X0306 4 2023-03-15 0001012019 RUSH ENTERPRISES INC \TX\ RUSHA 0001392503 Keller Steven L 555 IH 35 SOUTH, SUITE 500 NEW BRAUNFELS TX 78130 1 CFO & Treasurer Class B Common Stock 2023-03-15 4 F 0 1868 55.55 D 128223.89580 D Class B Common Stock 2023-03-15 4 F 0 2117 55.55 D 126106.89580 D Class B Common Stock 2023-03-15 4 A 0 22000 0 A 148106.89580 D Class A Common Stock 55130.3698 D Option (right to buy) 52.56 2023-03-15 4 A 0 10000 0 A 2033-03-15 Class A Common Stock 10000 10000 D Shares reported are shares not reported to the reporting person in order to satisfy the reporting person's tax obligations with respect to vesting associated with the grant of restricted stock that occurred on March 15, 2021. Includes unvested restricted stock and certain shares included in the Company's deferred compensation plan. Shares reported are shares not reported to the reporting person in order to satisfy the reporting person's tax obligations with respect to vesting associated with the grant of restricted stock that occurred on March 15, 2022. Reflects the grant of restricted stock. The restricted stock vests in increments of 1/3 on each of the first, second and third anniversary of the grant date, which is March 15, 2023. Includes 259.21 shares acquired on July 1, 2022, and 211.61 shares acquired o January 1, 2023, under the Rush Enterprises, Inc. Employee Stock Purchase Plan. Includes certain shares included in the Company's deferred compensation plan. Options may be exercised in increments of 1/3 on each anniversary of the grant date beginning on the third anniversary of the grant date. The grant date is ten years prior to the expiration date. /s/ Steven L. Keller 2023-03-17