(Adds Siemens, Syneos Health, Jingye Group, GKSD Investment; updates Aon)
March 9 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Monday:
** Siemens aims to keep a minority position in turbines maker Siemens Energy, which the German industrial conglomerate is spinning off later this year as it continues with a corporate restructuring, people close to the matter said.
** Syneos Health Inc, a U.S. contract research organization (CRO) that serves the pharmaceutical industry, is exploring a sale, people familiar with the matter said.
** Steelmaker Jingye Group completed its buyout of British Steel, the Chinese company said, reviving a business that was placed into compulsory liquidation last May.
** GKSD Investment Holding pulled out of preliminary stages of considering an offer for NMC Health, days after the UAE-based hospital operator was relegated from London's bluechip index.
** Aon Plc said it would buy Willis Towers Watson Plc for nearly $30 billion, in an all-stock deal which will make it the world's biggest insurance broker and give it more pricing power, but also attract regulatory scrutiny.
** Tesco plans to return $6.6 billion to shareholders after agreeing to sell its supermarket businesses in Thailand and Malaysia to Charoen Pokphand Group as part of plans to refocus on Britain.
** Brazilian energy company AES Tiete Energia SA will hire financial advisers to help it evaluate a merger proposal it received from Eneva SA, according to a securities filing.
** Spanish energy company Iberdrola has taken full ownership of French renewables developer Ailes Marines which is building an offshore wind farm in France, the company said.
** Australia's biggest private equity firm Pacific Equity Partners (PEP) plans to buy off-grid energy producer Zenith Energy Ltd for A$150.9 million ($99.59 million), sending shares in the target company soaring.
** Qatar Petroleum (QP) said it had signed an agreement with Yara international to acquire its 25% stake in Qatar Fertiliser Company (QAFCO) for $1 billion, according to statements by both companies.
** Cineworld said its biggest shareholder would sell almost a third of its stake in the British cinema operator to refinance a margin loan, after shares in the company sank to a 7-year low on bets audiences would collapse in the coronavirus crisis.
** Intesa Sanpaolo will not raise the value of its bid for smaller rival UBI Banca, the chief executive of Italy's top retail bank said. (Compiled by Arunima Kumar and Praveen Paramasivam in Bengaluru)