3D stocks have been on a tear over the last twelve months. 3D Systems Corporation (DDD) was about 19 a share a year ago, eventually shooting above 70 recently, now dropping back to the mid 50's. Stratasys (SSYS) had a similar move.
For a free list of these and other companies involved in 3D printing, which can be downloaded, sorted, and updated, go to WallStreetNewsNetwork.com.
Disclosure: Author didn't own any of the above at the time the article was written.