UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

Current report pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

May 6, 2011

Date of Report (Date of earliest event reported)

Kansas City Southern

(Exact Name of Registrant as Specified in Its Charter)

427 West 12^th Street

Kansas City, Missouri 64105

(816) 983-1303

(Address, Including Zip Code, and Telephone Number, Including Area Code,

of Registrant’s Principal Executive Offices)

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):

Placement Agreement

On May 6, 2011, Kansas City Southern de Mexico, S.A. de C.V. (“KCSM”), a wholly-owned subsidiary of Kansas City Southern (the “Company”), entered into a placement agreement (the “Placement Agreement”) with Merrill Lynch, Pierce, Fenner & Smith Incorporated, J.P. Morgan Securities LLC, Scotia Capital (USA) Inc., Banco Bilbao Vizcaya Argenteria, S.A. and Morgan Stanley & Co. Incorporated (collectively, the “Placement Agents”), to sell to the placement agents $200.0 million aggregate principal amount of new senior unsecured notes in a private placement in reliance on Section 4(2) of the Securities Act of 1933, as amended (the “Securities Act”). Under the Placement Agreement, the Notes are expected to be resold by the Placement Agents to qualified institutional buyers pursuant to Rule 144A under the Securities Act or to non-U.S. persons pursuant to Regulation S under the Securities Act.

The above description of the Placement Agreement is qualified in its entirety by reference to the terms of that agreement attached as Exhibit 10.1 to this Current Report.

On May 6, 2011, the Company issued a news release announcing the pricing by KCSM of $200 million in aggregate principal amount of 6 1/8% Senior Notes due 2021 (the “Notes”), issued pursuant to the Placement Agreement. A copy of the news release is attached as Exhibit 99.1 to this Current Report. KCSM expects to close on the sale of the Notes on May 20, 1011. This announcement is not an offer to sell the Notes.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report on Form 8-K to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT INDEX