Who has been buying omni system stock?

0 distinct insiders have filed 0 disclosed insider purchases in omni system (057540), most recently on 2025-04-23. 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 omni system have?

omni system has 0 buy-side and 0 sell-side disclosures on record, spanning 2025-04-23 to 2025-04-23.

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.

omni system 057540

Company

옴니시스템omni system

Insiders

Buys

Total Value

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Avg Return

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Last Filing

2025-04-23

omni system (057540) has 0 disclosed insider purchases and 0 disclosed disposals on record, filed by 0 distinct insiders. The earliest filing StockDrifts holds for omni system is dated 2025-04-23; the most recent is 2025-04-23.

Price & insider activity (12 months)

Recent insider trades

Date	Type	Source	Insider	Position	Shares	Price at filing	Return	Value
2026-08-13	BUY	Market Buy	바이오스마트 biosmart	-	1.2M	₩682	-4.4%	₩1.2B ($822K)
2026-07-31	BUY	Market Buy	바이오스마트 biosmart	-	350.0K	₩842	+0.0%	₩316M ($220K)
2026-07-30	BUY	Market Buy	바이오스마트 biosmart	-	310.0K	₩865	-2.7%	₩287M ($199K)
2026-07-29	BUY	Market Buy	바이오스마트 biosmart	-	568.0K	₩925	-9.0%	₩528M ($366K)
2026-07-28	BUY	Market Buy	바이오스마트 biosmart	-	930.0K	₩929	-9.4%	₩797M ($553K)
2026-07-27	BUY	Market Buy	바이오스마트 biosmart	-	163.4K	₩940	-10.4%	₩138M ($96K)
2026-07-24	BUY	Market Buy	바이오스마트 biosmart	-	232.9K	₩880	-4.3%	₩219M ($152K)
2026-07-23	BUY	Market Buy	바이오스마트 biosmart	-	317.8K	₩812	+3.7%	₩295M ($205K)
2026-07-22	BUY	Market Buy	바이오스마트 biosmart	-	203.0K	₩935	-9.9%	₩187M ($130K)
2026-07-21	BUY	Market Buy	바이오스마트 biosmart	-	178.2K	₩940	-10.4%	₩168M ($116K)
2026-07-20	BUY	Market Buy	바이오스마트 biosmart	-	463.5K	₩919	-4.2%	₩430M ($299K)
2026-07-16	BUY	Market Buy	바이오스마트 biosmart	-	626.7K	₩919	-4.2%	₩559M ($388K)
2026-07-15	BUY	Market Buy	바이오스마트 biosmart	-	294.7K	₩935	-0.4%	₩263M ($182K)
2026-07-14	BUY	Market Buy	바이오스마트 biosmart	-	190.6K	₩895	+4.0%	₩167M ($116K)
2026-07-13	BUY	Market Buy	바이오스마트 biosmart	-	178.9K	₩900	+3.4%	₩148M ($103K)
2025-04-23	BUY	자사주상여금	봉이선 Bong-i-seon	moving	2.3K	₩989	-7.8%	₩2M ($2K)
2025-04-23	BUY	신규보고	이명우 Myungwoo Lee	moving	2.0K	₩989	-7.8%	₩2M ($1K)
2025-04-23	BUY	신규보고	박남규 Park Nam-gyu	Managing Director	2.3K	₩989	-7.8%	₩2M ($2K)
2025-04-23	BUY	신규보고	전성열 Seongyeol Jeon	vice president	2.8K	₩989	-7.8%	₩3M ($2K)

Frequently asked questions

Who has been buying omni system stock?: 0 distinct insiders have filed 0 disclosed insider purchases in omni system (057540), most recently on 2025-04-23. 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 omni system have?: omni system has 0 buy-side and 0 sell-side disclosures on record, spanning 2025-04-23 to 2025-04-23.
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.