ISBC 2017 Form 10-K & 2018 Proxy Statement

4 Security Ownership of Certain Beneficial Owners and Management Persons and groups who beneficially own in excess of five percent of Investors Bancorp’s common stock are required to file certain reports with the Securities and Exchange Commission (“SEC”) regarding such beneficial ownership. The following table sets forth, as of March 26, 2018, certain information as to the shares of Investors Bancorp common stock owned by persons who beneficially own more than five percent of Investors Bancorp’s issued and outstanding shares of common stock. We know of no persons, except as listed below, who beneficially owned more than five percent of the outstanding shares of Investors Bancorp common stock as of March 26, 2018. For purposes of the following table and the table included under the heading “Directors and Executive Officers,” and in accordance with Rule 13d-3 under the Securities Exchange Act of 1934, as amended, a person is deemed to be the beneficial owner of any shares of common stock (i) over which he or she has, or shares, directly or indirectly, voting or investment power, or (ii) as to which he or she has the right to acquire beneficial ownership at any time within 60 days after March 26, 2018. Principal Stockholders Name and Address of Beneficial Owner Number of Shares Owned and Nature of Beneficial Ownership Percent of Shares of Common Stock Outstanding (1) Blue Harbour Group, LP 646 Steamboat Road Greenwich, CT 06830 29,582,428 (2) 9.78% The Vanguard Group 100 Vanguard Blvd. Malvern, PA 19355 21,754,028 (3) 7.19% Fuller & Thaler Asset Management, Inc. 411 Borel Avenue, Suite 300 San Mateo, CA 94402 21,630,726 (4) 7.15% BlackRock, Inc. 55 East 52nd Street New York, NY 10055 17,719,175 (5) 5.86% State Street Corporation One Lincoln Street Boston, MA 02111 16,170,639 (6) 5.35% Investors Bank Employee Stock Ownership Plan Trust Trustee: First Bankers Trust Services, Inc. 2321 Kochs Lane Quincy, IL 62305 16,134,329 (7) 5.34% (1) Based on 302,363,636 shares of Investors Bancorp common stock outstanding as of March 26, 2018. (2) Based on a Form 13F filed with the SEC on February 14, 2018. (3) Based on a Schedule 13G/A filed with the SEC on February 9, 2018. (4) Based on a Schedule 13G/A filed with the SEC on February 13, 2018. (5) Based on a Schedule 13G/A filed with the SEC on January 25, 2018. (6) Based on a Schedule 13G filed with the SEC on February 14, 2018. (7) Based on a Schedule 13G/A filed with the SEC on February 5, 2018. PROXY STATEMENT