Who has been buying CS stock?

4 distinct insiders have filed 32 disclosed insider purchases in CS (065770), most recently on 2026-06-24. 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 CS have?

CS has 32 buy-side and 2 sell-side disclosures on record, covering ₩171M ($119K) in total reported value, spanning 2026-01-21 to 2026-06-24.

Where does StockDrifts get CS 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.

CS 065770

Company

Insiders

Buys

Total Value

₩171M ($119K)

Avg Return

-2.86%

Last Filing

2026-06-24

CS (065770) has 32 disclosed insider purchases and 2 disclosed disposals on record, filed by 4 distinct insiders. Together those filings cover ₩171M ($119K) in reported transaction value. The earliest filing StockDrifts holds for CS is dated 2026-01-21; the most recent is 2026-06-24. 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 -2.86%, 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
2026-07-16	BUY	제3자배정유상증자	정흥식 Jeong Heung-sik	Chairman	539.7K	₩1,625	-4.3%	₩1.0B ($694K)
2026-07-16	BUY	제3자배정유상증자	권영 Kwon Young	moving	269.8K	₩1,625	-4.3%	₩500M ($347K)
2026-06-24	BUY	Market Buy	김태연 Taeyeon Kim	Headquarters General Manager, CTO)	7.0K	-	-	-
2026-04-29	SELL	주식병합	안경진 Angyeongjin	Managing Director	-6.5K	-	-	-
2026-04-29	SELL	주식병합	김태연 Taeyeon Kim	vice president	-6.6K	-	-	-
2026-04-29	SELL	주식병합	최규훈 Choi Gyu-hoon	CEO	-170.9K	-	-	-
2026-04-29	SELL	주식병합	권영 Kwon Young	moving	-624.7K	-	-	-
2026-04-29	SELL	주식병합	정흥식 Jeong Heung-sik	Chairman	-2.1M	-	-	-
2026-04-02	BUY	Market Buy	정흥식 Jeong Heung-sik	Chairman	1	-	-	-
2026-02-24	BUY	Market Buy	권영 Kwon Young	moving	12.0K	₩785	-3.2%	₩9M ($7K)
2026-02-23	BUY	Market Buy	권영 Kwon Young	moving	58.7K	₩774	-1.8%	₩45M ($32K)
2026-02-20	BUY	Market Buy	권영 Kwon Young	moving	20.9K	₩785	-3.2%	₩16M ($11K)
2026-02-19	BUY	Market Buy	권영 Kwon Young	moving	14.4K	₩777	-2.2%	₩11M ($8K)
2026-02-13	BUY	Market Buy	권영 Kwon Young	moving	12.9K	₩795	-4.4%	₩10M ($7K)
2026-02-12	BUY	Market Buy	권영 Kwon Young	moving	11.7K	₩850	-10.6%	₩10M ($7K)
2026-02-05	BUY	Market Buy	권영 Kwon Young	moving	11.8K	₩840	-9.5%	₩10M ($7K)
2026-02-04	BUY	Market Buy	권영 Kwon Young	moving	15.0K	₩853	-10.9%	₩13M ($9K)
2026-02-03	BUY	Market Buy	정흥식 Jeong Heung-sik	Chairman	5.4K	₩781	-2.7%	₩4M ($3K)
2026-02-03	BUY	Market Buy	권영 Kwon Young	moving	10.6K	₩781	-2.7%	₩8M ($6K)
2026-02-02	BUY	Market Buy	정흥식 Jeong Heung-sik	Chairman	647	₩777	-2.2%	₩503K ($349)
2026-02-02	BUY	Market Buy	안경진 Angyeongjin	Managing Director	13.0K	₩777	-2.2%	₩10M ($7K)
2026-01-30	BUY	Market Buy	정흥식 Jeong Heung-sik	Chairman	6.0K	₩778	-2.3%	₩5M ($3K)
2026-01-29	BUY	Market Buy	정흥식 Jeong Heung-sik	Chairman	7.0K	₩789	-3.7%	₩6M ($4K)
2026-01-28	BUY	Market Buy	정흥식 Jeong Heung-sik	Chairman	1.0K	₩779	-2.4%	₩779K ($541)
2026-01-22	SELL	Market Sell	김태연 Taeyeon Kim	vice president	-999	₩777	+2.2%	₩776K ($539)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	2.7K	₩777	-2.2%	₩2M ($1K)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	27	₩777	-2.2%	₩21K ($15)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	36	₩777	-2.2%	₩28K ($19)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	51	₩777	-2.2%	₩40K ($28)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	1.6K	₩777	-2.2%	₩1M ($875)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	131	₩777	-2.2%	₩102K ($71)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	391	₩777	-2.2%	₩304K ($211)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	81	₩777	-2.2%	₩63K ($44)
2026-01-22	BUY	Market Buy	김태연 Taeyeon Kim	vice president	3.9K	₩777	-2.2%	₩3M ($2K)
2026-01-22	SELL	Market Sell	김태연 Taeyeon Kim	vice president	-1	₩777	+2.2%	₩777 ($1)
2026-01-21	BUY	Market Buy	김태연 Taeyeon Kim	vice president	2.4K	₩776	-2.1%	₩2M ($1K)
2026-01-21	BUY	Market Buy	김태연 Taeyeon Kim	vice president	100	₩776	-2.1%	₩78K ($54)
2026-01-21	BUY	Market Buy	김태연 Taeyeon Kim	vice president	464	₩776	-2.1%	₩360K ($250)
2026-01-21	BUY	Market Buy	김태연 Taeyeon Kim	vice president	81	₩776	-2.1%	₩63K ($44)
2026-01-21	BUY	Market Buy	김태연 Taeyeon Kim	vice president	1.0K	₩776	-2.1%	₩778K ($540)
2026-01-21	BUY	Market Buy	김태연 Taeyeon Kim	vice president	1.1K	₩776	-2.1%	₩853K ($592)

Frequently asked questions

Who has been buying CS stock?: 4 distinct insiders have filed 32 disclosed insider purchases in CS (065770), most recently on 2026-06-24. 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 CS have?: CS has 32 buy-side and 2 sell-side disclosures on record, covering ₩171M ($119K) in total reported value, spanning 2026-01-21 to 2026-06-24.
Where does StockDrifts get CS 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 CS. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.