Hey guys! As you know 3D printing is growing at an exponential rate. In my opinion this means that investments into companies involved in 3D Printing are as close to a sure bet as you can get. I Currently have 3 Companies in my portfolio which have their main business in the 3D Printing industry. Here they are. Please add to this list!

DDD - 3D Sys - Manufactures 3D Printers
SSYS - Statasys - Manufactures 3D Printers
ONVO - Organova Holding - 3D prints human tissue