(RTTNews) – GoPro Inc. (GPRO) – Shares of the action camera maker gained nearly 5% in extended session on top of its 30% rise in regular trading Wednesday. GoPro announced that its subscribers increased to over 500,000, up from 400,000 in August. It also said that the target of 600,000 to 700,000 subscribers by year-end should be exceeded if adoption rates continue as expected.

Alphatec Holdings, Inc. (ATEC) – Shares of the medical device company surged 45% in after-hours trade Wednesday on its third-quarter outlook. Alphatec expects third-quarter revenues of $40.7 million to $41.1 million, which is above analysts current estimates of $30.98 million. The company expects U.S. revenue growth of 41% to 43%.

CareDx, Inc (CDNA) – The health care company’s stock gained 15% in after-hours Wednesday driven by its strong outlook. For the third quarter, CareDx expects revenues of about $53.0 million, an increase of 57% compared to

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