Stock Trading Canary

Built: 2026-10-19T16:02:49+00:00 · 中文

← South Korea

SOUTH KOREA · OPENDART

Sphere Corp.

스피어 · 347700 · KOSDAQ · Healthcare · Health Information Services

Score

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

Insider timeline

2 insiders bought on the same day, 31 Aug: 2 Executive. 2 of them bought again later. The share closed at 21,000.00 that day and at 20,900.00 most recently (−0.5%).

Several insiders within 15 days: 2026-08-31 – 2026-08-31Choi Byung ChulChoi Byung ChulMember of the executive committeeExecutiveYoon Sang-hyeonYoon Sang-hyeonMember of the executive committeeExecutiveAndrew Thomas ErmatingerAndrew Thomas ErmatingerMember of the executive committeeExecutive2026-10-06 · Andrew Thomas Ermatinger · sale · 1,995,000,000 KRW2026-08-31 · Choi Byung Chul · purchase · 5,125,000 KRW2026-08-31 · Yoon Sang-hyeon · purchase · 5,040,000 KRW2026-10-07 · Choi Byung Chul · purchase · 10,120,000 KRW2026-10-07 · Yoon Sang-hyeon · purchase · 9,960,000 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 31 Aug, 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, −52.8% over these six months

The closing price of each day, from 44,250.00 on 2026-04-21 to 20,900.00 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 −52.8%, the typical one −31.9%, 20.9 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
Jul
2Aug
Sep
2Oct

Darker bars are inside the 180-day window above.

Who traded

InsiderRolePurchasesSalesBoughtFirst purchaseShare price since
Choi Byung ChulExecutive2—15.2M KRW2026-08-31−0.5%
Yoon Sang-hyeonExecutive2—15.0M KRW2026-08-31−0.5%
Andrew Thomas ErmatingerExecutive—1———

Purchases against sales

1%purchases
Purchases1%30.2M KRW · 4 line(s) · 2 insider(s)
Sales99%2.0bn KRW · 1 line(s) · 1 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 23,445.74 KRW a share on average (4 purchase lines, 2 buyers, 2026-08-31 – 2026-10-07). The close on 2026-10-16 was 10.9% below that price.

The latest purchase (2026-10-07) was at 25,100.00 KRW; the close was 16.7% 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 dateInsiderRoleTradeSharesPriceValueFiling
2026-10-07Choi Byung ChulVice presidentBought on the exchange400₩25,300₩10.1MDART ↗
2026-10-07Yoon Sang-hyeonManaging directorBought on the exchange400₩24,900₩10.0MDART ↗
2026-10-06Andrew Thomas ErmatingerVice presidentSold on the exchange75,000₩26,600₩2.0BDART ↗
2026-08-31Choi Byung ChulVice presidentBought on the exchange250₩20,500₩5.1MDART ↗
2026-08-31Yoon Sang-hyeonManaging directorBought on the exchange240₩21,000₩5.0MDART ↗
2026-03-03Edward ShinVice presidentSold on the exchange600₩44,400₩26.6MDART ↗
2026-02-26Choi Jin HaengPresidentSold on the exchange25,000₩42,463₩1.1BDART ↗
2026-02-20Yoon Sang-hyeonManaging directorSold on the exchange10,000₩43,872₩438.7MDART ↗
2026-02-20Choi Byung ChulVice presidentSold on the exchange10,000₩42,800₩428.0MDART ↗
2025-12-29Edward ShinVice presidentSold on the exchange500₩19,090₩9.5MDART ↗
Other changes in holdings · 12

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

DateInsiderRoleReasonSharesFiling
2026-04-30Choi Gwang-suCEOOthers(+)222,573DART ↗
2026-02-12Edward ShinVice presidentTreasury stock bonus(+)1,000DART ↗
2026-02-12Choi Jin HaengPresidentTreasury stock bonus(+)25,000DART ↗
2026-02-12Yoon Sang-hyeonManaging directorTreasury stock bonus(+)20,000DART ↗
2026-02-12Choi Byung ChulVice presidentTreasury stock bonus(+)20,000DART ↗
2026-02-03Andrew Thomas ErmatingerVice presidentTreasury stock bonus(+)100,000DART ↗
2026-01-30Choi Gwang-suCEOOthers(+)520,650DART ↗
2025-06-30KIM MIKE TAE KYUNGPresidentExecutive retirement(-)1,481,481DART ↗
2025-06-02Edward ShinVice presidentNew report(+)500DART ↗
2025-03-04Choi Gwang-suCEOMerger(+)13,991,769DART ↗
2025-03-04KIM MIKE TAE KYUNGPresidentMerger(+)1,481,481DART ↗
2025-03-04Sphere Korea Inc.10% shareholderMerger(-)3,615,686DART ↗