SOUTH KOREA · OPENDART
JETEMA Co.,Ltd.
제테마 · 216080 · KOSDAQ · Healthcare · Medical Instruments & Supplies
Score
83.6
Insider timeline
3 insiders bought within 9 days, 11 Jun to 19 Jun: 2 Executive, 1 Board member. 2 of them bought again later. 1 more bought afterwards. The share closed at 4,840.00 on the first of those days and at 5,990.00 most recently (+23.8%).
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 11 Jun – 19 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, −16.5% over these six months
The closing price of each day, from 7,170.00 on 2026-04-21 to 5,990.00 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 −16.5%, the typical one −31.9%, 15.4 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 |
|---|---|---|---|---|---|---|
| CHO SANG JUN | Executive | 2 | — | 537.8k KRW | 2026-06-15 | +20.5% |
| KIM HYUNGSUK | Executive | 5 | — | 126.5M KRW | 2026-06-19 | +29.4% |
| YOO GEUN JIK | CEO / chair | 1 | — | 16.2M KRW | 2026-08-27 | +23.9% |
| PARK JAE SEONG | Board member | 5 | — | 170.5M KRW | 2026-04-21 | −16.5% |
| kwak Minjung | Board member | 6 | — | 96.2M KRW | 2026-06-04 | +15.6% |
Insiders' buying price vs the latest close
Insiders paid 6,049.74 KRW a share on average (42 purchase lines, 7 buyers, 2025-10-20 – 2026-09-15). The close on 2026-10-16 was 1.0% below that price.
The latest purchase (2026-09-15) was at 7,228.00 KRW; the close was 17.1% 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 |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | CHO SANG JUN | Managing director | Bought on the exchange | 37 | ₩7,228 | ₩267,436 | DART ↗ |
| 2026-08-27 | YOO GEUN JIK | Vice chairman | Bought on the exchange | 3,500 | ₩4,640 | ₩16.2M | DART ↗ |
| 2026-08-18 | KIM HYUNGSUK | Vice president | Bought on the exchange | 7,000 | ₩4,160 | ₩29.1M | DART ↗ |
| 2026-07-29 | KIM HYUNGSUK | Vice president | Bought on the exchange | 104 | ₩3,985 | ₩414,440 | DART ↗ |
| 2026-07-28 | KIM HYUNGSUK | Vice president | Bought on the exchange | 9,602 | ₩4,204 | ₩40.4M | DART ↗ |
| 2026-07-22 | KIM HYUNGSUK | Vice president | Bought on the exchange | 1,000 | ₩4,217 | ₩4.2M | DART ↗ |
| 2026-06-19 | KIM HYUNGSUK | Vice president | Bought on the exchange | 11,513 | ₩4,549 | ₩52.4M | DART ↗ |
| 2026-06-15 | CHO SANG JUN | Managing director | Bought on the exchange | 55 | ₩4,915 | ₩270,325 | DART ↗ |
| 2026-06-11 | kwak Minjung | Director | Bought on the exchange | 100 | ₩4,836 | ₩483,600 | DART ↗ |
| 2026-06-11 | kwak Minjung | Director | Bought on the exchange | 456 | ₩4,680 | ₩2.1M | DART ↗ |
| 2026-06-10 | kwak Minjung | Director | Bought on the exchange | 9,870 | ₩4,742 | ₩46.8M | DART ↗ |
| 2026-06-09 | kwak Minjung | Director | Bought on the exchange | 4,574 | ₩4,845 | ₩22.2M | DART ↗ |
| 2026-06-08 | kwak Minjung | Director | Bought on the exchange | 1,700 | ₩4,811 | ₩8.2M | DART ↗ |
| 2026-06-05 | kwak Minjung | Director | Bought on the exchange | 100 | ₩4,915 | ₩491,500 | DART ↗ |
| 2026-06-04 | PARK JAE SEONG | Auditor | Bought on the exchange | 7,000 | ₩5,112 | ₩35.8M | DART ↗ |
| 2026-06-04 | kwak Minjung | Director | Bought on the exchange | 3,200 | ₩4,998 | ₩16.0M | DART ↗ |
| 2026-06-02 | PARK JAE SEONG | Auditor | Bought on the exchange | 3,000 | ₩4,792 | ₩14.4M | DART ↗ |
| 2026-06-01 | PARK JAE SEONG | Auditor | Bought on the exchange | 10,000 | ₩4,892 | ₩48.9M | DART ↗ |
| 2026-04-22 | PARK JAE SEONG | Auditor | Bought on the exchange | 5,000 | ₩7,123 | ₩35.6M | DART ↗ |
| 2026-04-21 | PARK JAE SEONG | Auditor | Bought on the exchange | 5,000 | ₩7,170 | ₩35.9M | DART ↗ |
| 2026-04-14 | PARK JAE SEONG | Auditor | Bought on the exchange | 5,000 | ₩7,422 | ₩37.1M | DART ↗ |
| 2026-04-13 | PARK JAE SEONG | Auditor | Bought on the exchange | 5,000 | ₩7,350 | ₩36.8M | DART ↗ |
| 2026-03-17 | CHO SANG JUN | Managing director | Bought on the exchange | 132 | ₩8,760 | ₩1.2M | DART ↗ |
| 2026-02-27 | PARK JAE SEONG | Auditor | Bought on the exchange | 5,000 | ₩9,790 | ₩49.0M | DART ↗ |
| 2026-02-24 | PARK JAE SEONG | Auditor | Bought on the exchange | 6,000 | ₩9,748 | ₩58.5M | DART ↗ |
| 2026-02-23 | PARK JAE SEONG | Auditor | Bought on the exchange | 5,000 | ₩10,146 | ₩50.7M | DART ↗ |
| 2026-02-20 | PARK JAE SEONG | Auditor | Bought on the exchange | 2,050 | ₩10,033 | ₩20.6M | DART ↗ |
| 2026-02-13 | PARK JAE SEONG | Auditor | Bought on the exchange | 450 | ₩10,000 | ₩4.5M | DART ↗ |
| 2026-02-12 | PARK JAE SEONG | Auditor | Bought on the exchange | 1,500 | ₩9,920 | ₩14.9M | DART ↗ |
| 2026-01-14 | PARK JAE SEONG | Auditor | Bought on the exchange | 1,000 | ₩6,945 | ₩6.9M | DART ↗ |
| 2026-01-12 | PARK JAE SEONG | Auditor | Sold on the exchange | 1,000 | ₩7,100 | ₩7.1M | DART ↗ |
| 2026-01-02 | KIM EUISU | Managing director | Bought on the exchange | 7,030 | ₩6,250 | ₩43.9M | DART ↗ |
| 2025-12-29 | KIM EUISU | Managing director | Bought on the exchange | 3,170 | ₩6,231 | ₩19.8M | DART ↗ |
| 2025-12-29 | KIM EUISU | Managing director | Bought on the exchange | 4,800 | ₩6,131 | ₩29.4M | DART ↗ |
| 2025-12-16 | CHO SANG JUN | Managing director | Bought on the exchange | 49 | ₩5,630 | ₩275,870 | DART ↗ |
| 2025-12-15 | PARK JONG WOO | Managing director | Bought on the exchange | 300 | ₩5,910 | ₩1.8M | DART ↗ |
| 2025-11-28 | YUN BUMJIN | Vice chairman | Sold on the exchange | 10,000 | ₩6,005 | ₩60.0M | DART ↗ |
| 2025-11-21 | PARK JONG WOO | Managing director | Bought on the exchange | 100 | ₩5,540 | ₩554,000 | DART ↗ |
| 2025-11-19 | CHO SANG JUN | Managing director | Bought on the exchange | 1 | ₩5,570 | ₩5,570 | DART ↗ |
| 2025-11-11 | CHO SANG JUN | Managing director | Bought on the exchange | 5 | ₩5,750 | ₩28,750 | DART ↗ |
| 2025-11-10 | CHO SANG JUN | Managing director | Bought on the exchange | 43 | ₩5,630 | ₩242,090 | DART ↗ |
| 2025-10-22 | PARK JONG WOO | Managing director | Bought on the exchange | 100 | ₩5,790 | ₩579,000 | DART ↗ |
| 2025-10-22 | PARK JAE SEONG | Auditor | Sold on the exchange | 1,000 | ₩5,800 | ₩5.8M | DART ↗ |
| 2025-10-20 | PARK JONG WOO | Managing director | Bought on the exchange | 100 | ₩5,880 | ₩588,000 | DART ↗ |
| 2025-10-20 | KIM HYUNGSUK | Vice president | Bought on the exchange | 10,000 | ₩5,749 | ₩57.5M | DART ↗ |
Other changes in holdings · 47
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 |
|---|---|---|---|---|---|
| 2026-09-23 | Nam jeong sun | CEO | Others(-) | 29,000 | DART ↗ |
| 2026-09-18 | kwak Minjung | Director | Others(+) | 50,000 | DART ↗ |
| 2026-09-18 | Nam jeong sun | CEO | Others(-) | 50,000 | DART ↗ |
| 2026-09-09 | KIM JAEYOUNG | Executive | Others(-) | 180,000 | DART ↗ |
| 2026-09-02 | Nam jeong sun | CEO | Others(-) | 10,000 | DART ↗ |
| 2026-09-02 | kwak Minjung | Director | Others(+) | 10,000 | DART ↗ |
| 2026-09-01 | Nam jeong sun | CEO | Others(-) | 50,000 | DART ↗ |
| 2026-09-01 | kwak Minjung | Director | Others(+) | 50,000 | DART ↗ |
| 2026-08-28 | Nam jeong sun | CEO | Others(-) | 10,000 | DART ↗ |
| 2026-08-28 | kwak Minjung | Director | Others(+) | 10,000 | DART ↗ |
| 2026-07-28 | Nam jeong sun | CEO | Others(-) | 50,000 | DART ↗ |
| 2026-07-28 | kwak Minjung | Director | Others(+) | 50,000 | DART ↗ |
| 2026-06-24 | Nam jeong sun | CEO | Borrowing(+) | 29,000 | DART ↗ |
| 2026-06-19 | Nam jeong sun | CEO | Borrowing(+) | 170,000 | DART ↗ |
| 2026-06-19 | kwak Minjung | Director | Lending(-) | 170,000 | DART ↗ |
| 2026-06-19 | KIM JAEYOUNG | Executive | Borrowing(+) | 180,000 | DART ↗ |
| 2026-04-21 | CHUNG HA JONG | Senior managing director | Exercise of appraisal rights(+) | 8,000 | DART ↗ |
| 2026-04-01 | LEE SINGU | Director | New appointment(+) | 6,200 | DART ↗ |
| 2026-04-01 | kwak Minjung | Director | New appointment(+) | 247,406 | DART ↗ |
| 2026-03-31 | PARK JONG WOO | Managing director | Executive retirement(-) | 5,000 | DART ↗ |
| 2026-03-31 | YUN BUMJIN | Vice chairman | Executive retirement(-) | 240,000 | DART ↗ |
| 2025-10-27 | CHUNG HA JONG | Senior managing director | Stock options(+) | 114,000 | DART ↗ |
| 2025-10-27 | YUN BUMJIN | Vice chairman | Stock options(+) | 10,000 | DART ↗ |
| 2025-07-31 | KIM SEUNGHO | Senior managing director | Executive retirement(-) | 68,000 | DART ↗ |
| 2025-07-31 | KWON YOUNGSAM | Managing director | Executive retirement(-) | 7,000 | DART ↗ |
| 2025-04-28 | YUN BUMJIN | Vice chairman | Stock options(+) | 14,000 | DART ↗ |
| 2025-03-31 | PARK JAE SEONG | Auditor | New appointment(+) | 7,490 | DART ↗ |
| 2025-03-31 | PARK JAE SEONG | Auditor | New appointment(+) | 50,000 | DART ↗ |
| 2025-03-31 | Cho gi sung | Auditor | Executive retirement(-) | 1,094 | DART ↗ |
| 2025-03-26 | CHUNG HA JONG | Senior managing director | Donation(-) | 36,000 | DART ↗ |
| 2025-02-24 | KIM HYUNGSUK | Vice president | New appointment(+) | 240,000 | DART ↗ |
| 2025-01-06 | PARK JONG WOO | Managing director | Acquisition of new shares without compensation(+) | 250 | DART ↗ |
| 2025-01-06 | Cho gi sung | Auditor | 무상신주취득(+) | 547 | DART ↗ |
| 2025-01-06 | PARK JONG WOO | Managing director | 무상신주취득(+) | 1,400 | DART ↗ |
| 2025-01-06 | KWON YOUNGSAM | Managing director | 무상신주취득(+) | 3,500 | DART ↗ |
| 2025-01-06 | JUNG YOUNG CHOON | Adviser | 무상신주취득(+) | 12,000 | DART ↗ |
| 2025-01-06 | CHUNG HA JONG | Senior managing director | 무상신주취득(+) | 31,346 | DART ↗ |
| 2025-01-06 | KIM SEUNGHO | Senior managing director | 무상신주취득(+) | 34,000 | DART ↗ |
| 2025-01-06 | LEE HAKGYU | Managing director | 무상신주취득(+) | 111,505 | DART ↗ |
| 2025-01-06 | YUN BUMJIN | Vice chairman | 무상신주취득(+) | 113,000 | DART ↗ |
| 2025-01-06 | Nam jeong sun | CEO | 무상신주취득(+) | 320,619 | DART ↗ |
| 2025-01-06 | KIM JAEYOUNG | CEO | 무상신주취득(+) | 4,233,600 | DART ↗ |
| 2024-11-01 | LEE HAKGYU | Managing director | 신규선임(+) | 111,505 | DART ↗ |
| 2024-10-23 | YUN BUMJIN | President | 주식매수선택권(+) | 7,000 | DART ↗ |
| 2024-10-23 | CHUNG HA JONG | Senior managing director | 주식매수선택권(+) | 5,000 | DART ↗ |
| 2024-10-23 | KIM SEUNGHO | Senior managing director | 주식매수선택권(+) | 10,000 | DART ↗ |
| 2024-10-23 | KWON YOUNGSAM | Managing director | 주식매수선택권(+) | 3,500 | DART ↗ |