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): September 18, 2013

ViaSat, Inc.

(Exact Name of Registrant as Specified in its Charter)

6155 El Camino Real

Carlsbad, California 92009

(Address of Principal Executive Offices, Including Zip Code)

(760) 476-2200

(Registrant’s Telephone Number, Including Area Code)

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:

At the annual meeting of stockholders of ViaSat, Inc. (“ViaSat”) held on September 18, 2013, ViaSat’s stockholders approved an amendment to the ViaSat, Inc. Employee Stock Purchase Plan (as amended, the “Purchase Plan”). The amendment to the Purchase Plan was previously approved by the Board of Directors of ViaSat, and implemented the following changes: (1) the maximum number of shares of common stock that may be issued under the Purchase Plan was increased by 300,000 shares to a total of 2,550,000 shares; and (2) the amended Purchase Plan will have two components in order to give ViaSat increased flexibility in the granting of purchase rights under the Purchase Plan to U.S. and to non-U.S. employees. Specifically, the amended Purchase Plan authorizes the grant of purchase rights that are intended to qualify for favorable U.S. federal tax treatment (the “Section 423 Component”) under Section 423 of the U.S. Internal Revenue Code of 1986, as amended (the “Code”). To facilitate participation for employees located outside of the United States in light of non-U.S. law and other considerations, the amended Purchase Plan also provides for the grant of purchase rights that are not intended to be tax-qualified under Code Section 423 (the “Non-Section 423 Component”). The plan administrator will designate offerings made under the Non-Section 423 Component and, except as otherwise noted below, the Section 423 Component and the Non-Section 423 Component generally will be operated and administered in the same way. The amendment to the Purchase Plan became effective upon stockholder approval at the annual meeting.

The preceding description of the Purchase Plan does not purport to be complete and is qualified in its entirety by reference to the complete text of the Purchase Plan, which is filed as Exhibit 10.1 to this report and incorporated herein by reference.

At the annual meeting of stockholders of ViaSat, Inc. held on September 18, 2013, ViaSat’s stockholders voted on the following four proposals and cast their votes as follows:

Proposal 1: To elect Robert Bowman, B. Allen Lay and Dr. Jeffrey Nash to serve as Class II Directors.

Proposal 2: To ratify the appointment of PricewaterhouseCoopers LLP as ViaSat’s independent registered public accounting firm for the fiscal year ending April 4, 2014.

Proposal 3: To conduct an advisory vote on executive compensation.

Proposal 4: To approve an amendment to the Employee Stock Purchase Plan (described above).

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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.

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