Sec Form 4 Filing - Rainer David I @ CU Bancorp - 2013-08-21

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Rainer David I 2. Issuer Name and Ticker or Trading Symbol CU Bancorp [ CUNB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chairman, President, CEO (Last) (First) (Middle) C/O CU BANCORP 15821, VENTURA BLVD., SUITE 100 3. Date of Earliest Transaction (MM/DD/YY) 08/21/2013 (Street) ENCINO, CA91436 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock ( 4 ) 08/21/2013 M( 2 ) 2,116 A $ 10 64,467 D Common Stock ( 4 ) 08/21/2013 S( 3 ) 2,116 D $ 17.222 62,351 D Common Stock 31,500 I IRA Common Stock 111,894 I Trustee of the David and Anne Rainer Trust

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Options to purchase common stock $ 10 08/21/2013 M( 1 ) 2,116 05/17/2006( 1 ) 05/17/2015 Common Stock ( 1 ) $ 0 197,658 ( 1 ) D Options to purchase common stock $ 22 04/26/2007( 5 ) 04/25/2016 Common Stock 10,000 10,000 D Options to purchase common stock $ 17.5 02/27/2008( 6 ) 02/26/2017 Common Stock 60,000 60,000 D Options to purchase common stock $ 16 09/25/2008( 7 ) 09/24/2017 Common Stock 23,333 23,333 D Options to purchase common stock $ 12.2 04/27/2011( 8 ) 04/27/2017 Common Stock 10,000 10,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Rainer David I C/O CU BANCORP 15821, VENTURA BLVD. SUITE 100 ENCINO, CA91436 X Chairman, President, CEO Signatures David Rainer by Anita Y. Wolman, Attorney-in-fact 08/22/2013 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Exercise of 2,116 stock options from the 218,750 total shares granted under the 2005 Stock Option Plan to the reporting person on May 17, 2005. As of the date of this report, all options are fully vested and exercisable. 698, 11,170 and 7,108 stock options were exercised on August 16, 2013, August 19, 2013 and August 20, 2013, respectively. ( 2 )Acquisition of 2,116 shares of common stock through exercise of stock options granted under the 2005 Stock Option Plan to the reporting person on May 17, 2005. ( 3 )Sale of 2,116 shares of common stock acquired through the exercise of stock options granted under the 2005 Stock Option Plan to the reporting person on May 17, 2005 ( 4 )Includes shares of restricted stock subject to a vesting schedule set forth in the restricted stock grant and subject to forfeiture upon the occurrence of certain events specified in the restricted stock grant. ( 5 )Stock options were granted to the reporting person on April 26, 2006. The options vested in four equal annual installments on each of April 26, 2007, 2008, 2009 and 2010, and as of the filing date are fully vested. ( 6 )Stock options were granted to the reporting person on February 27, 2007. The options vested in four equal annual installments on each of February 27, 2008, 2009, 2010 and 2011, and as of the filing date are fully vested. ( 7 )Stock options were granted to the reporting person on September 25, 2007. The options vested in four equal annual installments on each of September 25, 2008, 2009, 2010 and 2011, and as of the filing date are fully vested. ( 8 )Stock options were granted to the reporting person on April 27, 2010. The options vested in five equal annual installments on each of April 27, 2011, 2012, 2013, 2014 and 2015.

Remarks: Power of attorney filed as Exhibit 24 on August 16, 2012.Restated beneficial ownership of the reporting person.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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