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SecuLetter Co., Ltd. — Investor Relations & Filings

Ticker · 418250 ISIN · KR7418250007 KO Telecommunications, computer programming, consultancy, computing infrastructure, and other information service activities
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Filings indexed 120 across all filing types
Latest filing 2026-01-07 Share Issue/Capital Cha…
Country KR South Korea
Listing KO 418250

About SecuLetter Co., Ltd.

https://www.seculetter.com/en/

SecuLetter Co., Ltd. is a cybersecurity firm specializing in advanced threat detection and malware analysis. The company provides solutions to proactively defend against unknown cyberattacks, including zero-day exploits and ransomware, that leverage non-executable files. Its core technology utilizes a hybrid approach combining AI-driven static and dynamic analysis with automated reverse-engineering. A key differentiator is its Content Disarm and Reconstruction (CDR) technology, which operates on a zero-trust principle to neutralize embedded threats by disarming and rebuilding files into secure versions. SecuLetter's product suite offers protection for various environments, including email security (SLE), file security for internal networks (SLF), and cloud security (DISARM) designed to enhance platforms such as Microsoft 365.

Recent filings

Filing Released Lang Actions
[기재정정]주요사항보고서(유상증자결정)
Share Issue/Capital Change Classification · 100% confidence The document is a 'Major Matter Report' (주요사항보고서) regarding a 'Decision on Paid-in Capital Increase' (유상증자결정). It details the specifics of a third-party capital increase, including the number of shares, pricing, purpose of funds, and the list of allottees. This is a formal regulatory filing concerning changes to the company's capital structure and share issuance, which falls under the 'Share Issue/Capital Change' category.
2026-01-07 Korean
주식등의대량보유상황보고서(약식)
Major Shareholding Notification Classification · 100% confidence The document is a 'Report of Large Shareholding' (주식등의 대량보유상황보고서), which is a standard regulatory filing in South Korea under the Capital Markets Act. It details the acquisition of shares by Dong-Yu Technology Investment Co., Ltd. in Seouletter Co., Ltd., crossing the 5% threshold. This type of filing is specifically categorized as a 'Major Shareholding Notification' (MRQ) in the provided schema.
2025-12-29 Korean
임원ㆍ주요주주특정증권등소유상황보고서
Director's Dealing Classification · 100% confidence The document is a 'Report on Ownership of Specific Securities by Executives and Major Shareholders' (임원ㆍ주요주주 특정증권등 소유상황보고서) filed with the Korean Financial Supervisory Service (FSS) and Korea Exchange. This is a standard regulatory filing used to disclose insider shareholdings and changes in ownership by company directors (in this case, the CEO, Dongjin Jung). This falls under the 'Director's Dealing' category as it reports personal share transactions/holdings by a company executive.
2025-12-26 Korean
증권발행결과(자율공시) (제3자배정 유상증자)
Share Issue/Capital Change Classification · 100% confidence The document is a formal announcement regarding the results of a third-party capital increase (private placement) by SecuLetter. It details the number of shares issued, the total amount raised, and the payment date. This falls under the category of share issuance and capital changes.
2025-12-22 Korean
[기재정정]사외이사의선임ㆍ해임또는중도퇴임에관한신고
Board/Management Information Classification · 100% confidence The document is a regulatory filing submitted to the Financial Services Commission/Korea Exchange regarding the resignation of an outside director. It specifically details the change in board composition (resignation of an outside director) and provides a correction to the previously filed report. This falls under the category of board/management changes.
2025-12-18 Korean
[기재정정]주주총회소집결의 (임시주주총회)
Proxy Solicitation & Information Statement Classification · 95% confidence The document is a formal notice regarding the convocation of an Extraordinary General Meeting (EGM) and a correction to the meeting location. It details the agenda (appointment of an outside director), the date, and the venue. This falls under the category of Proxy Solicitation & Information Statement (PSI) as it provides shareholders with the necessary information to participate in a meeting and vote on specific agenda items.
2025-12-17 Korean

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