Tara M. Randall - 19 Dec 2025 Form 4 Insider Report for MERCANTILE BANK CORP (MBWM)

Role: EVP & Chief Experience Officer
Signature: /s/ Bradley J. Wyatt, Attorney-in-Fact
Issuer symbol: MBWM
Transactions as of: 19 Dec 2025
Net transactions value: -$74,175
Form type: 4
Filing time: 09 Feb 2026, 18:20:54 UTC
Previous filing: 10 Feb 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Randall Tara M	EVP & Chief Experience Officer	C/O MERCANTILE BANK CORPORATION, 310 LEONARD ST. NW, GRAND RAPIDS	/s/ Bradley J. Wyatt, Attorney-in-Fact	09 Feb 2026	0002050440

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MBWM	Common Stock	Tax liability	$74,175	-1,500	-9.8%	$49.45	13,848	19 Dec 2025	Direct	F1
transaction	MBWM	Common Stock	Award	$0	+1,820	+13%	$0.000000	15,668	05 Feb 2026	Direct	F2
transaction	MBWM	Common Stock	Award	$0	+910	+5.8%	$0.000000	16,578	05 Feb 2026	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes shares acquired since last report of common stock ownership by reinvesting cash dividends under the Issuer's dividend reinvestment plan.
F2	This award of shares is being made pursuant to the Issuer's performance-based restricted stock award agreement, such that a portion or all of this award of restricted stock may be forfeited in the future if certain performance metrics are not met.