Who has been buying Intron Bio stock?

2 distinct insiders have filed 7 disclosed insider purchases in Intron Bio (048530), most recently on 2026-06-08. 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 Intron Bio have?

Intron Bio has 7 buy-side and 0 sell-side disclosures on record, covering ₩701M ($487K) in total reported value, spanning 2025-01-02 to 2026-06-08.

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.

Intron Bio 048530

Company

인트론바이오Intron Bio

Insiders

Buys

Total Value

₩701M ($487K)

Avg Return

+13.97%

Last Filing

2026-06-08

Intron Bio (048530) has 7 disclosed insider purchases and 0 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩701M ($487K) in reported transaction value. The earliest filing StockDrifts holds for Intron Bio is dated 2025-01-02; the most recent is 2026-06-08. Across these filings the average return since disclosure is +13.97%, 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
2026-06-08	BUY	Market Buy	윤경원 Kyeong-won Yoon	CEO/Vice President	38.6K	-	-	-
2026-03-19	SELL	임원퇴임	전수연 Sooyeon Jeon	Sooyeon Jeon	-20.8K	₩4,610	+9.1%	₩96M ($67K)
2026-02-20	SELL	임원퇴임	설재구 Seol Jae-gu	Seol Jae-gu	-31.1K	₩3,640	-15.1%	₩113M ($78K)
2026-01-29	SELL	임원퇴임	김수진 Sujin Kim	Sujin Kim	-7.0K	₩4,020	-4.2%	₩28M ($20K)
2026-01-20	BUY	Market Buy	윤경원 Kyeong-won Yoon	CEO/Vice President	49.8K	₩3,055	+37.1%	₩152M ($106K)
2026-01-19	SELL	임원퇴임	강상현 Sanghyun Kang	vice president	-99.0K	₩2,915	-43.7%	₩288M ($200K)
2026-01-05	BUY	신규선임	손지수 Jisoo Son	moving	535	₩3,265	+28.3%	₩2M ($1K)
2025-12-17	SELL	장외매도	윤성준 Seongjun Yoon	CEO	-1.0M	₩3,480	-20.4%	₩3.5B ($2.4M)
2025-11-21	BUY	Market Buy	윤경원 Kyeong-won Yoon	CEO/Vice President	30.0K	₩3,730	+12.3%	₩112M ($78K)
2025-11-20	BUY	Market Buy	윤경원 Kyeong-won Yoon	CEO/Vice President	35.0K	₩3,790	+10.6%	₩133M ($92K)
2025-11-19	BUY	Market Buy	윤경원 Kyeong-won Yoon	CEO/Vice President	32.0K	₩3,655	+14.6%	₩117M ($81K)
2025-11-18	BUY	Market Buy	윤경원 Kyeong-won Yoon	CEO/Vice President	33.0K	₩3,665	+14.3%	₩121M ($84K)
2025-02-20	BUY	Market Buy	강상현 Sanghyun Kang	vice president	15.0K	₩4,420	-5.2%	₩66M ($46K)
2025-01-02	BUY	신규선임	김성우 Seongwoo Kim	moving	10.8K	₩5,600	-25.2%	₩61M ($42K)

Frequently asked questions

Who has been buying Intron Bio stock?: 2 distinct insiders have filed 7 disclosed insider purchases in Intron Bio (048530), most recently on 2026-06-08. 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 Intron Bio have?: Intron Bio has 7 buy-side and 0 sell-side disclosures on record, covering ₩701M ($487K) in total reported value, spanning 2025-01-02 to 2026-06-08.
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.