Who has been buying Samjin Pharmaceutical stock?

5 distinct insiders have filed 19 disclosed insider purchases in Samjin Pharmaceutical (005500), most recently on 2026-07-02. 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 Samjin Pharmaceutical have?

Samjin Pharmaceutical has 19 buy-side and 1 sell-side disclosures on record, covering ₩412M ($286K) in total reported value, spanning 2024-10-08 to 2026-07-02.

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.

Samjin Pharmaceutical 005500

Company

삼진제약Samjin Pharmaceutical

Insiders

Buys

Total Value

₩412M ($286K)

Avg Return

+3.28%

Last Filing

2026-07-02

Samjin Pharmaceutical (005500) has 19 disclosed insider purchases and 1 disclosed disposals on record, filed by 5 distinct insiders. Together those filings cover ₩412M ($286K) in reported transaction value. The earliest filing StockDrifts holds for Samjin Pharmaceutical is dated 2024-10-08; the most recent is 2026-07-02. Across these filings the average return since disclosure is +3.28%, 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
2026-09-02	BUY	신규보고	최영조 Youngjo Choi	moving	200	₩18,660	+0.5%	₩4M ($3K)
2026-08-24	BUY	수증	최지선 Choi Ji-seon	vice president	66.6K	₩18,040	+2.2%	₩1.2B ($834K)
2026-08-24	SELL	증여	최승주 Seungju Choi	-	-266.4K	₩18,040	-2.2%	₩4.8B ($3.3M)
2026-08-24	BUY	수증	최지현 Jihyun Choi	CEO and President	133.2K	₩18,040	+2.2%	₩2.4B ($1.7M)
2026-08-10	BUY	수증	조규석 Jo Gyu-seok	CEO and President	135.0K	₩18,370	+0.0%	₩2.5B ($1.7M)
2026-08-10	BUY	수증	조규형 Gyuhyung Cho	vice president	135.0K	₩18,370	+0.0%	₩2.5B ($1.7M)
2026-08-10	SELL	증여	조의환 Jo Eui-hwan	-	-270.0K	₩18,370	+0.0%	₩5.0B ($3.4M)
2026-07-30	BUY	Market Buy	진창화 Jin Changhwa	Managing Director	2.8K	₩17,060	+3.9%	₩49M ($34K)
2026-07-29	BUY	Market Buy	진창화 Jin Changhwa	Managing Director	1.0K	₩17,010	+4.2%	₩18M ($12K)
2026-07-23	BUY	Market Buy	진창화 Jin Changhwa	Managing Director	1.0K	₩17,880	-0.8%	₩18M ($12K)
2026-07-22	BUY	Market Buy	진창화 Jin Changhwa	Managing Director	1.0K	₩17,580	+0.8%	₩18M ($12K)
2026-07-02	BUY	Market Buy	최지현 Jihyun Choi	CEO and President	600	₩18,650	-3.6%	₩11M ($8K)
2026-07-01	BUY	Market Buy	최지현 Jihyun Choi	CEO and President	1.5K	₩19,170	-6.3%	₩29M ($20K)
2026-06-29	BUY	Market Buy	신승원 Seungwon Shin	moving	200	₩18,790	-1.9%	₩4M ($3K)
2026-06-25	SELL	Market Sell	최지현 Jihyun Choi	CEO and President	-2.8K	₩18,350	+2.1%	₩50M ($35K)
2026-06-25	BUY	Market Buy	신승원 Seungwon Shin	moving	200	₩18,350	+0.4%	₩4M ($3K)
2026-06-10	BUY	Market Buy	박창익 Park Chang-ik	Managing Director	1.3K	₩18,780	+0.7%	₩25M ($17K)
2026-05-15	BUY	Market Buy	김상진 Sangjin Kim	president	3.0K	₩19,510	+16.1%	₩59M ($41K)
2026-05-15	BUY	Market Buy	신승원 Seungwon Shin	moving	548	₩19,510	+16.1%	₩11M ($7K)
2026-05-14	BUY	Market Buy	신승원 Seungwon Shin	moving	2	₩23,250	-2.6%	₩47K ($32)
2026-05-14	BUY	신규보고	신승원 Seungwon Shin	moving	50	₩23,250	-2.6%	₩1M ($807)
2026-04-13	BUY	Market Buy	박창익 Park Chang-ik	Managing Director	2.0K	₩18,620	+1.1%	₩37M ($26K)
2025-11-25	BUY	Market Buy	김상진 Sangjin Kim	president	989	₩19,800	+0.8%	₩20M ($14K)
2025-11-21	BUY	Market Buy	김상진 Sangjin Kim	president	1.0K	₩20,000	-0.3%	₩20M ($14K)
2025-08-27	BUY	Market Buy	김상진 Sangjin Kim	president	2.0K	₩18,790	+6.2%	₩38M ($26K)
2025-08-26	BUY	Market Buy	김상진 Sangjin Kim	president	500	₩19,160	+4.1%	₩10M ($7K)
2025-07-04	BUY	Market Buy	김상진 Sangjin Kim	president	2.0K	₩19,250	+3.6%	₩39M ($27K)
2025-07-01	BUY	Market Buy	김상진 Sangjin Kim	president	500	₩18,950	+5.3%	₩9M ($7K)
2025-01-01	BUY	신규선임	장명수 Jang Myung-soo	moving	1.2K	₩17,840	+11.8%	₩22M ($15K)
2024-10-15	BUY	Market Buy	전상진 Sangjin Jeon	Managing Director	357	₩18,920	+5.4%	₩7M ($5K)
2024-10-14	BUY	Market Buy	전상진 Sangjin Jeon	Managing Director	1.9K	₩18,780	+6.2%	₩36M ($25K)
2024-10-10	BUY	Market Buy	전상진 Sangjin Jeon	Managing Director	150	₩18,900	+5.6%	₩3M ($2K)
2024-10-08	BUY	Market Buy	전상진 Sangjin Jeon	Managing Director	150	₩18,700	+6.7%	₩3M ($2K)
2024-10-08	BUY	신규보고	전상진 Sangjin Jeon	Managing Director	975	₩18,700	+6.7%	₩18M ($13K)

Frequently asked questions

Who has been buying Samjin Pharmaceutical stock?: 5 distinct insiders have filed 19 disclosed insider purchases in Samjin Pharmaceutical (005500), most recently on 2026-07-02. 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 Samjin Pharmaceutical have?: Samjin Pharmaceutical has 19 buy-side and 1 sell-side disclosures on record, covering ₩412M ($286K) in total reported value, spanning 2024-10-08 to 2026-07-02.
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.