Who has been buying Core Line Soft stock?

2 distinct insiders have filed 96 disclosed insider purchases in Core Line Soft (384470), most recently on 2026-06-25. 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 Core Line Soft have?

Core Line Soft has 96 buy-side and 2 sell-side disclosures on record, covering ₩132M ($92K) in total reported value, spanning 2023-10-04 to 2026-06-25.

Where does StockDrifts get Core Line Soft 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.

Core Line Soft 384470

Company

코어라인소프트Core Line Soft

Insiders

Buys

Total Value

₩132M ($92K)

Avg Return

-10.75%

Last Filing

2026-06-25

Core Line Soft (384470) has 96 disclosed insider purchases and 2 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩132M ($92K) in reported transaction value. The earliest filing StockDrifts holds for Core Line Soft is dated 2023-10-04; the most recent is 2026-06-25. 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 -10.75%, 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
2026-07-30	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	24	₩2,310	+11.9%	₩55K ($38)
2026-07-30	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	3	₩2,310	+11.9%	₩7K ($5)
2026-07-30	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	2	₩2,310	+11.9%	₩5K ($3)
2026-07-30	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	30	₩2,310	+11.9%	₩69K ($48)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩2,495	+3.6%	₩244K ($169)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩2,495	+3.6%	₩245K ($170)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	399	₩2,495	+3.6%	₩996K ($691)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩2,495	+3.6%	₩249K ($173)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩2,495	+3.6%	₩247K ($171)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩2,495	+3.6%	₩246K ($171)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩2,495	+3.6%	₩245K ($170)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩2,495	+3.6%	₩246K ($170)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	9	₩2,495	+3.6%	₩22K ($15)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	44	₩2,495	+3.6%	₩110K ($76)
2026-07-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	56	₩2,495	+3.6%	₩140K ($97)
2026-07-28	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	91	₩2,750	-6.0%	₩252K ($175)
2026-07-13	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	13	₩2,855	-9.5%	₩37K ($26)
2026-07-13	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩2,855	-9.5%	₩286K ($198)
2026-07-03	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	44	₩3,025	-14.6%	₩128K ($89)
2026-07-03	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	40	₩3,025	-14.6%	₩116K ($81)
2026-07-03	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	10	₩3,025	-14.6%	₩29K ($20)
2026-07-03	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	6	₩3,025	-14.6%	₩18K ($12)
2026-06-26	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	50	₩2,790	-7.3%	₩137K ($95)
2026-06-25	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	461	₩2,930	-4.8%	₩1M ($938)
2026-06-24	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	93	₩3,000	-7.0%	₩279K ($194)
2026-06-23	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	20	₩3,030	-7.9%	₩61K ($42)
2026-06-22	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	153	₩3,130	-10.9%	₩479K ($333)
2026-06-17	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	147	₩3,440	-18.9%	₩506K ($351)
2026-06-15	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	2	₩3,350	-16.7%	₩7K ($5)
2026-06-11	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	149	₩3,300	-15.4%	₩492K ($341)
2026-06-10	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	316	₩3,175	-12.1%	₩1M ($697)
2026-06-09	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	174	₩2,955	-5.6%	₩514K ($357)
2026-06-05	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	240	₩3,225	+0.0%	₩774K ($538)
2026-06-04	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	560	₩2,830	+14.0%	₩2M ($1K)
2026-06-02	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	510	₩2,860	+12.8%	₩1M ($1K)
2026-06-01	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	200	₩2,805	+15.0%	₩561K ($390)
2026-05-29	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	450	₩2,905	+11.0%	₩1M ($908)
2026-05-27	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	45	₩3,250	-0.8%	₩146K ($102)
2026-05-22	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	160	₩3,565	-9.5%	₩570K ($396)
2026-05-21	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	5	₩3,395	-5.0%	₩17K ($12)
2026-05-20	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	240	₩3,350	-3.7%	₩804K ($558)
2026-05-19	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	100	₩3,445	-6.4%	₩345K ($239)
2026-05-18	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	430	₩3,580	-9.9%	₩2M ($1K)
2026-05-12	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	1.1K	₩3,350	+8.1%	₩4M ($2K)
2026-05-12	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	15	₩3,350	+8.1%	₩50K ($35)
2026-05-11	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	569	₩3,515	+3.0%	₩2M ($1K)
2026-05-08	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	32	₩3,635	-0.4%	₩116K ($81)
2026-05-08	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	1.3K	₩3,635	-0.4%	₩5M ($3K)
2026-05-07	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	136	₩3,600	+0.6%	₩490K ($340)
2026-05-06	BUY	Market Buy	정우석 Jung Woo-seok	Management Division Representative	290	₩3,680	-1.6%	₩1M ($741)

Showing the 50 most recent of 149 filings.

Frequently asked questions

Who has been buying Core Line Soft stock?: 2 distinct insiders have filed 96 disclosed insider purchases in Core Line Soft (384470), most recently on 2026-06-25. 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 Core Line Soft have?: Core Line Soft has 96 buy-side and 2 sell-side disclosures on record, covering ₩132M ($92K) in total reported value, spanning 2023-10-04 to 2026-06-25.
Where does StockDrifts get Core Line Soft 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 Core Line Soft. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.