Who has been buying SY Steeltech stock?

6 distinct insiders have filed 0 disclosed insider purchases in SY Steeltech (365330), most recently on 2026-05-15. 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 SY Steeltech have?

SY Steeltech has 0 buy-side and 11 sell-side disclosures on record, covering ₩13.0B ($9.0M) in total reported value, spanning 2024-07-09 to 2026-05-15.

Where does StockDrifts get SY Steeltech 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.

SY Steeltech 365330

Company

에스와이스틸텍SY Steeltech

Insiders

Buys

Total Value

₩13.0B ($9.0M)

Avg Return

+8.22%

Last Filing

2026-05-15

SY Steeltech (365330) has 0 disclosed insider purchases and 11 disclosed disposals on record, filed by 6 distinct insiders. Together those filings cover ₩13.0B ($9.0M) in reported transaction value. The earliest filing StockDrifts holds for SY Steeltech is dated 2024-07-09; the most recent is 2026-05-15. 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 +8.22%, 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
2026-05-15	SELL	시간외매매	홍영돈 Youngdon Hong	Chairman	-3.0M	₩3,270	+8.3%	₩9.8B ($6.8M)
2025-09-15	BUY	무상신주취득	에스와이 SY	-	1.5M	₩4,265	-8.3%	₩6.2B ($4.3M)
2025-09-15	BUY	무상신주취득	홍영돈 Youngdon Hong	Chairman	404.0K	₩4,265	-8.3%	₩1.7B ($1.2M)
2025-09-12	BUY	유상신주취득	에스와이 SY	-	2.4M	₩4,250	-8.0%	₩10.2B ($7.1M)
2025-09-12	SELL	기타	에스와이 SY	-	-2.4M	₩4,250	+8.0%	₩10.2B ($7.1M)
2025-08-27	SELL	Market Sell	에스와이 SY	-	-240.0K	₩4,426	+11.7%	₩1.1B ($738K)
2025-08-26	SELL	Market Sell	에스와이 SY	-	-903.5K	₩4,722	+17.2%	₩4.3B ($3.0M)
2025-08-26	SELL	Market Sell	홍영돈 Youngdon Hong	Chairman	-96.0K	₩4,722	+17.2%	₩453M ($315K)
2025-08-25	SELL	Market Sell	에스와이 SY	-	-783.2K	₩4,622	+15.4%	₩3.6B ($2.5M)
2025-08-25	SELL	Market Sell	홍영돈 Youngdon Hong	Chairman	-370.2K	₩4,622	+15.4%	₩1.7B ($1.2M)
2025-08-22	SELL	Market Sell	홍영돈 Youngdon Hong	Chairman	-13.5K	₩4,658	+16.1%	₩63M ($44K)
2025-08-22	SELL	Market Sell	에스와이 SY	-	-166.3K	₩4,658	+16.1%	₩775M ($538K)
2025-08-18	SELL	기타	홍영돈 Youngdon Hong	Chairman	-1.5M	₩5,022	+22.1%	₩7.5B ($5.2M)
2025-08-18	SELL	기타	에스와이 SY	-	-1.5M	₩5,022	+22.1%	₩7.5B ($5.2M)
2025-08-11	BUY	기타	에스와이 SY	-	6.0M	₩5,231	-25.3%	₩31.3B ($21.8M)
2025-08-11	BUY	기타	홍영돈 Youngdon Hong	Chairman	2.0M	₩5,231	-25.3%	₩10.4B ($7.2M)
2025-01-22	SELL	시간외매매	에스와이 SY	-	-3.0M	₩6,862	+43.0%	₩20.6B ($14.3M)
2024-12-05	SELL	Market Sell	나경욱 Na Kyung-wook	moving	-55.6K	₩5,708	+31.5%	₩317M ($220K)
2024-12-02	SELL	Market Sell	조승제 Seungje Cho	moving	-39.5K	₩6,219	+37.1%	₩246M ($171K)
2024-07-18	SELL	Market Sell	이병호 Lee Byung-ho	Managing Director	-60.0K	₩3,352	-16.6%	₩201M ($140K)
2024-07-09	SELL	Market Sell	홍성균 Seonggyun Hong	CEO	-120.0K	₩2,293	-70.5%	₩275M ($191K)

Frequently asked questions

Who has been buying SY Steeltech stock?: 6 distinct insiders have filed 0 disclosed insider purchases in SY Steeltech (365330), most recently on 2026-05-15. 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 SY Steeltech have?: SY Steeltech has 0 buy-side and 11 sell-side disclosures on record, covering ₩13.0B ($9.0M) in total reported value, spanning 2024-07-09 to 2026-05-15.
Where does StockDrifts get SY Steeltech 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 SY Steeltech. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.