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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K/A

CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the
Securities Exchange Act of 1934
Date of Report (date of earliest event reported): April 15, 2026

(Exact name of registrant as specified in its charter)

Customers Bancorp, Inc.

Pennsylvania | 001-35542 | 27-2290659
(State or other jurisdiction of incorporation) | (Commission File number) | (IRS Employer Identification No.)

701 Reading Avenue
West Reading PA 19611
(Address of principal executive offices, including zip code)
(610) 933-2000
(Registrant’s telephone number, including area code)
N/A
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions (see General Instructions 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))

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

Title of each class |  | Trading Symbols |  | Name of each exchange on which registered
Voting Common Stock, par value $1.00 per share |  | CUBI |  | New York Stock Exchange
5.375% Subordinated Notes due 2034 |  | CUBB |  | New York Stock Exchange

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. ☐

Explanatory Note
This Amendment to Current Report on Form 8-K/A (this "Amended Form 8-K") is being filed solely to amend Item 9.01 of the Form 8-K filed on April 15, 2026 ("Original Form 8-K"), in order to replace the letter that was furnished as Exhibit 99.1 to the Original Filing with a corrected letter. Such corrected letter is furnished as Exhibit 99.1 to this Amended Form 8-K, which replaces the Exhibit 99.1 attached to the Original Form 8-K in its entirety. No other changes were made to the Original Form 8-K other than to replace Exhibit 99.1. All other Items of the Original Form 8-K are unaffected by this Amended Form 8-K and such Items have not been included herein.
++++++++++++++++++++++++++++++
Item 9.01 Financial Statements and Exhibits.
(d) Exhibits.

Exhibit |  | Description
Exhibit 99.1 |  | 2026 Annual Shareholder Letter, as corrected

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.

| CUSTOMERS BANCORP, INC.
| By: /s/ Andrew B. Sachs
| Name: Andrew B. Sachs
| Title: Executive Vice President - General Counsel and Corporate Secretary

Date: April 16, 2026

EXHIBIT INDEX

Exhibit |  | Description
Exhibit 99.1 |  | 2026 Annual Shareholder Letter, as corrected