Who has been buying T Scientific stock?

6 distinct insiders have filed 29 disclosed insider purchases in T Scientific (057680), most recently on 2026-06-13. 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 Scientific have?

T Scientific has 29 buy-side and 0 sell-side disclosures on record, covering ₩616M ($428K) in total reported value, spanning 2022-02-04 to 2026-06-13.

Where does StockDrifts get T Scientific insider data?

From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

T Scientific 057680

Company

티사이언티픽T Scientific

Insiders

Buys

Total Value

₩616M ($428K)

Avg Return

-32.36%

Last Filing

2026-06-13

T Scientific (057680) has 29 disclosed insider purchases and 0 disclosed disposals on record, filed by 6 distinct insiders. Together those filings cover ₩616M ($428K) in reported transaction value. The earliest filing StockDrifts holds for T Scientific is dated 2022-02-04; the most recent is 2026-06-13. All of it is parsed from DART D001/D002 insider disclosures, the official disclosure system operated by the Financial Supervisory Service (Korea). Across these filings the average return since disclosure is -32.36%, 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
2026-06-13	BUY	제3자배정유상증자	제이에스아이홀딩스 JSI Holdings	-	1.5M	₩2,210	-11.4%	₩3.4B ($2.4M)
2026-04-20	SELL	자본감소	제이에스아이홀딩스 JSI Holdings	-	-1.1M	₩619	-216.3%	₩662M ($460K)
2026-04-14	SELL	자본감소	김봉근 Kim Bong-geun	moving	-8.0K	₩619	+0.0%	₩5M ($3K)
2026-04-14	SELL	자본감소	위지트 widget	-	-17.5M	₩619	+0.0%	₩10.9B ($7.5M)
2026-04-14	SELL	자본감소	김상우 Sangwoo Kim	CEO	-57.4K	₩619	+0.0%	₩36M ($25K)
2026-04-14	SELL	자본감소	양승환 Seunghwan Yang	Internal director	-64.0K	₩619	+0.0%	₩40M ($28K)
2026-04-14	SELL	자본감소	유승재 Seungjae Yoo	CEO	-58.6K	₩619	+0.0%	₩36M ($25K)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	600	₩773	-14.9%	₩464K ($322)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	100	₩773	-14.9%	₩77K ($54)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	600	₩773	-14.9%	₩464K ($322)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	300	₩773	-14.9%	₩232K ($161)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	200	₩773	-14.9%	₩155K ($107)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	300	₩773	-14.9%	₩232K ($161)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	500	₩773	-14.9%	₩387K ($268)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	100	₩773	-14.9%	₩77K ($54)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	3.3K	₩773	-14.9%	₩3M ($2K)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	1.7K	₩773	-14.9%	₩1M ($900)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	500	₩773	-14.9%	₩387K ($268)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	100	₩773	-14.9%	₩77K ($54)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	100	₩773	-14.9%	₩77K ($54)
2025-12-11	BUY	Market Buy	김봉근 Kim Bong-geun	moving	600	₩773	-14.9%	₩464K ($322)
2025-12-10	BUY	Market Buy	김봉근 Kim Bong-geun	moving	1.0K	₩766	-14.1%	₩766K ($532)
2024-05-24	BUY	Market Buy	위지트 widget	-	28.7K	₩1,314	-49.9%	₩38M ($26K)
2024-05-23	BUY	Market Buy	위지트 widget	-	105.1K	₩1,348	-51.2%	₩142M ($98K)
2024-05-22	BUY	Market Buy	양승환 Seunghwan Yang	Internal director	10.0K	₩1,339	-50.9%	₩13M ($9K)
2024-05-22	BUY	Market Buy	유승재 Seungjae Yoo	CEO	58.5K	₩1,339	-50.9%	₩78M ($54K)
2024-05-22	BUY	Market Buy	위지트 widget	-	86.1K	₩1,339	-50.9%	₩115M ($80K)
2024-05-21	BUY	Market Buy	양승환 Seunghwan Yang	Internal director	30.3K	₩1,445	-54.5%	₩44M ($30K)
2024-05-21	BUY	Market Buy	김상우 Sangwoo Kim	CEO	9.1K	₩1,445	-54.5%	₩13M ($9K)
2024-05-21	BUY	Market Buy	유승재 Seungjae Yoo	CEO	8.8K	₩1,445	-54.5%	₩13M ($9K)
2024-05-20	BUY	Market Buy	유승재 Seungjae Yoo	CEO	1.0K	₩1,406	-53.2%	₩1M ($976)
2024-05-20	BUY	Market Buy	김상우 Sangwoo Kim	CEO	62.6K	₩1,406	-53.2%	₩88M ($61K)
2024-05-20	BUY	Market Buy	양승환 Seunghwan Yang	Internal director	29.7K	₩1,406	-53.2%	₩42M ($29K)
2024-05-17	BUY	Market Buy	유승재 Seungjae Yoo	CEO	5.0K	₩1,415	-53.5%	₩7M ($5K)
2024-05-17	BUY	Market Buy	양승환 Seunghwan Yang	Internal director	10.0K	₩1,415	-53.5%	₩14M ($10K)
2024-04-25	BUY	제3자배정유상증자	위지트 widget	-	2.7M	₩1,180	-44.2%	₩3.2B ($2.2M)
2023-11-24	BUY	Market Buy	제이에스아이홀딩스 JSI Holdings	-	5.3K	-	-	-
2023-09-22	BUY	전환사채의권리행사	제이에스아이홀딩스 JSI Holdings	-	51.3K	-	-	-
2022-02-04	BUY	신주인수권사채의권리행사	제이에스아이홀딩스 JSI Holdings	-	332.6K	-	-	-

Frequently asked questions

Who has been buying T Scientific stock?: 6 distinct insiders have filed 29 disclosed insider purchases in T Scientific (057680), most recently on 2026-06-13. 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 Scientific have?: T Scientific has 29 buy-side and 0 sell-side disclosures on record, covering ₩616M ($428K) in total reported value, spanning 2022-02-04 to 2026-06-13.
Where does StockDrifts get T Scientific insider data?: From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Source filings

Every trade listed above is disclosed in DART D001/D002 insider disclosures, filed with the Financial Supervisory Service (Korea). View the original DART filings for T Scientific. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.