ISBC 2017 Form 10-K & 2018 Proxy Statement

Internet Availability of Proxy Materials We are relying upon a U.S. Securities and Exchange Commission rule that allows us to furnish proxy materials to stockholders over the Internet. As a result, beginning on or about April 12, 2018, we sent by mail a Notice Regarding the Availability of Proxy Materials containing instructions on how to access our proxy materials, including our Proxy Statement and Annual Report to Stockholders, over the Internet and how to vote. Internet availability of our proxy materials is designed to expedite receipt by stockholders and lower the cost and environmental impact of our Annual Meeting. However, if you received such a notice and would prefer to receive paper copies of our proxy materials, please follow the instructions included in the Notice Regarding the Availability of Proxy Materials. If you hold our common stock through more than one account, you may receive multiple copies of these proxy materials and will have to follow the instructions for each in order to vote all of your shares of our common stock. Our Proxy Statement and 2017 Annual Report to Stockholders are available at www.proxydocs.com/ISBC. PROXY STATEMENT