Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

All of the Company’s subsidiaries listed below are wholly owned.

Name	Jurisdiction of Incorporation or Organization
PL-US International LLC Rapid Machine Group LLC Rapid Sheet Metal LLC NH Rapid Machining LLC Rapid Wire and Cable LLC Proto Labs Ltd. PL Euro Services Ltd. PL International UK LLP PL International Holdings UK Ltd. Proto Labs Distribution Ltd. PL DE Holding GmbH Proto Labs GmbH Proto Labs Eschenlohe GmbH PL Finland Oy Proto Labs AB Proto Labs G.K.	United States United States United States United States United States United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom Germany Germany Germany Finland Sweden Japan