Dec 4 (Reuters) - The following bids, mergers, acquisitions and...

Dec 4 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1230 GMT on Monday:

** Aspen Pharmacare APNJ.J is expanding further into China through a deal to buy the Chinese business of Swiss group Sandoz SDZ.S for up to 92.6 million euros ($100.6 million), the South African company said.

** Japan's Cosmo Energy 5021.T said it took a positive view on a stake purchase by gas company Iwatani Corp 8088.T .

** Roche ROG.S agreed to take over obesity drug developer Carmot Therapeutics CRMO.O for $2.7 billion, joining a list global contestants seeking to challenge the dominant makers of weight-loss drugs Novo Nordisk and Eli Lilly.

** Brookfield will walk away from Origin Energy (ORG) , a source familiar with the matter said, after shareholders in Australia's largest power retailer rejected a $10.6 billion takeover bid by a consortium led by the asset manager.

** Alaska Air Group Inc ALK.N said it would acquire Hawaiian Holdings Inc HA.O for $1.9 billion, including debt, placing a bet on a troubled airline with lucrative routes as U.S. antitrust regulators fight consolidation in the sector.