Who has been buying Cyber One stock?

3 distinct insiders have filed 0 disclosed insider purchases in Cyber One (356890), most recently on 2025-04-30. 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 Cyber One have?

Cyber One has 0 buy-side and 3 sell-side disclosures on record, covering ₩305M ($212K) in total reported value, spanning 2024-03-29 to 2025-04-30.

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.

Cyber One 356890

Company

싸이버원Cyber One

Insiders

Buys

Total Value

₩305M ($212K)

Avg Return

+14.54%

Last Filing

2025-04-30

Cyber One (356890) has 0 disclosed insider purchases and 3 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩305M ($212K) in reported transaction value. The earliest filing StockDrifts holds for Cyber One is dated 2024-03-29; the most recent is 2025-04-30. Across these filings the average return since disclosure is +14.54%, 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
2025-04-30	SELL	Market Sell	육동현 Yuk Dong-hyeon	CEO	-20.0K	₩4,330	+12.2%	₩87M ($60K)
2025-04-30	SELL	Market Sell	이정상 Lee Sang-sang	Managing Director	-45.0K	₩4,330	+12.2%	₩195M ($135K)
2025-03-07	BUY	주식매수청구권 행사	이정상 Lee Sang-sang	Managing Director	37.5K	₩4,115	-7.7%	₩154M ($107K)
2025-02-27	SELL	Market Sell	윤희규 Hee-gyu Yoon	Managing Director	-5.0K	₩4,700	+19.1%	₩24M ($16K)
2025-01-16	BUY	수증	김희올 Kim Hee-ol	moving	59.6K	₩3,155	+20.4%	₩188M ($131K)
2025-01-16	BUY	수증	김희망 Kim Hee-mang	Managing Director	59.6K	₩3,155	+20.4%	₩188M ($131K)
2024-04-13	BUY	주식분할	김희망 Kim Hee-mang	Managing Director	91.3K	₩3,740	+1.6%	₩342M ($237K)
2024-04-13	BUY	주식분할	김용옥 Kim Yong-ok	-	2.9M	₩3,740	+1.6%	₩10.7B ($7.4M)
2024-04-13	BUY	주식분할	육동현 Yuk Dong-hyeon	CEO	598.1K	₩3,740	+1.6%	₩2.2B ($1.6M)
2024-04-13	BUY	주식분할	윤희규 Hee-gyu Yoon	Managing Director	3.0K	₩3,740	+1.6%	₩11M ($8K)
2024-04-13	BUY	주식분할	김희올 Kim Hee-ol	moving	55.2K	₩3,740	+1.6%	₩206M ($143K)
2024-04-13	BUY	주식분할	이정상 Lee Sang-sang	Managing Director	39.0K	₩3,740	+1.6%	₩146M ($101K)
2024-04-01	BUY	신규선임	윤희규 Hee-gyu Yoon	Managing Director	2.0K	₩3,780	+0.5%	₩8M ($5K)
2024-03-31	SELL	임원퇴임	유석원 Yoo Seok-won	Managing Director	-27.0K	₩3,780	-0.5%	₩102M ($71K)
2024-03-29	BUY	신규선임	김희올 Kim Hee-ol	moving	36.8K	₩3,760	+1.1%	₩138M ($96K)

Frequently asked questions

Who has been buying Cyber One stock?: 3 distinct insiders have filed 0 disclosed insider purchases in Cyber One (356890), most recently on 2025-04-30. 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 Cyber One have?: Cyber One has 0 buy-side and 3 sell-side disclosures on record, covering ₩305M ($212K) in total reported value, spanning 2024-03-29 to 2025-04-30.
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.

Cyber ​​One 356890

Price & insider activity (12 months)

Recent insider trades

Frequently asked questions

More on this data

Cyber One 356890