Who has been buying STX Engine stock?

1 distinct insiders have filed 95 disclosed insider purchases in STX Engine (077970), most recently on 2025-09-25. 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 STX Engine have?

STX Engine has 95 buy-side and 83 sell-side disclosures on record, covering ₩82.8B ($57.5M) in total reported value, spanning 2024-03-20 to 2025-09-25.

Where does StockDrifts get STX Engine 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.

STX Engine 077970

Company

STX엔진STX Engine

Insiders

Buys

Total Value

₩82.8B ($57.5M)

Avg Return

+4.67%

Last Filing

2025-09-25

STX Engine (077970) has 95 disclosed insider purchases and 83 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩82.8B ($57.5M) in reported transaction value. The earliest filing StockDrifts holds for STX Engine is dated 2024-03-20; the most recent is 2025-09-25. 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 +4.67%, 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
2025-09-25	SELL	시간외매매	유암코기업리바운스제팔차기업재무안정사모투자 Yuamco Corporate Rebounce 8th Corporate Financial Stability Private Investment	-	-1.0M	₩39,900	+11.2%	₩39.9B ($27.7M)
2025-08-18	SELL	시간외매매	유암코기업리바운스제팔차기업재무안정사모투자 Yuamco Corporate Rebounce 8th Corporate Financial Stability Private Investment	-	-1.5M	₩38,600	+8.2%	₩57.9B ($40.2M)
2025-06-17	SELL	시간외매매	유암코기업리바운스제팔차기업재무안정사모투자 Yuamco Corporate Rebounce 8th Corporate Financial Stability Private Investment	-	-1.0M	₩24,850	-42.7%	₩24.9B ($17.3M)
2025-04-28	SELL	시간외매매	유암코기업리바운스제팔차기업재무안정사모투자 Yuamco Corporate Rebounce 8th Corporate Financial Stability Private Investment	-	-1.0M	₩25,050	-41.5%	₩25.1B ($17.4M)
2025-04-21	SELL	Market Sell	국민연금공단 National Pension Service	-	-13.9K	₩21,750	-63.0%	₩303M ($211K)
2025-04-18	BUY	Market Buy	국민연금공단 National Pension Service	-	2.2K	₩22,600	+56.9%	₩49M ($34K)
2025-04-17	SELL	Market Sell	국민연금공단 National Pension Service	-	-7.7K	₩22,300	-59.0%	₩173M ($120K)
2025-04-16	SELL	Market Sell	국민연금공단 National Pension Service	-	-22.8K	₩21,900	-61.9%	₩499M ($346K)
2025-04-16	BUY	Market Buy	국민연금공단 National Pension Service	-	731	₩21,900	+61.9%	₩16M ($11K)
2025-04-15	SELL	Market Sell	국민연금공단 National Pension Service	-	-34.7K	₩22,350	-58.6%	₩775M ($538K)
2025-04-15	BUY	Market Buy	국민연금공단 National Pension Service	-	24.0K	₩22,350	+58.6%	₩536M ($373K)
2025-04-14	BUY	Market Buy	국민연금공단 National Pension Service	-	2.9K	₩21,900	+61.9%	₩63M ($44K)
2025-04-14	SELL	Market Sell	국민연금공단 National Pension Service	-	-11.9K	₩21,900	-61.9%	₩261M ($181K)
2025-04-11	BUY	Market Buy	국민연금공단 National Pension Service	-	31	₩21,550	+64.5%	₩668K ($464)
2025-04-10	SELL	Market Sell	국민연금공단 National Pension Service	-	-12.2K	₩20,350	-74.2%	₩248M ($172K)
2025-04-10	BUY	Market Buy	국민연금공단 National Pension Service	-	48.4K	₩20,350	+74.2%	₩985M ($684K)
2025-04-09	SELL	Market Sell	국민연금공단 National Pension Service	-	-4.2K	₩19,090	-85.7%	₩80M ($56K)
2025-04-09	BUY	Market Buy	국민연금공단 National Pension Service	-	27.5K	₩19,090	+85.7%	₩524M ($364K)
2025-04-08	BUY	Market Buy	국민연금공단 National Pension Service	-	1.8K	₩19,230	+84.3%	₩34M ($24K)
2025-04-07	BUY	Market Buy	국민연금공단 National Pension Service	-	48.1K	₩18,310	+93.6%	₩881M ($611K)
2025-04-04	SELL	Market Sell	국민연금공단 National Pension Service	-	-7.2K	₩20,200	-75.5%	₩145M ($101K)
2025-04-03	BUY	Market Buy	국민연금공단 National Pension Service	-	35	₩20,700	+71.3%	₩725K ($503)
2025-04-02	BUY	Market Buy	국민연금공단 National Pension Service	-	30.0K	₩20,500	+72.9%	₩616M ($428K)
2025-04-02	SELL	Market Sell	국민연금공단 National Pension Service	-	-6.0K	₩20,500	-72.9%	₩122M ($85K)
2025-04-01	BUY	Market Buy	국민연금공단 National Pension Service	-	46.5K	₩21,300	+66.4%	₩990M ($688K)
2025-04-01	SELL	Market Sell	국민연금공단 National Pension Service	-	-16.3K	₩21,300	-66.4%	₩347M ($241K)
2025-03-31	BUY	신규주요주주	국민연금공단 National Pension Service	-	74.3K	₩20,800	+70.4%	₩1.5B ($1.1M)
2025-03-31	SELL	Market Sell	국민연금공단 National Pension Service	-	-28.2K	₩20,800	-70.4%	₩588M ($408K)
2025-03-31	BUY	신규보고	국민연금공단 National Pension Service	-	2.3M	₩20,800	+70.4%	₩47.1B ($32.7M)
2025-03-26	BUY	기타	유암코기업리바운스제팔차기업재무안정사모투자 Yuamco Corporate Rebounce 8th Corporate Financial Stability Private Investment	-	17.1M	₩23,200	+52.8%	₩397.6B ($276.1M)
2025-03-26	SELL	전환등	유암코기업리바운스제팔차기업재무안정사모투자 Yuamco Corporate Rebounce 8th Corporate Financial Stability Private Investment	-	-12.5M	₩23,200	-52.8%	₩289.8B ($201.3M)
2025-03-26	SELL	전환등	유암코기업리바운스제팔차기업재무안정사모투자 Yuamco Corporate Rebounce 8th Corporate Financial Stability Private Investment	-	-4.6M	₩23,200	-52.8%	₩107.8B ($74.9M)
2025-03-24	SELL	Market Sell	국민연금공단 National Pension Service	-	-110.5K	₩24,650	-43.8%	₩2.7B ($1.9M)
2025-03-21	BUY	Market Buy	국민연금공단 National Pension Service	-	5.9K	₩25,350	+39.8%	₩149M ($104K)
2025-03-20	BUY	Market Buy	국민연금공단 National Pension Service	-	2.0K	₩24,500	+44.7%	₩48M ($33K)
2025-03-20	SELL	Market Sell	국민연금공단 National Pension Service	-	-29.0K	₩24,500	-44.7%	₩711M ($494K)
2025-03-17	BUY	Market Buy	국민연금공단 National Pension Service	-	58	₩25,750	+37.7%	₩1M ($1K)
2025-03-14	SELL	Market Sell	국민연금공단 National Pension Service	-	-28.2K	₩25,550	-38.8%	₩721M ($500K)
2025-03-13	BUY	Market Buy	국민연금공단 National Pension Service	-	58	₩25,450	+39.3%	₩1M ($1K)
2025-03-12	SELL	Market Sell	국민연금공단 National Pension Service	-	-5.2K	₩24,400	-45.3%	₩127M ($88K)
2025-03-11	SELL	Market Sell	국민연금공단 National Pension Service	-	-10.6K	₩26,150	-35.6%	₩276M ($192K)
2025-03-11	BUY	Market Buy	국민연금공단 National Pension Service	-	36.9K	₩26,150	+35.6%	₩966M ($671K)
2025-03-10	SELL	Market Sell	국민연금공단 National Pension Service	-	-17.2K	₩27,250	-30.1%	₩468M ($325K)
2025-03-07	BUY	Market Buy	국민연금공단 National Pension Service	-	27	₩26,950	+31.5%	₩728K ($505)
2025-03-07	SELL	Market Sell	국민연금공단 National Pension Service	-	-316	₩26,950	-31.5%	₩9M ($6K)
2025-03-06	SELL	Market Sell	국민연금공단 National Pension Service	-	-21.7K	₩26,100	-35.8%	₩565M ($393K)
2025-03-06	BUY	Market Buy	국민연금공단 National Pension Service	-	49.1K	₩26,100	+35.8%	₩1.3B ($889K)
2025-03-05	SELL	Market Sell	국민연금공단 National Pension Service	-	-8.5K	₩26,100	-35.8%	₩221M ($154K)
2025-03-05	BUY	Market Buy	국민연금공단 National Pension Service	-	2.5K	₩26,100	+35.8%	₩66M ($46K)
2025-03-04	SELL	Market Sell	국민연금공단 National Pension Service	-	-92.1K	₩25,800	-37.4%	₩2.4B ($1.7M)

Showing the 50 most recent of 197 filings.

Frequently asked questions

Who has been buying STX Engine stock?: 1 distinct insiders have filed 95 disclosed insider purchases in STX Engine (077970), most recently on 2025-09-25. 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 STX Engine have?: STX Engine has 95 buy-side and 83 sell-side disclosures on record, covering ₩82.8B ($57.5M) in total reported value, spanning 2024-03-20 to 2025-09-25.
Where does StockDrifts get STX Engine 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 STX Engine. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.