IMPORTANT INFORMATION FOR INVESTORS AND SHAREHOLDERSThis communication does not constitute an offer to buy or solicitation of an offer to sell any securities. In response to the tender offer for the shares of the Company commenced by IEP Vehicles Sub LLC and Icahn Enterprises Holdings L.P., the Company has filed a solicitation/recommendation statement on Schedule 14D-9 with the U.S. Securities and Exchange Commission (“SEC”). INVESTORS AND SHAREHOLDERS OF OSHKOSH ARE URGED TO READ THE SOLICITATION/RECOMMENDATION STATEMENT AND OTHER DOCUMENTS FILED WITH THE SEC CAREFULLY IN THEIR ENTIRETY BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Investors and shareholders may obtain a copy of these documents free of charge at the SEC’s website at www.sec.gov. These materials are also available without charge on the Company’s website at www.oshkoshcorporation.com. In addition, copies of these materials may be requested from the Company’s information agent, Innisfree M&A Incorporated, toll-free at (877) 750-9499. ADDITIONAL INFORMATION AND WHERE TO FIND IT The Company, its directors and certain of its executive officers and employees may be deemed to be participants in the solicitation of proxies from shareholders in connection with the Company’s 2013 Annual Meeting of Shareholders (the “2013 Annual Meeting”). The Company plans to file a proxy statement with the SEC in connection with the solicitation of proxies for the 2013 Annual Meeting (the “2013 Proxy Statement”). SHAREHOLDERS ARE URGED TO READ THE 2013 PROXY STATEMENT (INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) AND ANY OTHER RELEVANT DOCUMENTS THAT THE COMPANY WILL FILE WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Additional information regarding the identity of these potential participants, none of whom owns in excess of 1 percent of the Company’s common stock, and their direct or indirect interests, by security holdings or otherwise, will be set forth in the 2013 Proxy Statement and other materials to be filed with the SEC in connection with the 2013 Annual Meeting. This information can also be found in the Company’s Annual Report on Form 10-K for the year ended September 30, 2011, filed with the SEC on November 16, 2011, and in the Company’s definitive proxy statement for its 2012 Annual Meeting of Shareholders (the “2012 Proxy Statement”), filed with the SEC on December 12, 2011. To the extent holdings of the Company’s securities have changed since the amounts printed in the 2012 Proxy Statement, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC.