English Disclosure Requirements for Korean Listed Companies: Why Professional Rewriting Matters

Korea's mandatory English disclosure requirement is one of the most significant regulatory changes in Korean capital markets in a generation. It's expanding rapidly, and the companies it affects are discovering that meeting the technical requirement of submitting a document in English is not the same as meeting the standard that international investors, analysts, and index providers actually apply when they read it.

This article explains the current and upcoming English disclosure requirements for Korean listed companies, what the DART English platform provides and where it stops, why machine translation and internal drafts often fall short of the standard international capital market audiences expect, and how professional editing and rewriting fit into a compliance and investor relations workflow that treats English disclosure as a genuine communication obligation rather than a regulatory checkbox.

The Three-Phase Rollout: Who Is Affected and When

The mandatory English disclosure programme is structured as a three-phase rollout administered by the Financial Services Commission and the Korea Exchange. Each phase expands the number of companies affected and the scope of information required in English.

Phase 1: January 2024

From January 2024, KOSPI-listed companies with total assets exceeding 10 trillion won are required to submit key disclosures in English within three business days after the Korean disclosure. As of 2024, 111 firms met this threshold. These companies must submit English versions of 26 key management items to the Korea Exchange. The Phase 1 companies are, as the FSC has noted, the most capable of complying: large-cap chaebols and their listed subsidiaries with established investor relations functions and international capital market experience.

Phase 2: May 1, 2026

Starting from May 1, 2026, the mandatory English disclosure requirement enters a second phase. The scope of KOSPI-listed companies subject to the mandatory English disclosure requirement will be expanded to those with assets worth 2 trillion won or more, covering 265 companies as of end-2024. The disclosure items subject to the mandatory English disclosure will also be expanded to all disclosure items required by KRX rules, including material information in its entirety (55 items), fair disclosure, and inquired disclosure. Large KOSPI-listed companies with assets worth 10 trillion won or more will need to submit English disclosures on the same day as filing their Korean disclosures.

The same-day submission requirement for the largest companies is particularly significant. It means these companies can no longer treat English disclosure as a delayed translation exercise. The English document must be ready at the same time as the Korean one, which requires either building English drafting into the disclosure preparation process from the beginning or having a rapid-turnaround professional editing and rewriting service on call for same-day delivery.

Phase 3: 2028

The third and final phase will begin in 2028, at which point all KOSPI-listed companies will be required to provide disclosures in English. Under the scheme, 848 companies are expected to be included in the third phase. The FSC is also considering applying similar requirements to large-cap KOSDAQ companies. The trajectory is clear: mandatory English disclosure is moving toward universal coverage of Korea's listed company universe.

Why This Regulation Exists: The Korea Discount

Understanding the policy motivation explains why the quality of English disclosure matters beyond technical compliance. The mandatory English disclosure programme is an explicit response to the persistent undervaluation of Korean listed companies relative to international peers — what market participants call the "Korea discount."

Foreign investors owned approximately 32 percent of KOSPI market capitalisation as of mid-2025. Despite this substantial foreign ownership, access to timely, accurate, and readable corporate information in English has been a persistent barrier. Korean companies that are structurally comparable to their international peers have traded at discounts that cannot be fully explained by fundamentals, and opaque or inaccessible English disclosure has been identified as a contributing factor.

The English disclosure requirement is designed to change this by ensuring that the information foreign investors need to make accurate valuations is available in a language they can read at the same time Korean investors receive it. The policy works only if the English disclosure is actually readable and credible to international capital market audiences — not merely technically present. A disclosure that is submitted in English but that reads as a low-quality machine translation doesn't accomplish the policy's purpose and doesn't accomplish the company's commercial purpose of improving how international investors perceive and value its shares.

What the DART English Platform Provides — and Where It Stops

The Financial Supervisory Service has made substantial investments in upgrading the DART English platform to support the mandatory disclosure rollout. The FSS updated DART to allow users to search for a company's name, titles of reports, and an attached file's name in English. The FSS also plans to provide English translation for the table of contents and format items in the text.

The authorities plan to work on making improvements to English disclosure platforms by expanding the automated machine translation service, providing English search function for Korean statutory disclosures, and enhancing translation quality using AI-based machine translation. The KRX plans to compile and disseminate an AI-developed glossary on English disclosure and provide relevant training and information sessions.

These are meaningful infrastructure improvements. But there's an important limitation that the FSS itself acknowledges directly. The DART English website carries this disclaimer:

This disclaimer reflects a genuine limitation of the current infrastructure: automated machine translation of Korean financial disclosure language produces English that is often technically intelligible but that lacks the precision, consistency, and register of professional financial English. For a company filing a disclosure that will be read by institutional investors, portfolio managers, and ESG rating agencies making real allocation decisions, the gap between machine-translated English and professional financial English is commercially significant.

What machine translation doesn't address

Machine translation tools — even AI-powered ones — handle the mechanical conversion of Korean text to English competently for straightforward content. But Korean financial disclosure language presents specific challenges that machine translation consistently handles poorly.

Financial terminology consistency. Korean financial disclosure uses specific terms that don't map cleanly to the international financial English used in SEC filings, IFRS financial statements, and institutional investor communications. Machine translation produces English equivalents that may be technically accurate but are not the terms that international analysts and investors use. A disclosure that uses non-standard English for a financial concept creates uncertainty about whether the writer means what the reader understands, which undermines the credibility of the document.

Sentence structure from Korean corporate writing conventions. Korean corporate disclosure language uses sentence structures, information ordering, and honorific register conventions that transfer through machine translation and remain visible to native English readers. The result is English that reads as translated: sentences where extensive context precedes the key information, passive constructions used where active voice is standard in financial English, and a formality register calibrated to Korean business communication rather than to the conventions of international financial disclosure.

Precision on material information. The disclosure items subject to mandatory English filing include decisions on dividends, capital increases and decreases, M&A activity, and other matters that affect share price and investor decision-making. A mistranslated figure, an ambiguous qualifier, or an imprecise description of a material event in a mandatory disclosure creates regulatory risk and can affect market perception in ways that are difficult to correct after the document has been published.

ESG and governance language. Korean listed companies are increasingly evaluated by international ESG rating agencies including MSCI and Sustainalytics, which extract data from English disclosure text. An ESG disclosure that uses imprecise or non-standard English for a framework-specific metric produces lower data quality in agency assessments than the same information expressed in the precise, framework-aligned language that these agencies use in their data extraction models. The difference between "we comply with certain environmental standards" and "the company's Scope 1 and Scope 2 greenhouse gas emissions are independently verified against the ISO 14064 standard" is the difference between a disclosure that generates a data point in an ESG rating model and one that doesn't.

The Compliance Workflow Problem

The practical workflow challenge that Phase 2's same-day submission requirement creates for large-cap companies is significant. A disclosure drafted in Korean, reviewed internally, and approved for submission must now have an English version ready at the same moment. For companies that have been treating English disclosure as a post-submission translation task — producing the Korean disclosure first and then translating it — the same-day requirement forces a fundamental change in process.

There are three approaches companies use, each with different quality outcomes.

Internal bilingual drafting

Companies with large IR and legal teams sometimes draft English and Korean versions simultaneously using internal bilingual professionals. This is the approach most likely to produce high-quality English because the English version is drafted from scratch rather than translated from Korean. But it requires sufficient bilingual staff with both financial disclosure knowledge and high-level English writing proficiency — a combination that is scarcer than either quality alone. Internal bilingual drafters who are native Korean speakers often produce English that is accurate in content but that retains Korean corporate writing patterns in ways they can't identify through self-review.

Machine translation with internal review

The most common approach is using machine translation — often with DART's built-in tools or external MT services — and then having the output reviewed by internal English-proficient staff. This produces faster turnaround than full internal drafting but relies on the quality of the machine translation output and the reviewing staff's ability to identify what the translation has got wrong. Staff who are reviewing a machine-translated document in their second language are subject to the same self-review limitations as the writers described in the section above: the errors that most need correcting are often the ones that feel most natural because they correspond to Korean communication patterns the reviewer also uses.

Professional editing and rewriting

The most reliable approach is having the English document reviewed by a native English editor with financial disclosure experience before submission. For documents that were drafted in Korean and translated — whether by machine or by internal staff — this means rewriting rather than editing: producing new English sentences and paragraphs from the translated content that read as written in professional financial English rather than translated from Korean. For documents drafted directly in English by internal bilingual staff, this means editing that addresses the specific patterns described above and ensures the document meets the standard of professional financial English that international audiences expect.

What Professional Rewriting Produces That Translation Doesn't

The distinction between professional rewriting and translation, or between professional editing and internal review, is specific and demonstrable. Here's what it addresses in the context of a Korean mandatory disclosure document.

Information structure that matches international disclosure conventions

International financial disclosure documents — SEC filings, annual reports, earnings releases, and material event announcements — follow information structures that international investors have learned to read efficiently. The most important information appears first. The material decision or event is stated in the opening sentence. Supporting context, qualifications, and procedural details follow. A Korean disclosure document translated into English often presents information in the order it appears in the Korean original, which follows Korean corporate disclosure conventions rather than the information structure that international readers apply to scan and extract key information quickly. Professional rewriting restructures the information to match international disclosure conventions without changing the content or the legal substance of the disclosure.

Standard financial English terminology

Professional financial English uses specific terminology that international investors, analysts, and rating agencies recognise and rely on. "Rights offering" rather than "new share issuance through subscription." "Treasury share cancellation" rather than "disposal of self-owned shares." "Material adverse change" rather than "significant negative development." "Board resolution" rather than "decision of the board of directors." These are not arbitrary preferences — they're the terms that map to the concepts international investors are looking for when they read a disclosure, and using non-standard terms creates interpretive friction that degrades the communication value of the document. A professional editor or rewriter with financial disclosure experience knows these terms and applies them consistently throughout the document.

Register appropriate for international capital markets

Korean corporate disclosure language uses a formal register calibrated to Korean regulatory and business communication conventions. The register of international financial disclosure in English — SEC filings, LSE announcements, HKEX circulars — is formal but direct: it states facts, makes clear what the company has decided or what has occurred, and uses minimal hedging language around material information. A disclosure written in over-deferential or excessively formal Korean corporate English reads to international investors as though the company is uncomfortable with what it's disclosing, even when the content is entirely routine. Professional rewriting calibrates the register to match international disclosure conventions.

Consistency across a disclosure and across multiple disclosures

Companies subject to mandatory English disclosure are filing multiple documents over the course of a year. Terminology, company name formatting, subsidiary name conventions, and description of ongoing matters need to be consistent across all filings. A company that describes a major business unit one way in a Q1 disclosure and differently in a Q3 disclosure creates confusion for analysts building models from the disclosure data. Professional editing of each disclosure against the company's established disclosure terminology ensures consistency across the filing series.

The Timing Constraint and How Professional Services Address It

The same-day submission requirement for the largest KOSPI companies and the three-business-day requirement for the Phase 2 expansion create tight turnaround windows that internal processes often struggle to meet reliably. A disclosure triggered by a material corporate event — a board decision on a major acquisition, a significant earnings revision, a regulatory matter — may need to be drafted, translated, reviewed, and filed within a very short window after the triggering event.

Editor World's same-day editing service offers 2-hour, 4-hour, and 8-hour turnaround options, available 24 hours a day, 7 days a week. For disclosure documents that need editing or rewriting on the same day as the Korean filing, same-day availability is not a convenience — it's a compliance requirement. Browse editor profiles at editorworld.com/editors by financial services and corporate communications expertise to identify an editor whose background matches your disclosure document type before your next filing deadline. Establishing the relationship before you need it urgently is significantly better than searching for a service under time pressure on the day of a material disclosure.

The Certificate of Editing for Regulatory Compliance

For Korean companies that want to document the standard of care applied to their English disclosures, Editor World provides a certificate of editing on request at no additional charge. The certificate confirms the name and qualifications of the native English editor who reviewed the document, the date of completion, the nature of the editing or rewriting performed, and that no AI tools were used at any stage of the process.

As international investors and governance analysts have become more attentive to the quality of English disclosure processes — and as regulators in multiple markets have signalled interest in the use of AI tools in corporate document preparation — a documented record of professional human review by a qualified native English speaker provides a governance signal that the company has treated its English disclosure obligation as a substantive communication standard rather than a compliance exercise. This record can be retained as part of the disclosure preparation file for internal governance purposes.

Getting Started Before Your Next Filing Deadline

For Korean companies currently in Phase 1 of the mandatory English disclosure requirement, the transition to Phase 2's expanded scope and same-day requirement for the largest companies is an opportunity to establish a professional English editing and rewriting workflow before the new obligations take effect. Companies that have been managing English disclosure with internal resources supplemented by machine translation should assess whether that workflow produces documents that meet the standard international investors actually apply, rather than just the standard of technical compliance.

For companies approaching Phase 2 compliance from May 2026, the time to build the workflow is now. The most effective preparation is to have an existing disclosure document professionally reviewed by a native English financial editor before the mandatory requirement takes effect, assess the gap between the internally produced English and the edited version, and use that assessment to decide whether editing or full rewriting is the right service for your documents going forward.

Editor World's English editing and rewriting services for Korean businesses covers the full range of corporate documents produced by Korean companies for international audiences. Our rewriting service is appropriate for disclosure documents that were drafted in Korean and translated — whether by machine or internal staff — and that need full English reconstruction rather than language-level correction. Our business document editing service is appropriate for documents drafted directly in professional English that need native-speaker review before filing. Use the instant price calculator for an exact quote before committing, or contact an editor directly to discuss your specific disclosure document and turnaround requirements.

For guidance on the specific English writing patterns that affect Korean corporate documents, read our article on common English writing errors Korean business writers make. For Korean academic researchers producing English manuscripts for international journals, visit our English editing services in South Korea page.

Content reviewed by Editor World editorial staff. Editor World provides professional English editing and rewriting services for Korean listed companies producing mandatory English disclosures and other corporate documents for international audiences. Regulatory information in this article reflects publicly available FSC and KRX announcements and is provided for informational purposes only. Companies should consult their legal and compliance advisers for guidance on their specific obligations under the mandatory English disclosure requirements.