Rainier Acquisition Corporation is a special purpose acquisition company focused on effecting a merger, amalgamation, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses; it is headquartered in New York, New York, and was formed in 2026. The company’s primary securities are its IPO units, Class A ordinary shares and redeemable warrants, with each unit consisting of one Class A ordinary share and one-quarter of one warrant; each whole warrant entitles the holder to purchase one Class A ordinary share at an exercise price of $11.50 per share, subject to adjustment. Rainier Acquisition Corporation completed its initial public offering of 8,625,000 units at $10.00 per unit, raising $86.25 million in gross proceeds after the underwriter’s full exercise of the over-allotment option. In September 2026, the company announced the separate trading of its IPO securities, with the Class A ordinary shares to trade under the symbol RNAQ and the warrants under RNAQW on Nasdaq, while the bundled units continue to trade under RNAQU. The company’s latest major operational change is the transition from unit trading to separate trading of shares and warrants, expanding the tradable structure of its capital markets securities as it advances its search for a business combination.