RMG Acquisition Corp. III (RMGCU) operates as a blank check company whose principal business activity is to effect a merger, amalgamation, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses or entities. The company generates no revenue and conducts no significant operations; it focuses exclusively on identifying and completing a business combination, targeting companies valued between $1 billion and $4 billion, with redeemable warrants exercisable at $11.50 per Class A ordinary share. Incorporated in 2020 as a Cayman Islands exempted company and headquartered at 57 Ocean in Miami Beach, Florida, RMG Acquisition Corp. III trades its units on Nasdaq under the ticker RMGCU and is a subsidiary of RMG Sponsor III, LLC, with key management including Chief Executive Officer Robert S. Mancini and Chairman D. James Carpenter. In recent developments, the company entered a merger agreement with H2B2 Electrolysis Technologies in May 2023 that terminated due to market conditions; extended its completion deadline multiple times through amendments to its memorandum and articles, including a fifth amendment; effected Class B to Class A ordinary share conversions for sponsor shares on December 26, 2023; faced Nasdaq delisting via Form 25 filed on June 28, 2024; and announced liquidation on July 9, 2025, redeeming public Class A shares at approximately $10.00 per share, appointing Alvarez & Marsal Cayman Islands Limited as voluntary liquidators, cancelling shares effective that date, allowing warrants to expire worthless, and planning a Form 15 filing to terminate SEC registration.