SEIKO GROUP CORPORATION
TSE Prime
Shareholding pattern
As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 24.83% |
|---|---|
| Individuals | 35.10% |
| Top 10 holders | 51.50% |
| Total shareholders | 9,156 |
Who owns the company
Share of voting unitsIndividuals & others 35.1%Foreign institutions 24.83%Financial institutions 19.85%Other corporations 19.61%Securities firms 0.55%Foreign individuals 0.06%
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 | 35.10% | 8,724 |
| Foreign institutions | 24.83% | 257 |
| Financial institutions | 19.85% | 23 |
| Other corporations | 19.61% | 105 |
| Securities firms | 0.55% | 24 |
| Foreign individuals | 0.06% | 23 |
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 | 三光起業株式会社 | 4,436,000 | 10.70% |
| 2 | 日本マスタートラスト信託銀行株式会社(信託口) | 3,761,000 | 9.10% |
| 3 | 服部 悦子 | 3,613,000 | 8.70% |
| 4 | 服部 真二 | 2,279,000 | 5.50% |
| 5 | 服部 秀生 | 1,622,000 | 3.90% |
| 6 | 第一生命保険株式会社 | 1,440,000 | 3.50% |
| 7 | 株式会社日本カストディ銀行（信託口） | 1,345,000 | 3.30% |
| 8 | THE CHASE MANHATTAN BANK, N.A. LONDONSECS LENDING OMNIBUS ACCOUNT （常任代理人 株式会社みずほ銀行決済営業部） | 1,023,000 | 2.50% |
| 9 | J.P. MORGAN BANK LUXEMBOURG S.A. 384513（常任代理人 株式会社みずほ銀行決済営業部） | 982,000 | 2.40% |
| 10 | STATE STREET BANK AND TRUST COMPANY 505223（常任代理人 株式会社みずほ銀行決済営業部） | 805,000 | 1.90% |
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.