Stock Trading Canary

Built: 2026-10-19T16:02:49+00:00 · 中文

← South Korea

SOUTH KOREA · OPENDART

Justek, Inc.

져스텍 · 153890 · KOSDAQ · Industrials · Specialty Industrial Machinery

Score

73.1

Rank 85 of 745 · KR-v1 · as of 2026-10-18

Buyers 35%100
Size 25%50
Role 20%65
Recency 10%26
Conviction 10%100

Insider timeline

7 insiders bought within 2 days, 29 Jul to 30 Jul: 4 Executive, 2 CEO / chair, 1 Board member. The share closed at 5,560.00 on the first of those days and at 7,390.00 most recently (+32.9%).

Several insiders within 15 days: 2026-07-29 – 2026-07-30CHO SUNGHOONCHO SUNGHOONMember of the executive committeeExecutiveCHOI DONGSOOCHOI DONGSOOChief Executive OfficerCEO / chairJEONG HYOGEUNJEONG HYOGEUNMember of the executive committeeExecutiveKIM HEUNGJUNGKIM HEUNGJUNGMember of the executive committeeExecutiveKIM KANGOKIM KANGOMember of the executive committeeExecutiveKIM YONGYILKIM YONGYILChief Executive OfficerCEO / chairLEE HEEDONGLEE HEEDONGDirectorBoard member2026-07-29 · CHO SUNGHOON · purchase · 5,790,000 KRW2026-07-29 · CHOI DONGSOO · purchase · 17,202,000 KRW2026-07-29 · JEONG HYOGEUN · purchase · 4,104,800 KRW2026-07-29 · KIM HEUNGJUNG · purchase · 5,800,000 KRW2026-07-29 · KIM KANGO · purchase · 14,650,000 KRW2026-07-29 · KIM YONGYIL · purchase · 49,786,418 KRW2026-07-29 · LEE HEEDONG · purchase · 5,525,000 KRW2026-07-30 · JEONG HYOGEUN · purchase · 1,615,500 KRW2026-07-30 · KIM YONGYIL · purchase · 4,379,200 KRWMayJunJulAugSepOct

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 29 Jul – 30 Jul, with 7 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, −57.8% over these six months

The closing price of each day, from 17,530.00 on 2026-06-29 to 7,390.00 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, −2.1%

Taken from the 1537 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 −57.8%, the typical one −2.1%, 55.7 points behind. It is not an index and not a comparison within one industry.

This company: insiders buying per month, last 12 months

Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
7Jul
Aug
Sep
Oct

Darker bars are inside the 180-day window above.

Who traded

InsiderRolePurchasesSalesBoughtFirst purchaseShare price since
CHO SUNGHOONExecutive1—5.8M KRW2026-07-29+32.9%
CHOI DONGSOOCEO / chair1—17.2M KRW2026-07-29+32.9%
JEONG HYOGEUNExecutive2—5.7M KRW2026-07-29+32.9%
KIM HEUNGJUNGExecutive1—5.8M KRW2026-07-29+32.9%
KIM KANGOExecutive1—14.7M KRW2026-07-29+32.9%
KIM YONGYILCEO / chair2—54.2M KRW2026-07-29+32.9%
LEE HEEDONGBoard member1—5.5M KRW2026-07-29+32.9%

Insiders' buying price vs the latest close

Insiders paid 5,582.20 KRW a share on average (9 purchase lines, 7 buyers, 2026-07-29 – 2026-07-30). The close on 2026-10-16 was 32.4% above that price.

The latest purchase (2026-07-30) was at 5,540.39 KRW; the close was 33.4% above 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 dateInsiderRoleTradeSharesPriceValueFiling
2026-07-30JEONG HYOGEUNSenior managing directorBought on the exchange300₩5,385₩1.6MDART ↗
2026-07-30KIM YONGYILCEOBought on the exchange782₩5,600₩4.4MDART ↗
2026-07-29KIM KANGOSenior managing directorBought on the exchange2,500₩5,860₩14.7MDART ↗
2026-07-29CHOI DONGSOOCEOBought on the exchange3,000₩5,734₩17.2MDART ↗
2026-07-29CHO SUNGHOONManaging directorBought on the exchange1,000₩5,790₩5.8MDART ↗
2026-07-29JEONG HYOGEUNSenior managing directorBought on the exchange700₩5,864₩4.1MDART ↗
2026-07-29LEE HEEDONGDirectorBought on the exchange1,000₩5,525₩5.5MDART ↗
2026-07-29KIM HEUNGJUNGManaging directorBought on the exchange1,000₩5,800₩5.8MDART ↗
2026-07-29KIM YONGYILCEOBought on the exchange9,218₩5,401₩49.8MDART ↗
Other changes in holdings · 5

Option exercises, grants, new shares, inheritance, gifts, off-exchange trades and trades by companies and funds. Not counted in the score.

DateInsiderRoleReasonSharesFiling
2026-06-29Hee Dong-LeeDirectorNew listing(+)5,700DART ↗
2026-06-29Sung Hoon-ChoExecutiveNew listing(+)70,290DART ↗
2026-06-29Dong Soo-ChoiCEONew listing(+)94,574DART ↗
2026-06-29Yong Yil-KimCEONew listing(+)5,276,604DART ↗
2026-06-29Heung Jung-KimManaging directorNew listing(+)1,200DART ↗