Who has been buying Woosung Materials stock?

1 distinct insiders have filed 41 disclosed insider purchases in Woosung Materials (011300), most recently on 2026-05-07. 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 Woosung Materials have?

Woosung Materials has 41 buy-side and 6 sell-side disclosures on record, covering ₩594M ($413K) in total reported value, spanning 2024-12-27 to 2026-05-07.

Where does StockDrifts get Woosung Materials 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.

Woosung Materials 011300

Company

우성머티리얼스Woosung Materials

Insiders

Buys

Total Value

₩594M ($413K)

Avg Return

+6.51%

Last Filing

2026-05-07

Woosung Materials (011300) has 41 disclosed insider purchases and 6 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩594M ($413K) in reported transaction value. The earliest filing StockDrifts holds for Woosung Materials is dated 2024-12-27; the most recent is 2026-05-07. 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 +6.51%, 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
2026-05-07	BUY	Market Buy	임종찬 Jongchan Lim	CEO	2.1K	₩2,900	-8.1%	₩6M ($4K)
2026-03-03	SELL	기타	상상인플러스저축은행 Sangsangin Plus Savings Bank	-	-16.8M	₩361	+1.9%	₩6.1B ($4.2M)
2026-01-23	BUY	Market Buy	임종찬 Jongchan Lim	CEO	32.0K	₩386	+12.9%	₩12M ($9K)
2026-01-22	BUY	Market Buy	임종찬 Jongchan Lim	CEO	111.5K	₩375	+16.3%	₩42M ($29K)
2026-01-21	BUY	Market Buy	임종찬 Jongchan Lim	CEO	124.5K	₩374	+16.6%	₩47M ($32K)
2026-01-20	BUY	Market Buy	임종찬 Jongchan Lim	CEO	147.5K	₩375	+16.3%	₩55M ($38K)
2026-01-16	BUY	Market Buy	임종찬 Jongchan Lim	CEO	10.0K	₩360	+21.1%	₩4M ($3K)
2026-01-15	BUY	Market Buy	임종찬 Jongchan Lim	CEO	184.5K	₩365	+19.4%	₩67M ($47K)
2026-01-14	BUY	Market Buy	임종찬 Jongchan Lim	CEO	45.0K	₩363	+20.1%	₩16M ($11K)
2026-01-13	BUY	Market Buy	임종찬 Jongchan Lim	CEO	85.0K	₩370	+17.8%	₩31M ($22K)
2026-01-12	BUY	Market Buy	임종찬 Jongchan Lim	CEO	110.0K	₩365	+19.4%	₩40M ($28K)
2026-01-09	BUY	Market Buy	임종찬 Jongchan Lim	CEO	88.9K	₩371	+17.5%	₩33M ($23K)
2026-01-08	BUY	Market Buy	임종찬 Jongchan Lim	CEO	58.0K	₩360	+21.1%	₩21M ($15K)
2026-01-02	BUY	Market Buy	임종찬 Jongchan Lim	CEO	700	₩354	+23.2%	₩248K ($172)
2025-12-22	BUY	Market Buy	임종찬 Jongchan Lim	CEO	400	₩363	+20.1%	₩145K ($101)
2025-12-17	BUY	Market Buy	임종찬 Jongchan Lim	CEO	500	₩374	+16.6%	₩187K ($130)
2025-12-12	BUY	Market Buy	임종찬 Jongchan Lim	CEO	500	₩372	+17.2%	₩186K ($129)
2025-12-03	BUY	행사가액조정	상상인플러스저축은행 Sangsangin Plus Savings Bank	-	2.6M	-	-	-
2025-11-27	BUY	Market Buy	임종찬 Jongchan Lim	CEO	500	₩391	+11.5%	₩196K ($136)
2025-11-11	BUY	Market Buy	임종찬 Jongchan Lim	CEO	200	₩363	+20.1%	₩73K ($50)
2025-11-06	BUY	Market Buy	임종찬 Jongchan Lim	CEO	300	₩364	+19.8%	₩109K ($76)
2025-11-05	BUY	Market Buy	임종찬 Jongchan Lim	CEO	65.4K	₩369	+18.2%	₩24M ($17K)
2025-11-04	BUY	Market Buy	임종찬 Jongchan Lim	CEO	376.0K	₩379	+15.0%	₩142M ($99K)
2025-10-30	BUY	Market Buy	임종찬 Jongchan Lim	CEO	900	₩378	+15.3%	₩340K ($236)
2025-09-10	BUY	Market Buy	임종찬 Jongchan Lim	CEO	100	₩423	+3.1%	₩42K ($29)
2025-09-08	BUY	Market Buy	임종찬 Jongchan Lim	CEO	500	₩444	-1.8%	₩222K ($154)
2025-09-04	BUY	Market Buy	임종찬 Jongchan Lim	CEO	500	₩459	-5.0%	₩230K ($159)
2025-08-20	BUY	Market Buy	임종찬 Jongchan Lim	CEO	900	₩406	+7.4%	₩365K ($254)
2025-08-04	BUY	행사가액조정	상상인플러스저축은행 Sangsangin Plus Savings Bank	-	1.8M	-	-	-
2025-06-30	BUY	Market Buy	임종찬 Jongchan Lim	CEO	501	₩464	-6.0%	₩232K ($161)
2025-06-30	BUY	Market Buy	임종찬 Jongchan Lim	CEO	142	₩464	-6.0%	₩66K ($46)
2025-06-30	BUY	Market Buy	임종찬 Jongchan Lim	CEO	100	₩464	-6.0%	₩46K ($32)
2025-06-30	BUY	Market Buy	임종찬 Jongchan Lim	CEO	657	₩464	-6.0%	₩305K ($212)
2025-06-30	BUY	Market Buy	임종찬 Jongchan Lim	CEO	600	₩464	-6.0%	₩278K ($193)
2025-06-24	BUY	Market Buy	임종찬 Jongchan Lim	CEO	8.7K	₩476	-8.4%	₩4M ($3K)
2025-06-23	BUY	Market Buy	임종찬 Jongchan Lim	CEO	12.9K	₩462	-5.6%	₩6M ($4K)
2025-06-11	BUY	Market Buy	임종찬 Jongchan Lim	CEO	16.4K	₩498	-12.4%	₩8M ($6K)
2025-06-09	BUY	Market Buy	임종찬 Jongchan Lim	CEO	15.7K	₩500	-12.8%	₩8M ($5K)
2025-06-05	SELL	Market Sell	임종찬 Jongchan Lim	CEO	-3.0K	₩519	+16.0%	₩2M ($1K)
2025-06-04	BUY	Market Buy	임종찬 Jongchan Lim	CEO	3.0K	₩492	-11.4%	₩1M ($1K)
2025-05-20	SELL	Market Sell	임종찬 Jongchan Lim	CEO	-3.0K	₩484	+9.9%	₩1M ($1K)
2025-05-19	BUY	Market Buy	임종찬 Jongchan Lim	CEO	3.0K	₩499	-12.6%	₩1M ($1K)
2025-03-31	BUY	제3자배정유상증자	상상인플러스저축은행 Sangsangin Plus Savings Bank	-	20.0M	₩613	-28.9%	₩12.3B ($8.5M)
2025-03-31	BUY	기타	상상인플러스저축은행 Sangsangin Plus Savings Bank	-	12.5M	₩613	-28.9%	₩7.6B ($5.3M)
2025-03-28	BUY	제3자배정유상증자	임종찬 Jongchan Lim	CEO	50.0K	₩646	-32.5%	₩32M ($22K)
2025-02-27	SELL	Market Sell	임종찬 Jongchan Lim	CEO	-1.5K	₩628	+30.6%	₩942K ($654)
2025-02-27	BUY	Market Buy	임종찬 Jongchan Lim	CEO	1.5K	₩628	-30.6%	₩942K ($654)
2025-02-14	BUY	주식분할	더블유에스 W.S.	-	21.0M	₩720	-39.4%	₩15.1B ($10.5M)
2025-02-03	SELL	자본감소	더블유에스 W.S.	-	-15.8M	₩720	+39.4%	₩11.3B ($7.9M)
2025-01-22	SELL	Market Sell	임종찬 Jongchan Lim	CEO	-1.8K	₩614	+29.0%	₩1M ($762)

Showing the 50 most recent of 57 filings.

Frequently asked questions

Who has been buying Woosung Materials stock?: 1 distinct insiders have filed 41 disclosed insider purchases in Woosung Materials (011300), most recently on 2026-05-07. 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 Woosung Materials have?: Woosung Materials has 41 buy-side and 6 sell-side disclosures on record, covering ₩594M ($413K) in total reported value, spanning 2024-12-27 to 2026-05-07.
Where does StockDrifts get Woosung Materials 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 Woosung Materials. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.