SOUTH KOREA · OPENDART
SAMHYUN CO.,LTD
삼현 · 437730 · KOSDAQ · Industrials · Electrical Equipment & Parts
Score
59.1
Insider timeline
3 insiders bought within 5 days, 19 Jun to 23 Jun: 2 Executive, 1 CEO / chair. The share closed at 44,150.00 on the first of those days and at 39,050.00 most recently (−11.6%).
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.
▮Purple band: several insiders bought within 15 days
The band marks the stretch with the most different buyers: at most 15 days long and at least two people. Here it is 19 Jun – 23 Jun, with 3 insiders. Only the strongest stretch is marked. Several people deciding the same thing is harder to explain by one person's private reasons, but insiders often buy together just after a closed period ends, so compare it with the grey weekly bars.
Blue line: this share's price, −28.2% over these six months
The closing price of each day, from 54,400.00 on 2026-04-21 to 39,050.00 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 −28.2%, the typical one −31.9%, 3.7 points ahead. 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 |
|---|---|---|---|---|---|---|
| SEO JAEBOK | Executive | 1 | — | 43.9M KRW | 2026-06-19 | −11.6% |
| HWANG SUNGHO | CEO / chair | 1 | — | 79.0M KRW | 2026-06-23 | +2.4% |
| KIM CHANGGON | Executive | 1 | — | 8.0M KRW | 2026-06-23 | +2.4% |
Insiders' buying price vs the latest close
Insiders paid 46,747.78 KRW a share on average (35 purchase lines, 14 buyers, 2025-11-26 – 2026-06-23). The close on 2026-10-16 was 16.5% below that price.
The latest purchase (2026-06-23) was at 39,545.45 KRW; the close was 1.3% below that price.
Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored.
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 |
|---|---|---|---|---|---|---|---|
| 2026-06-23 | KIM CHANGGON | Vice president | Bought on the exchange | 200 | ₩39,750 | ₩8.0M | DART ↗ |
| 2026-06-23 | HWANG SUNGHO | CEO | Bought on the exchange | 1,000 | ₩39,500 | ₩39.5M | DART ↗ |
| 2026-06-23 | HWANG SUNGHO | CEO | Bought on the exchange | 1,000 | ₩39,550 | ₩39.5M | DART ↗ |
| 2026-06-19 | SEO JAEBOK | Vice president | Bought on the exchange | 1,000 | ₩43,900 | ₩43.9M | DART ↗ |
| 2026-03-10 | CHOI TAEKUEK | Managing director | Bought on the exchange | 480 | ₩52,300 | ₩25.1M | DART ↗ |
| 2026-03-09 | PARK MINCHEOL | Managing director | Bought on the exchange | 53 | ₩51,415 | ₩2.7M | DART ↗ |
| 2026-03-06 | CHOI TAEKUEK | Managing director | Bought on the exchange | 226 | ₩44,200 | ₩10.0M | DART ↗ |
| 2026-03-06 | PARK MINCHEOL | Managing director | Bought on the exchange | 5 | ₩50,200 | ₩251,000 | DART ↗ |
| 2026-03-06 | KANG DEOKLIM | Managing director | Bought on the exchange | 50 | ₩56,300 | ₩2.8M | DART ↗ |
| 2026-03-06 | HEO JIN | Managing director | Bought on the exchange | 29 | ₩51,069 | ₩1.5M | DART ↗ |
| 2026-03-05 | CHOI GEOSEUNG | Managing director | Sold on the exchange | 2,248 | ₩46,900 | ₩105.4M | DART ↗ |
| 2026-03-05 | HEO JIN | Managing director | Bought on the exchange | 150 | ₩49,503 | ₩7.4M | DART ↗ |
| 2026-03-05 | PARK KIWON | President | Bought on the exchange | 6,394 | ₩49,089 | ₩313.9M | DART ↗ |
| 2026-03-04 | PARK MINCHEOL | Managing director | Bought on the exchange | 122 | ₩44,810 | ₩5.5M | DART ↗ |
| 2026-03-04 | KIM TAEHYOUNG | Vice president | Bought on the exchange | 300 | ₩42,800 | ₩12.8M | DART ↗ |
| 2026-03-04 | KIM TAEHYOUNG | Vice president | Bought on the exchange | 700 | ₩43,000 | ₩30.1M | DART ↗ |
| 2026-03-04 | KANG DEOKLIM | Managing director | Bought on the exchange | 50 | ₩43,450 | ₩2.2M | DART ↗ |
| 2026-03-04 | LEE JAEKOOK | Managing director | Bought on the exchange | 1,000 | ₩46,500 | ₩46.5M | DART ↗ |
| 2026-03-04 | LEE JAEKOOK | Managing director | Bought on the exchange | 200 | ₩43,000 | ₩8.6M | DART ↗ |
| 2026-03-04 | HEO JIN | Managing director | Bought on the exchange | 150 | ₩47,270 | ₩7.1M | DART ↗ |
| 2026-03-04 | HAN BYEONGCHEOL | Managing director | Bought on the exchange | 100 | ₩48,200 | ₩4.8M | DART ↗ |
| 2026-03-04 | PARK KIWON | President | Bought on the exchange | 4,606 | ₩43,200 | ₩199.0M | DART ↗ |
| 2026-03-03 | PARK MINCHEOL | Managing director | Bought on the exchange | 125 | ₩52,520 | ₩6.6M | DART ↗ |
| 2026-03-03 | HEO JIN | Managing director | Bought on the exchange | 425 | ₩56,591 | ₩24.1M | DART ↗ |
| 2026-03-03 | KIM CHANGGON | Vice president | Bought on the exchange | 177 | ₩56,300 | ₩10.0M | DART ↗ |
| 2026-03-03 | HAN BYEONGCHEOL | Managing director | Bought on the exchange | 99 | ₩51,200 | ₩5.1M | DART ↗ |
| 2026-03-03 | WON JUNGU | Managing director | Bought on the exchange | 50 | ₩56,800 | ₩2.8M | DART ↗ |
| 2026-03-03 | WON JUNGU | Managing director | Bought on the exchange | 50 | ₩56,700 | ₩2.8M | DART ↗ |
| 2026-03-03 | WON JUNGU | Managing director | Bought on the exchange | 50 | ₩56,600 | ₩2.8M | DART ↗ |
| 2026-03-03 | WON JUNGU | Managing director | Bought on the exchange | 50 | ₩56,000 | ₩2.8M | DART ↗ |
| 2026-03-03 | HUR MANKYU | Senior managing director | Bought on the exchange | 100 | ₩54,400 | ₩5.4M | DART ↗ |
| 2026-03-03 | SEO JAEBOK | Vice president | Bought on the exchange | 500 | ₩53,000 | ₩26.5M | DART ↗ |
| 2026-03-03 | SEO JAEBOK | Vice president | Bought on the exchange | 500 | ₩56,000 | ₩28.0M | DART ↗ |
| 2026-02-27 | LEE ILNAM | Senior managing director | Sold on the exchange | 3,000 | ₩57,000 | ₩171.0M | DART ↗ |
| 2026-02-27 | LEE ILNAM | Senior managing director | Sold on the exchange | 900 | ₩58,900 | ₩53.0M | DART ↗ |
| 2026-01-23 | CHOI GEOSEUNG | Managing director | Bought on the exchange | 555 | ₩66,900 | ₩37.1M | DART ↗ |
| 2025-12-30 | HWANG SUNGHO | CEO | Bought on the exchange | 1,800 | ₩55,593 | ₩100.1M | DART ↗ |
| 2025-12-26 | HWANG SEUNGJONG | Senior managing director | Sold on the exchange | 10,120 | ₩53,876 | ₩545.2M | DART ↗ |
| 2025-12-26 | HWANG HEEJONG | 10% shareholder | Sold on the exchange | 57,780 | ₩53,918 | ₩3.1B | DART ↗ |
| 2025-12-24 | HWANG SEUNGJONG | Senior managing director | Sold on the exchange | 25,252 | ₩57,593 | ₩1.5B | DART ↗ |
| 2025-12-24 | HWANG HEEJONG | 10% shareholder | Sold on the exchange | 31,000 | ₩57,510 | ₩1.8B | DART ↗ |
| 2025-11-26 | CHOI GEOSEUNG | Managing director | Bought on the exchange | 1,693 | ₩33,199 | ₩56.2M | DART ↗ |
Other changes in holdings · 25
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 |
|---|---|---|---|---|---|
| 2026-02-24 | HWANG HEEJONG | 10% shareholder | Off-hour trading(-) | 614,376 | DART ↗ |
| 2026-02-24 | HWANG SEUNGJONG | Senior managing director | Off-hour trading(-) | 241,346 | DART ↗ |
| 2026-02-24 | PARK KISOON | 10% shareholder | Off-hour trading(-) | 446,139 | DART ↗ |
| 2026-02-24 | HWANG SUNGHO | CEO | Off-hour trading(-) | 446,139 | DART ↗ |
| 2025-01-01 | HAN BYEONGCHEOL | Managing director | New appointment(+) | 5,565 | DART ↗ |
| 2024-10-18 | HWANG SOKBO | Outside director | 무상신주취득(+) | 1,236 | DART ↗ |
| 2024-10-18 | MOON SANGWOO | Senior managing director | 무상신주취득(+) | 2,200 | DART ↗ |
| 2024-10-18 | WON JUNGU | Director | 무상신주취득(+) | 1,000 | DART ↗ |
| 2024-10-18 | JIN HONGGYUN | Executive | 무상신주취득(+) | 5,000 | DART ↗ |
| 2024-10-18 | CHOI GEOSEUNG | Director | 무상신주취득(+) | 8,000 | DART ↗ |
| 2024-10-18 | CHOI TAEKUEK | Director | 무상신주취득(+) | 8,396 | DART ↗ |
| 2024-10-18 | PARK MINCHEOL | Director | 무상신주취득(+) | 10,000 | DART ↗ |
| 2024-10-18 | KANG DEOKLIM | Director | 무상신주취득(+) | 4,000 | DART ↗ |
| 2024-10-18 | HEO JIN | Managing director | 무상신주취득(+) | 3,400 | DART ↗ |
| 2024-10-18 | KIM DAEHO | Managing director | 무상신주취득(+) | 10,608 | DART ↗ |
| 2024-10-18 | LEE JAEKOOK | Managing director | 무상신주취득(+) | 10,200 | DART ↗ |
| 2024-10-18 | KIM EUIYONG | Senior managing director | 무상신주취득(+) | 3,578 | DART ↗ |
| 2024-10-18 | LEE ILNAM | Senior managing director | 무상신주취득(+) | 2,800 | DART ↗ |
| 2024-10-18 | SEO JAEBOK | Vice president | 무상신주취득(+) | 14,000 | DART ↗ |
| 2024-10-18 | KIM CHANGGON | Vice president | 무상신주취득(+) | 2,260 | DART ↗ |
| 2024-10-18 | PARK KIWON | President | 무상신주취득(+) | 20,200 | DART ↗ |
| 2024-10-18 | PARK KISOON | 10% shareholder | 무상신주취득(+) | 2,755,872 | DART ↗ |
| 2024-10-18 | HWANG HEEJONG | 10% shareholder | 무상신주취득(+) | 5,001,920 | DART ↗ |
| 2024-10-18 | HWANG SEUNGJONG | Managing director | 무상신주취득(+) | 3,226,944 | DART ↗ |
| 2024-10-18 | HWANG SUNGHO | CEO | 무상신주취득(+) | 3,539,336 | DART ↗ |