Who has been buying SY stock?

2 distinct insiders have filed 19 disclosed insider purchases in SY (109610), most recently on 2026-06-11. 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 have?

SY has 19 buy-side and 1 sell-side disclosures on record, covering ₩750M ($521K) in total reported value, spanning 2024-04-19 to 2026-06-11.

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.

SY 109610

Company

에스와이SY

Insiders

Buys

Total Value

₩750M ($521K)

Avg Return

-4.65%

Last Filing

2026-06-11

SY (109610) has 19 disclosed insider purchases and 1 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩750M ($521K) in reported transaction value. The earliest filing StockDrifts holds for SY is dated 2024-04-19; the most recent is 2026-06-11. Across these filings the average return since disclosure is -4.65%, 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
2026-06-11	BUY	Market Buy	홍성부 Hongseongbu	CEO	5.5K	-	-	-
2026-06-10	BUY	Market Buy	홍성부 Hongseongbu	CEO	105.3K	-	-	-
2026-06-09	BUY	Market Buy	홍성부 Hongseongbu	CEO	70.9K	-	-	-
2026-06-08	BUY	Market Buy	홍성부 Hongseongbu	CEO	72.7K	-	-	-
2026-06-05	BUY	Market Buy	홍성부 Hongseongbu	CEO	166.6K	-	-	-
2026-06-04	BUY	Market Buy	홍성부 Hongseongbu	CEO	26.4K	-	-	-
2025-09-25	BUY	Market Buy	홍성부 Hongseongbu	CEO	1.3K	₩3,395	-7.2%	₩5M ($3K)
2025-09-24	BUY	Market Buy	홍성부 Hongseongbu	CEO	7.0K	₩3,380	-6.8%	₩24M ($16K)
2025-09-23	BUY	Market Buy	홍성부 Hongseongbu	CEO	7.5K	₩3,355	-6.1%	₩25M ($17K)
2025-09-22	BUY	Market Buy	홍성부 Hongseongbu	CEO	3.7K	₩3,355	-6.1%	₩12M ($9K)
2025-09-19	BUY	Market Buy	홍성부 Hongseongbu	CEO	12.3K	₩3,385	-6.9%	₩42M ($29K)
2025-09-02	BUY	Market Buy	홍성부 Hongseongbu	CEO	4.8K	₩3,470	-9.2%	₩17M ($12K)
2025-09-01	BUY	Market Buy	홍성부 Hongseongbu	CEO	18.1K	₩3,465	-9.1%	₩63M ($44K)
2025-08-29	BUY	Market Buy	홍성부 Hongseongbu	CEO	47.9K	₩3,400	-7.3%	₩163M ($113K)
2025-08-28	BUY	Market Buy	홍성부 Hongseongbu	CEO	1.1K	₩3,355	-6.1%	₩4M ($3K)
2025-08-27	BUY	Market Buy	홍성부 Hongseongbu	CEO	8.4K	₩3,400	-7.3%	₩28M ($20K)
2025-08-26	BUY	Market Buy	홍성부 Hongseongbu	CEO	20.0K	₩3,375	-6.7%	₩68M ($47K)
2025-08-19	BUY	Market Buy	홍성부 Hongseongbu	CEO	26.6K	₩3,480	-9.5%	₩92M ($64K)
2025-08-14	BUY	Market Buy	홍성부 Hongseongbu	CEO	30.2K	₩3,475	-9.3%	₩105M ($73K)
2024-05-03	SELL	Market Sell	김대정 Daejeong Kim	Managing Director	-22.0K	₩4,680	+32.7%	₩103M ($72K)
2024-04-19	SELL	시간외매매	홍영돈 Youngdon Hong	Chairman	-1.0M	₩4,475	+29.6%	₩4.5B ($3.1M)

Frequently asked questions

Who has been buying SY stock?: 2 distinct insiders have filed 19 disclosed insider purchases in SY (109610), most recently on 2026-06-11. 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 have?: SY has 19 buy-side and 1 sell-side disclosures on record, covering ₩750M ($521K) in total reported value, spanning 2024-04-19 to 2026-06-11.
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.