Rizvi and his clients hold a 15% stake in the San Francisco-based firm.
Colleges to train 300 million youngsters who join the workforce over two decades.
Potential NYSE listing to value the microblogging service at around $16bn.
E-commerce giant could raise about $12.9bn through the IPO.
Deal valued at more than A$600m.
SPECIAL REPORT: MPs demand an overhaul of bankruptcy law, horrified at how an alleged £7m smuggling case ruined a business, after its directors were pursued by liquidators from accountancy giant Deloitte.
State-run China Merchants Holdings to operate huge container terminal in Colombo.
Publicis Groupe and US company Omnicom Group have agreed to merge in an all-stock transaction to create the world's largest advertising company with $23 billion in revenue, toppling market leader WPP off the number one spot.
Fast food outlet warns that business will not strengthen in the second half of 2013.
Vacancies unchanged at 2% in first quarter as investment trust tackles challenging market.
Stock surges by nearly 15% in early trade on Friday.
Loans worth 170bn yuan (£18.3bn) offered in the first week of July.
Voluntary retirement scheme set to ease costs of absorbing workers from defunct Laiki Bank.
Al Noor Hospitals sold 38.5m shares, or a 32.9% stake, at an offer price of £5.75 each
Group's turnover remained broadly unchanged at £1.7bn.
UK Competition Commission says Ryanair may have to reduce its stake in Aer Lingus.
Orascom posts a net loss of 19.1m francs in the first quarter.
FirstGroup plans a £615m rights issue, following which Chairman Martin Gilbert would step down.
Full-year profits rise 13% to €569m, as passenger traffic increased by 5% to 79.3 million.
The Bangalore-based firm is already contesting previous tax demands for financial years 2005 to 2008.
Maersk Line reports a profit of $204m in the first quarter as against a loss of $599m, a year ago.
ANA reports overheating of electric distribution panel during 787 test flight.
Zurich's capitalisation ratio under Swiss rules has risen to 185% as of January, 2013, compared to 178% six months ago.
Aviva takes a £54m hit on restructuring costs in the first quarter.
British water utilities Yorkshire Water and Thames Water have attracted foreign investor-attention in the past.
Allianz posts 6.6% rise in quarterly revenues, a new record in the conglomerate's history.
The group's bid pipeline rises to £15.5bn at the beginning of April from £9.5bn in 2012.
Barry Tootell steps down following Moody's downgrade of bank's deposit and senior debt ratings to Ba3, from A3.
First-quarter operating loss rises to €278m from €249m a year ago.
The company adds 715,000 more subscription products in the third quarter.