Who has been buying Silicone Two stock?

9 distinct insiders have filed 5 disclosed insider purchases in Silicone Two (257720), most recently on 2026-04-21. 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 Silicone Two have?

Silicone Two has 5 buy-side and 46 sell-side disclosures on record, covering ₩81.8B ($56.8M) in total reported value, spanning 2024-02-21 to 2026-04-21.

Where does StockDrifts get Silicone Two 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.

Silicone Two 257720

Company

실리콘투Silicone Two

Insiders

Buys

Total Value

₩81.8B ($56.8M)

Avg Return

-33.57%

Last Filing

2026-04-21

Silicone Two (257720) has 5 disclosed insider purchases and 46 disclosed disposals on record, filed by 9 distinct insiders. Together those filings cover ₩81.8B ($56.8M) in reported transaction value. The earliest filing StockDrifts holds for Silicone Two is dated 2024-02-21; the most recent is 2026-04-21. 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 -33.57%, 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
2026-04-21	SELL	증여	최진호 Jinho Choi	Internal director	-10.5K	₩48,650	+0.0%	₩511M ($355K)
2026-04-17	SELL	증여	최진호 Jinho Choi	Internal director	-15.2K	₩47,100	-3.3%	₩716M ($497K)
2026-01-29	SELL	Market Sell	김성운 Seongwoon Kim	representative	-17.0K	₩54,200	+17.0%	₩921M ($640K)
2026-01-28	SELL	Market Sell	김성운 Seongwoon Kim	representative	-34.0K	₩51,300	+12.3%	₩1.7B ($1.2M)
2026-01-28	SELL	Market Sell	백현희 Baek Hyun-hee	Managing Director	-3.8K	₩51,300	+12.3%	₩197M ($137K)
2026-01-26	SELL	Market Sell	김성운 Seongwoon Kim	representative	-40.0K	₩52,500	+14.3%	₩2.1B ($1.5M)
2026-01-23	SELL	Market Sell	김성운 Seongwoon Kim	representative	-96.0K	₩49,300	+8.7%	₩4.7B ($3.3M)
2025-12-17	SELL	증여	김상희 Sanghee Kim	Managing Director	-9.0K	₩41,300	-9.0%	₩372M ($258K)
2025-12-17	SELL	증여	김상희 Sanghee Kim	Managing Director	-9.0K	₩41,300	-9.0%	₩372M ($258K)
2025-08-29	SELL	Market Sell	김성운 Seongwoon Kim	representative	-43.0K	₩44,900	-0.2%	₩1.9B ($1.3M)
2025-08-28	SELL	Market Sell	김성운 Seongwoon Kim	representative	-13.0K	₩45,700	+1.5%	₩594M ($413K)
2025-07-02	SELL	Market Sell	김상희 Sanghee Kim	Managing Director	-20.0K	₩55,900	+19.5%	₩1.1B ($776K)
2025-07-02	SELL	Market Sell	강준규 Kang Jun-gyu	CTO	-15.5K	₩55,900	+19.5%	₩865M ($601K)
2025-07-02	SELL	Market Sell	길남영 Namyoung Gil	Managing Director	-17.0K	₩55,900	+19.5%	₩950M ($660K)
2025-07-02	SELL	Market Sell	손인호 Son In-ho	Internal director	-52.0K	₩55,900	+19.5%	₩2.9B ($2.0M)
2025-07-02	SELL	Market Sell	김성운 Seongwoon Kim	representative	-55.6K	₩55,900	+19.5%	₩3.1B ($2.2M)
2025-07-02	SELL	Market Sell	최진호 Jinho Choi	Internal director	-62.0K	₩55,900	+19.5%	₩3.5B ($2.4M)
2025-06-25	SELL	Market Sell	최진호 Jinho Choi	Internal director	-20.0K	₩56,200	+19.9%	₩1.1B ($781K)
2025-06-25	SELL	Market Sell	김성운 Seongwoon Kim	representative	-62.0K	₩56,200	+19.9%	₩3.5B ($2.4M)
2025-06-16	SELL	Market Sell	조수현 Jo Soo-hyun	Managing Director	-3.0K	₩54,600	+17.6%	₩164M ($114K)
2025-06-16	SELL	시간외매매	조수현 Jo Soo-hyun	Managing Director	-2.0K	₩54,600	+17.6%	₩109M ($76K)
2025-06-13	SELL	Market Sell	주혜운 Joo Hye-un	Managing Director	-5.0K	₩54,100	+16.8%	₩271M ($188K)
2025-06-13	SELL	Market Sell	손인호 Son In-ho	Internal director	-26.0K	₩54,100	+16.8%	₩1.4B ($977K)
2025-06-12	SELL	Market Sell	조수현 Jo Soo-hyun	Managing Director	-2.0K	₩55,400	+18.8%	₩111M ($77K)
2025-06-09	SELL	Market Sell	조수현 Jo Soo-hyun	Managing Director	-1.0K	₩51,700	+13.0%	₩52M ($36K)
2025-06-02	SELL	Market Sell	조수현 Jo Soo-hyun	Managing Director	-795	₩51,900	+13.3%	₩41M ($29K)
2025-04-04	SELL	Market Sell	조수현 Jo Soo-hyun	Managing Director	-205	₩28,300	-59.0%	₩6M ($4K)
2025-04-04	BUY	시간외매매	조수현 Jo Soo-hyun	Managing Director	2.0K	₩28,300	+59.0%	₩57M ($39K)
2025-04-01	SELL	시간외매매	조수현 Jo Soo-hyun	Managing Director	-10.0K	₩27,000	-66.7%	₩270M ($188K)
2025-03-31	BUY	시간외매매	조수현 Jo Soo-hyun	Managing Director	45	₩24,450	+84.0%	₩1M ($764)
2025-03-20	SELL	증여	강준규 Kang Jun-gyu	CTO	-600	₩28,650	-57.1%	₩17M ($12K)
2025-03-19	SELL	증여	강준규 Kang Jun-gyu	CTO	-20.0K	₩26,650	-68.9%	₩533M ($370K)
2025-03-06	BUY	수증	김성운 Seongwoon Kim	representative	480.0K	₩25,600	+75.8%	₩12.3B ($8.5M)
2025-03-04	BUY	PROGRAM	조수현 Jo Soo-hyun	Managing Director	100	₩25,750	+74.8%	₩3M ($2K)
2025-03-01	BUY	PROGRAM	강준규 Kang Jun-gyu	CTO	36.1K	₩25,750	+74.8%	₩929M ($645K)
2025-02-28	BUY	PROGRAM	조수현 Jo Soo-hyun	Managing Director	593	₩26,650	+68.9%	₩16M ($11K)
2025-02-26	BUY	PROGRAM	백현희 Baek Hyun-hee	Managing Director	150	₩26,700	+68.5%	₩4M ($3K)
2025-02-18	BUY	PROGRAM	주혜운 Joo Hye-un	Managing Director	300	₩31,650	+42.2%	₩9M ($7K)
2025-02-13	BUY	PROGRAM	주혜운 Joo Hye-un	Managing Director	300	₩30,450	+47.8%	₩9M ($6K)
2025-01-31	SELL	Market Sell	김성운 Seongwoon Kim	representative	-40.0K	₩30,850	-45.9%	₩1.2B ($857K)
2025-01-24	SELL	Market Sell	길남영 Namyoung Gil	Managing Director	-2.0K	₩31,750	-41.7%	₩64M ($44K)
2025-01-24	SELL	Market Sell	김성운 Seongwoon Kim	representative	-55.0K	₩31,750	-41.7%	₩1.7B ($1.2M)
2025-01-23	SELL	Market Sell	길남영 Namyoung Gil	Managing Director	-500	₩31,650	-42.2%	₩16M ($11K)
2025-01-23	SELL	Market Sell	김성운 Seongwoon Kim	representative	-57.0K	₩31,650	-42.2%	₩1.8B ($1.3M)
2025-01-21	SELL	Market Sell	길남영 Namyoung Gil	Managing Director	-1.0K	₩33,600	-33.9%	₩34M ($23K)
2025-01-10	BUY	주식매수청구권 행사	최진호 Jinho Choi	Internal director	298.7K	₩31,850	+41.3%	₩9.5B ($6.6M)
2025-01-01	BUY	PROGRAM	백현희 Baek Hyun-hee	Managing Director	3.7K	₩33,700	+33.5%	₩124M ($86K)
2025-01-01	BUY	PROGRAM	석주미 Seok Joo-mi	Managing Director	109.8K	₩33,700	+33.5%	₩3.7B ($2.6M)
2025-01-01	BUY	PROGRAM	현윤환 Hyun Yun-hwan	Managing Director	38.0K	₩33,700	+33.5%	₩1.3B ($889K)
2025-01-01	BUY	PROGRAM	길남영 Namyoung Gil	Managing Director	91.3K	₩33,700	+33.5%	₩3.1B ($2.1M)

Showing the 50 most recent of 77 filings.

Frequently asked questions

Who has been buying Silicone Two stock?: 9 distinct insiders have filed 5 disclosed insider purchases in Silicone Two (257720), most recently on 2026-04-21. 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 Silicone Two have?: Silicone Two has 5 buy-side and 46 sell-side disclosures on record, covering ₩81.8B ($56.8M) in total reported value, spanning 2024-02-21 to 2026-04-21.
Where does StockDrifts get Silicone Two 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 Silicone Two. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.