The company reported revenues of $21.7 million compared to $11.1 million in the year-ago quarter, overshooting analysts' expectations of $17.5 million.
Guardant's lab will make Guardant360 available to doctors and their patients in the region to help identify patients eligible for molecularly targeted drugs.
Just five of the 28 firms in the 360Dx Index saw their share prices rise last month. Veracyte led the gainers, while Accelerate Dx had the sharpest decline.
Analysts cited Guardant's strong liquid biopsy testing portfolio, specifically its Guardant360 assay, as reasons for their optimistic views.
Guardant Health said this week that it closed an initial public offering of approximately 14.4 million shares of its common stock at $19 per share, raising gross proceeds of about $273.1 million.
The study supports the use of liquid biopsy tests to guide treatment decisions, especially in patients who can't be biopsied, or don't have enough tissue available for standard testing.
The expected gross proceeds are more than double what the firm proposed as its original goal for the offering when it filed plans to list its shares in September.
The company said it plans to list its stock on the Nasdaq under the ticker symbol GH.
A Samsung University team found that mutation load measured with the Guardant360 liquid biopsy assay predicted response as well as tissue-based TMB.
Under the terms of the settlement, the lawsuit, counterclaims, and challenges to the patent in inter partes review have been dismissed.