Editor's Note: Related Tickers: ExOne Co (NASDAQ:XONE), 3D Systems Corporation (NYSE:DDD), Stratasys, Ltd. (NASDAQ:SSYS), Staples, Inc. (NASDAQ:SPLS).

An analyst upgrade can sometimes be highly useful in allowing you to learn about a new company that might have flown under-the-radar.

Editor's Note: Related tickers: 3D Systems Corporation (NYSE:DDD), Stratasys, Ltd. (NASDAQ:SSYS), Hewlett-Packard Company (NYSE:HPQ), Autodesk, Inc. (NASDAQ:ADSK), Exa Corp (NASDAQ:EXA), Staples, Inc. (NASDAQ:SPLS), LinkedIn Corp ...

3D Systems Corp. (DDD), a maker of three-dimensional printers, fell the most in 2 1/2 months after announcing the sale of about $250 million of its stock, plus an additional 1.3 million shares by company officers and directors.

Like other products advertised on the company's website, 3D says it can print the figures for customers itself, as "unique 5.5" figurines ... printed in full-color on 3D Systems' Projet(R) 660Pro, with a ceramic-like feel." In this scenario, the ...

Among the companies with shares actively trading in Monday's session are Theravance Inc. (THRX), 3D Systems Corp. (DDD) and Post Holdings Inc. (POST).

Optimism surrounds 3D Systems 3D Systems (DDD), as it gets ready to report its first quarter results on Tuesday, April 30, 2013.

3D Systems Corporation (NYSE:DDD) shares fell 4.36% to $45.59. The company on May 9 announced the pricing of an underwritten public offering of 7,500,000 shares of its common stock at a price of $40.00 per share.

Is 3D Systems Corporation (NYSE:DDD) going to take off soon? Money managers are getting more optimistic. The number of bullish hedge fund positions advanced by 1 lately.

ROCK HILL, South Carolina, May 9, 2013 - 3D Systems (NYSE:DDD) announced today the pricing of an underwritten public offering of 7,500,000 shares of its common stock at a price of $40.00 per share.