The Qualcomm and SoftBank-backed wearable fitness tracker maker's stock has almost doubled since it went public on Thursday.

The fitness tracker producer initially hoped to raise $448m through its initial public offering, but has increased the pricing to $20 a share.

The healthcare management software provider, backed by UPMC and The Advisory Board, will raise the money in an upsized initial public offering.

The e-commerce services provider, backed by Alibaba and SoftBank, floated below its range but finished its first day of trading slightly up.

The seed technology developer went public after raising more than $100m in funding from investors including BASF.

Johnson & Johnson and AbbVie bought a combined $55m of stock as the biopharmaceutical company, already listed in Europe, went public on Nasdaq.

Novo, GlaxoSmithKline and Merck-backed molecular profiling platform HTG offered almost 3.6 million shares priced at $14 each.

Pet medicine developer Jaguar Animal Health, backed by Napo Pharmaceuticals, raised $20m after receiving $2.2m of venture funding.