March 24 (Reuters) - OpenAI is close to securing about

$10 billion in fresh funding from investors, boosting its

valuation to $850 billion, including the money raised, a person

familiar with the matter said, confirming an earlier report in

Bloomberg News.

* Investors include Abu Dhabi's MGX, Coatue and Thrive

Capital, the person said. Altimeter Capital is also expected to

participate in the round, the person said.

* The deal is expected to be finalized by next week, the

person familiar with the matter said.

* The additional funds would bring the total raise from

OpenAI's latest funding round to about $120 billion,

underscoring strong investor demand for AI companies.

* The discussions are ongoing and the final size of the

investment could change.

* The ChatGPT maker said last month it was raising $110

billion from backers including Amazon.com ( AMZN ), Nvidia ( NVDA )

and SoftBank Group, as it ramps up spending on

computing infrastructure and talent.

* Coatue, MGX, Thrive and Altimeter did not immediately

respond to Reuters' requests for comment.