Who has been buying Bioinfrastructure stock?

3 distinct insiders have filed 6 disclosed insider purchases in Bioinfrastructure (199730), most recently on 2026-06-01. 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 Bioinfrastructure have?

Bioinfrastructure has 6 buy-side and 6 sell-side disclosures on record, covering ₩102M ($71K) in total reported value, spanning 2023-03-06 to 2026-06-01.

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.

Bioinfrastructure 199730

Company

바이오인프라Bioinfrastructure

Insiders

Buys

Total Value

₩102M ($71K)

Avg Return

-0.14%

Last Filing

2026-06-01

Bioinfrastructure (199730) has 6 disclosed insider purchases and 6 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩102M ($71K) in reported transaction value. The earliest filing StockDrifts holds for Bioinfrastructure is dated 2023-03-06; the most recent is 2026-06-01. Across these filings the average return since disclosure is -0.14%, 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
2026-06-01	BUY	Market Buy	이영국 Lee Young-guk	Managing Director	3.0K	₩3,255	-5.7%	₩10M ($7K)
2024-06-16	BUY	Market Buy	안형준 Hyeongjun Ahn	Outside Director	50	₩9,310	-52.3%	₩466K ($323)
2024-05-03	BUY	주식매수청구권 행사	황규상 Hwang Gyu-sang	Managing Director	22.5K	₩10,690	-58.4%	₩241M ($167K)
2024-05-03	BUY	주식매수청구권 행사	최윤호 Choi Yunho	Managing Director	7.5K	₩10,690	-58.4%	₩80M ($56K)
2024-04-03	SELL	Market Sell	황규상 Hwang Gyu-sang	Managing Director	-999	₩10,920	+59.3%	₩11M ($8K)
2024-04-01	SELL	Market Sell	황규상 Hwang Gyu-sang	Managing Director	-1.0K	₩11,290	+60.6%	₩11M ($8K)
2024-04-01	SELL	Market Sell	황규상 Hwang Gyu-sang	Managing Director	-3.0K	₩11,290	+60.6%	₩34M ($24K)
2024-03-29	SELL	Market Sell	황규상 Hwang Gyu-sang	Managing Director	-2.0K	₩11,170	+60.2%	₩22M ($16K)
2024-03-27	SELL	Market Sell	황규상 Hwang Gyu-sang	Managing Director	-500	₩11,000	+59.6%	₩6M ($4K)
2024-03-08	BUY	주식매수청구권 행사	박광규 Park Kwang-gyu	Managing Director	30.0K	₩10,890	-59.2%	₩327M ($227K)
2024-03-06	BUY	주식매수청구권 행사	황규상 Hwang Gyu-sang	Managing Director	7.5K	₩10,450	-57.5%	₩78M ($54K)
2023-07-07	SELL	Market Sell	안형준 Hyeongjun Ahn	Outside Director	-150	₩17,300	+74.3%	₩3M ($2K)
2023-06-02	BUY	Market Buy	안형준 Hyeongjun Ahn	Outside Director	60	₩19,360	-77.0%	₩1M ($807)
2023-06-01	BUY	Market Buy	안형준 Hyeongjun Ahn	Outside Director	40	₩19,610	-77.3%	₩784K ($545)
2023-05-04	BUY	Market Buy	안형준 Hyeongjun Ahn	Outside Director	60	₩22,750	-80.5%	₩1M ($948)
2023-03-06	BUY	Market Buy	안형준 Hyeongjun Ahn	Outside Director	60	₩27,050	-83.6%	₩2M ($1K)

Frequently asked questions

Who has been buying Bioinfrastructure stock?: 3 distinct insiders have filed 6 disclosed insider purchases in Bioinfrastructure (199730), most recently on 2026-06-01. 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 Bioinfrastructure have?: Bioinfrastructure has 6 buy-side and 6 sell-side disclosures on record, covering ₩102M ($71K) in total reported value, spanning 2023-03-06 to 2026-06-01.
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.