Page 1 of 8 Frequently Asked Questions | TCF & Huntington Merger MERGER DETAILS Q: Why is this merger taking place? A:

Page 2 of 8 Q: Why now, we just completed our system conversion in August? A: Q: Will the TCF name change? A: Q: Is this an expense management initiative? A: Q: Where will the headquarters be located? A: Q: Will Huntington maintain a strong presence in Detroit? A:

Page 3 of 8 Q: What about our presence in Minneapolis and Denver? A: Q: Both companies have a presence in Chicago; what is the impact to that market? A: Q: What will our combined footprint be? A: Q: What does this do for our ability to invest in innovation, and enhanced digital-and- mobile channels? A: Q: TCF has a lot of philanthropic commitments in our local communities; what will happen to those? A:

Page 4 of 8 Q: What are the next steps of this merger? A: Q: What should we tell our customers about this transaction? A: BANKING CENTERS Q: Will Huntington be closing any TCF banking centers? A:

Page 5 of 8 Q: Will our current banking center hours change? A: EMPLOYMENT Q: What does this announcement mean for team members? A: Q: Are we able to post to Huntington’s current job openings? A: Q: What happens if my position is eliminated as a result of the merger? Will I receive a severance package? A: CULTURE Q: Tell me about Huntington’s culture. A: looking out for people   

Page 6 of 8 Q: What is Huntington’s philanthropic philosophy? A: ADDITIONAL QUESTIONS Q: Who can answer my additional questions about this merger? A: CAUTION REGARDING FORWARD-LOOKING STATEMENTS This communication may contain certain forward-looking statements, including, but not limited to, certain plans, expectations, goals, projections, and statements about the benefits of the proposed transaction, the plans, objectives, expectations and intentions of Huntington and TCF, the expected timing of completion of the transaction, and other statements that are not historical facts. Such statements are subject to numerous assumptions, risks, and uncertainties. Statements that do not describe historical or current facts, including statements about beliefs and expectations, are forward-looking statements. Forward-looking statements may be identified by words such as expect, anticipate, believe, intend, estimate, plan, target, goal, or similar expressions, or future or conditional verbs such as will, may, might, should, would, could, or similar variations. The forward-looking statements are intended to be subject to the safe harbor provided by Section 27A

Page 7 of 8 of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934, and the Private Securities Litigation Reform Act of 1995. While there is no assurance that any list of risks and uncertainties or risk factors is complete, below are certain factors which could cause actual results to differ materially from those contained or implied in the forward-looking statements: changes in general economic, political, or industry conditions; the magnitude and duration of the COVID-19 pandemic and its impact on the global economy and financial market conditions and our business, results of operations, and financial condition; uncertainty in U.S. fiscal and monetary policy, including the interest rate policies of the Federal Reserve Board; volatility and disruptions in global capital and credit markets; movements in interest rates; reform of LIBOR; competitive pressures on product pricing and services; success, impact, and timing of our business strategies, including market acceptance of any new products or services including those implementing our “Fair Play” banking philosophy; the nature, extent, timing, and results of governmental actions, examinations, reviews, reforms, regulations, and interpretations, including those related to the Dodd-Frank Wall Street Reform and Consumer Protection Act and the Basel III regulatory capital reforms, as well as those involving the OCC, Federal Reserve, FDIC, and CFPB; the occurrence of any event, change or other circumstances that could give rise to the right of one or both of the parties to terminate the merger agreement between Huntington and TCF; the outcome of any legal proceedings that may be instituted against Huntington or TCF; delays in completing the transaction; the failure to obtain necessary regulatory approvals (and the risk that such approvals may result in the imposition of conditions that could adversely affect the combined company or the expected benefits of the transaction); the failure to obtain shareholder approvals or to satisfy any of the other conditions to the transaction on a timely basis or at all; the possibility that the anticipated benefits of the transaction are not realized when expected or at all, including as a result of the impact of, or problems arising from, the integration of the two companies or as a result of the strength of the economy and competitive factors in the areas where Huntington and TCF do business; the possibility that the transaction may be more expensive to complete than anticipated, including as a result of unexpected factors or events; diversion of management’s attention from ongoing business operations and opportunities; potential adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the transaction; the ability to complete the transaction and integration of Huntington and TCF successfully; the dilution caused by Huntington’s issuance of additional shares of its capital stock in connection with the transaction; and other factors that may affect the future results of Huntington and TCF. Additional factors that could cause results to differ materially from those described above can be found in Huntington’s Annual Report on Form 10-K for the year ended December 31, 2019 and in its subsequent Quarterly Reports on Form 10-Q, including for the quarter ended September 30, 2020, each of which is on file with the Securities and Exchange Commission (the “SEC”) and available in the “Investor Relations” section of Huntington’s website, http://www.huntington.com, under the heading “Publications and Filings” and in other documents Huntington files with the SEC, and in TCF’s Annual Report on Form 10-K for the year ended December 31, 2019 and in its subsequent Quarterly Reports on Form 10-Q, including for the quarter ended September 30, 2020, each of which is on file with the SEC and available on TCF’s investor relations website, ir.tcfbank.com, under the heading “Financial Information” and in other documents TCF files with the SEC. All forward-looking statements speak only as of the date they are made and are based on information available at that time. Neither Huntington nor TCF assumes any obligation to update

Page 8 of 8 forward-looking statements to reflect circumstances or events that occur after the date the forward- looking statements were made or to reflect the occurrence of unanticipated events except as required by federal securities laws. As forward-looking statements involve significant risks and uncertainties, caution should be exercised against placing undue reliance on such statements. IMPORTANT ADDITIONAL INFORMATION In connection with the proposed transaction, Huntington will file with the SEC a Registration Statement on Form S-4 that will include a Joint Proxy Statement of Huntington and TCF and a Prospectus of Huntington, as well as other relevant documents concerning the proposed transaction. The proposed transaction involving Huntington and TCF will be submitted to TCF’s shareholders and Huntington’s shareholders for their consideration. This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. INVESTORS AND SHAREHOLDERS OF HUNTINGTON AND SHAREHOLDERS OF TCF ARE URGED TO READ THE REGISTRATION STATEMENT AND THE JOINT PROXY STATEMENT/PROSPECTUS REGARDING THE TRANSACTION WHEN IT BECOMES AVAILABLE AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Shareholders will be able to obtain a free copy of the definitive joint proxy statement/prospectus, as well as other filings containing information about Huntington and TCF, without charge, at the SEC’s website (http://www.sec.gov). Copies of the joint proxy statement/prospectus and the filings with the SEC that will be incorporated by reference in the joint proxy statement/prospectus can also be obtained, without charge, by directing a request to Huntington Investor Relations, Huntington Bancshares Incorporated, Huntington Center, HC0935, 41 South High Street, Columbus, Ohio 43287, (800) 576-5007 or to TCF Investor Relations, TCF Financial Corporation, 333 W. Fort Street, Suite 1800, Detroit, Michigan 48226, (866) 258-1807. PARTICIPANTS IN THE SOLICITATION Huntington, TCF, and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the shareholders of Huntington and TCF in connection with the proposed transaction under the rules of the SEC. Information regarding Huntington’s directors and executive officers is available in its definitive proxy statement relating to its 2020 Annual Meeting of Shareholders, which was filed with the SEC on March 12, 2020, and other documents filed by Huntington with the SEC. Information regarding TCF’s directors and executive officers is available in its definitive proxy statement relating to its 2020 Annual Meeting of Shareholders, which was filed with the SEC on March 25, 2020, and other documents filed by TCF with the SEC. Other information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the joint proxy statement/prospectus and other relevant materials filed with the SEC. Free copies of this document may be obtained as described in the preceding paragraph.