 NORTH HUNTINGDON, Pa.--BUSINESS WIRE--The ExOne Company Nasdaq: XONE, the global leader in industrial sand and metal 3D printers using binder jetting technology, announced today that John Hartner, Chief Executive Officer, and Doug Zemba, Chief Financial Officer and Treasurer, will present in a fireside chat format and participate in one-on-one meetings at the Stifel 2021 Cross Sector Insight Conference on Wednesday, June 9, 2021. ExOnes fireside chat will begin at 1:20 p.m. Eastern Time. A 