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Optrontech 082210

Company
옵트론텍Optrontech
Insiders
4
Buys
16
Total Value
₩156M ($108K)
Avg Return
+34.03%
Last Filing
2026-07-16

Optrontech (082210) has 16 disclosed insider purchases and 0 disclosed disposals on record, filed by 4 distinct insiders. Together those filings cover ₩156M ($108K) in reported transaction value. The earliest filing StockDrifts holds for Optrontech is dated 2024-09-13; the most recent is 2026-07-16. 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 +34.03%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent insider trades

DateTypeSourceInsiderPositionSharesPrice at filingReturnValue
2026-07-20BUY신규선임
홍창일
Hong Chang-il
Planning Director348.8K₩1,885+13.3%₩658M ($457K)
2026-07-16BUYMarket Buy
정대현
Daehyun Jeong
president24.7K₩1,921+0.0%₩47M ($32K)
2026-07-15BUYMarket Buy
정대현
Daehyun Jeong
president68₩1,976-2.8%₩106K ($74)
2026-07-14BUYMarket Buy
정대현
Daehyun Jeong
president217₩1,950-1.5%₩342K ($237)
2026-07-13BUYMarket Buy
정대현
Daehyun Jeong
president25.0K₩1,944-1.2%₩44M ($31K)
2026-06-29BUYMarket Buy
CHOI SANG HO
CEO2.0K---
2026-06-26BUYMarket Buy
CHOISANGHO,CORP.
-67.0K---
2026-06-26BUYMarket Buy
CHOI SANG HO
CEO21.6K---
2026-06-25BUYMarket Buy
CHOI SANG HO
CEO48.9K---
2026-06-24BUYMarket Buy
CHOI SANG HO
CEO5.6K---
2026-06-11BUYMarket Buy
CHOISANGHO,CORP.
-67.0K---
2026-06-09BUYMarket Buy
CHOISANGHO,CORP.
-62.0K---
2026-06-08BUYMarket Buy
CHOISANGHO,CORP.
-55.0K---
2026-05-29BUYCB인수
CHOISANGHO,CORP.
-5.2M---
2025-04-28BUYMarket Buy
정대현
Daehyun Jeong
president15.0K₩1,720+40.7%₩26M ($18K)
2025-04-07BUYMarket Buy
정대현
Daehyun Jeong
president5.0K₩1,161+108.4%₩6M ($4K)
2025-03-31BUYMarket Buy
정대현
Daehyun Jeong
president20.0K₩1,110+118.0%₩22M ($15K)
2024-09-13BUYMarket Buy
김동준
Dongjun Kim
moving4.8K₩2,190+10.5%₩11M ($7K)

Frequently asked questions

Who has been buying Optrontech stock?
4 distinct insiders have filed 16 disclosed insider purchases in Optrontech (082210), most recently on 2026-07-16. 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 Optrontech have?
Optrontech has 16 buy-side and 0 sell-side disclosures on record, covering ₩156M ($108K) in total reported value, spanning 2024-09-13 to 2026-07-16.
Where does StockDrifts get Optrontech 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 Optrontech. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.