MCAP Acquisition Corporation MCAP Acquisition Corporation (MACQU) is a blank check company, or special purpose acquisition company (SPAC), formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses, with a focus on software, technology-enabled and business services companies; it currently holds no significant operations or revenue-generating activities. Incorporated in 2020 and headquartered in Chicago, Illinois, the company is sponsored by MCAP Acquisition, LLC, an affiliate of Monroe Capital LLC, a boutique asset management firm specializing in private credit strategies including direct lending, asset-based lending, specialty finance, opportunistic credit and equity investments across North America. MCAP Acquisition Corporation's securities, including units, Class A common stock and warrants, trade on the Nasdaq Capital Market under the tickers MACQU, MACQ and MACQW, respectively.
In March 2021, MCAP Acquisition Corporation completed an upsized initial public offering raising $316 million through the sale of 31.6 million units at $10 each, with the underwriters exercising their full over-allotment option; in April 2021, the company announced the separate trading of its Class A common stock and warrants. The company entered into a definitive business combination agreement with AdTheorent, Inc., a New York-based programmatic digital advertising platform leveraging machine learning and privacy-forward solutions, which included a $121.5 million PIPE financing anchored by investors such as Hana Financial Group, Monroe Capital affiliates and Palantir Technologies; stockholders approved the transaction in December 2021, valuing AdTheorent at a pro forma enterprise value of $775 million, after which the combined entity began trading as AdTheorent Holding Company, Inc. under the ticker ADTH. As of late 2025, MCAP Acquisition Corporation units continue to trade on Nasdaq, with no further merger activity or operational developments publicly announced within the last 1-2 years.