3D Systems (U.S.)
Stratasys (Israel)
Materialise (Belgium)
EOS GmbH (Germany)
General Electric Company (U.S.)
CleanGreen3D (Mcor Technologies Limited) (U.S.)
Ultimaker BV (Netherlands)
Proto Labs Inc. (U.S.)
Relativity Space (U.S.)
The ExOne Company (U.S.)