大株主
| （単位：千株） | 2018/12 | 2019/12 | 2020/12 | 2021/12 | 2022/12 | 2023/12 | 2024/12 |
|---|---|---|---|---|---|---|---|
| HS興産 | 640 37.35% | 640 37.48% | 640 37.75% | 640 37.75% | 1,280 38.23% | 1,280 38.67% | 1,280 38.91% |
| 高橋克実 | 140 8.17% | 140 8.2% | 140 8.26% | 140 8.26% | 364 10.87% | 364 11% | 364 11.07% |
| イボキン従業員持株会 | 63 3.7% | 53 3.15% | 51 3.03% | 47 2.79% | 95 2.86% | 89 2.7% | 94 2.89% |
| 内藤征吾 | 80 2.45% | ||||||
| 高橋完治 | 46 1.37% | 46 1.39% | 46 1.4% | ||||
| 川島敏邦 | 15 0.94% | 20 1.22% | 46 1.39% | 46 1.4% | 46 1.41% | ||
| 山崎喜博 | 20 1.17% | 20 1.17% | 20 1.18% | 20 1.18% | 40 1.19% | 40 1.21% | 40 1.22% |
| 吉田茂 | 40 1.22% | 40 1.23% | |||||
| 三河榮子 | 37 1.14% | ||||||
| 髙橋守 | 18 1.05% | 18 1.05% | 18 1.06% | 18 1.06% | 36 1.08% | 36 1.09% | 36 1.09% |
| 日本証券金融 | 27 1.59% | 52 1.56% | 50 1.52% | ||||
| 三河長夫 | 37 1.14% | ||||||
| 成田極見 | 36 1.08% | ||||||
| SBI証券 | 34 1.03% | ||||||
| 民事信託口 受託者 高橋克実 | 80 4.72% | ||||||
| MSCO CUSTOMER SECURITIES | 33 1.96% | ||||||
| モルガン・スタンレーMUFG証券 | 17 1.06% | ||||||
| 髙橋勇史 | 80 4.67% | 80 4.69% | 80 4.72% | ||||
| 松井允三 | 25 1.5% | 33 1.97% | 40 2.39% | ||||
| SMBC日興証券 | 18 1.06% | 33 1.99% | 17 1.04% | ||||
| 宮武和寛 | 15 0.88% | ||||||
| BNYM SA/NV FOR BNYM FOR BNY GCM CLIENT ACCOUNTS M LSCB RD | 32 1.9% | ||||||
| 楽天証券 | 20 1.19% | ||||||
| NOMURA PB NOMINEES LIMITED OMNIBUS-MARGIN | 37 2.2% | ||||||
| 日本トラスティ・サービス信託銀行 | 17 1.01% | ||||||
| 計 | 1,060 61.88% | 1,072 62.8% | 1,038 61.26% | 1,044 61.59% | 2,031 60.66% | 2,030 61.33% | 2,065 62.8% |