March 13 (Reuters) - The following bids, mergers,

acquisitions and disposals were reported by 0930 GMT on

Wednesday:

** Singapore Telecommunications (SingTel) is

looking to sell a significant stake in its wholly owned

Australian unit Optus to Canadian private equity giant

Brookfield, a source with direct knowledge of the

matter said.

** Denmark's Orsted said it has agreed to sell

stakes in four U.S. onshore wind farms with a total capacity of

957 megawatt to investment group Stonepeak for around $300

million.

** Australia's PSC Insurance said it is in talks

regarding a possible buyout after being approached by multiple

parties, confirming a local media report.

** Steelmaker ArcelorMittal said on Tuesday it will

acquire a 28.4% stake in Vallourec for around 955

million euros ($1.04 billion) to increase its exposure in the

tubular business.

(Compiled by Rajarshi and Pratik Jain in Bengaluru)