Exhibit 5.1
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March 15, 2023
AdTheorent Holding Company, Inc.
330 Hudson Street, 13th Floor
New York, NY 10013
Re: Registration Statement on Form S-3
Ladies and Gentlemen:
We have acted as counsel to AdTheorent Holding Company, Inc., a Delaware corporation (the “Company”), in connection with the preparation and filing with the U.S. Securities and Exchange Commission (the “Commission”), pursuant to the Securities Act of 1933, as amended (the “Securities Act”), of the Post-Effective Amendment No. 2 to the Registration Statement on Form S-3 of the Company (the “Registration Statement”), including a related prospectus filed with the Registration Statement (the “Prospectus”) relating to (a) the issuance of shares of the Company’s common stock, $0.0001 par value per share (“Common Stock”), upon the exercise of warrants issued by the Company, and (b) the resale of shares of Common Stock and warrants issued by the Company and held by certain stockholders and holders of outstanding equity awards (the “Equity Awards”) and warrants of the Company, as follows:
| (i) | the issuance of up to 5,432,237 shares (the “Private Warrant Shares”) of Common Stock upon the exercise of certain outstanding warrants (the “Private Warrants”); |
| (ii) | the issuance of up to 10,541,667 shares (the “Public Warrant Shares” and, together with the Private Warrant Shares, the “Warrant Shares”) of Common Stock upon the exercise of certain outstanding warrants (the “Public Warrants” and, together with the Private Warrants, the “Warrants”); |
| (iii) | the resale of up to 5,432,237 Private Warrants (the “Resale Warrants”); and |
| (iv) | the resale of up to 76,713,193 shares of Common Stock, consisting of (a) 5,432,237 Private Warrant Shares, (b) 66,999,454 shares of Common Stock held by certain stockholders of the Company and (c) 4,281,502 shares of Common Stock (the “Equity Award Shares”) issuable upon the exercise of certain outstanding Equity Awards) (collectively, the “Selling Stockholder Shares”). |
The Warrants were issued pursuant to a Warrant Agreement, dated February 25, 2021, (the “Warrant Agreement”), between MCAP Acquisition Corporation, a Delaware corporation, the Company’s predecessor, and Continental Stock Transfer & Trust Company, as warrant agent. The Equity Award Shares will be issued upon the exercise or vesting of certain outstanding Equity Awards pursuant to the AdTheorent Holding Company, LLC 2017 Interest Option Plan (the “2017 Plan”). The Warrant Shares, the Warrants and the Selling Stockholder Shares are collectively referred to herein as the “Securities”.
In rendering the opinion set forth herein, we have examined the originals, or photostatic or certified copies, of (i) the Second Amended and Restated Certificate of Incorporation and Bylaws of the Company, (ii) the Registration Statement and all exhibits thereto, (iii) certain resolutions of the Board of Directors of the Company related to the filing of the Registration Statement, the authorization and issuance of the Securities and related matters; and