# EDGAR Filing Document

**Accession Number:** 0001028918
**File Stem:** 0001193125-25-202315
**Filing Date:** 2025-9
**Character Count:** 3116
**Document Hash:** 786c8e39ddbd0ed4dc29b4963428591c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-202315.hdr.sgml**: 20250912

**ACCESSION NUMBER**: 0001193125-25-202315

**CONFORMED SUBMISSION TYPE**: 15-12G

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250912

**DATE AS OF CHANGE**: 20250912

**EFFECTIVENESS DATE**: 20250912

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PACIFIC PREMIER BANCORP INC
- **CENTRAL INDEX KEY:** 0001028918
- **STANDARD INDUSTRIAL CLASSIFICATION:** STATE COMMERCIAL BANKS [6022]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 330743196
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 15-12G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-22193
- **FILM NUMBER:** 251312177

**BUSINESS ADDRESS:**
- **STREET 1:** 17901 VON KARMAN AVE
- **STREET 2:** SUITE 1200
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92614
- **BUSINESS PHONE:** 949-864-8000

**MAIL ADDRESS:**
- **STREET 1:** 17901 VON KARMAN AVE
- **STREET 2:** SUITE 1200
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92614

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**WASHINGTON, D.C. 20549** 

**FORM 15** 

**CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION** 

**UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934** 

**OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d)** 

**OF THE SECURITIES EXCHANGE ACT OF 1934** 

**Commission File Number: 000-22193** 

## PACIFIC PREMIER BANCORP, INC.
**(Exact name of registrant as specified in its charter)** 

**c/o Columbia Banking System, Inc.** 

**1301 A Street** 

**Tacoma, Washington 98402-4200** 

**(253) 305-1900** 

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

**Common Stock, par value $0.01 per share** 

**(Title of each class of securities covered by this Form)** 

**None** 

**(Titles of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains)** 

Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports:

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| | |
|:---|:---|
|  Rule 12g-4(a)(1) | ☒ |
|  Rule 12g-4(a)(2) | ☐ |
|  Rule 12h-3(b)(1)(i) | ☒ |
|  Rule 12h-3(b)(1)(ii) | ☐ |
|  Rule 15d-6 | ☐ |
|  Rule 15d-22(b) | ☐ |

---

Approximate number of holders of record as of the certification or notice date:

Common Stock, par value $0.01 per share: 0

Pursuant to the requirements of the Securities Exchange Act of 1934, Columbia Banking System, Inc., as successor by merger to Pacific Premier Bancorp, Inc., has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person.

---

| | | |
|:---|:---|:---|
| Date: September 12, 2025 | **COLUMBIA BANKING SYSTEM, INC.** | **COLUMBIA BANKING SYSTEM, INC.** |
|  | (as successor by merger to Pacific Premier Bancorp, Inc.) | (as successor by merger to Pacific Premier Bancorp, Inc.) |
|  | By: | /s/ Kumi Yamamoto Baruffi |
|  |  | Name: Kumi Yamamoto Baruffi |
|  |  | Title: EVP, General Counsel and Corporate Secretary |

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