윤호성

윤호성 is a declared insider of 캐스텍코리아 (chief executive), with filings sourced from DART (FSS). Over a trading history stretching from 24 April 2024 to 9 April 2026, the count stands at 23 filings.

The open-market record is one-sided, with 23 purchases worth €18k and not one sale. The totals exclude 18 filings filed without an amount. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. So far in 2026, the count stands at 10 purchases and no sales.

Half of the purchases are above €2,453 and half below. Scaled by market value, the purchases weigh a median 0.012% of market cap (sample: 5 purchases). On 1 out of 9 purchases, another insider of the same company was buying within the same 30 days. Such overlaps are known as a cluster signal: distinct people reaching the same decision at about the same time. After 5 purchases with a full 90-day history, the hit rate stands at 0% and the median 90-day move at -4.8%. Past outcomes like these are no guarantee of what comes next.

The newest entry dates from 24 April 2026: an open-market purchase of €1,358, in 캐스텍코리아. The median gap between a trade and its publication by DART (FSS) is 8 days. This delay matters because a trade only becomes useful information once it is public. Source: insider filings from DART (FSS). Past trades are no guide to future returns.