Deals of the day-Mergers and acquisitions

(Adds Unikrn, Daimler, Energen, Louis Dreyfus, MassMutual, Hellman & Friedman; Updates Lufthansa) Aug 17 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Thursday: ** The energy unit of Warren Buffett's Berkshire Hathaway Inc said it will "stand firm" on its $9 billion offer to acquire 80 percent of Oncor Electric Delivery Company LLC and will not increase its offer. ** Hellman & Friedman LLC is exploring the sale of a stake in HUB International Ltd in a deal that could value one of the largest North American insurance brokerages at between $6 billion and $7 billion, including debt, people familiar with the matter said. ** U.S.-based insurer MassMutual said it would sell its Hong Kong business to Yunfeng Financial Group and other Asian investors for $1.68 billion in a cash and stock deal. ** United Rentals Inc, the world's largest construction equipment rental company, will buy Neff Corp for about $1.3 billion, the companies said, topping H&E Equipment Services Inc's about $1.2 billion offer last month. ** German carmakers Daimler and BMW may be in talks to combine their car-sharing services Car2Go and DriveNow, the chief executive of car rental company and DriveNow partner Sixt hinted. ** A first round of formal talks for the sale of insolvent German airline Air Berlin's assets will be held with its bigger local rival Lufthansa on Friday, ahead of other prospective bidders, a senior labour union official said. ** German carmakers Daimler and BMW may be in talks to combine their car-sharing services Car2Go and DriveNow, the chief executive of car rental company and DriveNow partner Sixt hinted. ** Unikrn, a U.S. sports betting digital platform backed by some of the biggest names in media, entertainment and sports, will launch the sale of $100 million in cryptocurrency next month, the company's co-founder and chief executive officer, Rahul Sood, told Reuters in an interview earlier this week. ** Elliott Management Corp has quietly ramped up pressure on Energen Corp EGN.N to explore a sale, according to two people familiar with the matter, as the U.S. oil and gas producer fends off heavy pressure from activist investors to sell itself. ** Brazilian rental car firm Movida Participações SA said it had agreed to buy BVHD Locação de Veículos e Serviços Ltda, which operates the brand "Fleet Services," for 22 million reais ($6.95 million). ** Swiss digital currency exchange ShapeShift AG said it has acquired Seattle-based KeepKey Holder LLC, a maker of devices known as digital wallets, in an all-bitcoin deal. ** Brazilian prosecutors plan to investigate last year's controversial sale of the Argentine subsidiary of Petrobras, Brazil's state-controlled oil company, a lawyer representing some Petrobras shareholders said. ** Silver Run Acquisition II, a private equity backed oil and gas startup led by the former chief executive of Anadarko Petroleum Corp, has agreed to acquire two Oklahoma energy companies. ** Proprietary trading firm DRW Holdings said it agreed to buy RGM Advisors, in the latest example of consolidation among high-frequency trading (HFT) firms, which have struggled remain profitable amid rising costs and low market volatility. ** Nets A/S, Scandinavia's largest payments processor, is seeing "considerable interest" from potential buyers amid a wave of M&A activity, the company's chief executive said. ** A group of bondholders who owned debt in Spain's failed Banco Popular filed a lawsuit asking for the lender's rescue and sale to be cancelled, joining a growing series of legal challenges against the European Union's intervention. ** Investor William Ackman said his hedge fund had bought and sold a stake in Hilton Worldwide Holdings, identifying the portfolio company that recently earned him a double digit return. ** Dongfeng Motor Group has no plans at the moment to acquire all or part of Fiat Chrysler Automobiles NV (FCA) , a spokesman of the Chinese automaker said in response to a question by Reuters. ** Louis Dreyfus Company has agreed to sell a juice storage and blending facility in the United States to juice specialist Prodalim Group, as the agricultural commodity trader continues to revamp its juice business. (Compiled by Roopal Verma and Arunima Banerjee in Bengaluru)