InsidersTradesSigma
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Browse the full record of transactions filed by Kumagai Masatoshi Office, Ltd.. Insider active across 1 company, notably GMOインターネットグループ株式会社. Aggregated, 7 filings have been logged. History available since 31 January 2024. The latest transaction was disclosed on 26 June 2026 (Holding update). Regulator: EDINET (Japan FSA). All data is accessible without signup.
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
7 of 7 declarations
Kumagai Masatoshi Office, Ltd. is a large shareholder of GMOインターネットグループ株式会社 on the XTKS market. The record shows 7 filings in total, and the 7 sampled recent filings cover the period from 2024-02-05 to 2026-07-01, with the transaction nature shown as Holding update; the cumulative buy and sell amounts in this recent sample are both 0.