Perception Capital Corp. II Perception Capital Corp. II, a blank check company incorporated in the Cayman Islands in 2021 and headquartered in Wayzata, Minnesota, has no significant ongoing operations and focuses on effecting a merger, share exchange, asset acquisition, share purchase, reorganization, or similar business combination with one or more businesses, particularly in the technology-enabled sector including industrial technology, automation, and sustainability; its securities consist of units (PCCTU) comprising one Class A ordinary share and one-half of a redeemable warrant exercisable at $11.50 per whole share. The company conducted an initial public offering in October 2021 raising approximately $200 million in units underwritten by Jefferies and others, with proceeds held in trust for a potential business combination. In its most significant development, Perception Capital Corp. II completed a business combination with Spectaire Inc. in October 2023, resulting in Spectaire Holdings Inc. (trading as SPEC and SPECW on Nasdaq), a provider of emissions monitoring solutions via its patented AireCore micro-mass-spectrometer platform for measuring, managing, and reducing greenhouse gas emissions; post-merger, PCCTU units were suspended from trading effective October 20, 2023, though they continue to appear in select market data with recent pricing around $9.39 as of late 2025, while the sponsor Perception Capital Partners II LLC maintains involvement through historical ties and legacy agreements.