Welcome to our dedicated page for W.R Berkley SEC filings (Ticker: WRB), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
W. R. Berkley Corporation filings document the regulatory record of an insurance holding company with common stock and subordinated debentures registered on the New York Stock Exchange. Current reports attach earnings releases for quarterly operating results, while proxy materials address board and shareholder voting matters.
The filing record also covers capital-structure disclosures for WRB common stock and exchange-listed debenture series, as well as material-event reports on beneficial ownership changes. These documents frame the company’s Insurance and Reinsurance & Monoline Excess operations through formal reporting, governance, capital-structure and event-disclosure categories.
Mitsui Sumitomo Insurance Co., Ltd. (MSI), a 10% owner of W. R. Berkley Corporation, reported sizable open‑market share purchases under a pre-set trading plan. On January 22, 2026, MSI bought 330,000 shares of W. R. Berkley common stock at a weighted average price of $67.4505. On January 23, 2026, MSI made two additional purchases of 201,081 shares at a weighted average price of $66.7699 and 166,919 shares at a weighted average price of $67.1803. These transactions were effected pursuant to a Rule 10b5-1 purchase plan adopted on October 3, 2025. Following the reported trades, MSI directly held 54,589,504 W. R. Berkley common shares. Because MSI is a wholly owned subsidiary of MS&AD Insurance Group Holdings, Inc., MS&AD may be deemed to beneficially own these securities, but expressly disclaims beneficial ownership except to the extent of its pecuniary interest.
Mitsui Sumitomo Insurance Co., Ltd., a 10% owner of W. R. Berkley Corporation, reported open-market purchases of the company’s common stock over two days in January 2026 under a pre-arranged Rule 10b5‑1 trading plan adopted on October 3, 2025. On January 20, 2026, it bought 265,006 shares at a weighted average price of $67.7506 and 44,994 shares at $68.0772. On January 21, 2026, it purchased 59,002 shares at $66.9526 and 260,998 shares at $67.6032, for an aggregate 630,000 shares across both days. Following these transactions, the reporting persons show beneficial ownership of 53,891,504 shares. The filing notes that the shares are held directly by Mitsui Sumitomo Insurance Co., Ltd., and that MS&AD Insurance Group Holdings, Inc. may be deemed to beneficially own them but expressly disclaims beneficial ownership except to the extent of its pecuniary interest.
Mitsui Sumitomo Insurance Co., Ltd., a 10% owner of W.R. Berkley Corporation, reported a series of open-market purchases of the company’s common stock. On January 15, 2026, it bought blocks of 166,907 shares at $68.675 and 68,093 shares at $69.4472. On January 16, 2026, it purchased 241,309 shares at $68.031 and 58,691 shares at $68.7857.
The filing states these purchases were made under a Rule 10b5-1 purchase plan adopted on October 3, 2025, indicating they were pre-arranged. After these transactions, Mitsui Sumitomo Insurance directly held 53,261,504 shares of W.R. Berkley common stock. Because Mitsui Sumitomo Insurance is a wholly owned subsidiary of MS&AD Insurance Group Holdings, Inc., MS&AD may be deemed to beneficially own these securities, though it expressly disclaims beneficial ownership except to the extent of its pecuniary interest.
Mitsui Sumitomo Insurance Co., Ltd. and MS&AD Insurance Group Holdings, Inc. have updated their ownership disclosure for W. R. Berkley Corporation. Mitsui Sumitomo purchased 4,124,916 shares of common stock in the open market between December 18, 2025 and January 14, 2026 for an aggregate $287,433,279.73, funded with cash on hand under a previously disclosed 10b5-1 purchase plan with Jefferies LLC.
Following these transactions, Mitsui Sumitomo beneficially owns 52,726,504 shares of W. R. Berkley common stock, representing 13.9% of the 380,021,174 shares outstanding as of October 28, 2025. As Mitsui Sumitomo is a wholly owned subsidiary, MS&AD Insurance Group Holdings may be deemed an indirect beneficial owner of these shares but disclaims beneficial ownership. The filing also notes that WR Berkley & Others LLC (Family Holdings) beneficially owns 67,069,033 shares, or approximately 17.6% of the outstanding shares, which the reporting persons may be deemed to share voting power over under certain agreements, while not admitting they form a group.
Mitsui Sumitomo Insurance Co., Ltd., a more than 10% owner of W.R. Berkley Corporation, reported multiple open-market purchases of W.R. Berkley common stock. On January 12, 2026, it bought 256,041 shares at a weighted average price of $68.7344 per share, followed by additional purchases on January 13 and 14, 2026 at weighted average prices between $67.8241 and $69.2333 per share. After these transactions, it directly held 52,726,504 shares of W.R. Berkley common stock. The filing notes that these trades were made under a Rule 10b5-1 purchase plan adopted on October 3, 2025, and that MS&AD Insurance Group Holdings, Inc. may be deemed to beneficially own the securities through its wholly owned subsidiary but disclaims beneficial ownership except for its pecuniary interest.
Mitsui Sumitomo Insurance Co., Ltd., a 10% owner of W. R. Berkley Corporation, reported open-market purchases of the issuer’s common stock on January 8 and 9, 2026 under a Rule 10b5-1 purchase plan adopted on October 3, 2025. On those dates, Mitsui Sumitomo bought several blocks of shares at weighted average prices ranging from about $68.48 to $70.32 per share. Following the final reported trade, the filing shows 51,915,463 shares of W. R. Berkley common stock beneficially owned in direct form. Because Mitsui Sumitomo is a wholly owned subsidiary of MS&AD Insurance Group Holdings, Inc., MS&AD may be deemed to beneficially own these securities but expressly disclaims beneficial ownership except to the extent of its pecuniary interest.
Mitsui Sumitomo Insurance Co., Ltd., a 10% owner of W.R. Berkley Corporation, reported a series of open-market purchases of W.R. Berkley common stock executed under a Rule 10b5-1 purchase plan adopted on October 3, 2025.
On January 5–7, 2026, Mitsui Sumitomo recorded multiple buy transactions, including 153,686 shares at a weighted average price of $70.7775 on January 5 and 254,622 shares at a weighted average price of $68.4677 on January 7. Following the final reported trade, Mitsui Sumitomo is shown as beneficially owning 51,445,463 W.R. Berkley common shares directly.
The filing notes that these prices are weighted averages for numerous trades within stated price ranges and that additional detail is available on request. It also states that Mitsui Sumitomo is a wholly owned subsidiary of MS&AD Insurance Group Holdings, Inc., which may be deemed to beneficially own the securities but expressly disclaims beneficial ownership except to the extent of its pecuniary interest.
W.R. Berkley Corporation insider Mitsui Sumitomo Insurance Co., Ltd., together with MS&AD Insurance Group Holdings, reported sizable open-market purchases of common stock under a pre-arranged Rule 10b5-1 trading plan adopted on October 3, 2025. On December 30, 2025, the reporting persons bought 205,000 shares at a weighted average price of $70.8284, bringing their beneficial holdings to 50,296,511 shares. On December 31, 2025, they purchased another 230,000 shares at a weighted average price of $70.2652, increasing holdings to 50,526,511 shares. On January 2, 2026, they bought a further 237,734 shares at a weighted average price of $69.3477, resulting in beneficial ownership of 50,764,245 shares held directly by Mitsui Sumitomo Insurance. The reporting persons state these prices reflect multiple trades within disclosed price ranges and clarify that MS&AD’s interest is through its wholly owned subsidiary.
Mitsui Sumitomo Insurance Co., Ltd., a director of W.R. Berkley Corporation, reported a series of open‑market purchases of WRB common stock in late December 2025. On December 23, 2025, it bought 232,546 shares at a weighted average price of $70.3106 and 2,027 shares at $71.1535. Additional purchases of 220,000 shares were made on December 24 and December 26, and 205,000 shares on December 29, at weighted average prices between $70.5093 and $70.7726. After these transactions, Mitsui Sumitomo reported beneficial ownership of 50,091,511 WRB shares held directly. The trades were executed under a Rule 10b5‑1 purchase plan adopted on October 3, 2025, and the filing notes that prices reflect weighted averages over multiple trades within stated ranges.
Mitsui Sumitomo Insurance Co., Ltd. (MSI), together with its parent MS&AD Insurance Group Holdings, Inc., reported open-market purchases of W. R. Berkley Corporation common stock. On December 18, 2025, MSI bought 204,350 shares at a weighted average price of $69.3815 per share under a Rule 10b5-1 purchase plan adopted on October 3, 2025. On December 19, 2025, it acquired another 204,000 shares at a weighted average of $69.503.
On December 22, 2025, MSI purchased 39,940 shares at a weighted average price of $69.9716 and 162,060 shares at a weighted average of $70.3257. Following these transactions, MSI is shown as beneficially owning 49,211,938 W. R. Berkley shares in direct form. MS&AD may be deemed to beneficially own these securities through its 100% ownership of MSI but expressly disclaims beneficial ownership except to the extent of its pecuniary interest.