This document provides a summary of trends in the 3D printing technology sector based on an analysis of 374 startups with $1.4 billion in total funding. It describes the nine main categories of 3D printing startups and notes that 3D printer manufacturers receive the most funding. Trends discussed include steady growth in 3D printing technology funding since 2011, with more mature startups receiving later-stage rounds. Recent funding events include over $95 million raised by startups since November 2016, while acquisitions have been the most common exit.