Who has been buying Top Material stock?

3 distinct insiders have filed 6 disclosed insider purchases in Top Material (360070), 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 Top Material have?

Top Material has 6 buy-side and 1 sell-side disclosures on record, covering ₩887M ($616K) in total reported value, spanning 2024-03-15 to 2026-06-01.

Where does StockDrifts get Top Material 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.

Top Material 360070

Company

탑머티리얼Top Material

Insiders

Buys

Total Value

₩887M ($616K)

Avg Return

-21.49%

Last Filing

2026-06-01

Top Material (360070) has 6 disclosed insider purchases and 1 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩887M ($616K) in reported transaction value. The earliest filing StockDrifts holds for Top Material is dated 2024-03-15; the most recent is 2026-06-01. 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 -21.49%, 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	주식매수선택권	정태균 Tae-gyun Jeong	Managing Director	4.0K	₩13,020	-6.3%	₩52M ($36K)
2026-05-06	BUY	주식매수선택권	김상윤 Kim Sang-yoon	Managing Director	1.8K	₩19,680	-19.8%	₩35M ($25K)
2026-04-01	BUY	주식매수선택권	정태균 Tae-gyun Jeong	Managing Director	2.0K	₩18,100	+14.4%	₩36M ($25K)
2026-03-03	BUY	주식매수선택권	송철호 Song Cheol-ho	Managing Director	600	-	-	-
2026-02-02	BUY	주식매수선택권	홍승준 Seungjun Hong	Managing Director	6.0K	₩22,050	-7.7%	₩132M ($92K)
2025-05-02	BUY	주식매수선택권	조주성 Jo Joo-seong	Managing Director	4.5K	₩27,450	-25.9%	₩124M ($86K)
2025-04-02	BUY	Market Buy	전영태 Youngtae Jeon	Managing Director	766	₩24,600	-17.3%	₩19M ($13K)
2025-04-01	BUY	주식매수선택권	홍승준 Seungjun Hong	Managing Director	6.0K	₩25,600	-20.5%	₩154M ($107K)
2025-04-01	BUY	주식매수선택권	정태균 Tae-gyun Jeong	Managing Director	6.0K	₩25,600	-20.5%	₩154M ($107K)
2025-03-07	BUY	PROGRAM	김상윤 Kim Sang-yoon	Managing Director	17.9K	₩32,800	-38.0%	₩587M ($408K)
2025-03-07	BUY	PROGRAM	조주성 Jo Joo-seong	Managing Director	4.0K	₩32,800	-38.0%	₩131M ($91K)
2025-03-07	BUY	PROGRAM	전영태 Youngtae Jeon	Managing Director	3.5K	₩32,800	-38.0%	₩116M ($80K)
2025-03-07	BUY	PROGRAM	김재윤 Jaeyoon Kim	Managing Director	396	₩32,800	-38.0%	₩13M ($9K)
2025-03-07	BUY	PROGRAM	송철호 Song Cheol-ho	Managing Director	14.6K	₩32,800	-38.0%	₩479M ($333K)
2025-03-07	BUY	PROGRAM	이호철 Lee Ho-cheol	Managing Director	63	₩32,800	-38.0%	₩2M ($1K)
2025-02-26	SELL	Market Sell	전우진 Woojin Jeon	Managing Director	-24.7K	₩34,500	+41.0%	₩851M ($591K)
2024-12-24	BUY	Market Buy	정태균 Tae-gyun Jeong	Managing Director	100	₩27,050	-24.8%	₩3M ($2K)
2024-12-05	BUY	Market Buy	정태균 Tae-gyun Jeong	Managing Director	100	₩26,850	-24.2%	₩3M ($2K)
2024-11-01	BUY	Market Buy	정태균 Tae-gyun Jeong	Managing Director	100	₩34,700	-41.4%	₩3M ($2K)
2024-10-24	BUY	Market Buy	정태균 Tae-gyun Jeong	Managing Director	100	₩33,350	-39.0%	₩3M ($2K)
2024-09-20	BUY	Market Buy	정태균 Tae-gyun Jeong	Managing Director	150	₩36,900	-44.9%	₩6M ($4K)
2024-06-05	SELL	증여	정태균 Tae-gyun Jeong	Managing Director	-8.0K	₩55,000	+63.0%	₩440M ($306K)
2024-06-03	BUY	주식매수선택권	정태균 Tae-gyun Jeong	Managing Director	2.0K	₩50,000	-59.3%	₩100M ($69K)
2024-04-15	BUY	주식매수선택권	정태균 Tae-gyun Jeong	Managing Director	2.0K	₩60,900	-66.6%	₩122M ($85K)
2024-04-01	BUY	주식매수선택권	정태균 Tae-gyun Jeong	Managing Director	4.0K	₩70,400	-71.1%	₩282M ($196K)
2024-03-15	BUY	주식매수선택권	정종모 Jeong Jong-mo	Managing Director	10.0K	₩70,000	-70.9%	₩700M ($486K)

Frequently asked questions

Who has been buying Top Material stock?: 3 distinct insiders have filed 6 disclosed insider purchases in Top Material (360070), 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 Top Material have?: Top Material has 6 buy-side and 1 sell-side disclosures on record, covering ₩887M ($616K) in total reported value, spanning 2024-03-15 to 2026-06-01.
Where does StockDrifts get Top Material 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 Top Material. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.