ISABELLA BANK CORP

Public companies file this within four business days when something important happens that investors should know about before the next quarterly report.

ISABELLA BANK CORP filed this to release information to investors under Regulation FD — usually a press release, conference presentation, or other event the company considers important. 1 For Immediate Release Isabella Bank Corporation 401 N. Pleasant, MI 48858-1649 FOR MORE INFORMATION CONTACT: Jerome Schwind, Chief Executive Officer Jerry Ritzert, Chief Financial Officer Lori Peterson, Vice President and Director of Marketing Phone: 989-772-9471 Isabella Bank Corporation to Acquire Grand River Commerce, Inc.