Filed Pursuant to Rule 424(b)(3) Registration No. 333-210880

CIM COMMERCIAL TRUST CORPORATION

SUPPLEMENT NO. 3, DATED OCTOBER 9, 2018

TO THE PROSPECTUS, DATED APRIL 11, 2018

This prospectus supplement (this “Supplement No. 3”) is part of the prospectus of CIM Commercial Trust Corporation (the “Company”), dated April 11, 2018 (the “Prospectus”), as supplemented by Supplement No. 1, dated May 14, 2018 (“Supplement No.  1”), and Supplement No. 2, dated August 9, 2018. This Supplement No. 3 supplements certain information contained in the Prospectus. This Supplement No. 3 should be read, and will be delivered, with the Prospectus and Supplement No. 1 and Supplement No. 2. Unless otherwise defined in this Supplement No. 3, capitalized terms used in this Supplement No. 3 shall have the same meanings as set forth in the Prospectus.

The purpose of this Supplement No. 3 is to attach as Annex A a Current Report on Form 8-K (excluding the exhibit thereto) that the Company filed with the SEC on October 5, 2018.

Annex A

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

Date of report (Date of earliest event reported): October 5, 2018

Commission File Number 1-13610

CIM COMMERCIAL TRUST CORPORATION

(Exact name of registrant as specified in its charter)

Former name, former address and former fiscal year, if changed since last report: NONE

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:

o                 Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o                 Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o                 Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o                 Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Emerging growth company  o

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.  o

Item 8.01                   Other Events.

On October 5, 2018, CIM Commercial Trust Corporation (the “Company”) published a presentation to provide a strategic update to its investors (the “Update”). The Update describes a potential recapitalization (the “Potential Recapitalization”) that the Company is considering in order to, among other things, provide its shareholders with liquidity approximating the net asset value per share of the common stock, par value $0.001 per share, of the Company (the “Common Stock”) and improve the trading volume and liquidity of the Common Stock. The Potential Recapitalization involves a series of potential transactions as described in the Update. There can be no guarantee that the Potential Recapitalization will occur or, if it occurs, that any or all of its components will occur in the form or manner described in the Update.

A copy of the Update is attached to this Form 8-K as Exhibit 99.1 and is incorporated by reference herein. Additionally, the Company has posted a copy of its Update on its Shareholder Relations page at http://shareholders.cimcommercial.com/.

The information in this Item 8.01 and Exhibit 99.1 are being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01                   Financial Statements and Exhibits.

2

SIGNATURE

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 thereunto duly authorized.

3