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Exhibit 99.1 PRESS RELEASE REPORT OF EARNINGS AND DIVIDEND DECLARATION November 3, 2026 Merriam, Kansas The following is a report of earnings for Seaboard Corporation (NYSE American symbol: SEB), with offices at 9000 West 67th Street, Merriam, Kansas, for the three and nine months ended October 3, 2026 and September 27, 2025, in millions of dollars except share and per share amounts. (UNAUDITED) Three Months Ended Nine Months Ended October 3, September 27, October 3, September 27,        2026        2025        2026        2025 Net sales $ 2,771 $ 2,540 $ 8,093 $ 7,336 Operating income $ 13 $ 84 $ 209 $ 174 Net earnings attributable to Seaboard $ 28 $ 109 $ 300 $ 243 Earnings per common share $ 29.23 $ 113.71 $ 313.22 $ 251.47 Average number of shares outstanding 957,794   958,618 957,794   966,315 Dividends declared per common share $ 2.25 $ 2.25 $ 6.75 $ 6.75 Seaboard Corporation today filed its Quarterly Report on Form 10-Q with the United States Securities and Exchange Commission. Seaboard Corporation has provided access to the Quarterly Report on Form 10-Q on its website at https://www.seaboardcorp.com/investors. Also, Seaboard Corporation announced today that its Board of Directors has authorized and declared a quarterly cash dividend of $2.25 per share of its common stock. The dividend is payable on November 23, 2026 to stockholders of record at the close of business on November 13, 2026.