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): March 4, 2022

____________________

Mercantile Bank Corporation

(Exact name of registrant as specified in its charter)

Michigan	000-26719	38-3360865
(State or other jurisdiction	(Commission File	(IRS Employer
of incorporation)	Number)	Identification Number)

310 Leonard Street NW, Grand Rapids, Michigan	49504
(Address of principal executive offices)	(Zip Code)
Registrant's telephone number, including area code	616-406-3000

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))

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock	MBWM	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).    

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.          ☐

Item 5.02     Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Retirement of Executive Officer. On March 4, 2022, Lonna L. Wiersma, Senior Vice President and Human Resource Director of Mercantile Bank Corporation and its wholly-owned banking subsidiary, Mercantile Bank, retired. Mercantile is grateful to Ms. Wiersma for the 23 years of exemplary service she has rendered to the organization.

Brett Hoover, 51, will fill the role of Human Resource Director of Mercantile Bank. Mr. Hoover has been an employee of Mercantile Bank for over 15 years and executive management believes he is well suited for this new role.

Item 9.01     Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number                    Description

104                  Cover Page Interactive Data File (embedded within the Inline XBRL document)

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.

Mercantile Bank Corporation
By:	/s/ Charles E. Christmas
	Charles E. Christmas
	Executive Vice President, Chief
	Financial Officer and Treasurer

Date: March 4, 2022

2

Exhibit Index

Exhibit Number                    Description

104                  Cover Page Interactive Data File (embedded within the Inline XBRL document)