Who has been buying HS Hyosung Advanced Materials stock?

2 distinct insiders have filed 98 disclosed insider purchases in HS Hyosung Advanced Materials (298050), most recently on 2026-06-05. 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 HS Hyosung Advanced Materials have?

HS Hyosung Advanced Materials has 98 buy-side and 0 sell-side disclosures on record, covering ₩78.1B ($54.2M) in total reported value, spanning 2024-05-14 to 2026-06-05.

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.

HS Hyosung Advanced Materials 298050

Company

HS효성첨단소재HS Hyosung Advanced Materials

Insiders

Buys

Total Value

₩78.1B ($54.2M)

Avg Return

+5.92%

Last Filing

2026-06-05

HS Hyosung Advanced Materials (298050) has 98 disclosed insider purchases and 0 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩78.1B ($54.2M) in reported transaction value. The earliest filing StockDrifts holds for HS Hyosung Advanced Materials is dated 2024-05-14; the most recent is 2026-06-05. Across these filings the average return since disclosure is +5.92%, 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
2026-06-05	BUY	Market Buy	HS효성 HS Hyosung	-	1.0K	₩198,500	+0.0%	₩200M ($139K)
2026-06-01	BUY	Market Buy	HS효성 HS Hyosung	-	732	₩204,500	-2.9%	₩150M ($104K)
2026-05-21	BUY	Market Buy	HS효성 HS Hyosung	-	1.9K	₩213,500	-1.9%	₩412M ($286K)
2026-05-20	BUY	Market Buy	HS효성 HS Hyosung	-	2.3K	₩211,000	-0.7%	₩494M ($343K)
2026-04-06	BUY	Market Buy	HS효성 HS Hyosung	-	2.6K	₩209,000	+4.8%	₩548M ($380K)
2026-04-03	BUY	Market Buy	HS효성 HS Hyosung	-	2.0K	₩210,500	+4.0%	₩421M ($293K)
2026-04-02	BUY	Market Buy	HS효성 HS Hyosung	-	2.4K	₩207,500	+5.5%	₩507M ($352K)
2026-04-01	BUY	Market Buy	HS효성 HS Hyosung	-	1.2K	₩221,500	-1.1%	₩264M ($184K)
2026-03-31	BUY	Market Buy	HS효성 HS Hyosung	-	487	₩220,000	-0.5%	₩107M ($74K)
2026-03-30	BUY	Market Buy	HS효성 HS Hyosung	-	2.4K	₩221,500	-1.1%	₩538M ($374K)
2026-03-25	BUY	Market Buy	HS효성 HS Hyosung	-	4.4K	₩224,500	-2.5%	₩988M ($686K)
2026-03-24	BUY	Market Buy	HS효성 HS Hyosung	-	4.4K	₩219,500	-0.2%	₩971M ($674K)
2026-03-23	BUY	Market Buy	HS효성 HS Hyosung	-	4.5K	₩218,000	+0.5%	₩974M ($676K)
2026-03-20	BUY	Market Buy	HS효성 HS Hyosung	-	4.4K	₩225,500	-2.9%	₩999M ($693K)
2026-03-19	BUY	Market Buy	HS효성 HS Hyosung	-	4.5K	₩221,000	-0.9%	₩996M ($692K)
2026-03-18	BUY	Market Buy	HS효성 HS Hyosung	-	4.7K	₩228,000	-4.0%	₩1.1B ($749K)
2026-03-17	BUY	Market Buy	HS효성 HS Hyosung	-	4.6K	₩219,000	+0.0%	₩1.0B ($697K)
2026-03-16	BUY	Market Buy	HS효성 HS Hyosung	-	4.6K	₩210,000	+4.3%	₩958M ($666K)
2026-03-13	BUY	Market Buy	HS효성 HS Hyosung	-	25	₩218,000	+0.5%	₩5M ($4K)
2026-02-04	BUY	Market Buy	HS효성 HS Hyosung	-	1.7K	₩260,000	-15.8%	₩435M ($302K)
2026-01-28	BUY	Market Buy	HS효성 HS Hyosung	-	5.2K	₩266,500	-17.8%	₩1.4B ($969K)
2026-01-27	BUY	Market Buy	HS효성 HS Hyosung	-	5.5K	₩245,000	-10.6%	₩1.4B ($943K)
2026-01-26	BUY	Market Buy	HS효성 HS Hyosung	-	6.0K	₩228,000	-4.0%	₩1.4B ($950K)
2026-01-23	BUY	Market Buy	HS효성 HS Hyosung	-	3.5K	₩219,500	-0.2%	₩764M ($531K)
2026-01-22	BUY	Market Buy	HS효성 HS Hyosung	-	2.9K	₩217,000	+0.9%	₩623M ($432K)
2026-01-21	BUY	Market Buy	HS효성 HS Hyosung	-	2.0K	₩215,500	+1.6%	₩434M ($301K)
2026-01-20	BUY	Market Buy	HS효성 HS Hyosung	-	5.0K	₩207,000	+5.8%	₩1.0B ($712K)
2026-01-19	BUY	Market Buy	HS효성 HS Hyosung	-	100	₩206,500	+6.0%	₩21M ($14K)
2026-01-16	BUY	Market Buy	HS효성 HS Hyosung	-	3.4K	₩201,500	+8.7%	₩677M ($470K)
2026-01-13	BUY	Market Buy	HS효성 HS Hyosung	-	214	₩191,100	+14.6%	₩41M ($28K)
2026-01-12	BUY	Market Buy	HS효성 HS Hyosung	-	3.8K	₩189,000	+15.9%	₩727M ($505K)
2026-01-09	BUY	Market Buy	HS효성 HS Hyosung	-	5.6K	₩182,900	+19.7%	₩1.0B ($712K)
2025-11-27	BUY	Market Buy	HS효성 HS Hyosung	-	6.1K	₩198,800	+10.2%	₩1.2B ($848K)
2025-11-26	BUY	Market Buy	HS효성 HS Hyosung	-	3.9K	₩200,500	+9.2%	₩776M ($539K)
2025-11-25	BUY	Market Buy	HS효성 HS Hyosung	-	6.1K	₩198,900	+10.1%	₩1.2B ($844K)
2025-11-24	BUY	Market Buy	HS효성 HS Hyosung	-	1.4K	₩197,900	+10.7%	₩273M ($189K)
2025-11-21	BUY	Market Buy	HS효성 HS Hyosung	-	2.5K	₩198,200	+10.5%	₩496M ($344K)
2025-11-20	BUY	Market Buy	HS효성 HS Hyosung	-	4.9K	₩200,000	+9.5%	₩986M ($684K)
2025-11-19	BUY	Market Buy	HS효성 HS Hyosung	-	4.9K	₩198,100	+10.6%	₩978M ($679K)
2025-11-18	BUY	Market Buy	HS효성 HS Hyosung	-	4.8K	₩198,600	+10.3%	₩962M ($668K)
2025-11-17	BUY	Market Buy	HS효성 HS Hyosung	-	3.8K	₩202,500	+8.2%	₩763M ($530K)
2025-11-14	BUY	Market Buy	HS효성 HS Hyosung	-	1.0K	₩201,500	+8.7%	₩206M ($143K)
2025-11-13	BUY	Market Buy	HS효성 HS Hyosung	-	2.8K	₩215,000	+1.9%	₩594M ($412K)
2025-11-12	BUY	Market Buy	HS효성 HS Hyosung	-	2.3K	₩207,000	+5.8%	₩466M ($323K)
2025-11-11	BUY	Market Buy	HS효성 HS Hyosung	-	7.0K	₩199,800	+9.6%	₩1.4B ($968K)
2025-11-10	BUY	Market Buy	HS효성 HS Hyosung	-	3.1K	₩198,600	+10.3%	₩626M ($434K)
2025-11-07	BUY	Market Buy	HS효성 HS Hyosung	-	5.1K	₩194,000	+12.9%	₩990M ($688K)
2025-11-05	BUY	Market Buy	HS효성 HS Hyosung	-	5.4K	₩195,400	+12.1%	₩1.1B ($735K)
2025-09-18	BUY	Market Buy	HS효성 HS Hyosung	-	1.6K	₩193,200	+13.3%	₩300M ($209K)
2025-09-17	BUY	Market Buy	HS효성 HS Hyosung	-	753	₩191,500	+14.4%	₩144M ($100K)

Showing the 50 most recent of 102 filings.

Frequently asked questions

Who has been buying HS Hyosung Advanced Materials stock?: 2 distinct insiders have filed 98 disclosed insider purchases in HS Hyosung Advanced Materials (298050), most recently on 2026-06-05. 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 HS Hyosung Advanced Materials have?: HS Hyosung Advanced Materials has 98 buy-side and 0 sell-side disclosures on record, covering ₩78.1B ($54.2M) in total reported value, spanning 2024-05-14 to 2026-06-05.
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.