X0306 4 2017-10-20 1 0001543643 CU Bancorp CUNB 0001555310 Selleck Daniel F C/O CU BANCORP 15821 VENTURA BLVD. SUITE 100 ENCINO CA 91436 1 0 0 0 Common Stock 2017-10-20 4 D 0 2470 D 0 D Common Stock 2017-10-20 4 D 0 35650 D 0 I Trustee of the Daniel F. Selleck Family Trust 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 20,234 shares of PacWest common stock and $457,440 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] [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. Daniel F. Selleck , By: Anita Y. Wolman, Attorney-in-Fact 2017-10-23