Who has been buying Poongsan stock?

10 distinct insiders have filed 137 disclosed insider purchases in Poongsan (103140), most recently on 2026-06-10. 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 Poongsan have?

Poongsan has 137 buy-side and 113 sell-side disclosures on record, covering ₩148.6B ($103.2M) in total reported value, spanning 2024-01-02 to 2026-06-10.

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.

Poongsan 103140

Company

풍산Poongsan

Insiders

Buys

137

Total Value

₩148.6B ($103.2M)

Avg Return

+6.43%

Last Filing

2026-06-10

Poongsan (103140) has 137 disclosed insider purchases and 113 disclosed disposals on record, filed by 10 distinct insiders. Together those filings cover ₩148.6B ($103.2M) in reported transaction value. The earliest filing StockDrifts holds for Poongsan is dated 2024-01-02; the most recent is 2026-06-10. Across these filings the average return since disclosure is +6.43%, 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
2026-09-10	BUY	Market Buy	박우동 Park Woo-dong	vice president	61	₩78,800	-3.0%	₩5M ($3K)
2026-08-12	BUY	Market Buy	박우동 Park Woo-dong	vice president	56	₩82,200	-7.1%	₩5M ($3K)
2026-08-12	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	28	₩82,200	-0.2%	₩2M ($2K)
2026-07-10	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	37	₩65,100	+26.0%	₩2M ($2K)
2026-07-10	BUY	Market Buy	박우동 Park Woo-dong	vice president	75	₩65,100	+17.4%	₩5M ($3K)
2026-06-10	BUY	Market Buy	박우동 Park Woo-dong	vice president	72	₩70,100	+7.7%	₩5M ($4K)
2026-06-10	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	36	₩70,100	+17.0%	₩2M ($2K)
2026-05-12	BUY	Market Buy	박우동 Park Woo-dong	vice president	50	₩92,100	-18.0%	₩5M ($3K)
2026-05-11	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	30	₩93,200	-12.0%	₩3M ($2K)
2026-01-28	SELL	Market Sell	이종무 Jongmoo Lee	Managing Director	-7	₩124,600	+9.1%	₩872K ($606)
2026-01-26	BUY	기타	이종무 Jongmoo Lee	Managing Director	7	₩124,800	-9.2%	₩874K ($607)
2026-01-02	BUY	Market Buy	이종무 Jongmoo Lee	Managing Director	1	₩106,700	+6.2%	₩107K ($74)
2026-01-02	SELL	Market Sell	이종무 Jongmoo Lee	Managing Director	-1	₩106,700	-6.2%	₩107K ($74)
2025-09-10	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	20	₩121,600	-6.8%	₩2M ($2K)
2025-08-12	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	19	₩118,800	-4.6%	₩2M ($2K)
2025-08-12	BUY	Market Buy	박우동 Park Woo-dong	vice president	39	-	-	-
2025-07-23	SELL	Market Sell	임원식 executive ceremony	Managing Director	-8	₩162,400	+30.2%	₩1M ($902)
2025-07-10	BUY	Market Buy	박우동 Park Woo-dong	vice president	40	₩133,500	-15.1%	₩5M ($4K)
2025-07-10	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	20	₩133,500	-15.1%	₩3M ($2K)
2025-06-11	BUY	Market Buy	박우동 Park Woo-dong	vice president	74	₩84,200	+34.6%	₩6M ($4K)
2025-06-11	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	37	₩84,200	+34.6%	₩3M ($2K)
2025-05-19	SELL	Market Sell	김종환 Jonghwan Kim	Managing Director	-10	₩57,300	-97.7%	₩573K ($398)
2025-05-12	BUY	Market Buy	박우동 Park Woo-dong	vice president	80	₩59,700	+89.8%	₩5M ($3K)
2025-05-12	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	40	₩59,700	+89.8%	₩2M ($2K)
2025-04-15	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	60	₩55,400	+104.5%	₩3M ($2K)
2025-04-10	BUY	Market Buy	박우동 Park Woo-dong	vice president	91	₩53,000	+113.8%	₩5M ($3K)
2025-04-10	BUY	Market Buy	황세영 Seyoung Hwang	vice president	12	₩53,000	+113.8%	₩636K ($442)
2025-04-09	BUY	Market Buy	황세영 Seyoung Hwang	vice president	40	₩50,200	+125.7%	₩2M ($1K)
2025-03-12	BUY	Market Buy	박우동 Park Woo-dong	vice president	74	₩61,500	+84.2%	₩5M ($3K)
2025-03-12	BUY	Market Buy	황세영 Seyoung Hwang	vice president	7	₩61,500	+84.2%	₩431K ($299)
2025-03-12	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	37	₩61,500	+84.2%	₩2M ($2K)
2025-03-11	BUY	Market Buy	황세영 Seyoung Hwang	vice president	37	₩65,400	+73.2%	₩2M ($2K)
2025-02-12	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	42	₩55,900	+102.7%	₩2M ($2K)
2025-02-12	BUY	Market Buy	황세영 Seyoung Hwang	vice president	9	₩55,900	+102.7%	₩503K ($349)
2025-02-12	BUY	Market Buy	박우동 Park Woo-dong	vice president	85	₩55,900	+102.7%	₩5M ($3K)
2025-02-11	BUY	Market Buy	황세영 Seyoung Hwang	vice president	42	₩54,900	+106.4%	₩2M ($2K)
2025-01-23	SELL	Market Sell	정동일 Jeong Dong-il	Managing Director	-10	₩53,800	-110.6%	₩538K ($374)
2025-01-21	BUY	PROGRAM	임원식 executive ceremony	Managing Director	8	₩54,900	+106.4%	₩439K ($305)
2025-01-21	BUY	PROGRAM	황영록 Youngrok Hwang	Managing Director	6	₩54,900	+106.4%	₩329K ($229)
2025-01-21	BUY	PROGRAM	이윤재 Yunjae Lee	Managing Director	8	₩54,900	+106.4%	₩439K ($305)
2025-01-21	BUY	PROGRAM	서송원 Seo Song-won	Managing Director	10	₩54,900	+106.4%	₩549K ($381)
2025-01-21	BUY	PROGRAM	정동일 Jeong Dong-il	Managing Director	10	₩54,900	+106.4%	₩549K ($381)
2025-01-21	BUY	PROGRAM	김종환 Jonghwan Kim	Managing Director	10	₩54,900	+106.4%	₩549K ($381)
2025-01-10	BUY	Market Buy	서정국 Seo Jeong-guk	vice president	28	₩53,500	+111.8%	₩1M ($1K)
2025-01-10	BUY	Market Buy	황세영 Seyoung Hwang	vice president	10	₩53,500	+111.8%	₩535K ($372)
2025-01-10	BUY	Market Buy	박우동 Park Woo-dong	vice president	93	₩53,500	+111.8%	₩5M ($3K)
2025-01-09	BUY	Market Buy	황세영 Seyoung Hwang	vice president	43	₩53,300	+112.6%	₩2M ($2K)
2025-01-03	SELL	Market Sell	황영록 Youngrok Hwang	Managing Director	-30	₩53,200	-113.0%	₩2M ($1K)
2025-01-02	SELL	Market Sell	김종환 Jonghwan Kim	Managing Director	-1	₩51,700	-119.2%	₩52K ($36)
2025-01-01	BUY	신규선임	서송원 Seo Song-won	Managing Director	21	₩51,700	+119.2%	₩1M ($754)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Poongsan stock?: 10 distinct insiders have filed 137 disclosed insider purchases in Poongsan (103140), most recently on 2026-06-10. 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 Poongsan have?: Poongsan has 137 buy-side and 113 sell-side disclosures on record, covering ₩148.6B ($103.2M) in total reported value, spanning 2024-01-02 to 2026-06-10.
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.