Who has been buying Blue MTech stock?

3 distinct insiders have filed 4 disclosed insider purchases in Blue MTech (439580), most recently on 2026-05-25. 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 Blue MTech have?

Blue MTech has 4 buy-side and 7 sell-side disclosures on record, covering ₩631M ($439K) in total reported value, spanning 2024-02-08 to 2026-05-25.

Where does StockDrifts get Blue MTech 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.

Blue MTech 439580

Company

블루엠텍Blue MTech

Insiders

Buys

Total Value

₩631M ($439K)

Avg Return

+17.02%

Last Filing

2026-05-25

Blue MTech (439580) has 4 disclosed insider purchases and 7 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩631M ($439K) in reported transaction value. The earliest filing StockDrifts holds for Blue MTech is dated 2024-02-08; the most recent is 2026-05-25. 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 +17.02%, 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
2026-05-25	BUY	Market Buy	연제량 amount of smoke	Internal director	75.5K	₩2,580	-13.8%	₩195M ($135K)
2025-11-25	BUY	Market Buy	양문술 Yangmunsul	Other non-executive directors	1.4K	₩4,415	-0.7%	₩6M ($4K)
2025-08-21	SELL	Market Sell	연제량 amount of smoke	Internal director	-10.0K	₩6,190	+29.2%	₩62M ($43K)
2025-08-20	SELL	Market Sell	연제량 amount of smoke	Internal director	-9.0K	₩6,260	+29.9%	₩56M ($39K)
2025-05-09	BUY	무상신주취득	김현수 Hyunsoo Kim	CEO	1.6M	₩8,410	-47.9%	₩13.8B ($9.6M)
2025-05-09	BUY	무상신주취득	연제량 amount of smoke	Internal director	2.4M	₩8,410	-47.9%	₩19.9B ($13.8M)
2025-05-08	SELL	Market Sell	연제량 amount of smoke	Internal director	-9.5K	₩7,500	+41.5%	₩71M ($49K)
2025-04-25	SELL	Market Sell	양문술 Yangmunsul	Other non-executive directors	-5.0K	₩5,169	+15.2%	₩26M ($18K)
2025-04-22	SELL	Market Sell	양문술 Yangmunsul	Other non-executive directors	-6.1K	₩4,272	-2.6%	₩26M ($18K)
2025-04-09	BUY	Market Buy	양문술 Yangmunsul	Other non-executive directors	2.9K	₩3,158	+38.9%	₩9M ($6K)
2025-03-31	BUY	신규선임	양문술 Yangmunsul	Other non-executive directors	138.5K	₩3,405	+28.8%	₩472M ($328K)
2024-10-10	SELL	Market Sell	박영규 Park Young-gyu	moving	-14.0K	₩8,238	+46.8%	₩115M ($80K)
2024-08-12	BUY	기타	박영규 Park Young-gyu	moving	120	₩6,303	-30.4%	₩756K ($525)
2024-07-01	BUY	Market Buy	연제량 amount of smoke	Internal director	9.5K	₩4,425	-0.9%	₩42M ($29K)
2024-06-03	SELL	Market Sell	박영규 Park Young-gyu	moving	-5.0K	₩4,559	+3.8%	₩23M ($16K)
2024-04-01	BUY	주식매수청구권 행사	박영규 Park Young-gyu	moving	18.9K	₩4,969	-11.8%	₩94M ($65K)
2024-04-01	BUY	주식매수선택권	송봉호 Song Bong-ho	Managing Director	86.6K	₩4,969	-11.8%	₩430M ($299K)
2024-03-31	BUY	주식매수청구권 행사	정병찬 Byeongchan Jeong	CEO	100.0K	₩4,969	-11.8%	₩497M ($345K)
2024-02-08	BUY	신규상장	송봉호 Song Bong-ho	Managing Director	5.5K	₩6,096	-28.1%	₩34M ($23K)

Frequently asked questions

Who has been buying Blue MTech stock?: 3 distinct insiders have filed 4 disclosed insider purchases in Blue MTech (439580), most recently on 2026-05-25. 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 Blue MTech have?: Blue MTech has 4 buy-side and 7 sell-side disclosures on record, covering ₩631M ($439K) in total reported value, spanning 2024-02-08 to 2026-05-25.
Where does StockDrifts get Blue MTech 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 Blue MTech. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.