Who has been buying Samsung SDI stock?

14 distinct insiders have filed 26 disclosed insider purchases in Samsung SDI (006400), most recently on 2026-03-25. 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 Samsung SDI have?

Samsung SDI has 26 buy-side and 1 sell-side disclosures on record, covering ₩866M ($601K) in total reported value, spanning 2024-01-26 to 2026-03-25.

Where does StockDrifts get Samsung SDI insider data?

From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Samsung SDI 006400

Company

삼성SDISamsung SDI

Insiders

Buys

Total Value

₩866M ($601K)

Avg Return

+48.30%

Last Filing

2026-03-25

Samsung SDI (006400) has 26 disclosed insider purchases and 1 disclosed disposals on record, filed by 14 distinct insiders. Together those filings cover ₩866M ($601K) in reported transaction value. The earliest filing StockDrifts holds for Samsung SDI is dated 2024-01-26; the most recent is 2026-03-25. All of it is parsed from DART D001/D002 insider disclosures, the official disclosure system operated by the Financial Supervisory Service (Korea). Across these filings the average return since disclosure is +48.30%, 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
2026-07-20	BUY	기타	김진욱 Jinwook Kim	Managing Director	463	₩401,000	+6.7%	₩65M ($45K)
2026-07-15	BUY	Market Buy	김윤재 Yunjae Kim	vice president	2	₩454,000	-4.8%	₩800K ($556)
2026-03-25	BUY	Market Buy	오재균 Jaekyun Oh	vice president	500	₩404,000	+0.4%	₩202M ($140K)
2026-01-13	BUY	Market Buy	정일형 Jeong Il-hyung	Managing Director	200	₩300,000	+30.5%	₩60M ($42K)
2025-11-25	BUY	신규선임	최재홍 Jaehong Choi	Managing Director	36	₩284,500	+37.6%	₩10M ($7K)
2025-06-02	SELL	기타	김헌준 Heonjun Kim	vice president	-11	₩172,800	-126.6%	₩2M ($1K)
2025-06-02	SELL	기타	남주영 Nam Joo-young	vice president	-4	₩172,800	-126.6%	₩691K ($480)
2025-06-02	SELL	기타	서헌 Seoheon	vice president	-28	₩172,800	-126.6%	₩5M ($3K)
2025-06-02	SELL	기타	조용휘 Yonghwi Cho	vice president	-28	₩172,800	-126.6%	₩5M ($3K)
2025-06-02	SELL	기타	권오중 Kwon Oh-joong	Managing Director	-1	₩172,800	-126.6%	₩173K ($120)
2025-06-02	SELL	기타	김상균 Kim Sang-gyun	vice president	-14	₩172,800	-126.6%	₩2M ($2K)
2025-06-02	SELL	기타	이병우 Byungwoo Lee	vice president	-14	₩172,800	-126.6%	₩2M ($2K)
2025-06-02	SELL	기타	김현욱 Hyunwook Kim	Managing Director	-4	₩172,800	-126.6%	₩691K ($480)
2025-06-02	SELL	기타	김익수 Iksoo Kim	Managing Director	-3	₩172,800	-126.6%	₩518K ($360)
2025-06-02	SELL	기타	김훈규 Kim Hoon-gyu	Managing Director	-3	₩172,800	-126.6%	₩518K ($360)
2025-06-02	SELL	기타	나재호 Na Jae-ho	Managing Director	-2	₩172,800	-126.6%	₩346K ($240)
2025-06-02	SELL	기타	문철환 Cheolhwan Moon	Managing Director	-47	₩172,800	-126.6%	₩8M ($6K)
2025-06-02	SELL	기타	박재범 Jay Park	Managing Director	-16	₩172,800	-126.6%	₩3M ($2K)
2025-06-02	SELL	기타	박용철 Park Yong-cheol	Managing Director	-16	₩172,800	-126.6%	₩3M ($2K)
2025-06-02	SELL	기타	이승준 Seungjun Lee	Managing Director	-32	₩172,800	-126.6%	₩6M ($4K)
2025-06-02	SELL	기타	이종훈 Jong-Hoon Lee	Managing Director	-4	₩172,800	-126.6%	₩691K ($480)
2025-06-02	SELL	기타	이진웅 Jinwoong Lee	Managing Director	-4	₩172,800	-126.6%	₩691K ($480)
2025-06-02	SELL	기타	정훈 Jeonghoon	Managing Director	-7	₩172,800	-126.6%	₩1M ($840)
2025-06-02	SELL	기타	임미화 Lim Mi-hwa	Managing Director	-4	₩172,800	-126.6%	₩691K ($480)
2025-06-02	SELL	기타	임종훈 Jong-Hoon Lim	Managing Director	-4	₩172,800	-126.6%	₩691K ($480)
2025-06-02	BUY	PROGRAM	임종훈 Jong-Hoon Lim	Managing Director	4	₩172,800	+126.6%	₩691K ($480)
2025-06-02	BUY	PROGRAM	임미화 Lim Mi-hwa	Managing Director	4	₩172,800	+126.6%	₩691K ($480)
2025-06-02	BUY	PROGRAM	이진웅 Jinwoong Lee	Managing Director	4	₩172,800	+126.6%	₩691K ($480)
2025-06-02	BUY	PROGRAM	이종훈 Jong-Hoon Lee	Managing Director	4	₩172,800	+126.6%	₩691K ($480)
2025-06-02	BUY	PROGRAM	이승준 Seungjun Lee	Managing Director	35	₩172,800	+126.6%	₩6M ($4K)
2025-06-02	BUY	PROGRAM	박용철 Park Yong-cheol	Managing Director	9	₩172,800	+126.6%	₩2M ($1K)
2025-06-02	BUY	PROGRAM	박재범 Jay Park	Managing Director	16	₩172,800	+126.6%	₩3M ($2K)
2025-06-02	BUY	PROGRAM	김윤창 Yunchang Kim	vice president	9	₩172,800	+126.6%	₩2M ($1K)
2025-06-02	SELL	기타	김윤창 Yunchang Kim	vice president	-9	₩172,800	-126.6%	₩2M ($1K)
2025-06-02	SELL	기타	김윤재 Yunjae Kim	vice president	-8	₩172,800	-126.6%	₩1M ($960)
2025-06-02	SELL	기타	김판배 Panbae Kim	vice president	-14	₩172,800	-126.6%	₩2M ($2K)
2025-06-02	SELL	기타	김윤태 Yoontae Kim	vice president	-14	₩172,800	-126.6%	₩2M ($2K)
2025-06-02	BUY	PROGRAM	김판배 Panbae Kim	vice president	15	₩172,800	+126.6%	₩3M ($2K)
2025-06-02	BUY	PROGRAM	김윤재 Yunjae Kim	vice president	8	₩172,800	+126.6%	₩1M ($960)
2025-06-02	BUY	PROGRAM	문철환 Cheolhwan Moon	Managing Director	54	₩172,800	+126.6%	₩9M ($6K)
2025-06-02	BUY	PROGRAM	나재호 Na Jae-ho	Managing Director	2	₩172,800	+126.6%	₩346K ($240)
2025-06-02	BUY	PROGRAM	김익수 Iksoo Kim	Managing Director	3	₩172,800	+126.6%	₩518K ($360)
2025-06-02	BUY	PROGRAM	김현욱 Hyunwook Kim	Managing Director	4	₩172,800	+126.6%	₩691K ($480)
2025-06-02	BUY	PROGRAM	하영기 Youngki Ha	Managing Director	41	₩172,800	+126.6%	₩7M ($5K)
2025-06-02	SELL	기타	하영기 Youngki Ha	Managing Director	-36	₩172,800	-126.6%	₩6M ($4K)
2025-06-02	BUY	PROGRAM	최주선 Choi Joo-seon	CEO	162	₩172,800	+126.6%	₩28M ($19K)
2025-06-02	SELL	기타	최주선 Choi Joo-seon	CEO	-141	₩172,800	-126.6%	₩24M ($17K)
2025-06-02	BUY	PROGRAM	고주영 Go Joo-young	vice president	31	₩172,800	+126.6%	₩5M ($4K)
2025-06-02	SELL	기타	고주영 Go Joo-young	vice president	-28	₩172,800	-126.6%	₩5M ($3K)
2025-06-02	BUY	PROGRAM	김봉옥 Kim Bong-ok	vice president	3	₩172,800	+126.6%	₩518K ($360)

Showing the 50 most recent of 120 filings.

Frequently asked questions

Who has been buying Samsung SDI stock?: 14 distinct insiders have filed 26 disclosed insider purchases in Samsung SDI (006400), most recently on 2026-03-25. 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 Samsung SDI have?: Samsung SDI has 26 buy-side and 1 sell-side disclosures on record, covering ₩866M ($601K) in total reported value, spanning 2024-01-26 to 2026-03-25.
Where does StockDrifts get Samsung SDI insider data?: From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Source filings

Every trade listed above is disclosed in DART D001/D002 insider disclosures, filed with the Financial Supervisory Service (Korea). View the original DART filings for Samsung SDI. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.