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): May 29, 2013 (May 22, 2013)

PC CONNECTION, INC.

(Exact Name of Registrant as Specified in Charter)

Registrant’s telephone number, including area code: 603-683-2000

(Former Name or Former Address, if Changed Since Last Report)

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):

Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On May 22, 2013, PC Connection, Inc. (the “Company”) held its 2013 Annual Meeting of Stockholders (the “Annual Meeting”), at which a quorum was present in person or by proxy.

At the Annual Meeting, the Company’s stockholders approved an amendment to the Company’s Amended and Restated 2007 Stock Incentive Plan, as amended (the “2007 Plan”), which increased the number of shares of common stock that may be issued under the 2007 Plan from 1,200,000 to 1,400,000 shares, representing an increase of 200,000 shares. The amendment to the 2007 Plan had previously been adopted by the Company’s Board of Directors (the “Board”).

In addition, the Company’s stockholders also approved an amendment to the Company’s Executive Bonus Plan, as amended (the “Executive Bonus Plan”), to provide, among other things, for base-level bonuses as a percentage of base salary for the Company’s Chief Administrative Officer and Chief Financial Officer. The amendment to the Executive Bonus Plan had previously been adopted by the Board.

A summary of the 2007 Plan and Executive Bonus Plan’s terms, including a discussion of awards to our executive officers under the 2007 Plan, was provided in the definitive proxy statement filed by the Company with the Securities and Exchange Commission on April 9, 2013 under the headings “Proposal Four – Approval of Amendment to Amended and Restated 2007 Stock Incentive Plan, as amended” and “Proposal Five – Approval of Amendment to Executive Bonus Plan” and are incorporated herein by reference. A copy of the 2007 Plan and Executive Bonus Plan, including all amendments, are attached as Exhibits 99.1 and 99.2 to this Current Report on Form 8-K, respectively, and are incorporated herein by reference.

Item 5.07 Submission of Matters to a Vote of Security Holders.

The following is a brief description and vote count of all items voted on at the Annual Meeting:

The proposals were approved by the following votes:

Item 9.01. Financial Statements and Exhibits

SIGNATURE

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.

EXHIBIT INDEX