1. Microsoft (MSFT) agreed to buy Skype Technologies for $8.5 billion to gain the world's most popular Internet calling service and its 663 million customers.
2. LinkedIn's IPO, which may take place later this month, will value the No. 1 professional networking website at more than $3 billion. The company says it will sell up to $316 million worth of shares.
3. Australia's Treasury Wine Estates, the world's second-largest winemaker, was spun off by Foster's on May 9. The stock rose in its first day of trading, giving the company a market value of $2.3 billion.
4. MGM China (MGM), the casino joint venture between MGM Resorts International and Pansy Ho, daughter of billionaire Stanley Ho, may raise as much as $1.5 billion in its Hong Kong IPO in June.
5. Russian billionaire Len Blavatnik's Access Industries agreed to buy Warner Music Group, the label of stars like Bruno Mars, (WMG) for about $1.3 billion.
6. Freescale Semiconductor, the chipmaker partly owned by Blackstone Group (BX), may raise up to $1 billion in an IPO. A May 9 filing says the company intends to sell 44 million shares.
7. Alkermes (ALKS), based in Waltham, Mass., will buy Ireland's Elan Drug Technologies in a deal valued at $960 million. The enlarged company will focus on central nervous system disorder drugs.
8. Home-retail giant Canadian Tire agreed to buy Forzani Group for about $800 million, gaining control of Canada's largest sporting-goods retailer.
10. The Pink Panther, a sculpture by Jeff Koons of the character embracing a topless blonde, fetched $16.9 million at a Sotheby's (BID) auction in New York on May 10, a smaller sum than expected.