Big Investor Watchis a blog that tracks who is moving which stock, when, and how much — based on public information such as EDINET large-shareholding reports (Japan’s “5% rule” filings) — covering institutional investors, activist funds, insiders, and share buybacks (collectively “whales”: large investors with enough capital to move the market).

Language / 言語

About This Site

This site is commentary based on public EDINET large-shareholding filings and is not investment advice.

© 2026 Big Investor Watch