Who has been buying Osteonics stock?

4 distinct insiders have filed 6 disclosed insider purchases in Osteonics (226400), most recently on 2026-03-06. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Osteonics have?

Osteonics has 6 buy-side and 4 sell-side disclosures on record, covering ₩528M ($367K) in total reported value, spanning 2023-08-17 to 2026-03-06.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Osteonics 226400

Company

오스테오닉Osteonics

Insiders

Buys

Total Value

₩528M ($367K)

Avg Return

-1.03%

Last Filing

2026-03-06

Osteonics (226400) has 6 disclosed insider purchases and 4 disclosed disposals on record, filed by 4 distinct insiders. Together those filings cover ₩528M ($367K) in reported transaction value. The earliest filing StockDrifts holds for Osteonics is dated 2023-08-17; the most recent is 2026-03-06. Across these filings the average return since disclosure is -1.03%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent insider trades

Date	Type	Source	Insider	Position	Shares	Price at filing	Return	Value
2026-03-06	SELL	Market Sell	오동선 Oh Dong-seon	moving	-4.1K	-	-	-
2026-01-09	BUY	Market Buy	이동원 Lee Dong-won	CEO	4.0K	₩6,460	+2.5%	₩26M ($18K)
2026-01-08	BUY	Market Buy	이동원 Lee Dong-won	CEO	13.9K	₩6,230	+6.3%	₩87M ($60K)
2026-01-07	BUY	Market Buy	이동원 Lee Dong-won	CEO	15.9K	₩6,230	+6.3%	₩99M ($69K)
2026-01-06	BUY	Market Buy	이동원 Lee Dong-won	CEO	21.0K	₩6,210	+6.6%	₩130M ($91K)
2026-01-05	BUY	Market Buy	이동원 Lee Dong-won	CEO	11.1K	₩6,510	+1.7%	₩72M ($50K)
2025-11-25	BUY	Market Buy	윤철수 Cheolsu Yoon	Managing Director	14.0K	₩6,010	+10.2%	₩84M ($58K)
2025-03-13	BUY	신규보고	오동선 Oh Dong-seon	Managing Director	4.1K	₩7,200	-8.1%	₩29M ($20K)
2025-02-03	BUY	신규보고	윤철수 Cheolsu Yoon	Managing Director	36.0K	₩8,110	-18.4%	₩292M ($203K)
2024-12-31	SELL	임원퇴임	정의식 definition	Managing Director	-20.0K	₩6,630	+0.1%	₩133M ($92K)
2024-12-31	SELL	임원퇴임	정의식 definition	Managing Director	-18.0K	₩6,630	+0.1%	₩119M ($83K)
2024-03-08	SELL	시간외매매	이동원 Lee Dong-won	CEO	-600.0K	₩5,320	-24.4%	₩3.2B ($2.2M)
2024-01-04	SELL	Market Sell	서상호 Seo Sang-ho	moving	-1.0K	₩5,120	-29.3%	₩5M ($4K)
2023-08-31	SELL	Market Sell	서상호 Seo Sang-ho	moving	-1.0K	₩6,280	-5.4%	₩6M ($4K)
2023-08-17	SELL	Market Sell	서상호 Seo Sang-ho	moving	-3.0K	₩6,130	-8.0%	₩18M ($13K)

Frequently asked questions

Who has been buying Osteonics stock?: 4 distinct insiders have filed 6 disclosed insider purchases in Osteonics (226400), most recently on 2026-03-06. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Osteonics have?: Osteonics has 6 buy-side and 4 sell-side disclosures on record, covering ₩528M ($367K) in total reported value, spanning 2023-08-17 to 2026-03-06.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.