Aptabio Therapeutics Inc.
KOSDAQ
Shareholding pattern
As reported to FSS/DART, 2025-12-31.
| Largest shareholder group | 27.22% |
|---|---|
| Minority shareholders | 58.01% |
| Top 10 holders | 27.22% |
| Total shareholders | 24,253 |
Who owns the company
Share of shares outstandingMinority shareholders 58.01%Largest shareholder & related parties 27.22%Institutions & other holders 14.77%
How to read this: the largest shareholder group is the controlling owner and related parties — a big slice means tight control. Minority shareholders are the many small holders. The remainder is mostly institutional and foreign money, which the regulator does not itemise separately.
Ownership detail
| Investor category | Holding % | Shareholders |
|---|---|---|
| Minority shareholders | 58.01% | 24,244 |
| Largest shareholder & related parties | 27.22% | — |
| Institutions & other holders | 14.77% | — |
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 | 이수진 | 4,894,600 | 17.42% |
| 2 | 문성환 | 2,494,208 | 8.88% |
| 3 | 문호상 | 240,000 | 0.85% |
| 4 | 문지권 | 18,353 | 0.07% |
| 5 | 정준희 | — | 0.00% |
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.