Mercer Bancorp Inc Com Watch

from 8-K 35 pages Up to 1,236,250 Shares (Subject to Increase Up to 1,421,688 in Shares the Event of an Increase in the Pro Forma Market Value of the Company’s Common Stock) Mercer Bancorp, Inc. (A Maryland Corporation) Common Stock (Par Value $0.01 Per Share) Agency Agreement May 15, 2023

from S-1/A 35 pages Up to 1,236,250 Shares (Subject to Increase Up to 1,421,688 in Shares the Event of an Increase in the Pro Forma Market Value of the Company’s Common Stock) Mercer Bancorp, Inc. (A Maryland Corporation) Common Stock (Par Value $0.01 Per Share) Agency Agreement [•]

from S-1 6 pages We Understand That the Board of Directors of Mercer Savings Bank (The “Bank”) Is Considering the Adoption of a Plan of Conversion (The “Plan”) Pursuant to Which the Bank Will Convert to Stock Form and in Connection Therewith (A) Reorganize Into the Holding Company Form (The “Conversion”) and (B) Issue Shares (The “Shares”) of Common Stock (The “Common Stock”) of a To-Be-Organized Stock Holding Company (The “Holding Company”) to Be Offered and Sold in a Public Offering. the Holding Company and the Bank Are Sometimes Collectively Referred to Herein as the “Company” and Their Respective Boards of Directors Are Sometimes Collectively Referred to as the “Boards.” Performance Trust Capital Partners, LLC (“Performance Trust”) Is Pleased to Assist the Company on a Best Efforts Basis With the Offering (As Defined Below), and This Letter (The “Agreement”) Shall Confirm the Terms and Conditions of Our Engagement as Records Agent and Stock Information Center Manager to the Company

from S-1 8 pages We Understand That the Board of Directors of Mercer Savings Bank (The “Bank”) Is Considering the Adoption of a Plan of Conversion (The “Plan”) Pursuant to Which the Bank Will Convert to Stock Form and in Connection Therewith (A) Reorganize Into the Holding Company Form (The “Conversion”) and (B) Issue Shares (The “Shares”) of Common Stock (The “Common Stock”) of a To-Be-Organized Stock Holding Company (The “Holding Company”) to Be Offered and Sold in a Public Offering. the Holding Company and the Bank Are Sometimes Collectively Referred to Herein as the “Company” and Their Respective Boards of Directors Are Sometimes Collectively Referred to as the “Boards.” Performance Trust Capital Partners, LLC (“Performance Trust”) Is Pleased to Assist the Company on a Best Efforts Basis With the Offering (As Defined Below), and This Letter (The “Agreement”) Shall Confirm the Terms and Conditions of Our Engagement as Exclusive Marketing Agent to the Company