Who has been buying Kumho Petrochemical stock?

14 distinct insiders have filed 221 disclosed insider purchases in Kumho Petrochemical (011780), most recently on 2026-07-13. 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 Kumho Petrochemical have?

Kumho Petrochemical has 221 buy-side and 201 sell-side disclosures on record, covering ₩400.4B ($278.1M) in total reported value, spanning 2024-11-13 to 2026-07-13.

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.

Kumho Petrochemical 011780

Company

금호석유화학Kumho Petrochemical

Insiders

Buys

221

Total Value

₩400.4B ($278.1M)

Avg Return

+2.26%

Last Filing

2026-07-13

Kumho Petrochemical (011780) has 221 disclosed insider purchases and 201 disclosed disposals on record, filed by 14 distinct insiders. Together those filings cover ₩400.4B ($278.1M) in reported transaction value. The earliest filing StockDrifts holds for Kumho Petrochemical is dated 2024-11-13; the most recent is 2026-07-13. Across these filings the average return since disclosure is +2.26%, 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
2026-07-31	BUY	Market Buy	김태환 Taehwan Kim	Managing director treatment	40	₩114,400	+13.3%	₩4M ($3K)
2026-07-31	BUY	Market Buy	박주형 Park Joo-hyung	vice president	2.1K	₩114,400	+13.3%	₩232M ($161K)
2026-07-30	BUY	Market Buy	박주형 Park Joo-hyung	vice president	867	₩113,000	+14.7%	₩100M ($69K)
2026-07-30	BUY	신규선임	이효중 Hyojung Lee	Managing director treatment	123	₩113,000	+14.7%	₩14M ($10K)
2026-07-29	BUY	Market Buy	국민연금공단 National Pension Service	-	500	₩110,000	+4.0%	₩61M ($42K)
2026-07-29	SELL	Market Sell	국민연금공단 National Pension Service	-	-15.9K	₩110,000	-4.0%	₩1.9B ($1.3M)
2026-07-28	BUY	신규보고	국민연금공단 National Pension Service	-	251.7K	₩115,400	-0.9%	₩29.0B ($20.2M)
2026-07-28	BUY	신규주요주주	국민연금공단 National Pension Service	-	1.8K	₩115,400	-0.9%	₩223M ($155K)
2026-07-28	SELL	Market Sell	국민연금공단 National Pension Service	-	-39	₩115,400	+0.9%	₩5M ($3K)
2026-07-28	BUY	신규보고	국민연금공단 National Pension Service	-	2.5M	₩115,400	-0.9%	₩290.1B ($201.5M)
2026-07-13	BUY	Market Buy	김태환 Taehwan Kim	Managing director treatment	20	₩117,400	+6.0%	₩2M ($2K)
2026-07-13	BUY	Market Buy	박주형 Park Joo-hyung	vice president	899	₩117,400	+5.2%	₩100M ($69K)
2026-07-10	BUY	Market Buy	박주형 Park Joo-hyung	vice president	762	₩117,400	+5.2%	₩85M ($59K)
2026-07-10	BUY	Market Buy	여명구 Yeomyeong-gu	Managing Director	100	₩117,400	+5.2%	₩11M ($8K)
2026-07-08	BUY	Market Buy	박주형 Park Joo-hyung	vice president	224	₩112,500	+9.8%	₩25M ($18K)
2026-07-07	BUY	Market Buy	박주형 Park Joo-hyung	vice president	300	₩117,000	+5.6%	₩34M ($23K)
2026-07-02	BUY	Market Buy	박주형 Park Joo-hyung	vice president	300	₩116,900	-1.0%	₩35M ($24K)
2026-07-02	BUY	Market Buy	김동락 Kim Dong-rak	Managing director treatment	100	₩116,900	-4.3%	₩12M ($8K)
2026-06-30	BUY	Market Buy	박주형 Park Joo-hyung	vice president	500	₩113,300	+2.1%	₩57M ($39K)
2026-06-29	SELL	Market Sell	국민연금공단 National Pension Service	-	-23	₩120,000	+3.6%	₩3M ($2K)
2026-06-29	BUY	Market Buy	국민연금공단 National Pension Service	-	1.7K	₩120,000	-3.6%	₩200M ($139K)
2026-06-29	SELL	Market Sell	국민연금공단 National Pension Service	-	-33.9K	₩120,000	+3.6%	₩4.1B ($2.8M)
2026-06-26	BUY	신규보고	국민연금공단 National Pension Service	-	2.5M	₩113,900	+1.6%	₩284.3B ($197.4M)
2026-06-26	SELL	Market Sell	국민연금공단 National Pension Service	-	-2.5K	₩113,900	-1.6%	₩282M ($196K)
2026-06-26	BUY	신규주요주주	국민연금공단 National Pension Service	-	25.2K	₩113,900	+1.6%	₩2.9B ($2.0M)
2026-06-26	BUY	신규보고	국민연금공단 National Pension Service	-	251.8K	₩113,900	+1.6%	₩28.7B ($19.9M)
2026-06-25	BUY	Market Buy	김민호 Minho Kim	Managing Director	300	₩116,300	-0.5%	₩35M ($24K)
2026-06-25	BUY	Market Buy	박주형 Park Joo-hyung	vice president	1.0K	₩116,300	-0.5%	₩117M ($81K)
2026-06-24	BUY	Market Buy	박주형 Park Joo-hyung	vice president	200	₩121,300	-6.1%	₩24M ($17K)
2026-06-15	BUY	Market Buy	박주형 Park Joo-hyung	vice president	400	₩131,900	-13.7%	₩53M ($37K)
2026-06-12	BUY	Market Buy	박주형 Park Joo-hyung	vice president	600	-	-	-
2026-06-10	BUY	Market Buy	박주형 Park Joo-hyung	vice president	469	-	-	-
2026-06-09	BUY	Market Buy	박주형 Park Joo-hyung	vice president	200	-	-	-
2026-06-05	BUY	Market Buy	박주형 Park Joo-hyung	vice president	200	-	-	-
2026-05-28	SELL	Market Sell	국민연금공단 National Pension Service	-	-33.7K	₩135,800	+5.7%	₩4.6B ($3.2M)
2026-05-28	BUY	Market Buy	국민연금공단 National Pension Service	-	10.3K	₩135,800	-5.7%	₩1.4B ($967K)
2026-05-27	SELL	Market Sell	국민연금공단 National Pension Service	-	-2.6K	₩140,000	+8.5%	₩366M ($254K)
2026-05-26	BUY	신규보고	국민연금공단 National Pension Service	-	251.9K	₩149,700	-14.4%	₩37.7B ($26.2M)
2026-05-26	BUY	신규보고	국민연금공단 National Pension Service	-	2.5M	₩149,700	-14.4%	₩376.6B ($261.5M)
2026-05-26	BUY	신규주요주주	국민연금공단 National Pension Service	-	5.0K	₩149,700	-14.4%	₩749M ($520K)
2026-05-21	SELL	Market Sell	국민연금공단 National Pension Service	-	-10.0K	₩140,500	+3.4%	₩1.4B ($976K)
2026-05-20	SELL	Market Sell	국민연금공단 National Pension Service	-	-1.1K	₩131,400	-3.4%	₩149M ($103K)
2026-05-20	BUY	Market Buy	국민연금공단 National Pension Service	-	2.1K	₩131,400	+3.4%	₩279M ($194K)
2026-05-19	BUY	신규보고	국민연금공단 National Pension Service	-	2.5M	₩137,600	-1.3%	₩344.7B ($239.4M)
2026-05-19	BUY	신규주요주주	국민연금공단 National Pension Service	-	19.2K	₩137,600	-1.3%	₩2.6B ($1.8M)
2026-05-19	BUY	신규보고	국민연금공단 National Pension Service	-	251.9K	₩137,600	-1.3%	₩34.7B ($24.1M)
2026-04-07	SELL	Market Sell	국민연금공단 National Pension Service	-	-46.9K	₩123,500	-9.2%	₩5.8B ($4.0M)
2026-04-06	BUY	Market Buy	김영수 Youngsu Kim	Managing director treatment	10	₩120,900	+11.5%	₩1M ($840)
2026-04-06	SELL	Market Sell	국민연금공단 National Pension Service	-	-21.1K	₩120,900	-11.5%	₩2.5B ($1.8M)
2026-04-03	SELL	Market Sell	국민연금공단 National Pension Service	-	-34.5K	₩118,000	-14.2%	₩4.1B ($2.8M)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Kumho Petrochemical stock?: 14 distinct insiders have filed 221 disclosed insider purchases in Kumho Petrochemical (011780), most recently on 2026-07-13. 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 Kumho Petrochemical have?: Kumho Petrochemical has 221 buy-side and 201 sell-side disclosures on record, covering ₩400.4B ($278.1M) in total reported value, spanning 2024-11-13 to 2026-07-13.
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.