UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest

event reported) October 8, 2021

PacWest Bancorp

(Exact name of registrant as specified in its charter)

9701 Wilshire Blvd., Suite 700, Beverly Hills, California 90212

(Address of principal executive offices and zip code)

(310) 887-8500

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230-425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

On October 8, 2021, Pacific Western Bank (the “Bank”), a California state-chartered bank and the wholly-owned subsidiary of PacWest Bancorp (the “Company”), completed its previously announced acquisition (the “Acquisition”) of the Homeowners Association (“HOA”) Services Division of MUFG Union Bank, N.A. (“Union Bank”) pursuant to the terms of the Purchase and Assumption Agreement (the “Purchase Agreement”), dated March 31, 2021, between the Bank and Union Bank.

Under the terms of the Purchase Agreement, the Bank acquired certain assets and assumed certain liabilities related to Union Bank’s HOA Services Division for cash consideration of approximately $255 million, which represents the aggregate of a 5.9% deposit premium and the net book value of certain acquired assets and assumed liabilities. At closing, there were approximately $4.1 billion of deposits related to Union Bank’s HOA Services Division and approximately $6.4 million in related loans.

The foregoing description of the Acquisition does not purport to be complete and is qualified in its entirety by reference to the full text of the Purchase Agreement, a copy of which was filed as Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on April 1, 2021, and the full text of which is incorporated herein by reference. Except for its status as a contractual document that establishes and governs the legal relations between the parties with respect to the transactions described above, the Purchase Agreement is not intended to be a source of factual, business or operational information about the parties. Representations and warranties may be used as a tool to allocate risks between the parties to the Purchase Agreement, including where the parties do not have complete knowledge of all facts, instead of establishing these matters as facts. Furthermore, they may be subject to standards of materiality applicable to the contracting parties, which may differ from those applicable to investors. The assertions embodied in such representations and warranties are qualified by information contained in disclosure schedules that the parties exchanged in connection with signing the Purchase Agreement.

Accordingly, investors and security holders should not rely on such representations and warranties as characterizations of the actual state of facts or circumstances, because they were only made as of the date of the Purchase Agreement and are modified in important part by the underlying disclosure schedules in the Purchase Agreement. Moreover, information concerning the subject matter of such representations and warranties may change after the date of the Purchase Agreement, which subsequent information may or may not be fully reflected in the Company’s public disclosures.

Item 7.01 Regulation FD Disclosure

On October 12, 2021, the Company issued a press release announcing that the Bank had completed its acquisition of Union Bank’s HOA Services Division. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information contained in this Item 7.01, including the attached press release, are furnished pursuant to Item 7.01 of Form 8-K and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, is not subject to the liabilities of that section, nor shall the information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as may be expressly set forth by specific reference in such filing.

(d)  Exhibits

* Schedules and exhibits omitted pursuant to Item 601(b)(2) of Regulation S-K. The Company will furnish a copy of any omitted schedule or exhibit to the Securities and Exchange Commission upon request.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.