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Notable filings, shown the next business day. Pro subscribers see every relevant filing the same day, plus watchlist alerts. Each item links to the original EDINET filing.

Not investment advice. Figures are taken from the original filing; the original Japanese filing prevails. Source: EDINET (FSA). “Activist” labels are a factual classification of the filer against our reference list of investors who have previously filed shareholder proposals or engaged publicly — not a recommendation.

Large-shareholding reportActivist: 3D Investment PartnersTSE: 90242026-06-12 16:15

3D Investment Partners raises Seibu Holdings stake to 9.02% from 7.97%

3D Investment Partners Pte. Ltd. filed Amendment Report No.4 to its large shareholding report on SEIBU HOLDINGS INC., disclosing an increase in its holding ratio to 9.02% (27,590,801 shares) from 7.97%, triggered by an increase of 1% or more. The obligation date was 2026-06-05. Total acquisition cost reported was JPY 60,735,065,000. The filer states purposes including pure investment and engagement, and indicates it may make important proposals regarding board composition, capital policy, business portfolio, governance and related matters, and may increase its holding by more than 5% within three months depending on market conditions.

Holding: 9.02% (from 7.97%) — SEIBU HOLDINGS INC.

Original filing on EDINET ↗

Source: EDINET — Summarized and translated by KaijiWatch, not an official translation.

Large-shareholding reportActivist: Murakami Group (S Grant Corporation)TSE: 15182026-06-12 16:01

Murakami Group lifts MITSUI MATSUSHIMA HOLDINGS stake to 4.94% from 0.99%, flags activist proposals on capital policy and asset sales

S Grant Corporation (Murakami Group) filed an amended large shareholding report on MITSUI MATSUSHIMA HOLDINGS CO.,LTD., disclosing a holding of 3,226,200 shares, equal to 4.94% of shares outstanding, up from 0.99% in the prior report. The reporting obligation date was 2026-06-05. The filer states it holds shares for the purpose of advising and proposing on capital policy and corporate governance to enhance shareholder value, and has made or may make material proposals including: (1) changes to capital policy (increased dividends and share buybacks), and (2) transfer of assets and businesses (including subsidiaries) that do not contribute to shareholder value. Total acquisition funds were 4,067,224,000 yen, including 3,458,021,000 yen in borrowings.

Holding: 4.94% (from 0.99%) — MITSUI MATSUSHIMA HOLDINGS CO.,LTD.

Original filing on EDINET ↗

Source: EDINET — Summarized and translated by KaijiWatch, not an official translation.