Who has been buying Oros Technology stock?

5 distinct insiders have filed 2 disclosed insider purchases in Oros Technology (322310), most recently on 2026-05-22. 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 Oros Technology have?

Oros Technology has 2 buy-side and 10 sell-side disclosures on record, covering ₩623M ($433K) in total reported value, spanning 2024-03-11 to 2026-05-22.

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.

Oros Technology 322310

Company

오로스테크놀로지Oros Technology

Insiders

Buys

Total Value

₩623M ($433K)

Avg Return

+12.97%

Last Filing

2026-05-22

Oros Technology (322310) has 2 disclosed insider purchases and 10 disclosed disposals on record, filed by 5 distinct insiders. Together those filings cover ₩623M ($433K) in reported transaction value. The earliest filing StockDrifts holds for Oros Technology is dated 2024-03-11; the most recent is 2026-05-22. Across these filings the average return since disclosure is +12.97%, 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
2026-09-15	BUY	Market Buy	최성원 Seongwon Choi	CEO	2.5K	₩12,230	+0.0%	₩31M ($22K)
2026-09-14	BUY	Market Buy	최성원 Seongwon Choi	CEO	4.5K	₩11,710	+4.4%	₩56M ($39K)
2026-05-22	BUY	Market Buy	최성원 Seongwon Choi	CEO	1.5K	₩29,050	-6.5%	₩44M ($30K)
2026-05-04	SELL	Market Sell	장현진 Hyunjin Jang	Managing Director	-10.0K	-	-	-
2026-05-04	SELL	Market Sell	유재만 Jaeman Yoo	Managing Director	-8.0K	-	-	-
2026-05-04	SELL	Market Sell	이준우 Junwoo Lee	CEO	-50.0K	-	-	-
2026-04-29	SELL	시간외매매	시엠테크놀로지 CM Technology	-	-243.0K	₩36,150	+4.6%	₩8.8B ($6.1M)
2026-04-29	SELL	Market Sell	유재만 Jaeman Yoo	Managing Director	-2.0K	₩36,150	+4.6%	₩72M ($50K)
2026-03-29	SELL	계약기간만료	이준우 Junwoo Lee	CEO	-137.0K	₩29,400	-17.4%	₩4.0B ($2.8M)
2026-03-18	SELL	Market Sell	유재만 Jaeman Yoo	Managing Director	-3.0K	-	-	-
2026-03-13	SELL	Market Sell	유재만 Jaeman Yoo	Managing Director	-2.0K	-	-	-
2025-10-16	SELL	Market Sell	장현진 Hyunjin Jang	Managing Director	-10.1K	₩30,700	+20.9%	₩309M ($214K)
2025-10-13	SELL	Market Sell	유재만 Jaeman Yoo	Managing Director	-1.7K	₩32,350	+24.9%	₩55M ($38K)
2025-09-24	SELL	Market Sell	유재만 Jaeman Yoo	Managing Director	-300	₩29,200	+16.8%	₩9M ($6K)
2024-05-24	BUY	Market Buy	유재만 Jaeman Yoo	Managing Director	251	₩24,550	-1.0%	₩6M ($4K)
2024-03-27	BUY	주식매수선택권	최성원 Seongwon Choi	CEO	50.0K	₩35,000	-30.6%	₩1.8B ($1.2M)
2024-03-11	SELL	Market Sell	박진석 Jinseok Park	Managing Director	-3.6K	₩35,350	+31.3%	₩129M ($90K)

Frequently asked questions

Who has been buying Oros Technology stock?: 5 distinct insiders have filed 2 disclosed insider purchases in Oros Technology (322310), most recently on 2026-05-22. 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 Oros Technology have?: Oros Technology has 2 buy-side and 10 sell-side disclosures on record, covering ₩623M ($433K) in total reported value, spanning 2024-03-11 to 2026-05-22.
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.