Skip to main content
KOSTECSYS. CO., LTD. logo

KOSTECSYS. CO., LTD. — Investor Relations & Filings

Ticker · 355150 ISIN · KR7355150004 KO Manufacturing
Open in API
Filings indexed 196 across all filing types
Latest filing 2025-09-24 Regulatory Filings
Country KR South Korea
Listing KO 355150

About KOSTECSYS. CO., LTD.

https://www.kostec.net/en/

KOSTECSYS is a manufacturer of advanced thermal management and packaging solutions for the semiconductor industry. The company specializes in components for next-generation power semiconductors, including SiC and GaN devices, leveraging its proprietary KCMC® low-thermal expansion, high-heat dissipation materials. Its core products include thermal matching packages, heat spreaders, base plates, spacers, and liquid cold plates. KOSTECSYS also provides specialized packages for high-power laser diodes, photonic integrated circuits, and high-frequency MMICs, as well as components such as current sensor shunt resistors.

Recent filings

Filing Released Lang Actions
단일판매ㆍ공급계약체결
Regulatory Filings
2025-09-24 Korean
[기재정정]사업보고서 (2024.12)
Annual Report Classification · 1% confidence The document is a 'Business Report' (사업보고서) for the company 'Kostecsys' (주식회사코스텍시스). It contains detailed sections including company overview, history, capital changes, and business operations. It is a formal regulatory filing submitted to the Financial Supervisory Service (FSS) and Korea Exchange (KRX). Based on the content and structure, it is a comprehensive annual financial and operational report, which corresponds to the 10-K filing type in the provided schema. FY 2024
2025-08-14 Korean
반기보고서 (2025.06)
Interim / Quarterly Report Classification · 1% confidence The document is a '반기보고서' (Semi-annual Report) for the company '코스텍시스' covering the period from 2025-01-01 to 2025-06-30. It contains detailed financial and business information, including management reports, shareholding status, and business descriptions, which fits the definition of an Interim/Quarterly Report (IR). H1 2025
2025-08-14 Korean
자기주식처분결과보고서
Transaction in Own Shares Classification · 1% confidence The document is a '자기주식처분결과보고서' (Report on the Results of Disposal of Treasury Shares) filed with the Financial Supervisory Service (FSS) in South Korea. It details the disposal of treasury shares by Kostecsys in connection with the issuance of exchangeable bonds. This document specifically reports the outcome of a treasury share disposal transaction, which falls under the category of 'Transaction in Own Shares' (POS).
2025-08-08 Korean
증권발행결과(자율공시) (제2회차 EB)
Capital/Financing Update Classification · 1% confidence The document is a formal announcement regarding the completion of a private placement of exchangeable bonds (EB). It details the issuance amount, payment date, and confirms the completion of the transaction. This falls under the category of company fundraising and financing activities, specifically matching the 'Capital/Financing Update' (CAP) classification.
2025-08-08 Korean
주요사항보고서(교환사채권발행결정)
Capital/Financing Update Classification · 1% confidence The document is a 'Major Matter Report' (주요사항보고서) from a Korean company (Kostecsys) regarding the issuance of exchangeable bonds (교환사채권 발행결정). This type of filing is a regulatory requirement in Korea for significant corporate financing activities, specifically capital structure changes involving debt instruments that can be exchanged for equity. It details the terms of the bond, use of proceeds, and investor information. This falls under the 'Capital/Financing Update' category.
2025-07-22 Korean

Report missing filing

Can't find a specific document? Let us know and we'll add it within 24 hours.

We will notify you once the filing is added.
Report sent
Thank you. We will check the data and update it shortly.