Who has been buying Precision Bio stock?

1 distinct insiders have filed 4 disclosed insider purchases in Precision Bio (335810), most recently on 2026-02-04. 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 Precision Bio have?

Precision Bio has 4 buy-side and 0 sell-side disclosures on record, covering ₩107M ($74K) in total reported value, spanning 2024-10-02 to 2026-02-04.

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.

Precision Bio 335810

Company

프리시젼바이오Precision Bio

Insiders

Buys

Total Value

₩107M ($74K)

Avg Return

-12.44%

Last Filing

2026-02-04

Precision Bio (335810) has 4 disclosed insider purchases and 0 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩107M ($74K) in reported transaction value. The earliest filing StockDrifts holds for Precision Bio is dated 2024-10-02; the most recent is 2026-02-04. Across these filings the average return since disclosure is -12.44%, 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
2026-02-04	BUY	합병	황규연 Hwang Gyu-yeon	Managing Director	350.0K	₩2,640	+1.5%	₩924M ($642K)
2026-02-04	BUY	합병	광동제약 Kwangdong Pharmaceutical	-	1.2M	₩2,640	+1.5%	₩3.2B ($2.2M)
2026-02-04	BUY	합병	민준홍 Min Junhong	Managing Director	978.0K	₩2,640	+1.5%	₩2.6B ($1.8M)
2026-02-01	BUY	신규보고	황규연 Hwang Gyu-yeon	Managing Director	31.0K	₩2,600	+3.1%	₩81M ($56K)
2025-11-04	BUY	제3자배정유상증자	광동제약 Kwangdong Pharmaceutical	-	6.3M	₩2,760	-2.9%	₩17.5B ($12.2M)
2025-07-31	BUY	Market Buy	광동제약 Kwangdong Pharmaceutical	-	5.0K	₩3,100	-13.6%	₩16M ($11K)
2025-07-30	BUY	Market Buy	광동제약 Kwangdong Pharmaceutical	-	8.8K	₩2,990	-10.4%	₩26M ($18K)
2025-07-29	BUY	Market Buy	광동제약 Kwangdong Pharmaceutical	-	10.1K	₩3,070	-12.7%	₩31M ($21K)
2025-07-28	BUY	Market Buy	광동제약 Kwangdong Pharmaceutical	-	11.1K	₩3,085	-13.1%	₩34M ($24K)
2024-10-02	BUY	CB인수	아이센스 i-sense	-	108.8K	₩3,460	-22.5%	₩377M ($262K)
2024-10-02	BUY	장외매수	광동제약 Kwangdong Pharmaceutical	-	3.4M	₩3,460	-22.5%	₩11.9B ($8.3M)
2024-10-02	BUY	CB인수	아이센스 i-sense	-	217.7K	₩3,460	-22.5%	₩753M ($523K)
2024-10-02	BUY	CB인수	아이센스 i-sense	-	217.7K	₩3,460	-22.5%	₩753M ($523K)
2024-10-02	SELL	장외매도	아이센스 i-sense	-	-3.3M	₩3,460	+22.5%	₩11.3B ($7.9M)

Frequently asked questions

Who has been buying Precision Bio stock?: 1 distinct insiders have filed 4 disclosed insider purchases in Precision Bio (335810), most recently on 2026-02-04. 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 Precision Bio have?: Precision Bio has 4 buy-side and 0 sell-side disclosures on record, covering ₩107M ($74K) in total reported value, spanning 2024-10-02 to 2026-02-04.
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.