Clear orthodontic correction device maker Align Technology (NSDQ:ALGN) saw its shares rise 131% last year, making it second on the S&P 500 rankings for the full-year 2017, according to a Seeking Alpha report.

The company was only slightly behind the front-runner, power company NRG, who saw shares grow 132.3% over the year, according to the report.

Also in the top 20 was Sunnyvale, Calif.-based robotic surgical developer Intuitive Surgical (NSDQ:ISRG), which saw its shares grow 72.6% over the year, according to Seeking Alpha.

The only medtech-related firm in the bottom 20 of the S&P 500 was the conglomerate GE (NYSE:GE), who saw shares shrink 44.8% during 2017, according to the report.

In Dow standings for 2017, Johnson & Johnson (NYSE:JNJ) was the only medtech company to breach the top 20, ranking in at 16 with a 21.2% increase, according to a separate report from Seeking Alpha.