SOUTH KOREA · OPENDART
DAESUNG INDUSTRIAL CO., LTD.
대성산업 · 128820 · KOSPI · Energy · Oil & Gas Refining & Marketing
Score
56.8
Insider timeline
2 insiders bought within 10 days, 3 Aug to 12 Aug: 1 CEO / chair, 1 Board member. The share closed at 3,960.00 on the first of those days and at 4,610.00 most recently (+16.4%).
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 3 Aug – 12 Aug, with 2 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, −34.6% over these six months
The closing price of each day, from 7,050.00 on 2026-04-21 to 4,610.00 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, −20.4%
Taken from the 685 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 −34.6%, the typical one −20.4%, 14.3 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 |
|---|---|---|---|---|---|---|
| Kim Young Tae | CEO / chair | 4 | — | 199.9M KRW | 2026-07-29 | +24.6% |
| Lee Won Ho | Board member | 2 | — | 4.4M KRW | 2026-08-11 | +3.5% |
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 |
|---|---|---|---|---|---|---|---|
| 2026-08-12 | Lee Won Ho | Inside director | Bought on the exchange | 578 | ₩4,400 | ₩2.5M | DART ↗ |
| 2026-08-11 | Lee Won Ho | Inside director | Bought on the exchange | 422 | ₩4,400 | ₩1.9M | DART ↗ |
| 2026-08-03 | Kim Young Tae | CEO | Bought on the exchange | 9,015 | ₩3,969 | ₩35.8M | DART ↗ |
| 2026-07-31 | Kim Young Tae | CEO | Bought on the exchange | 1,774 | ₩3,928 | ₩7.0M | DART ↗ |
| 2026-07-30 | Kim Young Tae | CEO | Bought on the exchange | 20,000 | ₩3,940 | ₩78.8M | DART ↗ |
| 2026-07-29 | Kim Young Tae | CEO | Bought on the exchange | 21,000 | ₩3,731 | ₩78.4M | DART ↗ |
| 2026-03-11 | Lee Won Ho | Inside director | Bought on the exchange | 2,000 | ₩8,698 | ₩17.4M | DART ↗ |
| 2026-03-03 | Kim Shin Han | Non-executive director | Sold on the exchange | 32,800 | ₩10,317 | ₩338.4M | DART ↗ |
| 2025-12-19 | Lim Wan Kyu | Director | Sold on the exchange | 11,500 | ₩9,680 | ₩111.3M | DART ↗ |
| 2025-12-12 | Kim Shin Han | Non-executive director | Sold on the exchange | 90,500 | ₩8,901 | ₩805.5M | DART ↗ |
| 2025-12-12 | Kim Jung Min | Vice president | Sold on the exchange | 15,000 | ₩8,033 | ₩120.5M | DART ↗ |
| 2025-12-11 | Kim Shin Han | Non-executive director | Sold on the exchange | 100,000 | ₩7,514 | ₩751.4M | DART ↗ |
| 2025-12-04 | Kim Shin Han | Non-executive director | Sold on the exchange | 197,962 | ₩6,136 | ₩1.2B | DART ↗ |
Other changes in holdings · 16
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 |
|---|---|---|---|---|---|
| 2026-05-07 | Cho Dong Ho | Director | Others(+) | 517 | DART ↗ |
| 2026-05-07 | Lee Yen Woo | Inside director | Others(+) | 1,847 | DART ↗ |
| 2026-05-07 | Lee Myung Soon | Managing director | Others(+) | 217 | DART ↗ |
| 2026-05-07 | Shim Woo Ram | Director | Others(+) | 321 | DART ↗ |
| 2026-05-07 | Shin Dong Hyun | Director | Others(+) | 117 | DART ↗ |
| 2026-04-24 | Kim Sung Soo | Director | Others(+) | 108 | DART ↗ |
| 2026-04-24 | Park Kwang Ho | President | Others(+) | 1 | DART ↗ |
| 2026-04-24 | Lee Won Ho | Inside director | Others(+) | 66 | DART ↗ |
| 2026-04-24 | Kim Jung Min | Inside director | Others(+) | 2,471 | DART ↗ |
| 2026-04-24 | Lee Yen Woo | Inside director | Others(+) | 153 | DART ↗ |
| 2026-04-24 | Kim Shin Han | Non-executive director | Others(+) | 66,342 | DART ↗ |
| 2026-04-24 | Cha Jung Hyun | Non-executive director | Others(+) | 11,269 | DART ↗ |
| 2026-04-24 | Kim Young Tae | CEO | Others(+) | 483,854 | DART ↗ |
| 2025-12-19 | Lim Wan Kyu | Director | Others(+) | 11,500 | DART ↗ |
| 2025-08-05 | Park Kwang Ho | President | New appointment(+) | 36 | DART ↗ |
| 2025-03-28 | Kim Shin Han | Non-executive director | New appointment(+) | 2,389,527 | DART ↗ |