secwatch.observer — SEC 8-K summary ====================================== Issuer: BERKLEY W R CORP (WRB) CIK: 0000011544 Form: 8-K Filed at: 2025-12-05T23:59:59+00:00 Accession: 0001193125-25-308800 Event type: other_material Sentiment: positive Materiality: 0.60 Item codes: 8.01, 9.01 LLM model: deepseek-v4-flash:cloud@v2 Mitsui Sumitomo Insurance acquires beneficial ownership of at least 12.5% of WRB -------------------------------------------------------------------------------- - MSI now holds ≥12.5% of WRB outstanding common stock under previously announced Berkley family agreements. - MSI shares will be voted per Berkley family recommendations except for proportional voting in limited cases. - No shares were purchased from the Berkley family or the Company itself. - MSI expects to complete its full investment under the agreements in Q1 2026. - The agreements were originally filed with the SEC on March 28, 2025. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/11544/000119312525308800/0001193125-25-308800-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/11544/000119312525308800/d53561d8k.htm HTML page: https://secwatch.observer/filing/0001193125-25-308800 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer