Filed Pursuant to Rule 424(b)(3) File Number 333-67896 PROSPECTUS SUPPLEMENT NO. 2 $517,500,000 XO Communications Inc. 5.75% Convertible Subordinated Notes due 2009 And Class A Common Stock Issuable Upon Conversion of the Convertible Notes This prospectus supplement supplements the prospectus dated August 30, 2001 of XO Communications Inc., (as supplemented prior to the date hereof, the "prospectus"), relating to the sale by certain of our securityholders (including their pledgees, donees, assignees, transferees, successors and others who later hold any of our securityholders' interests) of up to $517,500,000 aggregate principal amount at maturity of Convertible Notes and the common shares issuable upon conversion of the Convertible Notes. You should read this prospectus supplement in conjunction with the prospectus. This prospectus supplement is qualified in its entirety by reference to the prospectus, except to the extent that the information in this prospectus supplement supersedes the information contained in the prospectus. Capitalized terms used in this prospectus supplement and not otherwise defined herein have the meanings specified in the prospectus. The table of selling securityholders contained on page 56 of the prospectus is hereby amended to add the entities who are named below as selling securityholders. Number of Shares of Class A Common Principal Amount Stock Issuable of Convertible upon Conversion of Beneficially the Convertible Name Owned and Offered Notes(1) - ---- ----------------- ------------------- Solomon Brothers Asset Management Inc. 125,400,000 4,909,410 Deutsche Banc Alex Brown Inc. 37,200,000 1,456,320 Morgan Stanley & Co. 10,000,000 391,484 The Class I C Company 2,000,000 78,297 Credit Suisse First Boston Corp. 1,100,000 43,063 Enterprise High Yield Bond Fund 950,000 37,191 Enterprise Accumulation Trust High Yield 750,000 29,361 Columbia/HCA 700,000 27,404 Golden Rule Insurance Co. - High Yield 350,000 13,702 Grange Mutual Casualty Co. 300,000 11,745 Caywood Capital Fund, L.P. 200,000 7,830 Goldman Sachs and Company 200,000 7,830 City Public Service of San Antonio Texas Employees' Pension Trust 150,000 5,872 Schejola Partners L.P. 125,000 4,894 Trimtab Investments, L.P. 100,000 3,915 Rose Hills Endowment Care Fund 100,000 3,915 Triad Guaranty Insurance Corp. 100,000 3,915 Triad Guaranty Inc. 50,000 1,957 Montebello Community Health Services, Inc. 50,000 1,957 Enterprise International Group of Funds High-Yield Bond Portfolio 50,000 1,957 Bohnett Family Charitable Remainder Trust 25,000 979 Long Island Trust 25,000 979 Laura McDonald 25,000 979 * Additional principal amount and shares only; does not include principal amount or shares already listed in the Prospectus. (1) Calculated assuming only the conversion of all of the holder's Convertible Notes at a conversion rate of 39.1484 shares of Class A Common Stock per $1,000 principal amount at maturity of the Convertible Notes. This conversion rate is subject to adjustment, however, as described under "Description of the Convertible Notes--Conversion Rights." As a result, the number of shares of Class A Common Stock issuable upon conversion of the Convertible Notes may increase or decrease in the future. The number in this column does not include Class A Common Stock otherwise held by each such holder. The information contained in this prospectus supplement regarding the selling securityholders has been prepared from information given to us by those selling securityholders on or prior to the date of this prospectus supplement. Investing in the Convertible Notes involves risks that are described in the "Risk Factors" section beginning on page 4 of the prospectus. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if the prospectus or this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense. The date of this prospectus supplement is November 14, 2001.