Deals of the day.-Mergers and acquisitions

Nov 28 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1430 GMT on Friday:

NatWest Group is in exclusive talks to sell its 85% stake in workplace pension provider Cushon to U.S. insurance broker Willis Towers Watson just two years after the British bank acquired the business, two people with knowledge of the matter said.

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Chinese sportswear firms Anta Sports Products <2020.HK> and Li Ning <2331.HK> are among those exploring a potential takeover of struggling German sportswear brand Puma , a source with knowledge of the matter said on Thursday.

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German stock exchange operator Deutsche Boerse AG said on Thursday it is in exclusive talks with Allfunds over an acquisition of the European fund trading platform.

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Piraeus Bank S.A. has completed its acquisition of all Ethniki Holdings S.à.r.l. shares for 600 million euros ($695.1 million) in cash, the bank announced on Thursday.'

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UniCredit bought a stake in Generali as a "financial investment" but it is also open to considering working together with Italy's biggest insurer, Chief Executive Andrea Orcel said.

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Naver Financial, a unit of South Korean internet giant Naver <035420.KS>, has agreed to acquire Dunamu, an operator of the country's largest cryptocurrency exchange Upbit, in an all-stock deal valued at 15.13 trillion won ($10.27 billion).

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