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): August 14, 2013

CU BANCORP

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (818) 257-7700

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

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

CU Bancorp Chief Executive Officer, David I. Rainer and Chief Financial Officer, Karen Schoenbaum, will make a presentation to shareholders at the CU Bancorp Annual Shareholders Meeting to be held August 20, 2013 at the Warner Center Marriott Hotel, 21850 Oxnard Street, Woodland Hills, California, 91367 at 9:00 a.m. A copy of the presentation materials is attached as Exhibit 99.1 to this Current Report on Form 8-K. The information in this report (including Exhibit 99.1) shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other documents filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

As discussed therein, the slide presentation furnished as Exhibit 99.1 to this Current Report on Form 8-K contains forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act and, as such, may involve known and unknown risks, uncertainties and assumptions. These forward-looking statements relate to the Company’s current expectations and are subject to the limitations and qualifications set forth in the presentation as well as in the Company’s other documents filed with the Securities and Exchange Commission, including, without limitation, that actual events and/or results may differ materially from those projected in such forward-looking statements.

Exhibit 99.1

Copy of presentation materials which CU Bancorp Chief Executive Officer, David I. Rainer and Chief Financial Officer, Karen Schoenbaum will provide to shareholders at the CU Bancorp Annual Shareholders Meeting to be held August 20, 2013 at the Warner Center Marriott Hotel, 21850 Oxnard Street, Woodland Hills, California, 91367 at 9:00 a.m. (Furnished pursuant to Regulation FD).

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 hereunto duly authorized.

EXHIBIT INDEX