SOUTH KOREA · OPENDART
GC Corp.
녹십자홀딩스 · 005250 · KOSPI · Healthcare · Biotechnology
Score
59.3
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, −33.3% over these six months
The closing price of each day, from 14,340.00 on 2026-04-21 to 9,560.00 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 −33.3%, the typical one −20.4%, 13.0 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 |
|---|---|---|---|---|---|---|
| Heo Jin-seong | Executive | 2 | — | 168.3M KRW | 2026-04-21 | −33.3% |
| Noh Hyeong-ju | Executive | 1 | — | 29.9M KRW | 2026-06-11 | −15.8% |
Insiders' buying price vs the latest close
Insiders paid 14,031.15 KRW a share on average (11 purchase lines, 3 buyers, 2025-12-26 – 2026-06-11). The close on 2026-10-16 was 31.9% below that price.
The latest purchase (2026-06-11) was at 9,980.00 KRW; the close was 4.2% 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 |
|---|---|---|---|---|---|---|---|
| 2026-06-11 | Noh Hyeong-ju | Managing director | Bought on the exchange | 3,000 | ₩9,980 | ₩29.9M | DART ↗ |
| 2026-04-22 | Heo Jin-seong | Senior managing director | Bought on the exchange | 4,804 | ₩14,226 | ₩68.3M | DART ↗ |
| 2026-04-21 | Heo Jin-seong | Senior managing director | Bought on the exchange | 7,000 | ₩14,280 | ₩100.0M | DART ↗ |
| 2026-04-20 | Heo Jin-seong | Senior managing director | Bought on the exchange | 18,600 | ₩14,434 | ₩268.5M | DART ↗ |
| 2026-04-17 | Heo Jin-seong | Senior managing director | Bought on the exchange | 6,214 | ₩14,492 | ₩90.1M | DART ↗ |
| 2026-04-16 | Heo Jin-seong | Senior managing director | Bought on the exchange | 329 | ₩14,340 | ₩4.7M | DART ↗ |
| 2026-04-14 | Heo Jin-seong | Senior managing director | Bought on the exchange | 5,296 | ₩13,844 | ₩73.3M | DART ↗ |
| 2026-03-10 | Park Jeong-min | Managing director | Bought on the exchange | 439 | ₩13,800 | ₩6.1M | DART ↗ |
| 2026-03-09 | Park Jeong-min | Managing director | Bought on the exchange | 2,274 | ₩13,657 | ₩31.1M | DART ↗ |
| 2026-03-06 | Park Jeong-min | Managing director | Bought on the exchange | 1,500 | ₩14,060 | ₩21.1M | DART ↗ |
| 2025-12-26 | Park Jeong-min | Managing director | Bought on the exchange | 367 | ₩16,530 | ₩6.1M | DART ↗ |
Other changes in holdings · 10
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 |
|---|---|---|---|---|---|
| 2025-12-24 | Noh Hyeong-ju | Managing director | Treasury stock bonus(+) | 1,623 | DART ↗ |
| 2025-12-24 | Lee Min-jae | Managing director | Treasury stock bonus(+) | 1,280 | DART ↗ |
| 2025-12-24 | Lee Sang-su | Managing director | Treasury stock bonus(+) | 1,443 | DART ↗ |
| 2025-12-24 | Choi Seong-won | Senior managing director | Treasury stock bonus(+) | 3,156 | DART ↗ |
| 2025-12-24 | Kim Jung-su | Managing director | Treasury stock bonus(+) | 2,104 | DART ↗ |
| 2025-12-24 | Jang Pyeong-ju | Vice president | Treasury stock bonus(+) | 1,389 | DART ↗ |
| 2025-12-24 | Park Jeong-min | Managing director | Treasury stock bonus(+) | 1,743 | DART ↗ |
| 2025-12-24 | Heo Jin-seong | Senior managing director | Treasury stock bonus(+) | 2,134 | DART ↗ |
| 2025-12-24 | Heo Yong-jun | President | Treasury stock bonus(+) | 24,473 | DART ↗ |
| 2025-01-01 | Park Jeong-min | Managing director | 신규선임(+) | 109,834 | DART ↗ |