Steven Schweihofer - 31 Dec 2025 Form 4 Insider Report for MERCANTILE BANK CORP (MBWM)

Role: Director
Signature: /s/ Adin J. Tarr, attorney-in-fact
Issuer symbol: MBWM
Transactions as of: 31 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 05 Jan 2026, 17:57:34 UTC
Next filing: 07 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Schweihofer Steven	Director	C/O MERCANTILE BANK CORPORATION, 310 LEONARD ST. NW, GRAND RAPIDS	/s/ Adin J. Tarr, attorney-in-fact	05 Jan 2026	0002103619

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MBWM	Common Stock	Award		+5,282			5,282	31 Dec 2025	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Received in exchange for 7,423 shares of Eastern Michigan Financial Corporation Common Stock in connection with the merger of Eastern Michigan Financial Corporation and Mercantile Bank Corporation (the "Merger"). On the effective date of the Merger, each shareholder of Eastern Michigan Financial Corporation received $32.32 and 0.7116 shares of Mercantile Bank Corporation Common Stock in exchange for each share of Eastern Michigan Financial Corporation Common Stock. The last reportable closing price prior to the effective time of the Merger of Eastern Michigan Financial Corporation's Common Stock was $66.45 per share, and of Mercantile Bank Corporation's Common Stock was $48.10 per share.

Content

Received in exchange for 7,423 shares of Eastern Michigan Financial Corporation Common Stock in connection with the merger of Eastern Michigan Financial Corporation and Mercantile Bank Corporation (the "Merger"). On the effective date of the Merger, each shareholder of Eastern Michigan Financial Corporation received $32.32 and 0.7116 shares of Mercantile Bank Corporation Common Stock in exchange for each share of Eastern Michigan Financial Corporation Common Stock. The last reportable closing price prior to the effective time of the Merger of Eastern Michigan Financial Corporation's Common Stock was $66.45 per share, and of Mercantile Bank Corporation's Common Stock was $48.10 per share.