大株主
| （単位：千株） | 2015/09 | 2016/09 | 2017/09 | 2018/09 | 2019/09 | 2020/09 | 2021/09 | 2022/09 | 2023/09 | 2024/09 |
|---|---|---|---|---|---|---|---|---|---|---|
| 西日本旅客鉄道 | 5,112 27.46% | 5,112 27.46% | 5,112 27.46% | 5,112 28.36% | 5,112 28.34% | 5,112 28.34% | 5,112 28.18% | 5,112 28.18% | 5,112 28.18% | 5,112 28.01% |
| 復建調査設計 | 4,470 24.01% | 4,470 24.01% | 4,470 24.01% | 4,470 24.8% | 4,470 24.78% | 4,470 24.78% | 4,470 24.64% | 4,470 24.64% | 4,370 24.09% | 4,370 23.94% |
| 日本国土開発 | 1,650 8.86% | 1,650 8.86% | 1,650 8.86% | 1,650 9.15% | 1,650 9.15% | 1,650 9.15% | 1,650 9.1% | 1,250 6.89% | 1,250 6.89% | 1,070 5.86% |
| アジア航測社員持株会 | 599 3.22% | 549 2.95% | 512 2.75% | 479 2.66% | 442 2.45% | 440 2.44% | 498 2.75% | 556 3.07% | 601 3.32% | 601 3.3% |
| TDCソフト | 700 3.88% | 700 3.88% | 700 3.88% | 700 3.86% | 680 3.75% | 550 3.03% | 550 3.01% | |||
| 株式會社オオバ | 351 1.95% | 351 1.95% | 351 1.95% | 351 1.93% | 341 1.88% | 341 1.88% | 341 1.87% | |||
| 光通信 | 142 0.78% | 142 0.78% | 340 1.86% | |||||||
| 日本カストディ銀行 | 237 1.31% | 266 1.46% | ||||||||
| 三井共同建設コンサルタント | 217 1.17% | 217 1.2% | 217 1.2% | 217 1.2% | 217 1.2% | 217 1.2% | 217 1.2% | 217 1.19% | ||
| 関電不動産開発 | 196 1.05% | 196 1.05% | 196 1.09% | 196 1.09% | 196 1.09% | 196 1.08% | 196 1.08% | 196 1.08% | 196 1.07% | |
| 中部電力 | 196 1.05% | 196 1.05% | 196 1.05% | 196 1.09% | 196 1.09% | 196 1.09% | 196 1.08% | 196 1.08% | ||
| アジア航測共栄会 | 118 0.66% | |||||||||
| 日本マスタートラスト信託銀行 | 219 1.22% | |||||||||
| 新日本空調 | 213 1.14% | 213 1.14% | 213 1.14% | 213 1.18% | 213 1.18% | |||||
| TDCソフトウェアエンジニアリング | 700 3.76% | 700 3.76% | 700 3.76% | |||||||
| アジア航測 | 777 4.18% | 777 4.18% | 677 3.64% | |||||||
| オオバ | 351 1.89% | 351 1.89% | 351 1.89% | |||||||
| 静環検査センター | 250 1.34% | 250 1.34% | ||||||||
| 関電不動産 | 196 1.05% | |||||||||
| 計 | 14,514 77.98% | 14,465 77.71% | 14,295 76.8% | 13,584 75.36% | 13,547 75.11% | 13,552 75.14% | 13,509 74.47% | 13,161 72.55% | 13,017 71.75% | 13,064 71.58% |