Who has been buying T&R Biofab stock?

5 distinct insiders have filed 16 disclosed insider purchases in T&R Biofab (246710), most recently on 2026-07-13. 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 T&R Biofab have?

T&R Biofab has 16 buy-side and 77 sell-side disclosures on record, covering ₩4.4B ($3.1M) in total reported value, spanning 2024-01-11 to 2026-07-13.

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.

T&R Biofab 246710

Company

티앤알바이오팹T&R Biofab

Insiders

Buys

Total Value

₩4.4B ($3.1M)

Avg Return

+19.39%

Last Filing

2026-07-13

T&R Biofab (246710) has 16 disclosed insider purchases and 77 disclosed disposals on record, filed by 5 distinct insiders. Together those filings cover ₩4.4B ($3.1M) in reported transaction value. The earliest filing StockDrifts holds for T&R Biofab is dated 2024-01-11; the most recent is 2026-07-13. Across these filings the average return since disclosure is +19.39%, 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
2026-08-03	BUY	Market Buy	김현정 Hyunjeong Kim	Managing Director	3.6K	₩2,705	+3.3%	₩10M ($7K)
2026-07-31	BUY	Market Buy	김현정 Hyunjeong Kim	Managing Director	20.0K	₩3,000	-6.8%	₩50M ($35K)
2026-07-31	BUY	기타	심진형 Shim Jinhyung	moving	300.8K	₩3,000	-6.8%	₩902M ($627K)
2026-07-31	SELL	기타	윤원수 Wonsoo Yoon	CEO	-300.8K	₩3,000	+6.8%	₩902M ($627K)
2026-07-13	SELL	장외매도	윤원수 Wonsoo Yoon	CEO	-936.8K	₩2,000	-4.0%	₩2.0B ($1.4M)
2026-07-13	BUY	차입	윤원수 Wonsoo Yoon	CEO	300.8K	₩2,000	+4.0%	₩602M ($418K)
2026-07-13	SELL	대여	심진형 Shim Jinhyung	moving	-300.8K	₩2,000	-4.0%	₩602M ($418K)
2026-06-30	BUY	Market Buy	김현정 Hyunjeong Kim	Managing Director	20.0K	₩2,065	+13.3%	₩41M ($29K)
2026-06-05	BUY	Market Buy	김현정 Hyunjeong Kim	Managing Director	1.5K	₩2,155	-2.5%	₩3M ($2K)
2026-06-04	BUY	Market Buy	김현정 Hyunjeong Kim	Managing Director	6.0K	₩2,070	+1.4%	₩12M ($9K)
2026-06-02	BUY	Market Buy	김현정 Hyunjeong Kim	Managing Director	7.0K	₩2,080	+1.0%	₩15M ($10K)
2026-04-14	SELL	전환권등소멸	진송완 Songwan Jin	moving	-5.0K	₩3,250	+2.1%	₩16M ($11K)
2026-04-14	SELL	전환권등소멸	심주성 Shim Joo-seong	vice president	-12.0K	₩3,250	+2.1%	₩39M ($27K)
2026-04-14	SELL	전환권등소멸	김영필 Youngpil Kim	Managing Director	-5.0K	₩3,250	+2.1%	₩16M ($11K)
2026-04-14	SELL	전환권등소멸	조은경 Jo Eun-kyung	moving	-4.0K	₩3,250	+2.1%	₩13M ($9K)
2026-04-14	SELL	전환권등소멸	김현정 Hyunjeong Kim	Managing Director	-5.0K	₩3,250	+2.1%	₩16M ($11K)
2026-04-14	SELL	전환권등소멸	심진형 Shim Jinhyung	moving	-11.0K	₩3,250	+2.1%	₩36M ($25K)
2026-04-14	SELL	전환권등소멸	박영준 Youngjun Park	Managing Director	-5.0K	₩3,250	+2.1%	₩16M ($11K)
2026-04-14	SELL	전환권등소멸	정승교 Jeong Seung-kyo	Managing Director	-10.0K	₩3,250	+2.1%	₩33M ($23K)
2026-04-14	BUY	PROGRAM	정승교 Jeong Seung-kyo	Managing Director	10.0K	₩3,250	-2.1%	₩33M ($23K)
2026-04-14	BUY	PROGRAM	윤원수 Wonsoo Yoon	CEO	32.5K	₩3,250	-2.1%	₩105M ($73K)
2026-04-14	BUY	PROGRAM	진송완 Songwan Jin	moving	5.0K	₩3,250	-2.1%	₩16M ($11K)
2026-04-14	BUY	PROGRAM	심주성 Shim Joo-seong	vice president	12.0K	₩3,250	-2.1%	₩39M ($27K)
2026-04-14	BUY	PROGRAM	김영필 Youngpil Kim	Managing Director	5.0K	₩3,250	-2.1%	₩16M ($11K)
2026-04-14	BUY	PROGRAM	조은경 Jo Eun-kyung	moving	4.0K	₩3,250	-2.1%	₩13M ($9K)
2026-04-14	BUY	PROGRAM	김현정 Hyunjeong Kim	Managing Director	5.0K	₩3,250	-2.1%	₩16M ($11K)
2026-04-14	BUY	PROGRAM	심진형 Shim Jinhyung	moving	11.0K	₩3,250	-2.1%	₩36M ($25K)
2026-04-14	BUY	PROGRAM	박영준 Youngjun Park	Managing Director	5.0K	₩3,250	-2.1%	₩16M ($11K)
2026-04-14	SELL	전환권등소멸	윤원수 Wonsoo Yoon	CEO	-32.5K	₩3,250	+2.1%	₩105M ($73K)
2026-02-02	BUY	PROGRAM	심진형 Shim Jinhyung	moving	11.0K	₩3,135	+4.2%	₩34M ($24K)
2026-02-02	BUY	PROGRAM	조은경 Jo Eun-kyung	moving	4.0K	₩3,135	+4.2%	₩13M ($9K)
2026-02-02	BUY	PROGRAM	김현정 Hyunjeong Kim	Managing Director	5.0K	₩3,135	+4.2%	₩16M ($11K)
2026-02-02	BUY	PROGRAM	김영필 Youngpil Kim	Managing Director	5.0K	₩3,135	+4.2%	₩16M ($11K)
2026-02-02	BUY	PROGRAM	박영준 Youngjun Park	Managing Director	5.0K	₩3,135	+4.2%	₩16M ($11K)
2026-02-02	BUY	PROGRAM	심주성 Shim Joo-seong	vice president	12.0K	₩3,135	+4.2%	₩38M ($26K)
2026-02-02	BUY	PROGRAM	윤원수 Wonsoo Yoon	CEO	32.5K	₩3,135	+4.2%	₩102M ($71K)
2026-02-02	BUY	PROGRAM	정승교 Jeong Seung-kyo	Managing Director	10.0K	₩3,135	+4.2%	₩31M ($22K)
2026-02-02	BUY	PROGRAM	진송완 Songwan Jin	moving	5.0K	₩3,135	+4.2%	₩16M ($11K)
2025-11-10	BUY	PROGRAM	NOBREGA MARINHO PAULO ANDRE	moving	1.4K	₩1,285	+154.1%	₩2M ($1K)
2025-10-30	BUY	PROGRAM	윤원수 Wonsoo Yoon	CEO	848.1K	₩1,866	+75.0%	₩1.6B ($1.1M)
2025-10-30	BUY	PROGRAM	진송완 Songwan Jin	moving	49.2K	₩1,866	+75.0%	₩92M ($64K)
2025-10-30	BUY	PROGRAM	정승교 Jeong Seung-kyo	Managing Director	18.0K	₩1,866	+75.0%	₩34M ($23K)
2025-10-30	BUY	PROGRAM	심주성 Shim Joo-seong	vice president	19.2K	₩1,866	+75.0%	₩36M ($25K)
2025-10-30	BUY	PROGRAM	심진형 Shim Jinhyung	moving	280.1K	₩1,866	+75.0%	₩523M ($363K)
2025-10-30	BUY	PROGRAM	김현정 Hyunjeong Kim	Managing Director	9.5K	₩1,866	+75.0%	₩18M ($12K)
2025-10-30	BUY	PROGRAM	조은경 Jo Eun-kyung	moving	5.4K	₩1,866	+75.0%	₩10M ($7K)
2025-10-30	BUY	PROGRAM	김영필 Youngpil Kim	Managing Director	8.5K	₩1,866	+75.0%	₩16M ($11K)
2025-10-30	BUY	PROGRAM	NOBREGA MARINHO PAULO ANDRE	moving	678	₩1,866	+75.0%	₩1M ($879)
2025-10-29	BUY	유상신주취득	윤원수 Wonsoo Yoon	CEO	1.1M	₩1,950	+67.4%	₩2.1B ($1.4M)
2025-10-29	BUY	유상신주취득	진송완 Songwan Jin	moving	49.8K	₩1,950	+67.4%	₩97M ($67K)

Showing the 50 most recent of 168 filings.

Frequently asked questions

Who has been buying T&R Biofab stock?: 5 distinct insiders have filed 16 disclosed insider purchases in T&R Biofab (246710), most recently on 2026-07-13. 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 T&R Biofab have?: T&R Biofab has 16 buy-side and 77 sell-side disclosures on record, covering ₩4.4B ($3.1M) in total reported value, spanning 2024-01-11 to 2026-07-13.
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.