SEIKAGAKU CORPORATION
TSE Prime
Shareholding pattern
As reported in the annual securities report, 2026-03-31.
| Foreign institutions | 9.85% |
|---|---|
| Individuals | 31.94% |
| Top 10 holders | 52.79% |
| Total shareholders | 12,397 |
Who owns the company
Share of voting unitsOther corporations 42.6%Individuals & others 31.94%Financial institutions 14.1%Foreign institutions 9.85%Securities firms 1.5%Foreign individuals 0.02%
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 |
|---|---|---|
| Other corporations | 42.60% | 103 |
| Individuals & others | 31.94% | 12,126 |
| Financial institutions | 14.10% | 15 |
| Foreign institutions | 9.85% | 96 |
| Securities firms | 1.50% | 31 |
| Foreign individuals | 0.02% | 26 |
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 | 株式会社開生社 | 10,118,000 | 18.53% |
| 2 | 新業株式会社 | 7,843,000 | 14.36% |
| 3 | 日本マスタートラスト信託銀行株式会社（信託口） | 4,114,000 | 7.53% |
| 4 | 株式会社日本カストディ銀行（信託口） | 1,347,000 | 2.47% |
| 5 | 科研製薬株式会社 | 1,207,000 | 2.21% |
| 6 | 内藤 征吾 | 1,141,000 | 2.09% |
| 7 | ＳＴＡＴＥ ＳＴＲＥＥＴ ＢＡＮＫ ＡＮＤ ＴＲＵＳＴ ＣＯＭＰＡＮＹ ５０５１０３（常任代理人 株式会社みずほ銀行決済営業部） | 913,000 | 1.67% |
| 8 | 公益財団法人水谷糖質科学振興財団（公益口） | 828,000 | 1.52% |
| 9 | 明治安田生命保険相互会社 | 688,000 | 1.26% |
| 10 | ハイアール株式会社 | 630,000 | 1.15% |
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.