UPDATE 1-Goldman Sachs selling German Nordex stake -sources

* Stake likely to be sold to an investor -sources

* Official announcement to be made later in the day -sources

* Nordex shares up 2.3 pct (Adds background on Goldman stake, industry, trader quote)

FRANKFURT, Dec 14 (Reuters) - Goldman Sachs GS.N is selling its stake in German wind turbine maker Nordex NDXGk.DE, two people familiar with the matter told Reuters on Monday.

Goldman will sell almost all of its 14 percent stake except for a few shares, the sources said on Monday, adding that the package was likely to be sold to an investor.

They said the official announcement of the exit would be made later on Monday. Goldman and Nordex declined to comment.

Goldman’s stake -- which it holds directly and through Stichting, a related Dutch entity -- accounts for about 9.358 million shares, worth about 99 million euros ($145.2 million) based on the share price at 1006 GMT.

Goldman Sachs had taken a slightly bigger stake of 10.729 million shares as part of Nordex’s capital increase in 2005, but had started to sell off small bits over time.

Nordex has underperformed its main rivals -- such as Danish Vestas VWS.CO, the world's No.1, and India's Suzlon SUZL.BO -- gaining only 3.8 percent in 2009, while the FTSE clean tech index .FTET50 has soared 27 percent year-to-date.

The global economic crisis has not left the wind industry unscathed, curbing funding for wind parks on which the sector depends, while customers delay projects due to the lack of cash.

This has driven players to increase their market presence in the United States, which is set to benefit from large spending programmes on renewables, efforts that are currently in focus at the ongoing climate change summit in Copenhagen. [ID:nLL527527]

Nordex's biggest single shareholder is SKion, the investment vehicle of Susanne Klatten, who is also major shareholder in Altana ALTG.DE and BMW BMWG.DE. The sources said that Klatten would not buy additional shares in Nordex from Goldman.

"This (the news) is once again fuelling takeover speculation," said a Frankfurt-based trader, adding that General Electric GE.N has been mentioned as a company that could be possibly interested.

In October, a spokesman for the Klatten family had denied recurring takeover speculation, saying the family felt comfortable with its current stake of about 21.8 percent. [ID:nLQ110865] (Additional reporting by Jan Schwartz in Hamburg and Tyler Sitte in Frankfurt; Editing by Rupert Winchester) ($1=.6818 Euro)