As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 10.78% |
|---|---|
| Individuals | 56.13% |
| Top 10 holders | 44.58% |
| Total shareholders | 955 |
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 | 56.13% | 804 |
| Other corporations | 25.26% | 110 |
| Foreign institutions | 10.78% | 20 |
| Financial institutions | 6.35% | 5 |
| Securities firms | 1.46% | 15 |
| Foreign individuals | 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 | イワブチ取引先持株会 | 114,000 | 10.95% |
| 2 | INTERACTIVE BROKERS LLC(常任代理人 インタラクティブ・ブローカーズ証券株式会社) | 94,900 | 9.11% |
| 3 | 住友商事株式会社 | 50,000 | 4.80% |
| 4 | 公益財団法人光奨学会 | 47,100 | 4.52% |
| 5 | イワブチグループ従業員持株会 | 37,400 | 3.59% |
| 6 | 株式会社常陽銀行 | 35,900 | 3.45% |
| 7 | 日本製鉄株式会社 | 32,000 | 3.07% |
| 8 | 光岡 毅 | 22,700 | 2.18% |
| 9 | 山口プレス工業株式会社 | 16,300 | 1.56% |
| 10 | 三井住友信託銀行株式会社 | 14,100 | 1.35% |
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.