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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 住友化学 | 199,434 50.12% | 201,134 50.55% | 204,834 51.56% | 205,634 51.76% | 205,634 51.76% | 205,634 51.76% | 205,634 51.76% | 205,634 51.76% | 205,634 51.76% | 205,634 51.76% |
| 日本マスタートラスト信託銀行 | 16,373 4.11% | 17,153 4.31% | 21,478 5.41% | 28,769 7.24% | 29,364 7.39% | 31,715 7.98% | 40,506 10.2% | 39,494 9.94% | 22,995 5.79% | 33,887 8.53% |
| 日本カストディ銀行 | 4,145 1.04% | 2,695 0.68% | 15,797 3.98% | 3,352 0.84% | 12,534 3.15% | |||||
| 日本生命保険相互会社 | 7,581 1.91% | 7,581 1.91% | 7,581 1.91% | 7,581 1.91% | 7,581 1.91% | 7,581 1.91% | 7,581 1.91% | 7,581 1.91% | 7,581 1.91% | 7,581 1.91% |
| SMBC信託銀行 | 7,000 1.76% | 7,000 1.76% | 7,000 1.76% | 7,000 1.76% | 7,000 1.76% | 7,000 1.76% | 7,000 1.76% | 7,000 1.76% | ||
| 稲畑産業 | 27,282 6.86% | 25,582 6.43% | 21,882 5.51% | 20,182 5.08% | 18,555 4.67% | 16,782 4.22% | 13,782 3.47% | 9,782 2.46% | 8,782 2.21% | 5,800 1.46% |
| 住友生命保険相互会社 | 5,776 1.45% | 5,776 1.45% | 5,776 1.45% | 5,776 1.45% | 5,776 1.45% | 5,776 1.45% | 5,776 1.45% | 5,776 1.45% | 5,776 1.45% | 5,776 1.45% |
| UBS AG LONDON A/C IPB SEGREGATED CLIENT ACCOUNT | 3,136 0.79% | |||||||||
| STATE STREET BANK AND TRUST COMPANY | 2,987 0.75% | |||||||||
| MORGAN STANLEY & CO. LLC | 2,906 0.73% | |||||||||
| 住友ファーマ従業員持株会 | 3,136 0.79% | 3,627 0.91% | ||||||||
| NORTHERN TRUST GLOBAL SERVICES SE, LUXEMBOURG RE LUDU RE:UCITS CLIENTS 15.315 PCT NON TREATY ACCOUNT | 2,835 0.71% | |||||||||
| BNYM AS AGT/CLTS NON TREATY JASDEC | 3,098 0.78% | |||||||||
| あいおいニッセイ同和損害保険 | 4,435 1.11% | 4,435 1.11% | 4,435 1.12% | 4,435 1.12% | 3,104 0.78% | 2,661 0.67% | 2,661 0.67% | |||
| STATE STREET BANK WEST CLIENT – TREATY | 2,937 0.74% | |||||||||
| 大日本住友製薬株式会社従業員持株会 | 2,934 0.74% | 2,907 0.73% | ||||||||
| 日本トラスティ・サービス信託銀行 | 7,000 1.76% | 7,000 1.76% | 12,976 3.27% | 2,908 0.73% | 3,676 0.93% | |||||
| BNYM SA/NV FOR BNYM GCM CLIENT ACCTS M ILM FE | 4,907 1.24% | |||||||||
| 資産管理サービス信託銀行 | 3,477 0.87% | 3,597 0.91% | 3,251 0.82% | |||||||
| 大日本住友製薬従業員持株会 | 4,248 1.07% | 3,687 0.93% | 3,486 0.88% | |||||||
| NORTHERN TRUST CO. RE U.S. TAX EXEMPTED PENSION FUNDS | 4,310 1.08% | |||||||||
| 計 | 286,460 71.99% | 285,917 71.86% | 293,047 73.78% | 298,294 75.08% | 297,341 74.84% | 297,059 74.76% | 300,726 75.69% | 299,962 75.5% | 278,684 70.15% | 287,243 72.3% |