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

Date of Report (Date of earliest event reported): March 9, 2015

Rush Enterprises, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (830) 626-5200

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):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

(e)     On March 9, 2015, the Board of Directors of Rush Enterprises, Inc. (the “Company”), upon the recommendation of the Compensation Committee of the Company (the “Compensation Committee”), approved the following compensation payments to the below named executive officers (as defined in the Company’s Proxy Statement for the Annual Meeting of Stockholders held on May 20, 2014) of the Company:

Cash Bonus Payments

After a review of competitive market data and the Company’s operating results for the 2014 fiscal year, the Compensation Committee approved the following cash bonus payments:

The cash bonuses will be paid on March 13, 2015.

Stock Option Grants

The Compensation Committee approved the following stock options exercisable for shares of the Company’s Class A common stock (the “Stock Options”):

The Stock Options will be granted under the Rush Enterprises, Inc. Amended and Restated 2007 Long-Term Incentive Plan (the “Plan”) on March 13, 2015 (the “Grant Date”). The Stock Options will have an exercise price equal to the closing sale price of the Company’s Class A common stock on the Grant Date and will vest in three equal annual installments beginning on the third anniversary of the Grant Date. Additional terms and conditions applicable to the Stock Options are set forth in the Form of Rush Enterprises, Inc. 2007 Long-Term Incentive Plan Stock Option Agreement attached as Exhibit 4.4 to the Company’s Form S-8 filed with the Securities Exchange Commission on July 24, 2007.

Restricted Stock Unit Awards

The Compensation Committee approved the following restricted stock unit awards (the “RSU Awards”):

The RSU Awards will be granted under the Plan on the Grant Date. The RSU Awards entitle the grantee to receive shares of the Company’s Class B common stock upon satisfaction of the vesting conditions. The RSU Awards will vest in three equal installments beginning on the first anniversary of the Grant Date. Additional terms and conditions applicable to the RSU Awards are set forth in the Form of Rush Enterprises, Inc. 2007 Long-Term Incentive Plan Restricted Stock Unit Agreement, attached as Exhibit 10.1 to the Company’s Form 8-K filed with the Securities Exchange Commission on March 14, 2012.

SIGNATURES

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

Dated: March 13, 2015