As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 6.63% |
|---|---|
| Individuals | 68.56% |
| Top 10 holders | 31.74% |
| Total shareholders | 4,929 |
How to read this: each slice is a group of investors. Foreign and financial institutions are professional money; individuals are retail shareholders; other corporations are usually business partners holding strategic stakes. A large institutional slice generally means heavier analyst coverage and more trading volume.
How to read this: each line shows how one investor group's share has moved over recent years. A rising foreign or institutional line can signal growing professional interest; a falling one the opposite. Japanese companies disclose ownership once a year, so these are annual points — read the direction over several years rather than a single step.
| Investor category | Holding % | Shareholders |
|---|---|---|
| Individuals & others | 68.56% | 4,743 |
| Other corporations | 11.65% | 109 |
| Financial institutions | 11.56% | 10 |
| Foreign institutions | 6.63% | 40 |
| Securities firms | 1.56% | 18 |
| Foreign individuals | 0.03% | 8 |
| Government | 0.01% | 1 |
How to read this: a high foreign or institutional share often means the stock is widely researched and more liquid; a high individual share means retail investors hold most of the company. Percentages are of voting units.
| S.No. | Shareholder | Shares | Stake % |
|---|---|---|---|
| 1 | 油研協力会持株会 | 211,000 | 5.94% |
| 2 | 株式会社みずほ銀行 | 151,000 | 4.27% |
| 3 | 油研販売店持株会 | 141,000 | 3.99% |
| 4 | 第一生命保険株式会社 | 136,000 | 3.83% |
| 5 | DEUTSCHE BANK AG FRANKFURTCC CLT OMNI 5000000(常任代理人 株式会社みずほ銀行決済営業部) | 135,000 | 3.80% |
| 6 | 株式会社三井住友銀行 | 98,000 | 2.76% |
| 7 | 株式会社三菱UFJ銀行 | 97,000 | 2.74% |
| 8 | 酒井重工業株式会社 | 82,000 | 2.31% |
| 9 | 油研工業従業員持株会 | 39,000 | 1.11% |
| 10 | 新東工業株式会社 | 35,000 | 0.99% |
Trust banks such as Master Trust and Custody Bank appear at the top of most Japanese registers: they hold shares on behalf of many underlying funds rather than owning them outright.