Who has been buying Sam C&S stock?

1 distinct insiders have filed 0 disclosed insider purchases in Sam C&S (252990), most recently on 2026-07-09. 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 Sam C&S have?

Sam C&S has 0 buy-side and 7 sell-side disclosures on record, covering ₩22.0B ($15.2M) in total reported value, spanning 2021-12-06 to 2026-07-09.

Where does StockDrifts get Sam C&S 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.

Sam C&S 252990

Company

샘씨엔에스Sam C&S

Insiders

Buys

Total Value

₩22.0B ($15.2M)

Avg Return

-37.12%

Last Filing

2026-07-09

Sam C&S (252990) has 0 disclosed insider purchases and 7 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩22.0B ($15.2M) in reported transaction value. The earliest filing StockDrifts holds for Sam C&S is dated 2021-12-06; the most recent is 2026-07-09. 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 -37.12%, 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
2026-08-01	BUY	신규선임	이창원 Lee Chang-won	Managing Director	30.0K	₩11,750	+8.1%	₩353M ($245K)
2026-07-09	BUY	기타	고대진 Go Dae-jin	moving	2.5K	₩10,620	+0.0%	₩27M ($18K)
2026-07-09	BUY	기타	정두연 Dooyeon Jeong	Managing Director	3.0K	₩10,620	+0.0%	₩32M ($22K)
2024-04-26	SELL	Market Sell	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	-428.1K	₩8,800	-28.4%	₩3.8B ($2.6M)
2024-04-25	SELL	Market Sell	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	-4.9K	₩7,810	-44.7%	₩38M ($27K)
2024-04-24	SELL	Market Sell	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	-533.0K	₩8,270	-36.6%	₩4.4B ($3.1M)
2024-04-22	SELL	Market Sell	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	-76.8K	₩8,240	-37.1%	₩633M ($439K)
2024-04-18	SELL	Market Sell	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	-1.1M	₩8,590	-31.6%	₩9.0B ($6.3M)
2024-04-17	SELL	Market Sell	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	-66.7K	₩8,030	-40.7%	₩536M ($372K)
2024-04-12	SELL	Market Sell	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	-442.8K	₩8,030	-40.7%	₩3.6B ($2.5M)
2024-02-08	BUY	전환사채의권리행사	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	2.7M	₩7,330	+54.2%	₩20.1B ($14.0M)
2024-02-08	SELL	전환등	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	-2.7M	₩7,330	-54.2%	₩20.1B ($14.0M)
2022-08-30	BUY	행사가액조정	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	1.4M	₩4,960	+127.8%	₩7.0B ($4.9M)
2022-05-31	BUY	행사가액조정	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	88.7K	₩6,280	+79.9%	₩557M ($387K)
2021-12-06	BUY	CB인수	대신 신기술투자조합 제11호 Daesin New Technology Investment Association No. 11	-	8.6M	₩5,850	+93.2%	₩50.0B ($34.8M)

Frequently asked questions

Who has been buying Sam C&S stock?: 1 distinct insiders have filed 0 disclosed insider purchases in Sam C&S (252990), most recently on 2026-07-09. 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 Sam C&S have?: Sam C&S has 0 buy-side and 7 sell-side disclosures on record, covering ₩22.0B ($15.2M) in total reported value, spanning 2021-12-06 to 2026-07-09.
Where does StockDrifts get Sam C&S 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 Sam C&S. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.