Adtheorent SPAC Presentation Deck

DISCLAIMER ADTHEORENT Additional Information and Where to Find It MCAP intends to file with the SEC a registration statement on Form S-4 that will include a proxy statement and prospectus of MCAP. The definitive proxy statement/prospectus will be sent to all MCAP stockholders as of a record date to be established for voting on the Proposed Business Combination and other matters as may be described in the registration statement. MCAP and AdTheorent also will file other documents regarding the Proposed Business Combination with the SEC. Before making any voting decision, investors and security holders of MCAP are urged to carefully read the entire registration statement, the proxy statement/prospectus and all other relevant documents filed or that will be filed with the SEC, as well as any amendments or supplements to these documents, in connection with the Proposed Business Combination as they become available because they will contain important information about the proposed transaction. Investors and security holders will be able to obtain free copies of the registration statement, proxy statement/prospectus and all other relevant documents filed or that will be filed with the SEC by MCAP or AdTheorent through the website maintained by the SEC at www.sec.gov. In addition, the documents filed by MCAP may be obtained free of charge from MCAP's website at https://www.mcapacquisition corp.com/ or by written request to MCAP at 311 South Wacker Drive, Suite 6400, Chicago, Illinois 60606 and the documents filed by AdTheorent may be obtained free of charge from AdTheorent's website at https://www.adtheorent.com/ or by written request to AdTheorent at 330 Hudson St, New York, NY 10013. Participants in Solicitation MCAP and AdTheorent and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from MCAP's stockholders in connection with the Proposed Business Combination. Information about MCAP's directors and executive officers and their ownership of MCAP's securities is set forth in MCAP's filings with the SEC, including MCAP's final prospectus relating to its initial public offering dated February 25, 2021. Additional information regarding the interests of those persons and other persons who may be deemed participants in the proposed transaction may be obtained by reading the proxy statement/prospectus regarding the proposed transaction, when available. Industry and Market Data This presentation has been prepared by AdTheorent and MCAP and includes market data and other statistical information from sources believed by AdTheorent and MCAP to be reliable, including independent industry publications, governmental publications or other published independent sources. Some data is also based on the good faith estimates of AdTheorent or MCAP, which in each case are derived from its review of internal sources as well as the independent sources described above. Although AdTheorent and MCAP believe these sources are reliable, AdTheorent and MCAP have not independently verified the information and cannot guarantee its accuracy and completeness. Financial Information; Non-GAAP Financial Measures The historical financial information and data contained in this presentation is unaudited, based on draft statutory accounts, does not conform to Regulation S-X, and is subject to PCAOB audit. Accordingly, such information and data may not be included in, may be adjusted in or may be presented differently in the final registration statement to be filed with the SEC and the definitive proxy statement/prospectus contained therein. Some of the financial information and data contained in this presentation, such as EBITDA, Adjusted EBITDA, EBITDA margin and Adjusted EBITDA Margin, has not been prepared in accordance with U.S. Generally Accepted Accounting Principles ("GAAP"). EBITDA is defined as loss after tax from continuing operations, before income tax credit, finance income, finance costs, depreciation, amortization, share-based payment charges and exceptional items. EBITDA margin is defined as EBITDA divided by revenue. For a detailed reconciliation of Adjusted EBITDA to EBITDA, see the appendix in this presentation. AdTheorent believes these non-GAAP measures of financial results provide useful information to management and investors regarding certain financial and business trends relating to AdTheorent's financial condition and results of operations. AdTheorent's management uses these non-GAAP measures for trend analyses and for budgeting and planning purposes. AdTheorent and MCAP believe that the use of these non-GAAP financial measures provides an additional tool for investors to use in comparing AdTheorent's financial condition and results of operations with other similar companies, many of which present similar non-GAAP financ measures to investors. However, other companies may calculate the non-GAAP measures differently, and therefore the non-GAAP measures in this presentation not be directly comparable to similarly titled measures of other companies. Management does not consider these non-GAAP measures in isolation or as an alternative to financial measures determined in accordance with GAAP. The principal limitation of these non- GAAP financial measures is that they exclude significant expenses and income that are required by GAAP to be recorded in AdTheorent's financial statements. In addition, they are subject to inherent limitations as they reflect the exercise of judgments by management about which expenses and income are excluded and included in determining these non-GAAP financial measures. A reconciliation of non-GAAP financial measures in this presentation to the most directly comparable GAAP financial measures is not included, because, without unreasonable effort, AdTheorent is unable to predict with reasonable certainty the amount or timing of non-GAAP adjustments that are used to calculate these non- GAAP financial measures. No Offer or Solicitation This presentation does not constitute an offer to sell or exchange, or the solicitation of an offer to buy or exchange, any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, sale or exchange would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. Use of Projections Any financial information in this presentation (including specifically the projections) that are forward-looking statements are based on assumptions that are inherently subject to significant uncertainties and contingencies, many of which are beyond AdTheorent's and MCAP's control. While such information and projections are necessarily speculative, AdTheorent and MCAP believe that the preparation of prospective financial information involves increasingly higher levels of uncertainty the further out the projection extends from the date of preparation. The assumptions and estimates underlying the projected results are inherently uncertain and are subject to a wide variety of significant business, economic and competitive risks and uncertainties that could cause actual results to differ materially from those contained in the projections. All subsequent written and oral forward-looking statements concerning AdTheorent and MCAP, the proposed transactions or other matters and attributable to AdTheorent and MCAP or any person acting on their behalf are expressly qualified in their entirety by the cautionary statements above. Trademarks This presentation contains trademarks, service marks, trade names and copyrights of AdTheorent, MCAP and other companies, which are the property of their respective owners. Confidential | Page 3