Stock Trading Canary

Built: 2026-10-19T16:02:49+00:00 · 中文

← South Korea

SOUTH KOREA · OPENDART

NatureandEnvironmentCo.,Ltd.

자연과환경 · 043910 · KOSDAQ · Industrials · Waste Management

Score

53.9

Rank 335 of 745 · KR-v1 · as of 2026-10-18

Buyers 35%40
Size 25%54
Role 20%65
Recency 10%34
Conviction 10%100

Insider timeline

2 insiders bought within 6 days, 21 May to 26 May: 1 Executive, 1 CEO / chair. 1 of them bought again later. The share closed at 3,480.00 on the first of those days and at 3,040.00 most recently (−12.6%).

Several insiders within 15 days: 2026-05-21 – 2026-05-26Lee Byeong-yongLee Byeong-yongChief Executive OfficerCEO / chairKIM JUN SUKIM JUN SUMember of the executive committeeExecutive2026-04-22 · Lee Byeong-yong · purchase · 4,270,203 KRW2026-04-23 · Lee Byeong-yong · purchase · 749,997 KRW2026-04-24 · Lee Byeong-yong · purchase · 1,980,000 KRW2026-04-28 · Lee Byeong-yong · purchase · 59,403,500 KRW2026-05-20 · KIM JUN SU · purchase · 4,065,114 KRW2026-05-21 · KIM JUN SU · purchase · 1,038,828 KRW2026-05-21 · Lee Byeong-yong · purchase · 15,455,280 KRW2026-05-26 · Lee Byeong-yong · purchase · 2,999,500 KRW2026-06-08 · Lee Byeong-yong · purchase · 1,855,360 KRW2026-06-11 · Lee Byeong-yong · purchase · 22,026,900 KRW2026-06-12 · Lee Byeong-yong · purchase · 6,893,898 KRW2026-08-13 · Lee Byeong-yong · purchase · 5,585,580 KRW2026-08-14 · Lee Byeong-yong · purchase · 2,208,000 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.

▮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 21 May – 26 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, −37.8% over these six months

The closing price of each day, from 4,890.00 on 2026-04-21 to 3,040.00 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 −37.8%, the typical one −31.9%, 6.0 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
1Jan
1Feb
1Mar
1Apr
2May
1Jun
Jul
1Aug
Sep
Oct

Darker bars are inside the 180-day window above.

Who traded

InsiderRolePurchasesSalesBoughtFirst purchaseShare price since
Lee Byeong-yongCEO / chair11—123.4M KRW2026-04-22−39.3%
KIM JUN SUExecutive2—5.1M KRW2026-05-20−24.0%

Insiders' buying price vs the latest close

Insiders paid 3,256.55 KRW a share on average (9 purchase lines, 2 buyers, 2026-05-20 – 2026-08-14). The close on 2026-10-16 was 6.6% below that price.

The latest purchase (2026-08-14) was at 3,200.00 KRW; the close was 5.0% below that price.

Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored. 25 more purchase lines could not be compared with the share price and are left out.

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
2026-08-14Lee Byeong-yongCEOBought on the exchange690₩3,200₩2.2MDART ↗
2026-08-13Lee Byeong-yongCEOBought on the exchange1,716₩3,255₩5.6MDART ↗
2026-06-12Lee Byeong-yongCEOBought on the exchange2,211₩3,118₩6.9MDART ↗
2026-06-11Lee Byeong-yongCEOBought on the exchange7,404₩2,975₩22.0MDART ↗
2026-06-08Lee Byeong-yongCEOBought on the exchange640₩2,899₩1.9MDART ↗
2026-05-26Lee Byeong-yongCEOBought on the exchange857₩3,500₩3.0MDART ↗
2026-05-21KIM JUN SUPresidentBought on the exchange298₩3,486₩1.0MDART ↗
2026-05-21Lee Byeong-yongCEOBought on the exchange4,260₩3,628₩15.5MDART ↗
2026-05-20KIM JUN SUPresidentBought on the exchange1,002₩4,057₩4.1MDART ↗
2026-04-28Lee Byeong-yongCEOBought on the exchange120,250₩494₩59.4MDART ↗
2026-04-24Lee Byeong-yongCEOBought on the exchange4,000₩495₩2.0MDART ↗
2026-04-23Lee Byeong-yongCEOBought on the exchange1,497₩501₩749,997DART ↗
2026-04-22Lee Byeong-yongCEOBought on the exchange8,841₩483₩4.3MDART ↗
2026-03-30Lee Byeong-yongCEOBought on the exchange25,004₩481₩12.0MDART ↗
2026-03-27Lee Byeong-yongCEOBought on the exchange2,910₩486₩1.4MDART ↗
2026-03-26Lee Byeong-yongCEOBought on the exchange3,039₩500₩1.5MDART ↗
2026-03-24Lee Byeong-yongCEOBought on the exchange500₩487₩243,500DART ↗
2026-03-23Lee Byeong-yongCEOBought on the exchange8,630₩489₩4.2MDART ↗
2026-03-19Lee Byeong-yongCEOBought on the exchange1,000₩497₩497,000DART ↗
2026-03-11Lee Byeong-yongCEOBought on the exchange40,652₩491₩20.0MDART ↗
2026-03-06Lee Byeong-yongCEOBought on the exchange932₩512₩477,184DART ↗
2026-03-05Lee Byeong-yongCEOBought on the exchange1,000₩472₩472,000DART ↗
2026-03-04Lee Byeong-yongCEOBought on the exchange21,880₩482₩10.5MDART ↗
2026-02-04Lee Byeong-yongCEOBought on the exchange852₩595₩506,940DART ↗
2026-02-03Lee Byeong-yongCEOBought on the exchange5,148₩578₩3.0MDART ↗
2026-02-02Lee Byeong-yongCEOBought on the exchange10,084₩576₩5.8MDART ↗
2026-01-08Lee Byeong-yongCEOBought on the exchange15,101₩607₩9.2MDART ↗
2026-01-06Lee Byeong-yongCEOBought on the exchange12,004₩623₩7.5MDART ↗
2026-01-05Lee Byeong-yongCEOBought on the exchange4,673₩625₩2.9MDART ↗
2025-10-29Lee Byeong-yongCEOBought on the exchange626₩626₩391,876DART ↗
2025-10-27Lee Byeong-yongCEOBought on the exchange780₩643₩501,540DART ↗
2025-10-24Lee Byeong-yongCEOBought on the exchange1,239₩645₩799,155DART ↗
2025-10-22Lee Byeong-yongCEOBought on the exchange8,928₩641₩5.7MDART ↗
2025-10-21Lee Byeong-yongCEOBought on the exchange4,370₩651₩2.8MDART ↗
Other changes in holdings · 2

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

DateInsiderRoleReasonSharesFiling
2026-05-02KIM JUN SUPresidentStock consolidation33,300DART ↗
2026-05-02Lee Byeong-yongCEOStock consolidation3,184,083DART ↗