Company Update

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report:  February 15, 2018 INDEPENDENT BANK CORPORATION (Exact name of registrant as specified in its charter) Michigan 0-7818 38-2032782 (State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.) 4200 East Beltline Grand Rapids, Michigan      49525 (Address of principal executive office)   (Zip Code) Registrant's telephone number, including area code: (616) 527-5820 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☒ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company     ☐   If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐   Item 8.01 Other Events. Independent Bank Corporation (“IBCP”) , the parent company of Independent Bank, and TCSB Bancorp, Inc. (“TCSB”), the parent company of Traverse City State Bank, previously announced the signing of a definitive merger agreement on Dec. 4, 2017 for IBCP to acquire TCSB. On February 15, 2018, IBCP issued a press release announcing that t he proposed transaction has been approved by both the Federal Reserve Bank of Chicago and the Michigan Department of Insurance and Financial Services. The completion of the merger remains subject to the satisfaction of the other closing conditions contained in the Agreement and Plan of Merger dated December 4, 2017, between IBCP and TCSB, including the approval of TCSB shareholders. A copy of the press release is attached to this Current Report as Exhibit 99.1 and incorporated in this Item 8.01 by reference.   Item 9.01 Financial Statements and Exhibits     (d) Exhibits   Exhibit 99.1 Press Release issued by IBCP on February 15, 2018 SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.   INDEPENDENT BANK CORPORATION   (Registrant)     Date:  February 15, 2018 /s/ Robert N. Shuster   By: Robert N. Shuster   Its: Executive Vice President and Chief Financial Officer