Who has been buying Corentec stock?

2 distinct insiders have filed 17 disclosed insider purchases in Corentec (104540), most recently on 2026-06-12. 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 Corentec have?

Corentec has 17 buy-side and 0 sell-side disclosures on record, covering ₩92M ($64K) in total reported value, spanning 2024-06-04 to 2026-06-12.

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.

Corentec 104540

Company

코렌텍Corentec

Insiders

Buys

Total Value

₩92M ($64K)

Avg Return

-5.74%

Last Filing

2026-06-12

Corentec (104540) has 17 disclosed insider purchases and 0 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩92M ($64K) in reported transaction value. The earliest filing StockDrifts holds for Corentec is dated 2024-06-04; the most recent is 2026-06-12. Across these filings the average return since disclosure is -5.74%, 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
2026-06-12	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	1.4K	₩4,155	+2.4%	₩6M ($4K)
2026-06-11	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	600	₩4,150	+2.5%	₩2M ($2K)
2026-06-09	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	1.7K	-	-	-
2026-06-05	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	2.8K	₩4,210	+0.0%	₩12M ($8K)
2026-06-04	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	500	₩4,305	-2.2%	₩2M ($1K)
2026-06-02	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	550	₩4,410	-4.5%	₩2M ($2K)
2026-05-28	BUY	Market Buy	선두훈 Seo Do-hoon	Internal director	1.2K	₩4,680	-10.0%	₩6M ($4K)
2026-05-28	BUY	Market Buy	선두훈 Seo Do-hoon	Internal director	811	₩4,680	-10.0%	₩4M ($3K)
2026-05-28	BUY	Market Buy	선두훈 Seo Do-hoon	Internal director	5	₩4,680	-10.0%	₩23K ($16)
2026-05-28	BUY	Market Buy	선두훈 Seo Do-hoon	Internal director	2.4K	₩4,680	-10.0%	₩11M ($8K)
2026-05-28	BUY	Market Buy	선두훈 Seo Do-hoon	Internal director	3.8K	₩4,680	-10.0%	₩18M ($12K)
2026-05-28	BUY	Market Buy	선두훈 Seo Do-hoon	Internal director	1.8K	₩4,680	-10.0%	₩9M ($6K)
2026-05-28	BUY	Market Buy	선두훈 Seo Do-hoon	Internal director	1.2K	₩4,680	-10.0%	₩6M ($4K)
2026-05-27	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	500	₩4,660	+0.4%	₩2M ($2K)
2026-05-27	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	1.0K	₩4,660	-9.7%	₩5M ($3K)
2026-05-22	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	350	₩5,080	-7.9%	₩2M ($1K)
2026-05-21	BUY	Market Buy	박형철 Park Hyeong-cheol	vice president	1.1K	₩4,810	-2.7%	₩6M ($4K)
2025-11-04	SELL	전환권등소멸	선승훈 Seunghun Seon	Internal director	-361.2K	₩5,670	-21.3%	₩2.0B ($1.4M)
2025-11-04	SELL	전환권등소멸	선경훈 Seon Kyeong-hoon	Internal director	-361.2K	₩5,670	-21.3%	₩2.0B ($1.4M)
2024-12-04	BUY	행사가액조정	선경훈 Seon Kyeong-hoon	Internal director	30.5K	₩5,100	+34.9%	₩156M ($108K)
2024-12-04	BUY	행사가액조정	선승훈 Seunghun Seon	Internal director	30.5K	₩5,100	+34.9%	₩156M ($108K)
2024-09-04	BUY	행사가액조정	선승훈 Seunghun Seon	Internal director	57.4K	₩6,850	+0.4%	₩393M ($273K)
2024-09-04	BUY	행사가액조정	선경훈 Seon Kyeong-hoon	Internal director	57.4K	₩6,850	+0.4%	₩393M ($273K)
2024-07-31	BUY	기타	신태진 Taejin Shin	moving	3.5K	₩7,620	-9.7%	₩27M ($19K)
2024-06-04	BUY	행사가액조정	선경훈 Seon Kyeong-hoon	Internal director	20.4K	₩8,240	-16.5%	₩168M ($117K)
2024-06-04	BUY	행사가액조정	선승훈 Seunghun Seon	Internal director	20.4K	₩8,240	-16.5%	₩168M ($117K)

Frequently asked questions

Who has been buying Corentec stock?: 2 distinct insiders have filed 17 disclosed insider purchases in Corentec (104540), most recently on 2026-06-12. 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 Corentec have?: Corentec has 17 buy-side and 0 sell-side disclosures on record, covering ₩92M ($64K) in total reported value, spanning 2024-06-04 to 2026-06-12.
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.