AMCI Acquisition Corp. II operates as a blank check company, or special purpose acquisition company (SPAC), focused on effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization, or similar business combination with one or more businesses, particularly those providing energy transition, decarbonization, or sustainability solutions to the industrial complex; its securities include units, common stock, and public warrants trading under tickers AMCIU, AMCI, and AMCIW, respectively, on Nasdaq. Founded in 2021 and headquartered in Greenwich, Connecticut, the company, sponsored by an affiliate of AMCI Group, completed its initial public offering in August 2021 raising approximately $150 million in proceeds held in trust. In February 2023, AMCI Acquisition Corp. II closed a $2.4 billion business combination with LanzaTech NZ, Inc., a carbon capture and transformation company, through which the combined entity was renamed LanzaTech Global, Inc. and began trading under LNZA and LNZAW, while AMCIW warrants persist as legacy securities exercisable into LanzaTech common stock subject to post-merger terms including potential reset provisions. The SPAC received gross proceeds of about $240 million from the PIPE investment anchored by strategic partners such as ArcelorMittal, BASF, Mitsui, and Trafigura to fund LanzaTech's commercial expansion and technology deployment. As of December 2025, AMCIW trades actively at around $0.35 with no subsequent mergers or liquidations announced for the SPAC shell.