Novo invested an additional $4.5m as Alder raised a sum well below the $115m initially targeted.

The pharmaceutical company, backed by Johnson & Johnson, has gone public, but at a price well below its range.

The e-commerce company has set an initial target of $1bn, which is likely to rise, providing a lucrative exit for Yahoo.

The financial data provider, valued at about $5bn last year, will raise up to $750m, with the proceeds to go to its shareholders.

Walmart subsidiary @Walmart Labs has bought Microsoft-backed Adchemy to add to its in-house talent base.

Social media analytics company Awe.sm, which counts advertising agency Kbs+ amongst its investors, has been purchased by Unified.

The Novo-backed protein testing system developer has not decided on how it will invest the proceeds from the initial public offering.

The GSK-backed fungal infection drug developer has raised the maximum again from the $55m initially targeted from an IPO in which Sanofi will become its largest shareholder.

Concur, which invested $40m in the online travel agency in 2011, has agreed a deal to purchase a 25% stake in the company from two of its other investors.

Four startups currently enrolled in Microsoft Ventures' Accelerator Plus initiative are in negotiations to be bought, though no firm announcement is set to be made until graduation later this month.