X0306 4 2018-02-27 0 0001137547 UNITED SECURITY BANCSHARES UBFO 0001697577 MACKOVAK BENJAMIN 2126 INYO STREET FRESNO CA 93721 1 0 0 0 Common Stock 2018-02-27 4 A 0 1000.00 0.00 A 1000 D Common Stock 2018-02-27 4 J 0 0.00 0.0 A 916289 I By: Strategic Value Investors LP Restricted Stock Units 0.00 2018-02-27 4 A 0 1000. A 2018-02-27 2028-02-27 Common Stock 1000 16000 D Restricted Stock Units 10.40 2018-02-27 4 M 0 1000 D 2018-02-27 2028-02-27 Common Stock 1000 15000 D Represents common stock issued pursuant to the vesting and settlement of 100% of the restricted stock units that were granted on February 27, 2018. Represents a grant of 1,000 restricted stock units on February 27, 2018, in consideration for service as a member of the Company's Board of Directors. 100% of the restricted stock units were vested on the grant date. Represents the complete vesting of all restricted stock units granted on February 27, 2018. 916,289 shares owned directly by Strategic Value Investors LP. Mr. Mackovak, solely by virtue of his position as a managing member of Strategic Value Bank Partners LLC, which serves as the general partner of Strategic Value Investors LP, may be deemed to beneficially own the shares owned directly by Strategic Value Investors LP for purposes of Section 16. Mr. Mackovak expressly disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein. No transactions in the issuer's equity securities occurred. Information is included to show indirect beneficial ownership of the issuer's equity securities. /s/ BENJAMIN MACKOVAK 2018-03-01