Who has been buying Sajo Industry stock?

3 distinct insiders have filed 21 disclosed insider purchases in Sajo Industry (007160), most recently on 2026-06-29. 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 Sajo Industry have?

Sajo Industry has 21 buy-side and 1 sell-side disclosures on record, covering ₩1.9B ($1.4M) in total reported value, spanning 2024-04-29 to 2026-06-29.

Where does StockDrifts get Sajo Industry 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.

Sajo Industry 007160

Company

사조산업Sajo Industry

Insiders

Buys

Total Value

₩1.9B ($1.4M)

Avg Return

+57.72%

Last Filing

2026-06-29

Sajo Industry (007160) has 21 disclosed insider purchases and 1 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩1.9B ($1.4M) in reported transaction value. The earliest filing StockDrifts holds for Sajo Industry is dated 2024-04-29; the most recent is 2026-06-29. 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 +57.72%, 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
2026-07-31	BUY	Market Buy	사조시스템즈 Sajo Systems	-	4.0K	₩47,450	+11.1%	₩173M ($120K)
2026-07-30	BUY	Market Buy	사조시스템즈 Sajo Systems	-	3.0K	₩47,450	+11.1%	₩136M ($95K)
2026-06-29	BUY	Market Buy	사조시스템즈 Sajo Systems	-	4.4K	-	-	-
2026-06-26	BUY	Market Buy	사조시스템즈 Sajo Systems	-	600	-	-	-
2026-06-25	BUY	Market Buy	사조시스템즈 Sajo Systems	-	4.6K	-	-	-
2025-06-02	BUY	시간외매매	사조시스템즈 Sajo Systems	-	7.0K	₩49,650	+30.9%	₩348M ($241K)
2024-08-13	SELL	Market Sell	임태기 Lim Tae-gi	Managing Director	-1.0K	₩69,200	+6.1%	₩69M ($48K)
2024-08-07	BUY	Market Buy	사조시스템즈 Sajo Systems	-	6.5K	₩49,350	+31.7%	₩321M ($223K)
2024-08-06	BUY	Market Buy	사조시스템즈 Sajo Systems	-	7.8K	₩46,250	+40.5%	₩362M ($252K)
2024-08-05	BUY	Market Buy	사조시스템즈 Sajo Systems	-	1.9K	₩44,750	+45.3%	₩84M ($58K)
2024-08-01	BUY	Market Buy	사조시스템즈 Sajo Systems	-	946	₩46,750	+39.0%	₩44M ($31K)
2024-07-31	BUY	Market Buy	사조시스템즈 Sajo Systems	-	1.6K	₩46,600	+39.5%	₩75M ($52K)
2024-07-30	BUY	Market Buy	사조시스템즈 Sajo Systems	-	2.7K	₩45,550	+42.7%	₩122M ($85K)
2024-07-29	BUY	Market Buy	사조시스템즈 Sajo Systems	-	10.9K	₩45,650	+42.4%	₩497M ($345K)
2024-07-26	BUY	Market Buy	사조시스템즈 Sajo Systems	-	3.6K	₩44,850	+44.9%	₩161M ($112K)
2024-06-10	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	590	₩37,650	+72.6%	₩22M ($15K)
2024-06-07	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	500	₩36,550	+77.8%	₩18M ($13K)
2024-06-05	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	500	₩36,900	+76.2%	₩18M ($13K)
2024-05-09	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	200	₩37,050	+75.4%	₩7M ($5K)
2024-05-08	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	269	₩36,950	+75.9%	₩10M ($7K)
2024-05-07	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	650	₩36,700	+77.1%	₩24M ($17K)
2024-05-03	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	450	₩36,800	+76.6%	₩17M ($12K)
2024-05-02	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	630	₩36,650	+77.3%	₩23M ($16K)
2024-04-30	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	1.4K	₩36,750	+76.9%	₩51M ($36K)
2024-04-29	BUY	Market Buy	주지홍 Joo Ji-hong	vice president	500	₩36,400	+78.6%	₩18M ($13K)

Frequently asked questions

Who has been buying Sajo Industry stock?: 3 distinct insiders have filed 21 disclosed insider purchases in Sajo Industry (007160), most recently on 2026-06-29. 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 Sajo Industry have?: Sajo Industry has 21 buy-side and 1 sell-side disclosures on record, covering ₩1.9B ($1.4M) in total reported value, spanning 2024-04-29 to 2026-06-29.
Where does StockDrifts get Sajo Industry 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 Sajo Industry. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.