RMG Acquisition Corp. III (ticker: RMGCF) is a blank-check company sponsored by RMG Sponsor III, LLC, an affiliate of RMG Partners, the clean-energy-focused SPAC platform led by principals Bob Mancini and Philip Kassin. The vehicle completed its initial public offering in 2021 with a stated mandate to pursue targets in the sustainable energy and clean technology sectors. Its Form 10-K filed in April 2023 indicated the company remained in the business-combination search phase, having extended its deadline beyond the original window. RMG's earlier vehicles closed deals in the energy transition space, including mergers with Romeo Power and ReNew Power. Sign up at SpacDesk for full filing histories, extension timelines, and SPAC analytics on RMG Acquisition Corp. III and the broader market.