SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of earliest event reported: June 21, 2013

ICG Group, Inc.

(Exact name of registrant as specified in charter)

(610) 727-6900

(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:

Fourth Amended and Restated 2005 Omnibus Equity Compensation Plan

On April 12, 2013, ICG Group, Inc’s (“ICG’s”) Board of Directors adopted, subject to stockholder approval at ICG’s 2013 Annual Meeting of Stockholders (the “Annual Meeting”), an amendment and restatement of ICG’s Third Amended and Restated 2005 Omnibus Equity Plan (the “Plan” and, as amended and restated, the “Amended Plan”). On June 21, 2013, a requisite number of ICG stockholders approved the Amended Plan, which became effective on that date.

The Amended Plan (1) increased the number of authorized shares of ICG Common Stock issuable under the Plan by 2,000,000 (for a total of 9,600,000 authorized shares), (2) added annual recurring revenue and annual contract value (ACV) as criteria that may be used for objective performance goals under the Plan, (3) extended the date on which the Plan expires to ten years following the effective date of the Amended Plan (i.e., to June 21, 2023) and (d) enabled the Plan to continue to meet certain requirements for tax purposes

The foregoing description of the Amended Plan does not purport to be complete and is qualified in its entirety by reference to the actual text of the Amended Plan. A copy of the Amended Plan is attached hereto as Exhibit 10.1 and is incorporated by reference herein.

On June 21, 2013, ICG held its Annual Meeting. As of April 25, 2013, the record date for the Annual Meeting, there were a total of 37,490,433 shares of ICG Common Stock issued and outstanding and entitled to vote at the Annual Meeting. At the Annual Meeting, 34,269,908 shares of ICG Common Stock were represented in person or by proxy and, accordingly, a quorum was present.

The following is a brief description of each matter voted upon at the Annual Meeting, as well as the final number of votes cast for, cast against and withheld, as applicable, for each such matter, as well as the number of abstentions and broker non-votes with respect to each such matter.

1. ICG’s stockholders re-elected each of Thomas A. Decker, Thomas P. Gerrity and Peter K. Miller as a Class II director, for a term of three years or until his successor has been elected and qualified. The tabulation of votes on the matter was as follows:

2. ICG’s stockholders ratified the appointment of KPMG LLP as ICG’s independent registered public accountant for the year ending December 31, 2013. The tabulation of votes on the matter was as follows:

2

3. ICG’s stockholders approved an amendment and restatement of the Plan (i.e., the Amended Plan) to (a) increase the number of authorized shares of ICG Common Stock issuable under the Plan by 2,000,000 (for a total of 9,600,000 authorized shares), (b) add annual recurring revenue and ACV as criteria that may be used for objective performance goals under the Plan, (c) extend the date on which the Plan expires to ten years following the effective date of the Amended Plan (i.e., to June 21, 2023) and (d) enable the Plan to continue to meet certain requirements for tax purposes. The tabulation of votes on the matter was as follows:

4. ICG’s stockholders voted in favor of approving, on an advisory basis, the compensation of ICG’s named executive officers, as disclosed in ICG’s proxy statement for the Annual Meeting. The tabulation of votes on the matter was as follows:

(d) Exhibits

The following exhibit is filed herewith:

3

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, thereunto duly authorized.

4

EXHIBIT INDEX