Who has been buying S-Oil stock?

4 distinct insiders have filed 0 disclosed insider purchases in S-Oil (010950), most recently on 2026-06-23. 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 S-Oil have?

S-Oil has 0 buy-side and 10 sell-side disclosures on record, covering ₩248M ($172K) in total reported value, spanning 2025-02-01 to 2026-06-23.

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.

S-Oil 010950

Company

S-Oil

Insiders

Buys

Total Value

₩248M ($172K)

Avg Return

-11.24%

Last Filing

2026-06-23

S-Oil (010950) has 0 disclosed insider purchases and 10 disclosed disposals on record, filed by 4 distinct insiders. Together those filings cover ₩248M ($172K) in reported transaction value. The earliest filing StockDrifts holds for S-Oil is dated 2025-02-01; the most recent is 2026-06-23. Across these filings the average return since disclosure is -11.24%, 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
2026-09-08	SELL	Market Sell	국민연금공단 National Pension Service	-	-19.3K	₩159,400	+7.6%	₩3.1B ($2.1M)
2026-09-08	BUY	신규주요주주	국민연금공단 National Pension Service	-	98.0K	₩159,400	-7.6%	₩15.7B ($10.9M)
2026-09-08	BUY	신규보고	국민연금공단 National Pension Service	-	27.4K	₩159,400	-7.6%	₩4.4B ($3.0M)
2026-09-08	BUY	신규보고	국민연금공단 National Pension Service	-	11.2M	₩159,400	-7.6%	₩1.8T ($1.2B)
2026-08-24	BUY	Market Buy	국민연금공단 National Pension Service	-	7.6K	₩141,200	+5.7%	₩1.1B ($767K)
2026-08-24	SELL	Market Sell	국민연금공단 National Pension Service	-	-54.3K	₩141,200	-5.7%	₩7.8B ($5.4M)
2026-08-21	BUY	신규보고	국민연금공단 National Pension Service	-	11.2M	₩141,100	+5.7%	₩1.6T ($1.1B)
2026-08-21	BUY	신규주요주주	국민연금공단 National Pension Service	-	76.3K	₩141,100	+5.7%	₩11.8B ($8.2M)
2026-08-21	BUY	신규보고	국민연금공단 National Pension Service	-	27.4K	₩141,100	+5.7%	₩3.9B ($2.7M)
2026-06-23	SELL	Market Sell	정영광 Yeonggwang Jeong	general manager	-50	₩101,500	-31.5%	₩5M ($4K)
2026-05-13	SELL	Market Sell	정영광 Yeonggwang Jeong	general manager	-50	₩115,300	-15.8%	₩6M ($4K)
2026-03-06	SELL	Market Sell	류열 Ryu Yeol	president	-1.6K	-	-	-
2026-03-06	SELL	Market Sell	이종협 Jonghyup Lee	Managing Director	-700	-	-	-
2026-02-24	SELL	Market Sell	이현민 Hyunmin Lee	Assistant Managing Director	-500	₩114,100	+0.3%	₩57M ($40K)
2026-02-24	SELL	Market Sell	정영광 Yeonggwang Jeong	general manager	-100	₩114,100	-17.7%	₩11M ($8K)
2026-02-23	SELL	Market Sell	이현민 Hyunmin Lee	Assistant Managing Director	-870	₩114,500	+0.7%	₩100M ($69K)
2026-02-19	SELL	Market Sell	이현민 Hyunmin Lee	Assistant Managing Director	-130	₩110,900	-2.5%	₩14M ($10K)
2026-02-13	SELL	Market Sell	이현민 Hyunmin Lee	Assistant Managing Director	-100	₩106,200	-7.1%	₩11M ($7K)
2026-02-03	SELL	Market Sell	이현민 Hyunmin Lee	Assistant Managing Director	-450	₩97,700	-16.4%	₩44M ($31K)
2025-08-01	BUY	신규선임	이현민 Hyunmin Lee	Assistant Managing Director	5.5K	₩60,300	+88.6%	₩335M ($232K)
2025-03-01	BUY	신규선임	김승후 Seunghoo Kim	Assistant Managing Director	365	₩55,700	+104.1%	₩20M ($14K)
2025-03-01	BUY	신규선임	김승후 Seunghoo Kim	Assistant Managing Director	447	₩55,700	+104.1%	₩25M ($17K)
2025-02-01	BUY	신규선임	허성훈 Seonghun Heo	Assistant Managing Director	300	₩60,300	+88.6%	₩18M ($13K)

Frequently asked questions

Who has been buying S-Oil stock?: 4 distinct insiders have filed 0 disclosed insider purchases in S-Oil (010950), most recently on 2026-06-23. 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 S-Oil have?: S-Oil has 0 buy-side and 10 sell-side disclosures on record, covering ₩248M ($172K) in total reported value, spanning 2025-02-01 to 2026-06-23.
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.