How to track foreign investors and activists in Korean stocks
When a global asset manager builds a position in a KOSPI name, or an activist starts a campaign at a Korean company, the first public signal is almost always a 5%-rule disclosure filed in DART — in Korean. This guide explains what that filing is, who the players are, and how to monitor them in English from an AI assistant.
The 5%-rule disclosure, and why it matters
Under Korean capital-markets law, anyone crossing 5% ownership of a listed company must file a large-holding report (주식등의대량보유상황보고서, commonly 대량보유보고) in DART, and must update it whenever the stake moves by 1% or more. The report states who is buying, how much, and — critically — the purpose of holding (simple investment vs. influence over management). That purpose field is what separates a passive index inflow from an activist campaign.
It is the single most-watched DART filing type for anyone following capital flow, because it is a leading indicator: it shows accumulation as it happens, before it shows up in news or quarterly holdings data.
Who files them
Two groups matter most to foreign readers, and they call for different reading:
- Global passive / institutional holders — BlackRock, Vanguard, State Street, Norges Bank (Norway's sovereign fund), GIC and Temasek (Singapore), and more. Their filings usually signal index or mandate-driven flow rather than a campaign, but the direction and size are still signal.
- Activists — Korean activist funds (KCGI, Align Partners, Truston, Anda, Cha Partners, VIP) and global activists filing in Korea (ValueAct, Elliott). Their filings — especially with a management-influence purpose — often precede board pushes, dividend campaigns, or governance fights.
Why this is hard to do from outside Korea
The data is public and free on DART. The friction is twofold. First, everything — filer names, the purpose field, the security description — is in Korean. Second, and less obvious: DART does not classify filers. It will not tell you “this filer is a global passive holder” or “this one is an activist.” You have to recognise the Korean rendering of the filer name and know its category yourself. Even the FSS-mandated English DART filings for large caps give you one company's own filing — not a classified view across the whole 5%-rule stream.
That cross-filer classification — matching every 5%-rule filer against a known-entity list and tagging it foreign-passive vs. activist — is the work that otherwise takes a Korean-reading analyst doing it by hand.
Monitoring it from an AI assistant
koreanpulse is an MCP server that does exactly this classification and returns it in English. Connected to ChatGPT or Claude, it exposes two tools for this use case:
monitor_foreign_holders— recent 5%-rule disclosures auto-tagged for global passive / institutional holders (BlackRock, Vanguard, State Street, Norges, GIC, Temasek + more).monitor_activist_investors— recent 5%-rule disclosures auto-tagged for known activists (KCGI, Align, Truston, Anda, Cha, VIP, ValueAct, Elliott).
You do not call tools by name — you ask a normal question and the assistant picks the tool. Prompts that work:
- “Any activist 5%-rule filings on Korean companies in the last two weeks?”
- “Did any global asset manager cross 5% on a KOSPI name recently? Translate the filings.”
- “Show me Elliott or ValueAct activity in Korea this month.”
Connecting it
Add the hosted endpoint as a custom connector in ChatGPT (Settings → Connectors) or Claude:
The five free tools (including live filing retrieval and translation) need no key. The two classification tools above are part of the Cloud tier (Solo $29/mo and up); the server is also AGPL open source if you prefer to self-host with your own keys.
See it for free first
The public daily snapshot at koreanpulse.dev/today already shows the classified foreign-holder flows and activist filings for the latest Korean market close — no login, no key — so you can see the shape of the output before connecting anything.
Not investment advice. koreanpulse translates and classifies primary-source public data (DART filings, Korean industry news). It is a data and intelligence service — it performs no individualized analysis and makes no recommendation to buy, sell, or hold any security. Identifying that an investor filed a disclosure is not a view on the security. 자본시장법 §101 면제 영역 — 일반 정보 데이터 제공.