As filed with the Securities and Exchange Commission on July 1, 2013

Registration No. 333-            

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

ICG GROUP, INC.

(Exact name of registrant as specified in its charter)

555 East Lancaster Avenue

Suite 640

Radnor, PA 19087

(Address of Principal Executive Offices) (Zip Code)

ICG GROUP, INC. 2005 OMNIBUS EQUITY COMPENSATION PLAN

(Full title of the plan)

Suzanne L. Niemeyer, Esq.

Managing Director, General Counsel & Secretary

ICG Group, Inc.

555 East Lancaster Avenue

Suite 640

Radnor, PA 19087

(Name and address of agent for service)

(610) 727-6900

(Telephone number, including area code, of agent for service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

CALCULATION OF REGISTRATION FEE

EXPLANATORY NOTE

Pursuant to General Instruction E of Form S-8, this registration statement on Form S-8 (this “Registration Statement”) is being filed in order to register an additional 2,000,000 shares of the Registrant’s Common Stock, which are securities of the same class and relate to the same employee benefit plan, the ICG Group, Inc. 2005 Omnibus Equity Compensation Plan, as amended and restated, as those shares registered on the Registrant’s registration statements on (1) Form S-8 filed with the Securities and Exchange Commission on July 22, 2005, File No. 333-126808, and (2) Form S-8 filed with the Securities and Exchange Commission on June 26, 2009, File No. 333-160252, each of which is hereby incorporated by reference.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

2

SIGNATURES

Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Radnor, Commonwealth of Pennsylvania, on July 1, 2013.

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS:

Each of the undersigned officers and directors of ICG Group, Inc., a Delaware corporation, hereby constitutes and appoints Walter W. Buckley, III and R. Kirk Morgan, and each of them acting alone, his true and lawful attorney-in-fact, with full power of substitution, to execute and cause to be filed with the Securities and Exchange Commission pursuant to the requirements of the Securities Act, any and all amendments and post-effective amendments to this Registration Statement with exhibits thereto and other documents in connection therewith, and hereby ratifies and confirms all that said attorney-in-fact or his substitute or substitutes may do or cause to be done by virtue hereof. This Power of Attorney may be signed in several counterparts.

Pursuant to the requirements of the Securities Act, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

EXHIBIT INDEX