As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 5.71% |
|---|---|
| Individuals | 73.16% |
| Top 10 holders | 40.34% |
| Total shareholders | 945 |
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 | 73.16% | 830 |
| Other corporations | 13.73% | 60 |
| Foreign institutions | 5.71% | 23 |
| Financial institutions | 5.56% | 5 |
| Securities firms | 1.79% | 22 |
| Foreign individuals | 0.05% | 5 |
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 | 太平製作所自社株投資会 | 104,000 | 8.03% |
| 2 | 光通信KK投資事業有限責任組合無限責任組合員光通信株式会社 | 95,000 | 7.33% |
| 3 | 太平製作所取引先持株会 | 93,000 | 7.19% |
| 4 | インタラクティブ・ブローカーズ証券株式会社 | 51,000 | 3.93% |
| 5 | 株式会社名南製作所 | 38,000 | 2.97% |
| 6 | 内藤 幸男 | 37,000 | 2.91% |
| 7 | 齊藤 武 | 31,000 | 2.38% |
| 8 | 株式会社あいち銀行 | 25,000 | 1.92% |
| 9 | 株式会社名古屋銀行 | 25,000 | 1.92% |
| 10 | 株式会社大東工作所 | 23,000 | 1.76% |
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.