Insider Trading Radar

Built: 2026-10-18T22:34:41+00:00 · 中文

← South Korea

SOUTH KOREA · OPENDART

SEJOONG CO., LTD.

세중 · 039310 · KOSDAQ · Consumer Cyclical · Travel Services

Score

79.8

Rank 44 of 745 · KR-v1 · as of 2026-10-18

Buyers 35%100
Size 25%57
Role 20%90
Recency 10%26
Conviction 10%100

Insider timeline

7 insiders bought within 15 days, 14 Jul to 28 Jul: 5 Executive, 2 Board member. 1 of them bought again later. The share closed at 1,030.00 on the first of those days and at 1,182.00 most recently (+14.8%).

Several insiders within 15 days: 2026-07-14 – 2026-07-28JEONG GU CHUNGJEONG GU CHUNGMember of the executive committeeExecutivePARK YO SEOPPARK YO SEOPMember of the executive committeeExecutiveHEO TAE JINHEO TAE JINMember of the executive committeeExecutiveJEONG JIN EUKJEONG JIN EUKMember of the executive committeeExecutiveKANG JEONG GYUKANG JEONG GYUMember of the executive committeeExecutiveAHN YOUNG WOOAHN YOUNG WOODirectorBoard memberCHOI SEOK WONCHOI SEOK WONDirectorBoard member2026-06-04 · AHN YOUNG WOO · purchase · 2,540,430 KRW2026-06-18 · AHN YOUNG WOO · purchase · 1,099,558 KRW2026-06-25 · AHN YOUNG WOO · purchase · 4,980,209 KRW2026-07-14 · JEONG GU CHUNG · purchase · 19,730,300 KRW2026-07-16 · PARK YO SEOP · purchase · 20,556,000 KRW2026-07-20 · PARK YO SEOP · purchase · 2,330,000 KRW2026-07-21 · HEO TAE JIN · purchase · 19,997,450 KRW2026-07-21 · JEONG JIN EUK · purchase · 2,247,872 KRW2026-07-22 · JEONG JIN EUK · purchase · 17,413,277 KRW2026-07-23 · AHN YOUNG WOO · purchase · 9,025,310 KRW2026-07-24 · AHN YOUNG WOO · purchase · 7,409,829 KRW2026-07-24 · KANG JEONG GYU · purchase · 20,054,100 KRW2026-07-28 · AHN YOUNG WOO · purchase · 2,226,000 KRW2026-07-28 · CHOI SEOK WON · purchase · 8,847,090 KRW2026-07-29 · CHOI SEOK WON · purchase · 11,153,817 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 14 Jul – 28 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, −28.5% over these six months

The closing price of each day, from 1,654.00 on 2026-04-21 to 1,182.00 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 −28.5%, the typical one −31.9%, 3.3 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
May
1Jun
7Jul
Aug
Sep
Oct

Darker bars are inside the 180-day window above.

Who traded

InsiderRolePurchasesSalesBoughtFirst purchaseShare price since
JEONG GU CHUNGExecutive1—19.7M KRW2026-07-14+14.8%
PARK YO SEOPExecutive2—22.9M KRW2026-07-16+3.7%
HEO TAE JINExecutive1—20.0M KRW2026-07-21+2.1%
JEONG JIN EUKExecutive2—19.7M KRW2026-07-21+2.1%
KANG JEONG GYUExecutive1—20.1M KRW2026-07-24+4.0%
AHN YOUNG WOOBoard member6—27.3M KRW2026-06-04+6.3%
CHOI SEOK WONBoard member2—20.0M KRW2026-07-28+7.0%

Insiders' buying price vs the latest close

Insiders paid 1,105.46 KRW a share on average (47 purchase lines, 7 buyers, 2026-06-04 – 2026-07-29). The close on 2026-10-16 was 6.9% above that price.

The latest purchase (2026-07-29) was at 1,083.00 KRW; the close was 9.1% 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
2026-07-29CHOI SEOK WONInside directorBought on the exchange10,299₩1,083₩11.2MDART ↗
2026-07-28CHOI SEOK WONInside directorBought on the exchange8,154₩1,085₩8.8MDART ↗
2026-07-28AHN YOUNG WOOInside directorBought on the exchange2,000₩1,113₩2.2MDART ↗
2026-07-24KANG JEONG GYUManaging directorBought on the exchange17,700₩1,133₩20.1MDART ↗
2026-07-24AHN YOUNG WOOInside directorBought on the exchange6,517₩1,137₩7.4MDART ↗
2026-07-23AHN YOUNG WOOInside directorBought on the exchange7,910₩1,141₩9.0MDART ↗
2026-07-22JEONG JIN EUKManaging directorBought on the exchange15,451₩1,127₩17.4MDART ↗
2026-07-21HEO TAE JINManaging directorBought on the exchange17,650₩1,133₩20.0MDART ↗
2026-07-21JEONG JIN EUKManaging directorBought on the exchange1,984₩1,133₩2.2MDART ↗
2026-07-20PARK YO SEOPSenior managing directorBought on the exchange2,000₩1,165₩2.3MDART ↗
2026-07-16PARK YO SEOPSenior managing directorBought on the exchange18,000₩1,142₩20.6MDART ↗
2026-07-14JEONG GU CHUNGVice presidentBought on the exchange19,100₩1,033₩19.7MDART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange35₩924₩32,340DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange12₩928₩11,136DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange76₩929₩70,604DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange36₩930₩33,480DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange52₩933₩48,516DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange182₩934₩169,988DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange46₩935₩43,010DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange16₩936₩14,976DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange189₩937₩177,093DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange131₩938₩122,878DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange438₩939₩411,282DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange204₩942₩192,168DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange1,315₩944₩1.2MDART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange22₩945₩20,790DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange47₩946₩44,462DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange47₩948₩44,556DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange1₩949₩949DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange1₩950₩950DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange1₩951₩951DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange1₩952₩952DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange6₩953₩5,718DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange36₩954₩34,344DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange60₩955₩57,300DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange35₩956₩33,460DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange50₩957₩47,850DART ↗
2026-06-25AHN YOUNG WOOInside directorBought on the exchange2,212₩958₩2.1MDART ↗
2026-06-18AHN YOUNG WOOInside directorBought on the exchange133₩996₩132,468DART ↗
2026-06-18AHN YOUNG WOOInside directorBought on the exchange970₩997₩967,090DART ↗
2026-06-04AHN YOUNG WOOInside directorBought on the exchange114₩1,134₩129,276DART ↗
2026-06-04AHN YOUNG WOOInside directorBought on the exchange24₩1,136₩27,264DART ↗
2026-06-04AHN YOUNG WOOInside directorBought on the exchange275₩1,138₩312,950DART ↗
2026-06-04AHN YOUNG WOOInside directorBought on the exchange101₩1,140₩115,140DART ↗
2026-06-04AHN YOUNG WOOInside directorBought on the exchange222₩1,143₩253,746DART ↗
2026-06-04AHN YOUNG WOOInside directorBought on the exchange566₩1,144₩647,504DART ↗
2026-06-04AHN YOUNG WOOInside directorBought on the exchange917₩1,150₩1.1MDART ↗