On January 23, 2013, the Company posted on its website a letter to its stockholders discussing its results of operations for the quarterly period and year ended December 31, 2012. Additionally, on January 23, 2013, the Company posted on its website schedules providing quarterly financial information and operating statistics by segment for the three year period ended December 31, 2012. A copy of the letter and the quarterly segment schedules are attached to this Current Report as Exhibit 99.1, Exhibit 99.2, Exhibit 99.3 and Exhibit 99.4 and are incorporated herein by reference.

The information in this Current Report is being furnished, not filed, under Item 2.02 in this Current Report on form 8-K.

(d) Exhibits.

Exhibit
Number          Description

Exhibit 99.1    Letter to stockholders dated January 23, 2013, issued by Swift
                Transportation Company

Exhibit 99.2    Quarterly financial information by segment for the three year
                period ended December 31, 2012 (Unaudited)

Exhibit 99.3    Quarterly operating statistics by segment for the three year period
                ended December 31, 2012 (Unaudited)

Exhibit 99.4    Quarterly adjusted operating income and operating ratio
                reconciliation to comparable GAAP measures by segment for the three
                year period ended December 31, 2012 (Unaudited)