SOUTH KOREA · OPENDART
SDN Company Ltd.
SDN · 099220 · KOSDAQ · Technology · Semiconductors
Score
71.9
Insider timeline
2 insiders bought in the last 180 days, 1 of them more than once.
Tap an item for what it means.
●A purchase: the bigger the dot, the more was bought
Each dot is one insider's purchases on one day. The dot's area follows the amount: the largest purchase here gets the largest dot. Hold the pointer over a dot to see the date and the amount.
Blue line: this share's price, −63.3% over these six months
The closing price of each day, from 13,600.00 on 2026-04-21 to 4,995.00 on 2026-10-16. The line has no scale; read it for high and low: a dot on a low stretch was bought cheaply, a dot on a high stretch was not.
Dashed line: the typical stock on the same exchange, −31.9%
Taken from the 1525 other stocks on the same exchange that this site holds prices for. Each is measured from the first day of the window, and every day the middle one is drawn. It starts where the blue line starts, so the gap between the two is the difference: this share −63.3%, the typical one −31.9%, 31.4 points behind. It is not an index and not a comparison within one industry.
This company: insiders buying per month, last 12 months
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since |
|---|---|---|---|---|---|---|
| Choi Kee hyok | Board member | 7 | — | 498.3M KRW | 2026-06-05 | −46.8% |
| Choi Woo in | Board member | 1 | — | 99.9M KRW | 2026-09-16 | −2.3% |
Insiders' buying price vs the latest close
The share has split since the purchases, so the filed prices and today's price are on different bases.
Insider trades on the exchange
Purchases and sales on the exchange in the last 12 months. The filing gives the settlement date; the trade date is two trading days earlier.
| Trade date | Insider | Role | Trade | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-16 | Choi Woo in | Inside director | Bought on the exchange | 18,260 | ₩5,473 | ₩99.9M | DART ↗ |
| 2026-06-22 | Choi Kee hyok | Inside director | Bought on the exchange | 69,070 | ₩974 | ₩67.3M | DART ↗ |
| 2026-06-19 | Choi Kee hyok | Inside director | Bought on the exchange | 100,000 | ₩979 | ₩97.9M | DART ↗ |
| 2026-06-18 | Choi Kee hyok | Inside director | Bought on the exchange | 60,241 | ₩995 | ₩59.9M | DART ↗ |
| 2026-06-17 | Choi Kee hyok | Inside director | Bought on the exchange | 54,474 | ₩986 | ₩53.7M | DART ↗ |
| 2026-06-10 | Choi Kee hyok | Inside director | Bought on the exchange | 100,000 | ₩988 | ₩98.8M | DART ↗ |
| 2026-06-09 | Choi Kee hyok | Inside director | Bought on the exchange | 37,806 | ₩931 | ₩35.2M | DART ↗ |
| 2026-06-05 | Choi Kee hyok | Inside director | Bought on the exchange | 91,328 | ₩936 | ₩85.5M | DART ↗ |
Other changes in holdings · 6
Option exercises, grants, new shares, inheritance, gifts, off-exchange trades and trades by companies and funds. Not counted in the score.
| Date | Insider | Role | Reason | Shares | Filing |
|---|---|---|---|---|---|
| 2026-08-25 | Park Choon Yong | Auditor | Stock consolidation | 6,840 | DART ↗ |
| 2026-08-25 | Jeong Sung won | CEO | Stock consolidation | 152,159 | DART ↗ |
| 2026-08-25 | Back Hyung keun | CEO | Stock consolidation | 342,906 | DART ↗ |
| 2026-08-25 | Choi Woo in | Inside director | Stock consolidation | 661,266 | DART ↗ |
| 2026-08-25 | Choi Kee hyok | Inside director | Stock consolidation | 3,899,628 | DART ↗ |
| 2025-03-27 | Park Hak Bong | Inside director | Executive retirement(-) | 283,545 | DART ↗ |