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.

Employees accused them of limiting competition by colluding not to poach each other's talent.

US District Judge Jed Rakoff in Manhattan directed Gupta to surrender by 2:00 p.m. EDT (1800 GMT) on that date to start serving his sentence, according to an order issued on Thursday.