X0306 4 2020-02-28 0 0001102112 PACWEST BANCORP PACW 0001220969 PIECZYNSKI JAMES 9701 WILSHIRE BOULEVARD, SUITE 700 BEVERLY HILLS CA 90212 1 1 0 0 Executive Vice President Common Stock 2020-02-28 4 F 0 2930 31.64 D 43231 D Common Stock 2020-02-28 4 F 0 7924 31.64 D 35307 D Common Stock 153978 I By Pieczynski Living Trust Represents the number of shares of Issuer's common stock that Reporting Person surrendered to Issuer for the satisfaction of Reporting Person's tax withholding obligations upon the vesting of 9,043 shares of restricted stock on February 28, 2020. Reflects market closing price on February 28, 2020. On February 15, 2017, Reporting Person was granted performance restricted stock units ("PRSUs"). Vesting of the PRSUs was conditioned upon the achievement of certain performance goals and an employment condition. On February 12, 2020, actual performance against goals for the applicable performance period was determined and the Reporting Person was awarded 18,423 shares of Issuer's common stock to vest on February 28, 2020 subject to the Reporting Person's satisfaction of the employment condition. The amount reported in column 4 represents the number of shares of Issuer's common stock that Reporting Person surrendered to Issuer for the satisfaction of Reporting Person's tax withholding obligations upon the vesting of the 18,423 shares of Issuer's common stock on February 28, 2020. The Reporting Person and his spouse serve as the trustees for the trust. /s/ James Pieczynski 2020-03-03