Who has been buying Peptron stock?

3 distinct insiders have filed 1 disclosed insider purchases in Peptron (087010), 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 Peptron have?

Peptron has 1 buy-side and 3 sell-side disclosures on record, covering ₩11.6B ($8.1M) in total reported value, spanning 2024-10-21 to 2026-07-13.

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.

Peptron 087010

Company

펩트론Peptron

Insiders

Buys

Total Value

₩11.6B ($8.1M)

Avg Return

-163.00%

Last Filing

2026-07-13

Peptron (087010) has 1 disclosed insider purchases and 3 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩11.6B ($8.1M) in reported transaction value. The earliest filing StockDrifts holds for Peptron is dated 2024-10-21; the most recent is 2026-07-13.

Price & insider activity (12 months)

Recent insider trades

Date	Type	Source	Insider	Position	Shares	Price at filing	Return	Value
2026-07-13	BUY	Market Buy	최호일 Hoil Choi	CEO	10.0K	₩108,200	+10.2%	₩1.1B ($736K)
2024-11-21	BUY	유상신주취득	최호일 Hoil Choi	CEO	111.5K	₩105,200	+158.6%	₩11.7B ($8.1M)
2024-11-21	SELL	기타	장승구 Jang Seung-gu	Managing Director	-8.5K	₩105,200	-158.6%	₩899M ($624K)
2024-11-21	SELL	기타	최호일 Hoil Choi	CEO	-107.5K	₩105,200	-158.6%	₩11.3B ($7.9M)
2024-11-21	BUY	유상신주취득	장승구 Jang Seung-gu	Managing Director	8.7K	₩105,200	+158.6%	₩916M ($636K)
2024-11-06	SELL	Market Sell	이병인 Lee Byung-in	Managing Director	-62	₩83,300	-226.5%	₩5M ($4K)
2024-11-06	SELL	Market Sell	장승구 Jang Seung-gu	Managing Director	-12.9K	₩83,300	-226.5%	₩1.1B ($744K)
2024-10-31	SELL	Market Sell	최호일 Hoil Choi	CEO	-107.5K	₩88,000	-209.1%	₩9.5B ($6.6M)
2024-10-22	BUY	기타	장승구 Jang Seung-gu	Managing Director	21.4K	₩92,900	+192.8%	₩2.0B ($1.4M)
2024-10-22	BUY	기타	최호일 Hoil Choi	CEO	215.0K	₩92,900	+192.8%	₩20.0B ($13.9M)
2024-10-22	BUY	기타	이병인 Lee Byung-in	Managing Director	62	₩92,900	+192.8%	₩6M ($4K)
2024-10-21	SELL	시간외매매	최호일 Hoil Choi	CEO	-173.0K	₩95,500	-184.8%	₩16.5B ($11.5M)

Frequently asked questions

Who has been buying Peptron stock?: 3 distinct insiders have filed 1 disclosed insider purchases in Peptron (087010), 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 Peptron have?: Peptron has 1 buy-side and 3 sell-side disclosures on record, covering ₩11.6B ($8.1M) in total reported value, spanning 2024-10-21 to 2026-07-13.
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.