Spark I Acquisition Corp. is a blank check company formed as a special purpose acquisition vehicle for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization, or similar business combination with one or more operating businesses. The company focuses primarily on identifying and acquiring growth-oriented enterprises across technology-driven sectors, including clean technology, advanced materials, and industrial innovation. Spark I Acquisition Corp. operates within the financial services and capital markets industry, offering capital formation and public listing sponsorship; target identification, strategic due diligence, and valuation structuring; equity financing and private investment in public equity transaction facilitation; corporate reorganization and merger execution; and post-combination transitional governance support. Founded in 2021 as a Cayman Islands exempted company, the firm maintains its principal executive offices in Palo Alto, California, United States, and directs its investment activities across North America and global markets. In recent operational developments, Spark I Acquisition Corp. entered into a definitive business combination agreement in June 2026 with ZincFive, Inc., an Oregon-based developer and manufacturer of nickel-zinc battery and uninterruptible power supply energy storage solutions, in a transaction establishing a pro forma enterprise value of approximately $752 million. The transaction is supported by approximately $125 million in gross proceeds, comprising a $100 million committed private investment in public equity financing and trust account capital. In September 2026, the company filed a Form S-4 registration statement with the U.S. Securities and Exchange Commission and initiated a corporate domestication from the Cayman Islands to Delaware, with the combined public entity scheduled to list on the Nasdaq Stock Market under the ticker symbol ZFIV. Furthermore, the company secured shareholder approval to extend its combination deadline to March 2027 alongside supplemental trust account contributions, and in October 2026 transitioned its over-the-counter trading ticker symbol from SPKL to SPKLF.