An investment company is defined as a firm that uses its capitals in order to invest in other companies.

There are two major types of investment companies – open-end or mutual funds and the closed-end.

List of investment companies of world

A.B. Watley Group Inc.

Affiliated Managers Group, Inc.

Allied Capital Corporation

Berkeley Technology, Limited (ADR)

Calamos Asset Management, Inc

Castle Holding Corp.

Citigroup Capital XIV

CME Group Inc.

Cypress Sharpridge Investments, Inc.

Diamond Hill Investment Group, Inc.

Evercore Partners Inc.

FBR Capital Markets Corporation

First Albany Companies Inc.

Franklin Resources, Inc.

Gamco Investors Inc.

Goldman Sachs Group, Inc.

Gundaker/Jordan American Holdings, Inc.

Hudson Holding Corp.

International Securities Exchange Hldgs

Investment Technology Group

JMP Group Inc.

Kirlin Holding Corp.

Invesco PLC (ADR)

Knobias, Inc.

Lehman Brothers Holdings Inc.

MCG Capital Corporation

Merrill Lynch & Co., Inc.

Morgan Stanley

Nasdaq Stock Market, Inc.

NYSE Euronext

Och-Ziff Capital Management Group LLC

Ryan Beck Holdings, Inc.

Sagient Research Systems, Inc.

SEI Investments Company

Sovereign Exploration Associates Int Inc

Stifel Financial Corp.

TD Ameritrade Holding Corp.

The Blackstone Group L.P.

Thomas Weisel Partners Group, Inc.

U.S. Global Investors, Inc.

United States Natural Gas Fund, LP

Van der Moolen Holdings N.V. (ADR)

Vie Financial Group, Inc.

Winmill & Co. Incorporated