Tableau Software

CEO: Adam Selipsky

Dec. 30, 2016: $42.15

June 30, 2017: $61.27

Change: +45.36%

In 2016 Tableau's stock recorded the biggest decline among the companies on our watch list, largely due to a big drop in its stock price early in the year on what analysts saw as weak guidance for future results. So it's quite a turnaround for the company's stock to record the biggest share price gain in the first half of 2017.

For the first quarter of 2017 (ended March 31), Tableau reported revenue of $199.9 million, up 16 percent year over year from $171.7 million in first quarter of 2016. But the company's loss for the quarter increased to $54.6 million from $45.6 million in the same quarter one year earlier.

On June 1 Tableau released the 10.3 edition of its flagship data visualization software with data drive alerting, a smart recommendation engine and an expanded range of data connectors.