Facebook is appealing the class certifications, which the Menlo Park, California-based company said are "without merit" and conflict with "well-settled" precedent
Buffett typically makes his donations in July, reducing the number of shares by 5 percent from the prior year.
Steven Heldt said 95 per cent of Tata's 14,000-person US workforce descend from South Asia.
Greg Abel and Ajit Jain would be prime candidates
Berkshire has owned P&G stock since P&G bought Gillette Co in 2005. Buffett had invested in Gillette since 1989.
Pfizer Inc and Ranbaxy Laboratories Ltd on Friday won dismissal of a U.S. antitrust lawsuit accusing them of conspiring to delay sales of generic versions of the best-selling cholesterol drug Lipitor.
Some analysts view as a microcosm of the US economy.
Employees accused them of limiting competition by colluding not to poach each other's talent.
In a lawsuit filed in US District Court in Manhattan, Precedo Capital Group Inc and Continental Advisors SA accused Twitter of using the aborted sale as a means to give the money-losing company a $10 billion market valuation and higher IPO price.
The Gupta case is SEC v. Gupta, US District Court, Southern District of New York, No. 11-07566.
Google Inc notched a legal victory in its bid to create the world's largest digital books library, winning the reversal of a court order that had allowed authors challenging the project to sue as a group.
The court rejected Rajaratnam's arguments that wiretap evidence in his case should have been suppressed.
Buffett said the economy is benefiting from improvement in areas that had not previously performed well, particularly homebuilding.
A former Rochdale Securities trader whose unauthorised purchase of about $1 billion of Apple Inc stock caused the demise of the company pleaded guilty to fraud and conspiracy.
The government said in a court filing it was seeking civil money penalties from S&P and McGraw Hill.