Dec 19 (Reuters) - The following bids, mergers, acquisitions...

Dec 19 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1030 GMT, on Tuesday:

** Abu Dhabi satellite operator Yahsat YAHSAT.AD and geographic data and analytics provider Bayanat BAYANAT.AD have agreed an all-share merger to create the region's first AI-powered space technology company, they said on Monday.

** Cevian Capital has taken a 1.3% stake in UBS UBSG.S , worth around 1.2 billion euros ($1.31 billion), the activist investor group said.

** Investors in Australian lithium producer Allkem (AKE) voted to accept a $10.6 billion merger offer from U.S. giant Livent LTHM.N that would create one of the world's biggest lithium companies.

** Sony Group Corp's 6758.T Indian unit said that it has not yet agreed to prolong a merger deadline with India's Zee Entertainment Enterprises ZEE.NS , days after the latter sought an extension.

** Chile's SQM SQMA.SN has teamed up with Australia's richest person, Gina Rinehart, to make a sweetened A$1.7 billion ($1.14 billion) bid for Australian lithium developer Azure Minerals (AZS) , the three parties said.

** Mexico's Grupo Carso reached an agreement to indirectly purchase for $530 million a 50% stake in the offshore, shallow water Ichalkil and Pokoch oil fields, according to a company filing published on Monday.

** Nippon Steel 5401.T shares sank more than 5% early after it clinched a deal to buy U.S. Steel X.N for $14.9 billion in cash.