Who has been buying Smack stock?

8 distinct insiders have filed 31 disclosed insider purchases in Smack (099440), most recently on 2026-07-13. 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 Smack have?

Smack has 31 buy-side and 0 sell-side disclosures on record, covering ₩10.9B ($7.6M) in total reported value, spanning 2024-05-31 to 2026-07-13.

Where does StockDrifts get Smack 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.

Smack 099440

Company

스맥Smack

Insiders

Buys

Total Value

₩10.9B ($7.6M)

Avg Return

+19.33%

Last Filing

2026-07-13

Smack (099440) has 31 disclosed insider purchases and 0 disclosed disposals on record, filed by 8 distinct insiders. Together those filings cover ₩10.9B ($7.6M) in reported transaction value. The earliest filing StockDrifts holds for Smack is dated 2024-05-31; the most recent is 2026-07-13. 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 +19.33%, 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
2026-07-21	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	5.0K	₩2,990	+12.4%	₩13M ($9K)
2026-07-20	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	58.5K	₩2,805	+19.8%	₩159M ($110K)
2026-07-16	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	60.3K	₩2,605	+29.0%	₩154M ($107K)
2026-07-13	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	38.9K	₩2,535	+2.8%	₩104M ($72K)
2026-07-10	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	6.0K	₩2,760	-5.6%	₩16M ($11K)
2026-07-08	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	11.1K	₩2,730	-4.6%	₩30M ($21K)
2026-07-07	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	9.3K	₩2,825	-7.8%	₩25M ($17K)
2026-06-30	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	16.1K	₩2,715	+0.0%	₩44M ($30K)
2026-06-29	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	28.3K	₩2,810	-3.4%	₩80M ($55K)
2026-06-24	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	38.7K	₩2,845	-8.8%	₩110M ($76K)
2026-06-23	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	28.0K	₩2,800	-7.3%	₩78M ($54K)
2026-06-22	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	22.0K	₩2,990	-13.2%	₩66M ($46K)
2026-06-17	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	38.9K	₩3,330	-22.1%	₩130M ($90K)
2026-06-16	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	30.0K	₩3,380	-8.9%	₩101M ($70K)
2026-06-15	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	62.1K	₩3,345	-7.9%	₩208M ($144K)
2026-06-11	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	41.6K	₩3,245	-5.1%	₩135M ($94K)
2026-06-10	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	50.0K	₩3,220	-4.3%	₩161M ($112K)
2026-06-05	BUY	Market Buy	최영섭 Youngseop Choi	Chairman	86.3K	₩3,395	+0.0%	₩293M ($203K)
2026-06-05	BUY	Market Buy	권오혁 Kwon Oh-hyuk	CEO	43.5K	₩3,395	+0.0%	₩148M ($102K)
2026-04-24	SELL	시간외매매	SNT홀딩스 SNT Holdings	-	-8.8M	₩4,330	+0.0%	₩37.9B ($26.4M)
2026-04-22	BUY	신규주요주주	SNT모티브 SNT motif	-	14.0M	₩4,340	-0.2%	₩60.6B ($42.1M)
2026-03-20	BUY	Market Buy	최용석 Yongseok Choi	moving	8.9K	-	-	-
2026-03-20	BUY	Market Buy	손윤섭 Son Yunseop	moving	3.6K	-	-	-
2026-03-19	BUY	Market Buy	류재희 Ryu Jae-hee	vice president	18.3K	-	-	-
2026-03-19	BUY	Market Buy	박진성 Jinseong Park	Managing Director	9.3K	-	-	-
2025-12-30	BUY	Market Buy	권오혁 Kwon Oh-hyuk	vice president	276.1K	₩6,790	-1.9%	₩1.9B ($1.3M)
2025-12-03	BUY	PROGRAM	권오혁 Kwon Oh-hyuk	vice president	95.6K	₩6,860	-2.9%	₩656M ($456K)
2025-11-28	BUY	PROGRAM	최영섭 Youngseop Choi	CEO	340.0K	₩5,280	+26.1%	₩1.8B ($1.2M)
2025-11-27	BUY	PROGRAM	고동연 Go Dong-yeon	moving	41.9K	₩5,040	+32.1%	₩211M ($147K)
2025-11-27	BUY	PROGRAM	류재희 Ryu Jae-hee	Managing Director	83.4K	₩5,040	+32.1%	₩420M ($292K)
2025-11-27	BUY	PROGRAM	박종호 Jongho Park	moving	62.8K	₩5,040	+32.1%	₩316M ($220K)
2025-11-27	BUY	PROGRAM	손윤섭 Son Yunseop	moving	62.9K	₩5,040	+32.1%	₩317M ($220K)
2025-11-27	BUY	PROGRAM	최영섭 Youngseop Choi	CEO	340.0K	₩5,040	+32.1%	₩1.7B ($1.2M)
2025-11-27	BUY	PROGRAM	권오혁 Kwon Oh-hyuk	vice president	308.3K	₩5,040	+32.1%	₩1.6B ($1.1M)
2025-11-26	BUY	신규주요주주	SNT홀딩스 SNT Holdings	-	3.7M	₩4,610	+44.5%	₩17.2B ($11.9M)
2025-11-24	BUY	신규보고	SNT홀딩스 SNT Holdings	-	5.6M	₩4,575	+45.6%	₩25.5B ($17.7M)
2025-06-27	BUY	유상신주취득	최영섭 Youngseop Choi	CEO	3.0M	₩3,450	+93.0%	₩10.2B ($7.1M)
2025-04-09	BUY	Market Buy	최영섭 Youngseop Choi	CEO	29.6K	₩2,220	+200.0%	₩66M ($46K)
2025-04-08	BUY	Market Buy	최영섭 Youngseop Choi	CEO	126.0K	₩2,191	+204.0%	₩276M ($192K)
2024-05-31	SELL	임원퇴임	이성재 Seongjae Lee	vice president	-173.8K	₩3,225	-106.5%	₩561M ($389K)

Frequently asked questions

Who has been buying Smack stock?: 8 distinct insiders have filed 31 disclosed insider purchases in Smack (099440), most recently on 2026-07-13. 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 Smack have?: Smack has 31 buy-side and 0 sell-side disclosures on record, covering ₩10.9B ($7.6M) in total reported value, spanning 2024-05-31 to 2026-07-13.
Where does StockDrifts get Smack 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 Smack. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.