Altitude Acquisition Corp. (Nasdaq: ALTUW) is a blank check company, or special purpose acquisition company (SPAC), incorporated in Delaware in 2020 and headquartered in Atlanta, Georgia, that focuses on effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses, with an initial target focus on travel, travel technology and travel-related businesses including booking engines, revenue and expense management services, travel management companies, alternative accommodations and mobile-based solutions serving both business-to-business and business-to-consumer markets on a global basis. The company does not engage in direct operations or generate revenue from products or services but instead serves as an investment vehicle to provide public market access and capital to high-growth targets in its sectors of interest. In recent developments, Altitude pursued a business combination with Picard Medical and its subsidiary SynCardia Systems, filing a preliminary merger proxy statement in September 2023 before terminating the agreement; it subsequently signed a business combination agreement in February 2024 with Vesicor Therapeutics, an early-stage biopharmaceutical developer of microvesicle-based therapies, at a $70 million pre-money equity valuation with approximately $10.3 million in trust proceeds, though the deal faced a potential termination deadline of October 1, 2024 (extendable to December 11); multiple extensions of its initial business combination deadline were granted through March 11, 2024, culminating in the March 12, 2024 announcement of trust account liquidation, public share redemptions and Nasdaq delisting upon failure to complete a transaction within the required timeframe, with subsequent SEC filings in April 2024 confirming termination of securities registration and removal from listing.