Who has been buying JO stock?

13 distinct insiders have filed 0 disclosed insider purchases in JO (418550), most recently on 2026-05-13. 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 JO have?

JO has 0 buy-side and 43 sell-side disclosures on record, covering ₩3.2B ($2.2M) in total reported value, spanning 2024-02-19 to 2026-05-13.

Where does StockDrifts get JO 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.

JO 418550

Company

제이오JO

Insiders

Buys

Total Value

₩3.2B ($2.2M)

Avg Return

+37.64%

Last Filing

2026-05-13

JO (418550) has 0 disclosed insider purchases and 43 disclosed disposals on record, filed by 13 distinct insiders. Together those filings cover ₩3.2B ($2.2M) in reported transaction value. The earliest filing StockDrifts holds for JO is dated 2024-02-19; the most recent is 2026-05-13. 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 +37.64%, 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
2026-05-13	SELL	증여	구민춘 Gu Min-chun	moving	-3.0K	₩11,290	+11.7%	₩34M ($24K)
2026-04-27	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-1.0K	₩12,000	+0.0%	₩12M ($8K)
2026-04-24	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-1.0K	₩12,990	+7.6%	₩13M ($9K)
2026-04-23	SELL	Market Sell	박종호 Jongho Park	vice president	-5.0K	₩13,250	+9.4%	₩66M ($46K)
2026-04-22	SELL	Market Sell	신관식 Shin Kwan-sik	moving	-6.0K	₩13,560	+4.2%	₩81M ($57K)
2026-04-22	SELL	Market Sell	신관식 Shin Kwan-sik	moving	-8.0K	₩13,560	+4.2%	₩108M ($75K)
2026-04-21	SELL	Market Sell	김석주 Seokju Kim	moving	-2.4K	₩14,400	+9.8%	₩35M ($24K)
2026-04-17	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-3.0K	₩9,280	-40.0%	₩28M ($19K)
2025-07-22	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-8.0K	₩8,870	+3.2%	₩71M ($49K)
2025-07-22	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-2.8K	₩8,870	+3.2%	₩25M ($17K)
2025-05-30	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-2.4K	₩8,610	+0.2%	₩21M ($14K)
2025-05-29	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-1.0K	₩8,700	+1.3%	₩9M ($6K)
2025-05-28	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-305	₩8,700	+1.3%	₩3M ($2K)
2025-05-27	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-3.0K	₩8,120	-5.8%	₩24M ($17K)
2025-05-23	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-1.5K	₩8,200	-4.8%	₩12M ($9K)
2025-05-23	SELL	Market Sell	김주희 Joohee Kim	Managing Director	-1.0K	₩8,200	-4.8%	₩8M ($6K)
2025-05-01	BUY	신규선임	추신철 Choo Shin-cheol	Managing Director	543	₩9,170	-6.3%	₩5M ($3K)
2025-04-07	SELL	Market Sell	정훈기 Jeong Hoon-ki	vice president	-2.0K	₩8,670	+0.9%	₩17M ($12K)
2025-04-04	SELL	Market Sell	정훈기 Jeong Hoon-ki	vice president	-1.0K	₩9,560	+10.2%	₩10M ($7K)
2025-03-18	SELL	증여	김석주 Seokju Kim	moving	-1.2K	₩10,970	+21.7%	₩13M ($9K)
2025-03-18	SELL	증여	김석주 Seokju Kim	moving	-1.2K	₩10,970	+21.7%	₩13M ($9K)
2025-03-18	SELL	증여	김석주 Seokju Kim	moving	-1.2K	₩10,970	+21.7%	₩13M ($9K)
2025-01-14	SELL	Market Sell	조휘용 Hwiyong Cho	vice president	-2.0K	₩14,950	+42.5%	₩30M ($21K)
2025-01-07	SELL	Market Sell	구민춘 Gu Min-chun	moving	-500	₩15,170	+43.4%	₩8M ($5K)
2025-01-03	SELL	증여	구민춘 Gu Min-chun	moving	-1.0K	₩14,380	+40.3%	₩14M ($10K)
2025-01-03	SELL	증여	구민춘 Gu Min-chun	moving	-5.0K	₩14,380	+40.3%	₩72M ($50K)
2025-01-03	SELL	증여	구민춘 Gu Min-chun	moving	-1.0K	₩14,380	+40.3%	₩14M ($10K)
2025-01-01	BUY	신규보고	최상균 Choi Sang-gyun	moving	1.4K	₩13,870	-38.1%	₩20M ($14K)
2024-12-03	SELL	증여	박종호 Jongho Park	Managing Director	-1.0K	₩16,200	+47.0%	₩16M ($11K)
2024-12-03	SELL	증여	박종호 Jongho Park	Managing Director	-4.0K	₩16,200	+47.0%	₩65M ($45K)
2024-12-03	SELL	증여	박종호 Jongho Park	Managing Director	-900	₩16,200	+47.0%	₩15M ($10K)
2024-11-15	BUY	PROGRAM	나보성 Navoseong	Managing Director	1.2K	₩14,130	-39.2%	₩17M ($12K)
2024-11-15	BUY	PROGRAM	정훈기 Jeong Hoon-ki	vice president	9.0K	₩14,130	-39.2%	₩127M ($88K)
2024-11-15	BUY	PROGRAM	구민춘 Gu Min-chun	moving	6.0K	₩14,130	-39.2%	₩85M ($59K)
2024-11-15	BUY	PROGRAM	천문수 astronomical tree	Managing Director	24.0K	₩14,130	-39.2%	₩339M ($236K)
2024-11-15	BUY	PROGRAM	송국경 Song Guk-kyung	Managing Director	1.8K	₩14,130	-39.2%	₩25M ($18K)
2024-11-15	BUY	PROGRAM	김석주 Seokju Kim	moving	6.0K	₩14,130	-39.2%	₩85M ($59K)
2024-11-15	BUY	PROGRAM	김길래 Kim Gil-rae	torture	30.0K	₩14,130	-39.2%	₩424M ($294K)
2024-11-15	BUY	PROGRAM	김종명 Jongmyeong Kim	Managing Director	1.8K	₩14,130	-39.2%	₩25M ($18K)
2024-11-15	BUY	PROGRAM	김영일 Kim Young-il	moving	6.0K	₩14,130	-39.2%	₩85M ($59K)
2024-11-15	BUY	PROGRAM	백명진 Baek Myeong-jin	Managing Director	2.4K	₩14,130	-39.2%	₩34M ($24K)
2024-11-15	BUY	PROGRAM	박종호 Jongho Park	Managing Director	30.0K	₩14,130	-39.2%	₩424M ($294K)
2024-11-15	BUY	PROGRAM	박광욱 Park Gwang-wook	torture	1.2K	₩14,130	-39.2%	₩17M ($12K)
2024-11-15	BUY	PROGRAM	신관식 Shin Kwan-sik	moving	6.0K	₩14,130	-39.2%	₩85M ($59K)
2024-11-15	BUY	PROGRAM	양길종 Yang Gil-jong	moving	1.2K	₩14,130	-39.2%	₩17M ($12K)
2024-11-15	BUY	PROGRAM	오광희 Kwanghee Oh	moving	2.4K	₩14,130	-39.2%	₩34M ($24K)
2024-11-15	BUY	PROGRAM	조휘용 Hwiyong Cho	vice president	9.0K	₩14,130	-39.2%	₩127M ($88K)
2024-11-07	SELL	Market Sell	박광욱 Park Gwang-wook	torture	-2.5K	₩18,210	+52.8%	₩46M ($32K)
2024-10-30	SELL	Market Sell	박종호 Jongho Park	Managing Director	-5.0K	₩18,850	+54.4%	₩94M ($65K)
2024-10-30	SELL	Market Sell	박종호 Jongho Park	Managing Director	-5.0K	₩18,850	+54.4%	₩94M ($65K)

Showing the 50 most recent of 103 filings.

Frequently asked questions

Who has been buying JO stock?: 13 distinct insiders have filed 0 disclosed insider purchases in JO (418550), most recently on 2026-05-13. 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 JO have?: JO has 0 buy-side and 43 sell-side disclosures on record, covering ₩3.2B ($2.2M) in total reported value, spanning 2024-02-19 to 2026-05-13.
Where does StockDrifts get JO 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 JO. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.