Fusion-io will issue 10.76 million shares with its owners selling 1.5 million at up to $15 each, before 1.85 million shares can be sold if demand is strong enough.

LinkedIn's shares closed at $94.25 each after the initial public offering of $45 per share and more than doubling its market capitalization to $8.9bn.

Investment banks and shareholders Morgan Stanley, Citigroup and Credit Suisse are underwriting Bats's initial public offering.

Softbank diluted to 34.2% after RenRen's initial public offering, having originally invested $100m in April 2008, according to data provider Zero2IPO. By December last year, Softbank had invested $315m to give a six times return on the book value of its holding at $14 per share, Zero2IPO added.

Four investors have agreed to back Shanghai Pharmaceuticals with $550m to support its initial public offering. Pfizer and Bank of China will each invest $50m, Singapore state-backed Temasek will buy $300m of shares and Malaysia-based conglomerate Guoco Group the remaining $150m.

After more than three months of deliberations, LinkedIn, a social network for 100 million business people, has picked New York Stock Exchange for its flotation.

Shareholders will sell 10.2 millions ADSs, each representing three class A shares, and RenRen issue 42.9 million ADSs. A further 8 million ADSs are available if demand is strong enough with an estimated company valuation of about $4bn.