Rush Enterprises Inc. Watch

from SC 13G/A 1 page Waddell & Reed Investment Management Company - Tax Id No. 48-1106973 Investment Advisor Registered Under Section 203 of the Investment Advisors Act of 1940 Ivy Investment Management Company - Tax Id No. 03-0481447 Investment Advisor Registered Under Section 203 of the Investment Advisors Act of 1940

from SC 13G 1 page Waddell & Reed Investment Management Company - Tax Id No. 48-1106973 Investment Advisor Registered Under Section 203 of the Investment Advisors Act of 1940 Ivy Investment Management Company - Tax Id No. 03-0481447 Investment Advisor Registered Under Section 203 of the Investment Advisors Act of 1940

from 8-K 5 pages Amendment #1 to Asset Purchase Agreement May 24, 2010

from 8-K 48 pages Asset Purchase Agreement

from 8-K 9 pages Second Amendment to the Asset Purchase Agreement

from 8-K 6 pages First Amendment to Asset Purchase Agreement

from 8-K 61 pages Asset Purchase Agreement Dated September 15, 2004 by and Among Rush Enterprises, Inc. Rush Truck Centers of Texas, L.P., Rush Truck Centers of Alabama, Inc., Rush Truck Centers of Tennessee, Inc., Rush Truck Centers of Indiana, Inc., Rush Administrative Services, Inc., and American Truck Source, Inc., American Truck Source Financial Corporation, Dallas Peterbilt, Ltd., L. L. P. Louisville Peterbilt, Inc., Nashville Peterbilt, Inc., Birmingham Peterbilt, Inc., American Truck Source Leasing, Inc. Highland Park Land Co., Inc. John D. Moore, Jesse T. Kirk and Milo Kirk

from 10-K405 ~50 pages Purchase Agreement - Pressley's

from 10-K405 ~50 pages Purchase Agreement - Calvert

from 10-K405 >50 pages Purchase Agreement - Kleester

from 8-K ~50 pages Asset Purchase Agreement

from 8-K ~50 pages Asset Purchase Agreement

from 8-K >50 pages Asset Purchase Agreement Dated 10/6/97