Who has been buying Bioneer stock?

2 distinct insiders have filed 2 disclosed insider purchases in Bioneer (064550), most recently on 2026-01-28. 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 Bioneer have?

Bioneer has 2 buy-side and 0 sell-side disclosures on record, covering ₩75M ($52K) in total reported value, spanning 2024-05-13 to 2026-01-28.

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.

Bioneer 064550

Company

바이오니아Bioneer

Insiders

Buys

Total Value

₩75M ($52K)

Avg Return

-23.17%

Last Filing

2026-01-28

Bioneer (064550) has 2 disclosed insider purchases and 0 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩75M ($52K) in reported transaction value. The earliest filing StockDrifts holds for Bioneer is dated 2024-05-13; the most recent is 2026-01-28. Across these filings the average return since disclosure is -23.17%, 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
2026-01-28	SELL	증여	박한오 Park Han-oh	CEO	-30.1K	₩13,790	+6.8%	₩415M ($288K)
2026-01-28	SELL	증여	박한오 Park Han-oh	CEO	-30.1K	₩13,790	+6.8%	₩415M ($288K)
2025-12-31	BUY	PROGRAM	이중열 double row	Managing Director	100	₩12,690	+1.3%	₩1M ($881)
2025-12-31	BUY	PROGRAM	오종억 Jong-Eok Oh	moving	701	₩12,690	+1.3%	₩9M ($6K)
2025-12-31	BUY	PROGRAM	이삼용 Lee Sam-yong	moving	467	₩12,690	+1.3%	₩6M ($4K)
2025-12-31	BUY	PROGRAM	한은수 Eunsoo Han	moving	234	₩12,690	+1.3%	₩3M ($2K)
2025-12-31	BUY	PROGRAM	이찬효 Chanhyo Lee	Managing Director	593	₩12,690	+1.3%	₩8M ($5K)
2025-12-31	BUY	PROGRAM	김성태 Seongtae Kim	Managing Director	1.3K	₩12,690	+1.3%	₩16M ($11K)
2025-12-31	BUY	PROGRAM	기혜나 Kihye-na	moving	84	₩12,690	+1.3%	₩1M ($740)
2025-12-31	BUY	PROGRAM	이상규 Lee Sang-gyu	moving	467	₩12,690	+1.3%	₩6M ($4K)
2025-12-31	BUY	PROGRAM	함정훈 Ham Jeong-hoon	moving	332	₩12,690	+1.3%	₩4M ($3K)
2025-06-04	BUY	콜옵션권리행사에따른주식취득	이중열 double row	Managing Director	2.6K	₩15,980	-19.6%	₩42M ($29K)
2025-02-27	BUY	Market Buy	박한오 Park Han-oh	CEO	3.0K	₩15,260	-15.8%	₩46M ($32K)
2025-01-21	BUY	Market Buy	변태진 Pervert Jin	Managing Director	1.6K	₩18,500	-30.5%	₩29M ($20K)
2024-07-19	BUY	콜옵션권리행사에따른주식취득	이삼용 Lee Sam-yong	moving	2.0K	₩34,850	-63.1%	₩70M ($48K)
2024-05-13	BUY	콜옵션권리행사에따른주식취득	이중열 double row	Managing Director	3.0K	₩30,400	-57.7%	₩91M ($63K)

Frequently asked questions

Who has been buying Bioneer stock?: 2 distinct insiders have filed 2 disclosed insider purchases in Bioneer (064550), most recently on 2026-01-28. 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 Bioneer have?: Bioneer has 2 buy-side and 0 sell-side disclosures on record, covering ₩75M ($52K) in total reported value, spanning 2024-05-13 to 2026-01-28.
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.