Who has been buying COSMAX NBT stock?

9 distinct insiders have filed 48 disclosed insider purchases in COSMAX NBT (222040), most recently on 2026-07-01. 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 COSMAX NBT have?

COSMAX NBT has 48 buy-side and 0 sell-side disclosures on record, covering ₩4.2B ($2.9M) in total reported value, spanning 2021-03-12 to 2026-07-01.

Where does StockDrifts get COSMAX NBT 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.

COSMAX NBT 222040

Company

코스맥스엔비티COSMAX NBT

Insiders

Buys

Total Value

₩4.2B ($2.9M)

Avg Return

+17.05%

Last Filing

2026-07-01

COSMAX NBT (222040) has 48 disclosed insider purchases and 0 disclosed disposals on record, filed by 9 distinct insiders. Together those filings cover ₩4.2B ($2.9M) in reported transaction value. The earliest filing StockDrifts holds for COSMAX NBT is dated 2021-03-12; the most recent is 2026-07-01. 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 +17.05%, 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
2026-07-01	BUY	신규보고	김상우 Sangwoo Kim	Managing Director	3.0K	₩6,420	+3.1%	₩19M ($13K)
2026-06-30	BUY	Market Buy	윤원일 Wonil Yoon	president	3.0K	₩6,450	+2.6%	₩19M ($13K)
2026-05-06	BUY	Market Buy	김의택 Kim Eui-taek	Managing Director	1.7K	₩5,010	+56.7%	₩9M ($6K)
2026-04-29	BUY	Market Buy	신봉철 Shin Bong-cheol	Managing Director	4.0K	₩4,870	+6.2%	₩19M ($14K)
2026-04-29	BUY	Market Buy	김혜진 Hyejin Kim	Assistant Managing Director	1.1K	₩4,870	+6.2%	₩6M ($4K)
2026-04-27	BUY	Market Buy	윤성현 Seonghyeon Yoon	Assistant Managing Director	1.0K	₩4,725	+3.1%	₩5M ($3K)
2026-04-27	BUY	Market Buy	김의택 Kim Eui-taek	Managing Director	800	₩4,725	+3.1%	₩4M ($3K)
2026-04-27	BUY	Market Buy	김혜진 Hyejin Kim	Assistant Managing Director	1.0K	₩4,725	+9.4%	₩5M ($3K)
2026-04-23	BUY	Market Buy	김의택 Kim Eui-taek	Managing Director	1.0K	₩4,640	+5.0%	₩5M ($3K)
2026-04-09	BUY	Market Buy	김세혁 Sehyuk Kim	Managing Director	4.6K	₩3,965	+23.8%	₩18M ($13K)
2026-04-08	BUY	Market Buy	김세혁 Sehyuk Kim	Managing Director	425	₩3,905	+25.7%	₩2M ($1K)
2026-03-06	BUY	Market Buy	안재식 Jaesik Ahn	vice president	6.0K	₩3,350	+17.9%	₩20M ($14K)
2026-03-04	BUY	Market Buy	김세혁 Sehyuk Kim	Managing Director	2.8K	₩3,100	+27.4%	₩9M ($6K)
2026-03-03	BUY	Market Buy	김세혁 Sehyuk Kim	Managing Director	219	₩3,280	+20.4%	₩718K ($499)
2026-02-27	BUY	Market Buy	김세혁 Sehyuk Kim	Managing Director	2.0K	₩3,455	+14.3%	₩7M ($5K)
2026-02-27	BUY	Market Buy	신봉철 Shin Bong-cheol	Managing Director	2.9K	₩3,455	+14.3%	₩10M ($7K)
2026-02-09	BUY	Market Buy	김남중 Namjoong Kim	CEO	5.0K	₩3,300	+19.7%	₩17M ($11K)
2026-01-28	BUY	Market Buy	안재식 Jaesik Ahn	vice president	8.0K	₩3,215	+22.9%	₩26M ($18K)
2025-12-08	BUY	Market Buy	김의택 Kim Eui-taek	Managing Director	150	-	-	-
2025-12-05	BUY	Market Buy	김의택 Kim Eui-taek	Managing Director	50	-	-	-
2025-11-26	BUY	Market Buy	김남중 Namjoong Kim	CEO	522	₩3,210	+23.1%	₩2M ($1K)
2025-11-24	BUY	Market Buy	김남중 Namjoong Kim	CEO	6.5K	₩3,295	+19.9%	₩21M ($15K)
2025-11-13	BUY	Market Buy	윤원일 Wonil Yoon	president	5.0K	₩3,045	+29.7%	₩15M ($11K)
2025-11-07	BUY	Market Buy	안재식 Jaesik Ahn	vice president	9.0K	₩3,090	+27.8%	₩28M ($19K)
2025-10-23	BUY	Market Buy	김의택 Kim Eui-taek	Managing Director	100	-	-	-
2025-07-01	BUY	신규보고	김의택 Kim Eui-taek	Assistant Managing Director	900	₩4,955	-20.3%	₩4M ($3K)
2025-04-07	BUY	Market Buy	김남중 Namjoong Kim	CEO	1.0K	₩3,395	+16.4%	₩3M ($2K)
2025-04-03	BUY	Market Buy	김남중 Namjoong Kim	CEO	2.0K	₩3,560	+11.0%	₩7M ($5K)
2025-03-07	BUY	Market Buy	안재식 Jaesik Ahn	(Head of U.S. Corporation)	5.0K	₩3,265	+21.0%	₩16M ($11K)
2025-02-05	BUY	Market Buy	김남중 Namjoong Kim	vice president	5.0K	₩3,050	+29.5%	₩15M ($11K)
2025-01-01	BUY	신규보고	김도형 Dohyung Kim	Assistant Managing Director	189	₩3,165	+24.8%	₩598K ($415)
2025-01-01	BUY	신규보고	김혜진 Hyejin Kim	Assistant Managing Director	3.2K	₩3,165	+24.8%	₩10M ($7K)
2025-01-01	BUY	신규보고	문기화 civilization	Assistant Managing Director	1.0K	₩3,165	+24.8%	₩3M ($2K)
2024-11-28	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	121.0K	₩3,350	+17.9%	₩405M ($281K)
2024-11-27	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	11.3K	₩3,310	+19.3%	₩37M ($26K)
2024-11-14	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	11.3K	₩3,010	+31.2%	₩34M ($24K)
2024-11-13	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	34.3K	₩3,060	+29.1%	₩105M ($73K)
2024-11-12	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	35.5K	₩3,325	+18.8%	₩118M ($82K)
2024-11-11	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	68.3K	₩3,535	+11.7%	₩241M ($168K)
2024-11-08	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	16.3K	₩3,520	+12.2%	₩57M ($40K)
2024-11-07	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	19.8K	₩3,365	+17.4%	₩67M ($46K)
2024-11-06	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	55.7K	₩3,540	+11.6%	₩197M ($137K)
2024-11-05	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	511.4K	₩3,590	+10.0%	₩1.8B ($1.3M)
2024-11-04	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	95.6K	₩3,575	+10.5%	₩342M ($237K)
2024-11-01	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	16.3K	₩3,585	+10.2%	₩58M ($41K)
2024-11-01	BUY	Market Buy	안재식 Jaesik Ahn	vice president	2.7K	₩3,585	+10.2%	₩10M ($7K)
2024-10-31	BUY	Market Buy	안재식 Jaesik Ahn	vice president	2.6K	₩3,700	+6.8%	₩10M ($7K)
2024-10-31	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	31.4K	₩3,700	+6.8%	₩116M ($81K)
2024-10-30	BUY	Market Buy	코스맥스비티아이 COSMAX BTI	-	77.7K	₩3,800	+4.0%	₩295M ($205K)
2024-10-29	BUY	Market Buy	안재식 Jaesik Ahn	vice president	3.0K	₩3,850	+2.6%	₩11M ($8K)

Showing the 50 most recent of 57 filings.

Frequently asked questions

Who has been buying COSMAX NBT stock?: 9 distinct insiders have filed 48 disclosed insider purchases in COSMAX NBT (222040), most recently on 2026-07-01. 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 COSMAX NBT have?: COSMAX NBT has 48 buy-side and 0 sell-side disclosures on record, covering ₩4.2B ($2.9M) in total reported value, spanning 2021-03-12 to 2026-07-01.
Where does StockDrifts get COSMAX NBT 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 COSMAX NBT. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.