Jan 30 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1415 GMT on Tuesday:
** U.S. private equity firm Blackstone (NYSE:BX) Group LP BX.N is in advanced talks to buy an approximate 55 percent stake in the Financial and Risk business of Thomson Reuters Corp TRI.N TRI.TO , a deal that would value the unit at about $20 billion including debt, three sources familiar with the matter said. Ride-hailing firm Uber said it would sell vehicles and the existing lease portfolio of its auto-leasing business Xchange Leasing to startup digital car marketplace Fair. Amazon.com Inc AMZN.O , Berkshire Hathaway (NYSE:BRKa) BRKa.N and JPMorgan Chase & Co (NYSE:JPM) JPM.N are forming a venture aimed at lowering healthcare costs for their U.S. employees, they said, sparking a slide in the shares of a host of healthcare-related companies. Dalian Wanda Group's commercial property arm has snagged a $5.4 billion investment from a group led by tech giant Tencent Holdings 0700.HK , one of the Chinese conglomerate's biggest deals aimed at easing financial strains and streamlining operations. Brazilian pulpmakers Eldorado Brasil Celulose SA and Fibria Celulose SA FIBR3.SA may form a joint venture to combine operations at Três Lagoas, in the state of Mato Grosso do Sul, Valor Econômico reported without naming sources. French trade unions expressed their opposition to last year's agreed tie-up between Alstom ALSO.PA and Siemens SIEGn.DE , saying they feared possible job cuts. Poland's JSW JSW.WA , which is the European Union's biggest coking coal producer, has placed a conditional bid to buy a mining services company Przedsiebiorstwo Budowy Szybów (PBSz), JSW said. Britain's Informa sealed its 3.8 billion pound ($5.3 billion)takeover of conference organiser UBM UBM.L , creating an enlarged business information and events firm. Varian Medical Systems (NYSE:VAR) VAR.N said it has struck a deal to acquire Australia's Sirtex Medical Ltd SRX.AX for about $1.3 billion, expanding its portfolio of cancer care products. German business software group SAP SE SAPG.DE said its unit SAP America Inc will buy cloud-based human resources software company Callidus Software Inc CALD.O for a total enterprise value of $2.4 billion. Fiat Chrysler Automobiles NV FCHA.MI will provide Waymo with thousands of Pacifica hybrid minivans as Alphabet Inc's GOOGL.O self-driving unit begins rolling out its first public ride-hailing service later this year, the companies said. Telecom Italia TLIT.MI has drawn up plans to put its network into a separate company fully owned by the group, a source familiar with the matter said, seeking to address calls for it to loosen its grip over a key industry asset. Emirates NBD ENBD.DU , Dubai's largest bank, said it had started initial strategic discussions with Russia's Sberbank SBER.MM about a possible purchase of Sberbank's stake in Turkey's Denizbank DENIZ.IS . The Bank of Slovenia said it could revoke its permission for Serbia's AIK bank AIKB.BEL to acquire a majority stake in Slovenia's Gorenjska Banka GBKR.LJ .