After the registration statement is declared effective, Banc of California and PacWest will mail a definitive joint proxy statement/prospectus to their respective stockholders that, as of the applicable record date, are entitled to vote on the matters being considered at the Banc of California stockholder meeting and at the PacWest stockholder meeting, as applicable. Banc of California or PacWest may also file other documents with the SEC regarding the proposed transaction. BEFORE MAKING ANY VOTING OR INVESTMENT DECISION, INVESTORS AND SECURITY HOLDERS ARE URGED TO CAREFULLY READ THE ENTIRE REGISTRATION STATEMENT AND PRELIMINARY JOINT PROXY STATEMENT/PROSPECTUS (INCLUDING ALL AMENDMENTS AND SUPPLEMENTS THERETO), AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AND THE DEFINITIVE VERSIONS THEREOF (WHEN THEY BECOME AVAILABLE), AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO SUCH DOCUMENTS, CAREFULLY AND IN THEIR ENTIRETY BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION.