Material Event (Form 8-K)

NEW YORK, August 4, 2026 - JAB Acquisition Corp I (the "Company") (NASDAQ: JABRU) announced today that, commencing on August 5, 2026, holders of the 17,250,000 units (the "Units") sold in the Company's initial public offering (the "Offering"), may elect to separately trade the Class A ordinary shares, rights (the "Rights") and warrants (the "Warrants") included in the Units. Each Unit consists of one Class A ordinary share, one Right to receive one-fourth (¼th) of one Class A ordinary share and one redeemable Warrant to purchase one Class A ordinary share at a price of $11.50 per share, subject to certain adjustments. Any Units not separated will continue to trade on the NASDAQ Stock Market ("NASDAQ") under the symbol "JABRU." Any underlying Class A ordinary shares, Rights and Warrants that are separated will trade on the NASDAQ under the symbols "JAB," "JABRR" and "JABRW," respectively. No fractional Warrants, Rights or Shares will be issued upon separation of the Units, and only whole Warrants, Rights and Shares will trade. Holders of Units will need to have their brokers contact the Company's transfer agent, Continental Stock Transfer & Trust Company, in order to separate the holders' Units into Class A ordinary shares, Rights and Warrants.

The Units were initially offered by the Company in an underwritten offering. D. Boral Capital LLC acted as sole book-running manager for the offering. A registration statement on Form S-1, as amended (File No. 333-296035) (the "Registration Statement") relating to these securities was declared effective by the U.S. Securities and Exchange Commission (the "SEC") on June 9, 2026. The offering is being made only by means of a prospectus. When available, copies of the prospectus may be obtained from: D. Boral Capital LLC, 590 Madison Avenue, 39th Floor, New York, NY 10022, or by emailing [email protected], or by accessing the SEC's website at www.sec.gov.