Energy Transition Special Opportunities (ticker: CLSO) filed an amended S-1/A registration statement with the SEC on April 24, 2026, advancing the blank-check company's path toward an initial public offering in the energy transition sector. The SPAC is organized to identify and acquire businesses tied to clean energy and the broader energy transition industry. An S-1/A is an amendment to an initial registration filing, indicating the offering had not yet been declared effective as of the submission date and that the company was continuing to refine its prospectus ahead of launch. The sponsor was not identified in the data available for this summary. Visit SpacDesk to access the full CLSO deal profile, sponsor details, and comparable filings.