MILAN (Reuters) - Swiss asset manager Energy Infrastructure Partners (Eip) is one of the investors in talks with Eni to take a minority stake in Plenitude, the renewable energy and retail subsidiary.

Eni, which blocked Plenitude's IPO last year due to unfavorable market conditions, still aims to list the company, and the sale of a stake would give value to the asset, making the future IPO easier, sources note.

No comment from Eni and Eip.

Three sources had told Reuters last week that Eni was intensifying negotiations with some potential investors, without naming names.

Plenitude could be worth more than 6 billion euros as part of a private transaction, one of the sources said.

The oil major is aiming to divest between 5 and 15 percent of Plenitude, and the deal could be sealed even before August, the sources add.

A deal with Norway's HitecVision to acquire a minority stake in the Eni subsidiary had fallen through in February, the sources say.

(Francesca Landini, Italian version Giancarlo Navach, editing Francesca Piscioneri)