On March 6, 2017, Pacific Premier Bancorp, Inc. (the “Company” or “Pacific Premier”) (NASDAQ: PPBI), the holding company of Pacific Premier Bank, issued a press release announcing that Steven R. Gardner, Chairman, President and Chief Executive Officer, will participate in the Raymond James 38^th>Annual Institutional Investors Conference on March 7, 2017 in Orlando. On the same day, Ronald J. Nicolas Jr., Senior Executive Vice President and Chief Financial Officer, will participate in the Sandler O’Neill West Coast Financial Services Conference in San Diego. At both conferences, the executives from Pacific Premier Bancorp will hold a series of meetings with institutional investors. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K.

The Company is filing an investor presentation relating to its fourth quarter of 2016 (the “Presentation”), which will be used by Messrs. Gardner and Nicolas for presentations to investors and others. The Presentation replaces and supersedes investor presentation materials previously furnished as an exhibit to the Company’s Current Reports on Form 8-K.

A copy of the Presentation is attached hereto as Exhibit 99.2 and incorporated herein by reference. The Presentation is also available on the Company’s web site at www.ppbi.com.

Information contained herein, including Exhibits 99.1 and 99.2, shall not be deemed filed for the purposes of the Securities Exchange Act of 1934, as amended, nor shall such information and Exhibits be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.

ITEM 8.01. OTHER EVENTS

The only information contained in this Form 8-K being filed for the purposes of Rule 425 under the Securities Act is the information relating solely to the proposed merger between the Company and Heritages Oaks Bancorp contained in the press release and presentation furnished herewith as Exhibit 99.1 and Exhibit 99.2, respectively, and being filed under this Item 8.01.

ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS

99.1 Press Release, dated March 6, 2017

99.2 Pacific Premier Bancorp, Inc., Investor Presentation, Fourth>Quarter 2016

About PACIFIC PREMIER BANCORP, INC. (NASDAQ:PPBI)

Pacific Premier Bancorp, Inc. is a bank holding company. The Company’s subsidiary, Pacific Premier Bank (the Bank), is a California state-chartered commercial bank. The Bank’s primary focus market is small and middle market businesses. The Bank offers various deposit products and services, including checking, money market and savings accounts, cash management services, electronic banking services and online bill payment. The Bank also offers a range of loan products, such as commercial business loans, lines of credit, small business administration (SBA) loans, warehouse credit facilities, commercial real estate (CRE) loans, residential home loans, construction loans and consumer loans. The Bank primarily conducts business throughout California through a network of approximately 60 full-service depository branches. Through the United States Small Business Administration (SBA) lending unit, the Bank provides entrepreneurs and small business owners’ access to loans.

PACIFIC PREMIER BANCORP, INC. (NASDAQ:PPBI) Recent Trading Information

PACIFIC PREMIER BANCORP, INC. (NASDAQ:PPBI) closed its last trading session down -0.15 at 40.25 with 116,346 shares trading hands.