McCarter & English, LLP Four Gateway Center 100 Mulberry Street Newark, NJ 07102-4056 T. 973.622.4444 F. 973.624.7070 www.mccarter.com BOSTON HARTFORD STAMFORD NEW YORK NEWARK EAST BRUNSWICK PHILADELPHIA WILMINGTON WASHINGTON, DC | Ladies and Gentlemen: We have acted as counsel to Investors Bancorp, Inc., a Delaware corporation (“Investors Bancorp”), in connection with the proposed merger (the “Merger”) of Gold Coast Bancorp, Inc., a New York corporation (“Gold Coast Bancorp”), with and into Investors Bancorp, with Investors Bancorp as the surviving entity, as contemplated by the Agreement and Plan of Merger dated as of July 24, 2019, by and between Investors Bancorp and Gold Coast Bancorp (the “Merger Agreement”). This opinion is being delivered in connection with the Registration Statement on Form S-4 (File No. 333-234274) initially filed with the Securities and Exchange Commission on October 21, 2019, including the proxy statement/prospectus forming a part thereof (the “Initial Registration Statement”), and the Pre-Effective Amendment No. 1 to the Initial Registration Statement (“Amendment No. 1” and, collectively with the Initial Registration Statement, the “Registration Statement”) to be filed with the Securities and Exchange Commission on the date hereof, relating to the transactions contemplated by the Merger Agreement. Unless otherwise defined herein, capitalized terms used in this opinion have the meanings ascribed to them in the Merger Agreement. In rendering our opinion, we have examined and, with your consent, are expressly relying upon (without any independent investigation or review thereof) the truth and accuracy of the factual statements, representations, covenants and warranties contained in (i) the Merger Agreement (including any exhibits and schedules thereto), (ii) the Registration Statement, (iii) the respective tax representation letters of Investors Bancorp and Gold Coast Bancorp, each dated on or about the date hereof and delivered to us for purposes of this opinion (the “Representation Letters”), and (iv) such other documents and corporate records as we have deemed necessary or appropriate for purposes of our opinion. In addition, we have assumed, with your consent, that: 1. Original documents (including signatures) are authentic, and documents submitted to us as copies conform to the original documents, and there has been (or will be by the Effective Time) execution and delivery of all documents where execution and delivery are prerequisites to the respective obligations of the parties to the Merger Agreement to consummate the Merger; |