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PSK INC. — Investor Relations & Filings

Ticker · 319660 ISIN · KR7319660007 KO Manufacturing
Open in API
Filings indexed 207 across all filing types
Latest filing 2026-05-22 Major Shareholding Noti…
Country KR South Korea
Listing KO 319660

About PSK INC.

https://www.pskinc.com/

PSK INC. is a global manufacturer of semiconductor processing equipment specializing in wafer surface treatment technologies. The company is a market leader in plasma dry strip applications, providing solutions for photoresist and residue removal. Its product portfolio includes the SUPRA series for dry stripping, the INTEGER series for dry cleaning of high-aspect ratio structures, the OMNIS series for new hard mask (NHM) stripping, and the PRECIA series for wafer edge cleaning. PSK's equipment is utilized in the mass production of memory and logic devices, and the company focuses on developing core manufacturing technologies for next-generation semiconductors.

Recent filings

Filing Released Lang Actions
주식등의대량보유상황보고서(일반)
Major Shareholding Notification Classification · 90% confidence The document is a “주식등의 대량보유상황보고서(일반)” (Large Shareholding Report) filed under the Capital Markets Act, detailing changes in the number and percentage of shares held by a major shareholder and its related parties. This matches a Major Shareholding Notification (threshold crossing and changes in significant ownership).
2026-05-22 Korean
주식등의대량보유상황보고서(일반)
Major Shareholding Notification Classification · 95% confidence The document is a detailed “주식등의 대량보유상황보고서(일반)” (Large Shareholding Status Report) filed under Korea’s Capital Market Act, listing shareholdings, percentages, and reasons for changes by PSK Holdings and related parties. This matches the definition of a Major Shareholding Notification (MRQ).
2026-05-19 Korean
임원ㆍ주요주주특정증권등소유상황보고서
Director's Dealing Classification · 90% confidence The document is a mandatory insider shareholding status report (‘임원ㆍ주요주주 특정증권등 소유상황보고서’) detailing ownership changes in the company’s securities by an officer, including acquisition/disposal dates, amounts, and share percentages. This matches the definition for Director’s Dealing (insider trades) rather than a broader financial report or announcement. Hence it is classified as DIRS.
2026-05-19 Korean
분기보고서 (2026.03)
Interim / Quarterly Report Classification · 95% confidence The document is titled “분기보고서” (Quarterly Report) for the period 2026-01-01 to 2026-03-31 and contains detailed interim financial statements, segment sales data, production figures, balance sheet and risk management notes. It is a comprehensive quarterly financial report rather than just an announcement or summary. Therefore, it fits the “Interim / Quarterly Report” category. Q1 2026
2026-05-15 Korean
주식등의대량보유상황보고서(일반)
Major Shareholding Notification Classification · 95% confidence The document is a Korean "주식등의 대량보유상황보고서," i.e. a large shareholding status report filed under the Capital Markets Act, detailing changes in major share ownership (threshold crossings) by PSK Holdings Inc. This matches our definition for Major Shareholding Notification (Code: MRQ).
2026-05-14 Korean
임원ㆍ주요주주특정증권등소유상황보고서
Director's Dealing Classification · 99% confidence The document is a Korean insider share ownership report (“임원ㆍ주요주주 특정증권등 소유상황보고서”) filed by an officer (임원) disclosing his holdings and transactions in the company’s securities. This matches the definition of Director’s Dealing (insider transactions by company directors/executives).
2026-05-13 Korean

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