ROCK FIELD CO.,LTD.
TSE Prime
Shareholding pattern
As reported in the annual securities report, 2026-04-30.
| Foreign institutions | 2.88% |
|---|---|
| Individuals | 58.18% |
| Top 10 holders | 39.72% |
| Total shareholders | 29,900 |
Who owns the company
Share of voting unitsIndividuals & others 58.18%Financial institutions 22.24%Other corporations 15.68%Foreign institutions 2.88%Securities firms 0.98%Foreign individuals 0.04%
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.
Ownership Trend
Holding %, recent yearsForeign institutionsFinancial institutionsIndividualsOther corporationsSecurities firms
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.
Ownership detail
| Investor category | Holding % | Shareholders |
|---|---|---|
| Individuals & others | 58.18% | 29,540 |
| Financial institutions | 22.24% | 17 |
| Other corporations | 15.68% | 205 |
| Foreign institutions | 2.88% | 63 |
| Securities firms | 0.98% | 25 |
| Foreign individuals | 0.04% | 50 |
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.
Largest shareholders
| S.No. | Shareholder | Shares | Stake % |
|---|---|---|---|
| 1 | 株式会社岩田 | 2,300,000 | 8.80% |
| 2 | 日本マスタートラスト信託銀行株式会社（信託口） | 1,672,000 | 6.40% |
| 3 | ロック・フィールド取引先持株会 | 1,474,000 | 5.64% |
| 4 | 明治安田生命保険相互会社（常任代理人 株式会社日本カストディ銀行） | 1,312,000 | 5.02% |
| 5 | 株式会社四国銀行（常任代理人 株式会社日本カストディ銀行） | 1,242,000 | 4.75% |
| 6 | 岩田 弘三 | 784,000 | 3.00% |
| 7 | ロック・フィールド社員持株会 | 544,000 | 2.08% |
| 8 | 株式会社みなと銀行 | 413,000 | 1.58% |
| 9 | ニューコウチビル株式会社 | 332,000 | 1.27% |
| 10 | 株式会社三菱ＵＦＪ銀行 | 307,000 | 1.18% |
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.