UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

Current Report

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

May 20, 2021

Date of Report (Date of earliest event reported)

Mountain Crest Acquisition Corp. III

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number, including area code: (646) 493-6558

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 3.02. Unregistered Sales of Equity Securities.

The information included in Item 8.01 is incorporated into this Item by reference.

Item 8.01. Other Events

As previously disclosed on a Current Report on Form 8-K dated May 21, 2021, on May 20, 2021 Mountain Crest Acquisition Corp. III (the “Company”) consummated the IPO of 5,000,000 units (the “Units”). Each Unit consists of one share of common stock, $0.0001 par value (“Common Stock”), and one right (“Right”) to receive one-tenth (1/10) of a share of common stock upon the consummation of an initial business combination. The Units were sold at an offering price of $10.00 per Unit, generating gross proceeds of $50,000,000. The Company granted the underwriters a 45-day option to purchase up to 750,000 additional Units to cover over-allotments, if any.

Simultaneously with the closing of the IPO, the Company consummated the private placement (“Private Placement”) with Mountain Crest Holdings III LLC and Chardan Capital Markets, LLC of 185,000 units (the “Private Units”), generating total proceeds of $1,850,000. The Private Units are identical to the Units sold as part of the public Units in this offering. Additionally, such initial purchasers agreed not to transfer, assign or sell any of the Private Units or underlying securities (except in limited circumstances, as described in the Registration Statement) until the completion of the Company’s initial business combination. Such initial purchasers were granted certain demand and piggyback registration rights in connection with the purchase of the Private Units. The Private Units were issued pursuant to Section 4(a)(2) of the Securities Act of 1933, as amended, as the transactions did not involve a public offering.

As of May 20, 2021, a total of $50,000,000 of the net proceeds from the IPO and the private placement were placed in a trust account established for the benefit of the Company’s public shareholders.

An audited balance sheet as of May 20, 2021 reflecting receipt of the proceeds upon consummation of the IPO and the private placement is included with this report as Exhibit 99.1.

Item 9.01. Financial Statements and Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: May 26, 2021

MOUNTAIN CREST ACQUISITION CORP. III