Plum Acquisition Corp. IV (PLMK), a Special Purpose Acquisition Company (SPAC), entered into a definitive Business Combination Agreement with Controlled Thermal Resources Holdings Inc. (CTR) on March 8, 2026. The merger will result in CTR continuing as the surviving company, with PLMK domesticating as a Delaware corporation prior to closing. The company completed its initial public offering on January 16, 2025, raising gross proceeds of $172,500,000 from the sale of 17,250,000 units, including the full exercise of the underwriters' over-allotment option. A simultaneous private placement generated gross proceeds of $6,728,750 from the sale of 672,875 private placement units and 570,000 restricted private placement shares. As of December 31, 2025, the trust account held approximately $181,285,220. The company reported a net income of $6,051,821 for the year ended December 31, 2025, primarily driven by $7,060,220 in interest earned on investments held in the trust account. A working capital deficit of $70,710 was reported as of December 31, 2025, with cash of $296,249. An unsecured promissory note of up to $1,500,000 was issued to the sponsor on July 8, 2025, with $250,000 outstanding as of December 31, 2025, convertible into shares at $10.00 per unit upon business combination. The deadline to complete a business combination is July 16, 2026, or an earlier liquidation date approved by the board.