425

Filed by Kemper Corporation

(SEC File No. 001-18298) pursuant to Rule 425

under the Securities Act of 1933, as amended,

and deemed filed pursuant to

Rule 14a-12 under the

Securities Exchange Act of 1934, as amended

Subject Company: Infinity Property and Casualty Corporation

(SEC File No. 000-50167)

On February 13, 2018, Kemper Corporation (the “Company”) issued the following communication related to the proposed business combination of the Company and Infinity Property and Casualty Corporation announced on February 13, 2018.

To: All Kemper Associates

From: Joe Lacher

Subject: Important Message Regarding Today’s Exciting News

Date: 2/13/18

I’m pleased to share some very exciting news. Moments ago, we announced that we plan to acquire Infinity Property and Casualty Corporation in a transaction that will expand and enhance our presence and ability to serve policyholders in nonstandard auto insurance (NSA). You can read the press release we issued announcing the transaction here. I’d like to take a moment to walk you through some of the key points from today’s announcement.

First and foremost, you have all played a key role in making this transaction possible. Thanks to your numerous contributions every day to act like an owner and better serve our stakeholders, we have strengthened our company, enhanced value for our policyholders, and retained and attracted exceptional talent. These positive developments have transformed Kemper and make us a compelling partner for Infinity.

As many of you know, Infinity is a national provider of auto insurance specializing in NSA. Our organizations have similar, customer-centric cultures focused on providing quality insurance products that address the needs of our customers. Bringing our two companies together will combine our respected brands and raise our profile in NSA.

We believe our diversified business portfolio of life, health and P&C business are competitive advantages, and this is a major step towards progress in our growth phase. We’re excited about and committed to growth opportunities in all our businesses to enhance our strategic position, and I know there will be more strong steps in our future.

As a combined company, we will be able to leverage operational strengths, platforms and marketing insights of both of our companies to accelerate growth. We will also expand our customer reach through deeper agency relationships and offer a more diversified suite of product offerings across auto, homeowner, life and health insurance with greater efficiencies.

While we are thrilled about the opportunities this transaction presents, it is important to remember that today’s announcement is just the first step in the process. The transaction is subject to the approval of Infinity and Kemper shareholders and other applicable closing conditions, including regulatory review. We hope to close the transaction in the third quarter of 2018, and will then begin the process for a smooth combination. For now, Kemper and Infinity will continue to operate as separate companies, and as such, we must remain sharply focused on executing our strategy and delivering on our commitments to our policyholders.


We will keep you informed throughout the process as we transition into a combined organization. Information and FAQs will be posted on MyKemper, as well as key updates and major milestones as they develop.

I am excited by the opportunity to build on all that we have accomplished at Kemper, and welcome Infinity to our family as we work toward our goal of enhancing our position as a best-in-class insurance company.

Sincerely,

 

LOGO

Joe Lacher

President and CEO

Cautionary Statements Regarding Forward-Looking Information

This communication may contain or incorporate by reference statements or information that are, include or are based on forward-looking statements within the meaning of the safe-harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements give expectations, intentions, beliefs or forecasts of future events or otherwise for the future, and can be identified by the fact that they relate to future actions, performance or results rather than relating strictly to historical or current facts. Words such as “believe(s),” “goal(s),” “target(s),” “estimate(s),” “anticipate(s),” “forecast(s),” “project(s),” “plan(s),” “intend(s),” “expect(s),” “might,” “may,” “could” and variations of such words and other words and expressions of similar meaning are intended to identify such forward-looking statements. However, the absence of such words or other words and expressions of similar meaning does not mean that a statement is not forward-looking.

Any or all forward-looking statements may turn out to be wrong, and, accordingly, readers are cautioned not to place undue reliance on such statements. Forward-looking statements involve a number of risks and uncertainties that are difficult to predict, and are not guarantees or assurances of future performance. No assurances can be given that the results and financial condition contemplated in any forward-looking statements will be achieved or will be achieved in any particular timetable. Forward-looking statements involve a number of risks and uncertainties that are difficult to predict, and can be affected by inaccurate assumptions or by known or unknown risks and uncertainties that may be important in determining actual future results and financial condition. The general factors that could cause actual results and financial condition to differ materially from those expressed or implied include, without limitation, the following: (a) the satisfaction or waiver of the conditions precedent to the consummation of the proposed merger transaction involving Kemper Corporation (the “Company”), a wholly-owned subsidiary of the Company and Infinity Property and Casualty Corporation (“Infinity”), including, without limitation, the receipt of stockholder and regulatory approvals (including approvals, authorizations and clearance by antitrust authorities and insurance regulators necessary to complete such proposed merger transaction) on the terms desired or anticipated (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 such proposed merger transaction) ; (b) unanticipated difficulties or expenditures relating to such proposed merger transaction; (c) risks relating to the value of the shares of the Company’s common stock to be issued in such proposed merger transaction; (d) disruptions of the Company’s and Infinity’s current plans, operations and relationships with third persons caused by the announcement and pendency of such proposed merger transaction, including, without limitation, the ability of the combined company to hire and retain any personnel; (e) legal proceedings that may be


instituted against the Company and Infinity following announcement of such proposed merger transaction; and (f) those factors listed in annual, quarterly and periodic reports filed by the Company and Infinity with the Securities and Exchange Commission (the “SEC”), whether or not related to such proposed merger transaction.

The Company assumes no, and expressly disclaims any, duty or obligation to update or correct any forward-looking statement as a result of events, changes, effects, states of facts, conditions, circumstances, occurrences or developments subsequent to the date of this communication or otherwise, except as required by law. Readers are advised, however, to consult any further disclosures the Company makes on related subjects in its filings with the SEC.

Additional Information Regarding the Transaction and Where to Find It

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. This communication is being made in respect of the proposed merger transaction involving the Company, a wholly-owned subsidiary of the Company and Infinity, among other things. The proposed issuance of shares of Company common stock in connection with the proposed merger transaction will be submitted to the stockholders of the Company for their consideration, and the proposed merger transaction will be submitted to the shareholders of Infinity for their consideration. In connection therewith, the parties intend to file relevant materials with the SEC, including a definitive joint proxy statement/prospectus, which will be mailed to the stockholders of the Company and the shareholders of Infinity. However, such documents are not currently available. BEFORE MAKING ANY VOTING OR ANY INVESTMENT DECISION, INVESTORS AND SECURITYHOLDERS OF THE COMPANY AND/OR INFINITY ARE URGED TO READ THE DEFINITIVE JOINT PROXY STATEMENT/PROSPECTUS REGARDING THE PROPOSED MERGER TRANSACTION AND ANY OTHER RELEVANT DOCUMENTS FILED OR TO BE FILED WITH THE SEC CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED MERGER TRANSACTION. Investors and security holders may obtain free copies of the definitive joint proxy statement/prospectus, any amendments or supplements thereto and other documents containing important information about each of the Company and Infinity, once such documents are filed with the SEC, through the website maintained by the SEC at www.sec.gov. Copies of the documents filed with the SEC by the Company will be available free of charge under the “Investors” section of the Company’s website located at http://www.kemper.com or by contacting the Company’s Investor Relations Department at (312) 661-4930 or investors@kemper.com. Copies of the documents filed with the SEC by Infinity will be available free of charge under the “Investor Relations” section of Infinity’s website located at http://www.infinityauto.com or by contacting Infinity’s Investor Relations Department at (205) 803-8186 or investor.relations@infinityauto.com

Participants in the Solicitation

The Company and Infinity, and their respective directors and executive officers, certain other members of their respective management and certain of their respective employees, may be deemed to be participants in the solicitation of proxies in connection with the proposed merger transaction. Information about the directors and executive officers of the Company is set forth in its proxy statement for its 2017 annual meeting of stockholders, which was filed with the SEC on March 24, 2017, its annual report on Form 10-K for the fiscal year ended December 31, 2017, which was filed with the SEC on February 13, 2018, and information about the directors and executive officers of Infinity is set forth in its proxy statement for its 2017 annual meeting of shareholders, which was filed with the SEC on April 11,


2017, and its annual report on Form 10-K for the fiscal year ended December 31, 2016, which was filed with the SEC on February 28, 2017, each of which can be obtained free of charge from the sources indicated above. 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 definitive joint proxy statement/prospectus and other relevant materials to be filed with the SEC when they become available.