Mergers and acquisitions

The following bids, mergers, acquisitions and disposals were reported by 1330 GMT on Thursday: ** British medical device maker Niox Group NIOX.L said buyout firm Keensight Capital had sweetened its proposal to buy the company to 81 pence per share, or 322.4 million pounds ($417.48 million). ** Kraken said it would buy retail futures trading platform NinjaTrader for $1.5 billion, in a deal that would allow one of the world's largest cryptocurrency exchanges to expand into multiple asset classes and grow its user base. ** Beacon Roofing Supply BECN.O has agreed to an $11 billion buyout offer from billionaire Brad Jacobs' firm QXO QXO.N , weeks after it rejected an earlier proposal and strived to avoid a hostile takeover attempt. ** French banking group Credit Mutuel Alliance Federale is buying German lender Oldenburgische Landesbank (OLB), a surprise move after the northern German bank for years considered a listing on the stock exchange.** Targo Deutschland, the German subsidiary of France's Crédit Mutuel Alliance Fédérale, will buy the German lender Oldenburgische Landesbank (OLB), the two companies said .** Japanese technology investor SoftBank Group 9984.T is accelerating its move into chip technology companies with the $6.5 billion purchase of Ampere Computing, a U.S. chip startup founded by the former president of Intel >.** Nvidia NVDA.O CEO Jensen Huang said on Wednesday that his company had not been approached about purchasing a stake in Intel INTC.O.** The Doctors Company said on Wednesday it had agreed to buy ProAssurance for $25 per share in cash, valuing the New York-listed medical liability insurer at $1.3 billion.