Who has been buying 4by4 stock?

2 distinct insiders have filed 10 disclosed insider purchases in 4by4 (389140), most recently on 2026-03-30. 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 4by4 have?

4by4 has 10 buy-side and 4 sell-side disclosures on record, covering ₩2.3B ($1.6M) in total reported value, spanning 2024-07-30 to 2026-03-30.

Where does StockDrifts get 4by4 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.

4by4 389140

Company

포바이포4by4

Insiders

Buys

Total Value

₩2.3B ($1.6M)

Avg Return

+101.55%

Last Filing

2026-03-30

4by4 (389140) has 10 disclosed insider purchases and 4 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩2.3B ($1.6M) in reported transaction value. The earliest filing StockDrifts holds for 4by4 is dated 2024-07-30; the most recent is 2026-03-30. 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 +101.55%, 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
2026-03-30	BUY	신규선임	봉영수 Bong Yeong-su	moving	3.0K	₩8,660	+2.9%	₩26M ($18K)
2025-12-19	SELL	기타	배성완 Seongwan Bae	general manager	-1.1K	₩7,870	-68.7%	₩9M ($6K)
2025-12-19	BUY	유상신주취득	윤준호 Junho Yoon	CEO	295.4K	₩7,870	+68.7%	₩2.3B ($1.6M)
2025-12-19	SELL	기타	윤준호 Junho Yoon	CEO	-246.2K	₩7,870	-68.7%	₩1.9B ($1.3M)
2025-12-19	BUY	유상신주취득	배성완 Seongwan Bae	general manager	1.3K	₩7,870	+68.7%	₩10M ($7K)
2025-11-21	SELL	시간외매매	윤준호 Junho Yoon	CEO	-180.0K	₩8,250	-61.0%	₩1.5B ($1.0M)
2025-11-14	BUY	기타	배성완 Seongwan Bae	general manager	1.1K	₩9,310	+42.6%	₩10M ($7K)
2025-11-14	SELL	장외매도	윤준호 Junho Yoon	CEO	-574.4K	₩9,310	-42.6%	₩5.3B ($3.7M)
2025-11-14	BUY	기타	윤준호 Junho Yoon	CEO	820.6K	₩9,310	+42.6%	₩7.6B ($5.3M)
2025-06-11	BUY	신규선임	배성완 Seongwan Bae	general manager	4.0K	₩17,991	-26.2%	₩72M ($50K)
2025-05-02	SELL	Market Sell	임정현 Lim Jeong-hyeon	-	-3.0K	₩17,432	+23.8%	₩52M ($36K)
2025-04-30	SELL	Market Sell	임정현 Lim Jeong-hyeon	-	-1.5K	₩18,446	+28.0%	₩28M ($19K)
2025-04-29	SELL	Market Sell	임정현 Lim Jeong-hyeon	-	-11.0K	₩18,437	+28.0%	₩203M ($141K)
2025-04-18	SELL	Market Sell	임정현 Lim Jeong-hyeon	-	-89.5K	₩20,698	+35.8%	₩1.9B ($1.3M)
2025-04-02	BUY	신규선임	최인호 Inho Choi	Internal director	11.0K	₩5,488	+142.0%	₩60M ($42K)
2024-11-06	BUY	Market Buy	윤준호 Junho Yoon	CEO	731	₩5,507	+141.2%	₩4M ($3K)
2024-11-04	BUY	Market Buy	윤준호 Junho Yoon	CEO	4.5K	₩5,330	+149.2%	₩24M ($17K)
2024-11-01	BUY	Market Buy	윤준호 Junho Yoon	CEO	3.5K	₩5,200	+155.4%	₩18M ($13K)
2024-10-31	BUY	Market Buy	윤준호 Junho Yoon	CEO	4.0K	₩5,274	+151.8%	₩21M ($15K)
2024-10-30	BUY	Market Buy	윤준호 Junho Yoon	CEO	5.0K	₩5,237	+153.6%	₩26M ($18K)
2024-08-05	BUY	Market Buy	윤준호 Junho Yoon	CEO	6.8K	₩5,339	+148.7%	₩36M ($25K)
2024-08-02	BUY	Market Buy	윤준호 Junho Yoon	CEO	5.5K	₩6,344	+109.3%	₩35M ($24K)
2024-08-01	BUY	Market Buy	윤준호 Junho Yoon	CEO	2.5K	₩6,828	+94.5%	₩17M ($12K)
2024-07-31	BUY	Market Buy	윤준호 Junho Yoon	CEO	500	₩6,753	+96.7%	₩3M ($2K)
2024-07-30	BUY	Market Buy	윤준호 Junho Yoon	CEO	2.0K	₩6,455	+105.7%	₩13M ($9K)

Frequently asked questions

Who has been buying 4by4 stock?: 2 distinct insiders have filed 10 disclosed insider purchases in 4by4 (389140), most recently on 2026-03-30. 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 4by4 have?: 4by4 has 10 buy-side and 4 sell-side disclosures on record, covering ₩2.3B ($1.6M) in total reported value, spanning 2024-07-30 to 2026-03-30.
Where does StockDrifts get 4by4 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 4by4. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.