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.

Momentive plans to raise up to $862.5m in its initial public offering, according to its regulatory filing. Apollo owns 89.5% of Momentive, with GE Capital Equity Investments, a subsidiary of General Electric, holding 8.9%.

Goldman Sachs, Citigroup and Deutsche Bank are serving as co-lead underwriters for US-based solar power tower developer BrightSource Energy's flotation, although their peer Morgan Stanley, which owns 10.5% of its portfolio company.

Impinj, a US-based provider of radio-frequency identification (RFID) tags, filed for a $100m initial public offering (IPO) while Phoenix New Media, the digital media arm of Phoenix Satellite Television, plans to raise double that.

21Vianet had planned to raise $158.7m by issuing 11.5 million American depositary shares (ADSs), each representing six class A ordinary shares, according to its regulatory filing. Instead, it priced 13 million ADSs at $15 each and closed its first day of trading up 25%.

Sagent Pharmaceuticals sold 5.75 million shares at $16 each, compared to plans to price five million shares at between $14 and $16 per share.

Investment banks Stifel Nicolaus Weisel and Piper Jaffray are co-lead underwriters of Envivio's initial public offering (IPO) and the company posted a $2m net loss on $30m of revenues last year, according to its regulatory filing.

Softbank owns 39.6% of RenRen after buying more than a third of the company in 2008's series D round for $415m and will be diluted to 34.2% after the initial public offering.

publisher International Data Group's China-based corporate venturing unit floats Qihoo 360 Technology with first day pop and raises two funds.