Who has been buying ALT stock?

8 distinct insiders have filed 23 disclosed insider purchases in ALT (172670), most recently on 2026-07-02. 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 ALT have?

ALT has 23 buy-side and 1 sell-side disclosures on record, covering ₩568M ($395K) in total reported value, spanning 2024-06-07 to 2026-07-02.

Where does StockDrifts get ALT 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.

ALT 172670

Company

에이엘티ALT

Insiders

Buys

Total Value

₩568M ($395K)

Avg Return

+38.69%

Last Filing

2026-07-02

ALT (172670) has 23 disclosed insider purchases and 1 disclosed disposals on record, filed by 8 distinct insiders. Together those filings cover ₩568M ($395K) in reported transaction value. The earliest filing StockDrifts holds for ALT is dated 2024-06-07; the most recent is 2026-07-02. 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 +38.69%, 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
2026-07-02	BUY	Market Buy	천병태 Cheon Byeong-tae	CEO	9.9K	₩9,380	-8.1%	₩93M ($64K)
2026-06-19	BUY	Market Buy	이은철 Euncheol Lee	president	100	-	-	-
2026-06-18	BUY	Market Buy	이은철 Euncheol Lee	president	400	-	-	-
2026-06-17	BUY	Market Buy	이은철 Euncheol Lee	president	2.5K	-	-	-
2025-12-19	BUY	PROGRAM	이태희 Taehee Lee	moving	930	₩10,460	+37.5%	₩10M ($7K)
2025-12-19	BUY	PROGRAM	유현수 Hyeonsoo Yoo	moving	967	₩10,460	+37.5%	₩10M ($7K)
2025-12-19	BUY	PROGRAM	전재국 Jeon Jae-guk	Managing Director	971	₩10,460	+37.5%	₩10M ($7K)
2025-12-19	BUY	PROGRAM	정기춘 Jeong Ki-chun	moving	965	₩10,460	+37.5%	₩10M ($7K)
2025-12-19	BUY	PROGRAM	천성민 Seongmin Cheon	moving	2.0K	₩10,460	+37.5%	₩21M ($15K)
2025-12-19	BUY	PROGRAM	천병태 Cheon Byeong-tae	CEO	4.9K	₩10,460	+37.5%	₩51M ($36K)
2025-12-19	BUY	PROGRAM	연룡모 Yeonryongmo	Managing Director	1.0K	₩10,460	+37.5%	₩11M ($7K)
2025-12-19	BUY	PROGRAM	이은철 Euncheol Lee	president	3.0K	₩10,460	+37.5%	₩31M ($22K)
2025-09-09	BUY	Market Buy	천병태 Cheon Byeong-tae	CEO	364	₩9,000	+59.8%	₩3M ($2K)
2025-09-08	BUY	Market Buy	천병태 Cheon Byeong-tae	CEO	24.2K	₩8,200	+75.4%	₩198M ($138K)
2025-03-17	SELL	Market Sell	유현수 Hyeonsoo Yoo	moving	-1.2K	₩11,360	-26.6%	₩14M ($9K)
2024-12-11	BUY	Market Buy	연룡모 Yeonryongmo	Managing Director	70	₩6,540	+119.9%	₩458K ($318)
2024-12-10	BUY	Market Buy	연룡모 Yeonryongmo	Managing Director	322	₩5,540	+159.6%	₩2M ($1K)
2024-09-04	BUY	Market Buy	연룡모 Yeonryongmo	Managing Director	168	₩9,260	+55.3%	₩2M ($1K)
2024-08-28	BUY	Market Buy	유현수 Hyeonsoo Yoo	moving	1.2K	₩10,240	+40.4%	₩12M ($9K)
2024-08-08	BUY	Market Buy	천성민 Seongmin Cheon	moving	6.0K	₩9,730	+47.8%	₩58M ($41K)
2024-08-01	BUY	Market Buy	연룡모 Yeonryongmo	Managing Director	140	₩12,660	+13.6%	₩2M ($1K)
2024-07-31	BUY	Market Buy	연룡모 Yeonryongmo	Managing Director	100	₩11,940	+20.4%	₩1M ($829)
2024-06-28	BUY	Market Buy	천성민 Seongmin Cheon	moving	1.0K	₩17,420	-17.4%	₩17M ($12K)
2024-06-07	BUY	Market Buy	연룡모 Yeonryongmo	Managing Director	550	₩19,790	-27.3%	₩11M ($8K)

Frequently asked questions

Who has been buying ALT stock?: 8 distinct insiders have filed 23 disclosed insider purchases in ALT (172670), most recently on 2026-07-02. 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 ALT have?: ALT has 23 buy-side and 1 sell-side disclosures on record, covering ₩568M ($395K) in total reported value, spanning 2024-06-07 to 2026-07-02.
Where does StockDrifts get ALT 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 ALT. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.