SEC Form 4

FORM 4		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 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Leitzinger Jeffrey J (Last) (First) (Middle) C/O CU BANCORP 15821 VENTURA BOULEVARD, SUITE 100 (Street) ENCINO CA 91436 (City) (State) (Zip)	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 Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 10/20/2017
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	10/20/2017		D		84,854	D	(1)(2)	0	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. On October 20, 2017, pursuant to the Agreement and Plan of Merger, dated as of April 5, 2017, by and between PacWest Bancorp ("PacWest") and CU Bancorp ("CUB"), CUB merged with and into PacWest ("Merger"), and each outstanding CUB common share, other than excluded shares and dissenting shares, was converted into the right to receive (i) $12.00 in cash and (ii) 0.5308 of a share of PacWest common stock, with cash payable in lieu of a fractional share in an amount equal to the fraction of a share of PacWest common stock which the holder would otherwise be entitled to receive multiplied by $48.9248. In connection with the Merger, the reporting person has the right to receive, in exchange for all of the CUB common shares reported in Table I, an aggregate of 45,040 shares of PacWest common stock and $1,018,248 in cash, with cash payable in lieu of a fractional share of PacWest common stock, subject to any required tax withholding under applicable law. [Continued in FN2]

2. [Continued from FN1] On October 20, 2017, the effective date of the Merger, the closing price of PacWest common stock was $47.99 per share.

Remarks:

	Jeffrey J. Leitzinger, By: Anita Y. Wolman, Attorney-in-Fact	10/23/2017
	** Signature of Reporting Person	Date
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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