 446 4.78% | 223 5.43% | 208 5.25% | 184 4.67% | 172 4.36% | 146 3.7% | 146 3.7% | 146 3.7% | 240 3.04% |
| ニシキ | 100 2.51% | 100 2.53% | 100 2.53% | 100 2.53% | 100 2.53% | 100 2.53% | 200 2.53% | |||
| 日本生命保険相互会社 | 173 1.85% | 173 1.85% | 86 2.19% | 86 2.19% | 173 2.19% | |||||
| 西日本ユウコー商事 | 147 1.87% | |||||||||
| 日本カストディ銀行 | 92 2.34% | 92 2.34% | 80 2.03% | 80 2.03% | 115 1.47% | |||||
| 東京海上日動火災保険 | 77 1.95% | 77 1.95% | ||||||||
| 中村 泰子 | 154 3.77% | 104 2.65% | ||||||||
| あいおいニッセイ同和損害保険 | 215 2.3% | 215 2.3% | 107 2.62% | 107 2.7% | 107 2.72% | 107 2.72% | 90 2.28% | |||
| 中村泰子 | 709 7.61% | 609 6.53% | 104 2.63% | 104 2.65% | 104 2.65% | |||||
| 日本トラスティ・サービス信託銀行 | 98 2.39% | 98 2.46% | 98 2.48% | |||||||
| 伊藤忠紙パルプ | 309 3.31% | 309 3.31% | 154 3.76% | |||||||
| 計 | 3,899 41.81% | 3,837 41.14% | 1,934 47.1% | 1,825 45.92% | 1,812 45.86% | 1,803 45.63% | 1,762 44.6% | 1,735 43.92% | 1,734 43.88% | 3,296 41.71% |