Who has been buying Ilyang Pharmaceutical stock?

3 distinct insiders have filed 31 disclosed insider purchases in Ilyang Pharmaceutical (007570), most recently on 2026-05-28. 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 Ilyang Pharmaceutical have?

Ilyang Pharmaceutical has 31 buy-side and 0 sell-side disclosures on record, covering ₩433M ($301K) in total reported value, spanning 2024-07-24 to 2026-05-28.

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.

Ilyang Pharmaceutical 007570

Company

일양약품Ilyang Pharmaceutical

Insiders

Buys

Total Value

₩433M ($301K)

Avg Return

-2.26%

Last Filing

2026-05-28

Ilyang Pharmaceutical (007570) has 31 disclosed insider purchases and 0 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩433M ($301K) in reported transaction value. The earliest filing StockDrifts holds for Ilyang Pharmaceutical is dated 2024-07-24; the most recent is 2026-05-28. 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
2026-09-21	BUY	수증	정유석 Jeong Yoo-seok	CEO and President	354.1K	₩7,950	-0.4%	₩2.8B ($2.0M)
2026-09-21	SELL	증여	정도언 Jeong Do-eon	-	-474.1K	₩7,950	+0.4%	₩3.8B ($2.6M)
2026-09-10	SELL	임원퇴임	이제형 Lee Je-hyung	Managing Director	-4.2K	₩8,270	+2.8%	₩35M ($24K)
2026-07-30	SELL	증여	정도언 Jeong Do-eon	-	-1.7M	₩8,130	-3.1%	₩13.8B ($9.6M)
2026-07-30	BUY	수증	정유석 Jeong Yoo-seok	CEO and President	1.7M	₩8,130	+3.1%	₩13.8B ($9.6M)
2026-05-28	BUY	Market Buy	정연찬 Yeonchan Jeong	Managing Director	1.1K	₩9,080	+0.0%	₩10M ($7K)
2026-05-27	BUY	Market Buy	송화준 Song Hwajun	moving	2.0K	₩9,310	-2.5%	₩19M ($13K)
2026-04-01	BUY	신규선임	송화준 Song Hwajun	moving	60	₩11,180	+3.2%	₩671K ($466)
2025-07-08	BUY	기타	정도언 Jeong Do-eon	-	50	-	-	-
2025-05-10	SELL	임원퇴임	서원철 Seo Won-cheol	Managing Director	-70	₩12,850	-1.6%	₩900K ($625)
2024-10-18	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.1K	₩13,240	-1.4%	₩15M ($10K)
2024-10-17	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩12,980	+0.5%	₩19M ($14K)
2024-10-16	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩13,080	-0.2%	₩20M ($14K)
2024-10-15	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩12,950	+0.8%	₩19M ($13K)
2024-10-14	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.0K	₩12,890	+1.2%	₩13M ($9K)
2024-10-11	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.0K	₩12,920	+1.0%	₩13M ($9K)
2024-10-10	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	500	₩12,910	+1.1%	₩6M ($4K)
2024-10-07	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩12,970	+0.6%	₩19M ($14K)
2024-10-04	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.0K	₩13,010	+0.3%	₩13M ($9K)
2024-09-30	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.0K	₩13,060	-0.1%	₩13M ($9K)
2024-09-11	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	300	₩13,180	-1.0%	₩4M ($3K)
2024-09-09	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	500	₩13,060	-0.1%	₩7M ($5K)
2024-09-09	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	500	₩13,060	-0.1%	₩7M ($5K)
2024-09-09	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	500	₩13,060	-0.1%	₩7M ($5K)
2024-09-06	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	88	₩13,060	-0.1%	₩1M ($798)
2024-09-06	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	760	₩13,060	-0.1%	₩10M ($7K)
2024-09-06	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	150	₩13,060	-0.1%	₩2M ($1K)
2024-09-06	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	501	₩13,060	-0.1%	₩7M ($5K)
2024-09-06	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1	₩13,060	-0.1%	₩13K ($9)
2024-08-08	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩14,770	-11.7%	₩22M ($15K)
2024-08-07	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩14,360	-9.1%	₩22M ($15K)
2024-08-02	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩14,100	-7.5%	₩21M ($15K)
2024-08-01	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩14,270	-8.6%	₩21M ($15K)
2024-07-31	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩13,950	-6.5%	₩21M ($15K)
2024-07-30	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩13,820	-5.6%	₩21M ($14K)
2024-07-29	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩13,840	-5.7%	₩21M ($14K)
2024-07-26	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩13,770	-5.2%	₩21M ($14K)
2024-07-25	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩13,710	-4.8%	₩21M ($14K)
2024-07-24	BUY	Market Buy	정유석 Jeong Yoo-seok	CEO and President	1.5K	₩13,780	-5.3%	₩21M ($14K)
2020-07-02	BUY	기타	정도언 Jeong Do-eon	-	50	-	-	-

Frequently asked questions

Who has been buying Ilyang Pharmaceutical stock?: 3 distinct insiders have filed 31 disclosed insider purchases in Ilyang Pharmaceutical (007570), most recently on 2026-05-28. 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 Ilyang Pharmaceutical have?: Ilyang Pharmaceutical has 31 buy-side and 0 sell-side disclosures on record, covering ₩433M ($301K) in total reported value, spanning 2024-07-24 to 2026-05-28.
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.