Stock Trading Canary

Built: 2026-10-19T16:02:49+00:00 · 中文

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SOUTH KOREA · OPENDART

Justem.CO.,LTD

저스템 · 417840 · KOSDAQ · Technology · Semiconductor Equipment & Materials

Score

Not ranked: no net buying on the exchange by an individual insider in the last 180 days.

Insider timeline

2 insiders bought within 7 days, 13 May to 19 May: 1 Executive, 1 Board member. 1 of them bought again later. The share closed at 17,030.00 on the first of those days and at 15,770.00 most recently (−7.4%).

Several insiders within 15 days: 2026-05-13 – 2026-05-19Kim Sun SigKim Sun SigMember of the executive committeeExecutiveBae Do InBae Do InMember of the executive committeeExecutiveAn Ho SangAn Ho SangDirectorBoard memberLim Jin SooLim Jin SooDirectorBoard member2026-05-19 · Lim Jin Soo · sale · 97,500,000 KRW2026-05-21 · Bae Do In · sale · 196,700,000 KRW2026-05-12 · Kim Sun Sig · purchase · 10,426,200 KRW2026-05-13 · Kim Sun Sig · purchase · 10,065,000 KRW2026-05-14 · An Ho Sang · purchase · 62,480,000 KRW2026-05-19 · An Ho Sang · purchase · 18,038,000 KRW2026-05-28 · Kim Sun Sig · purchase · 9,000,000 KRW2026-06-01 · Kim Sun Sig · purchase · 4,950,000 KRW2026-06-19 · Kim Sun Sig · purchase · 5,840,000 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.

×A sale

A cross is one insider's sales on one day. People sell to pay tax, to cash in share awards or to hold less of one company, so a sale says less than a purchase does. When someone bought and sold on the same day, the cross sits beside the dot. The totals are under “Purchases against sales” below.

▮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 13 May – 19 May, 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, +43.1% over these six months

The closing price of each day, from 11,020.00 on 2026-04-21 to 15,770.00 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 +43.1%, the typical one −31.9%, 75.0 points ahead. 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
2May
1Jun
Jul
Aug
Sep
Oct

Darker bars are inside the 180-day window above.

Who traded

InsiderRolePurchasesSalesBoughtFirst purchaseShare price since
Kim Sun SigExecutive5—40.3M KRW2026-05-12+20.4%
Bae Do InExecutive—1———
An Ho SangBoard member2—80.5M KRW2026-05-14−8.6%
Lim Jin SooBoard member—1———

Purchases against sales

29%purchases
Purchases29%120.8M KRW · 7 line(s) · 2 insider(s)
Sales71%294.2M KRW · 2 line(s) · 2 insider(s)

Shares of the reported value of insider transactions in the 180-day window. Sales include disposals for tax, at option exercise or under a pre-set plan, which say little about an insider's view. The split describes what was disclosed; it is not a signal.

Insiders' buying price vs the latest close

Insiders paid 16,324.22 KRW a share on average (7 purchase lines, 2 buyers, 2026-05-12 – 2026-06-19). The close on 2026-10-16 was 3.4% below that price.

The latest purchase (2026-06-19) was at 14,600.00 KRW; the close was 8.0% 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
2026-06-19Kim Sun SigVice presidentBought on the exchange400₩14,600₩5.8MDART ↗
2026-06-01Kim Sun SigVice presidentBought on the exchange300₩16,500₩5.0MDART ↗
2026-05-28Kim Sun SigVice presidentBought on the exchange500₩18,000₩9.0MDART ↗
2026-05-21Bae Do InVice presidentSold on the exchange10,000₩19,670₩196.7MDART ↗
2026-05-19Lim Jin SooDirectorSold on the exchange5,000₩19,500₩97.5MDART ↗
2026-05-19An Ho SangDirectorBought on the exchange1,000₩18,038₩18.0MDART ↗
2026-05-14An Ho SangDirectorBought on the exchange4,000₩15,620₩62.5MDART ↗
2026-05-13Kim Sun SigVice presidentBought on the exchange600₩16,775₩10.1MDART ↗
2026-05-12Kim Sun SigVice presidentBought on the exchange600₩17,377₩10.4MDART ↗
2026-04-15Gwon Tae HoAuditorSold on the exchange7,500₩9,136₩68.5MDART ↗
Other changes in holdings · 33

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

DateInsiderRoleReasonSharesFiling
2026-09-04Park Tai-suVice presidentStock options(+)15,000DART ↗
2026-09-04Bae Do InVice presidentStock options(+)16,500DART ↗
2026-09-04Na Dong GeunVice presidentStock options(+)11,000DART ↗
2026-09-04Kim Yong JinCOOStock options(+)15,000DART ↗
2026-06-01Lim Jin SooDirectorStock options(+)5,000DART ↗
2026-06-01Bae Do InVice presidentStock options(+)30,000DART ↗
2026-06-01Na Dong GeunVice presidentStock options(+)22,000DART ↗
2026-06-01Cho Kwang HeeOutside directorStock options(+)7,500DART ↗
2026-05-27Lee Mi AeVice presidentOff-hour trading(-)150,000DART ↗
2026-05-27Ha Jung MinVice presidentOff-hour trading(-)50,000DART ↗
2026-05-27Kim Yong JinCOOOff-hour trading(-)200,000DART ↗
2026-05-27Lim Young JinCEOOff-hour trading(-)200,000DART ↗
2026-03-31Woo In KeunDirectorTreasury stock bonus(+)4,500DART ↗
2026-03-31Lee Mi AeVice presidentTreasury stock bonus(+)6,300DART ↗
2026-03-31Ha Jung MinVice presidentTreasury stock bonus(+)6,300DART ↗
2026-03-31Kim Yong JinCOOTreasury stock bonus(+)6,300DART ↗
2026-03-31Lim Young JinCEOTreasury stock bonus(+)72,377DART ↗
2026-03-12Ha Jung MinVice presidentStock options(+)19,000DART ↗
2026-03-12Lim Jin SooDirectorStock options(+)5,000DART ↗
2026-03-12Woo In KeunDirectorStock options(+)19,500DART ↗
2026-03-12Gwon Tae HoAuditorStock options(+)7,500DART ↗
2026-03-12Ko Dae HongOutside directorStock options(+)10,500DART ↗
2026-01-02Kim Yong JinCOOAcquisition of new shares without compensation(+)462,000DART ↗
2026-01-02Na Dong GeunVice presidentAcquisition of new shares without compensation(+)92,400DART ↗
2026-01-02Ko Dae HongOutside directorAcquisition of new shares without compensation(+)19,000DART ↗
2026-01-02Ha Jung MinVice presidentAcquisition of new shares without compensation(+)34,000DART ↗
2026-01-02Park Tai-suVice presidentAcquisition of new shares without compensation(+)10,000DART ↗
2026-01-02Hwang Hee SooVice presidentAcquisition of new shares without compensation(+)4,000DART ↗
2026-01-02Bae Do InVice presidentAcquisition of new shares without compensation(+)18,000DART ↗
2026-01-02Lee Mi AeVice presidentAcquisition of new shares without compensation(+)325,700DART ↗
2026-01-02Lim Young JinCEOAcquisition of new shares without compensation(+)3,802,748DART ↗
2025-05-02Lee Mi AeVice presidentStock options(+)1,150DART ↗
2025-05-02Ha Jung MinVice presidentStock options(+)5,000DART ↗