UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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): June 18, 2018

Central Index Key Number of the issuing entity: 0001698685

BANK 2017-BNK4

(Exact name of Issuing Entity)

Central Index Key Number of the depositor: 0000850779

Wells Fargo Commercial Mortgage Securities, Inc.

(Exact Name of Registrant as Specified in its Charter)

Central Index Key Number of the sponsor: 0001102113

Bank of America, National Association

Central Index Key Number of the sponsor: 0001541557

Morgan Stanley Mortgage Capital Holdings LLC

Central Index Key Number of the sponsor: 0000740906

Wells Fargo Bank, National Association

(Exact Names of the Sponsors as Specified in their Charters)

Registrant’s telephone number, including area code  (704) 374-6161          

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any following provisions:

[ ]  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))

Section 8.  Other Events.

Item 8.01.  Other Events.

On June 18, 2018, an agreement (“Amendment No.1 to Pooling and Servicing Agreement” or the “Amendment”) was entered into by and between Wells Fargo Commercial Mortgage Securities, Inc., as depositor, Wells Fargo Bank, National Association, as master servicer Rialto Capital Advisors, LLC, as special servicer, Wells Fargo Bank, National Association, as certificate administrator, Wilmington Trust, National Association, as trustee, and Pentalpha Surveillance LLC, as operating advisor and as asset representations reviewer, amending the Pooling and Servicing Agreement (the “Pooling and Servicing Agreement”) previously filed as Exhibit 4.1 to Form 8-K/A dated and filed on April 19, 2017 with respect to BANK 2017-BNK4. The purpose of the Amendment was to provide for a legal fee reserve account that was established in connection with the BANK 2017-BNK4 transaction. Capitalized terms not defined herein have the meanings set forth in the Pooling and Servicing Agreement.

Section 9.  Financial Statements and Exhibits.

SIGNATURES

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.

Exhibit Index