Who has been buying K3I stock?

5 distinct insiders have filed 29 disclosed insider purchases in K3I (431190), most recently on 2026-07-03. 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 K3I have?

K3I has 29 buy-side and 0 sell-side disclosures on record, covering ₩305M ($212K) in total reported value, spanning 2024-08-20 to 2026-07-03.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

K3I 431190

Company

케이쓰리아이K3I

Insiders

Buys

Total Value

₩305M ($212K)

Avg Return

-2.90%

Last Filing

2026-07-03

K3I (431190) has 29 disclosed insider purchases and 0 disclosed disposals on record, filed by 5 distinct insiders. Together those filings cover ₩305M ($212K) in reported transaction value. The earliest filing StockDrifts holds for K3I is dated 2024-08-20; the most recent is 2026-07-03. Across these filings the average return since disclosure is -2.90%, 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
2026-09-22	SELL	Market Sell	황경수 Kyungsoo Hwang	moving	-3.2K	₩3,845	-12.0%	₩12M ($9K)
2026-09-15	SELL	Market Sell	황경수 Kyungsoo Hwang	moving	-6.5K	₩3,700	-16.4%	₩24M ($17K)
2026-08-12	BUY	계약중도해지	이재영 Jaeyoung Lee	CEO	2.7K	₩2,745	+0.9%	₩7M ($5K)
2026-08-07	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	40.0K	₩2,500	+10.8%	₩116M ($80K)
2026-07-03	BUY	Market Buy	이현석 Hyunseok Lee	moving	4.2K	₩2,440	-6.2%	₩10M ($7K)
2026-06-30	BUY	Market Buy	박영섭 Youngseop Park	Managing Director	3.1K	₩2,205	+10.7%	₩7M ($5K)
2026-06-29	BUY	Market Buy	황경수 Kyungsoo Hwang	moving	2.3K	₩2,150	+13.5%	₩5M ($3K)
2026-06-29	BUY	Market Buy	박영섭 Youngseop Park	Managing Director	19.7K	₩2,150	+13.5%	₩42M ($29K)
2026-06-26	BUY	Market Buy	황경수 Kyungsoo Hwang	moving	20.4K	₩2,050	+19.0%	₩42M ($29K)
2026-06-10	BUY	기타	이재영 Jaeyoung Lee	CEO	358	₩2,605	+6.3%	₩933K ($648)
2026-03-17	SELL	대여	이재영 Jaeyoung Lee	CEO	-580	₩4,210	+34.2%	₩2M ($2K)
2026-03-04	BUY	기타	이재영 Jaeyoung Lee	CEO	343	₩3,880	-28.6%	₩1M ($924)
2026-02-26	SELL	대여	이재영 Jaeyoung Lee	CEO	-46	₩4,755	+41.8%	₩219K ($152)
2026-02-26	BUY	기타	이재영 Jaeyoung Lee	CEO	200	₩4,755	-41.8%	₩951K ($660)
2026-02-25	BUY	기타	이재영 Jaeyoung Lee	CEO	83	₩4,715	-41.3%	₩391K ($272)
2026-01-20	SELL	대여	이재영 Jaeyoung Lee	CEO	-195	₩5,560	+50.2%	₩1M ($753)
2026-01-19	BUY	기타	이재영 Jaeyoung Lee	CEO	195	₩5,570	-50.3%	₩1M ($754)
2025-08-22	SELL	대여	이재영 Jaeyoung Lee	CEO	-821	-	-	-
2025-08-18	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	10	-	-	-
2025-07-15	BUY	기타	이재영 Jaeyoung Lee	CEO	811	-	-	-
2025-05-23	BUY	Market Buy	이서보 Seobo Lee	Managing Director	20	₩5,950	-17.6%	₩119K ($83)
2025-05-23	SELL	대여	이재영 Jaeyoung Lee	CEO	-100	-	-	-
2025-05-16	BUY	Market Buy	이서보 Seobo Lee	Managing Director	350	₩5,190	-5.6%	₩2M ($1K)
2025-05-13	BUY	Market Buy	이서보 Seobo Lee	Managing Director	600	₩5,620	-12.8%	₩3M ($2K)
2025-04-14	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	100	-	-	-
2025-04-10	BUY	Market Buy	이현석 Hyunseok Lee	moving	1.0K	₩4,130	+18.6%	₩4M ($3K)
2025-04-10	BUY	Market Buy	이현석 Hyunseok Lee	moving	1.0K	₩4,130	+18.6%	₩4M ($3K)
2025-03-18	SELL	대여	이재영 Jaeyoung Lee	CEO	-1.5K	-	-	-
2025-03-13	SELL	대여	이재영 Jaeyoung Lee	CEO	-1.4K	-	-	-
2025-03-04	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	12	-	-	-
2025-02-27	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	25	-	-	-
2025-02-19	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	50	-	-	-
2025-02-18	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	70	-	-	-
2025-02-13	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	75	-	-	-
2025-02-12	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	275	-	-	-
2025-02-11	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	910	-	-	-
2025-02-07	SELL	Market Sell	이재영 Jaeyoung Lee	CEO	-179	-	-	-
2025-02-07	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	1.0K	-	-	-
2025-02-07	BUY	Market Buy	이서보 Seobo Lee	Managing Director	110	₩4,860	+0.8%	₩535K ($371)
2025-02-03	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	507	-	-	-
2025-01-31	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	76	-	-	-
2025-01-23	BUY	Market Buy	이서보 Seobo Lee	Managing Director	669	₩4,820	+1.7%	₩3M ($2K)
2025-01-17	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	50	-	-	-
2025-01-16	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	12	-	-	-
2025-01-14	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	25	-	-	-
2025-01-14	SELL	Market Sell	이재영 Jaeyoung Lee	CEO	-240	-	-	-
2025-01-10	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	45	-	-	-
2025-01-08	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	162	-	-	-
2025-01-07	BUY	Market Buy	이재영 Jaeyoung Lee	CEO	33	-	-	-
2025-01-07	BUY	Market Buy	이현석 Hyunseok Lee	moving	1.3K	₩5,990	-18.2%	₩8M ($5K)

Showing the 50 most recent of 70 filings.

Frequently asked questions

Who has been buying K3I stock?: 5 distinct insiders have filed 29 disclosed insider purchases in K3I (431190), most recently on 2026-07-03. 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 K3I have?: K3I has 29 buy-side and 0 sell-side disclosures on record, covering ₩305M ($212K) in total reported value, spanning 2024-08-20 to 2026-07-03.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.