Victoria Holt made headlines years back with her claim that Protolabs, a manufacturing company specializing in quick-turnaround prototypes, would one day become a $1 billion business. At the end of 2017, the Maple Plain-based company was already over a third of the way there, and in 2018 it was beginning to show signs of reaching the halfway point after posting record sales growth in its first and second quarters. Boosted by recent expansions in Minnesota, New Hampshire, and Europe, Protolabs is positioned to remain at the forefront of the fast-growing 3D printing, injection molding, and additive manufacturing movement that’s helping companies innovate faster.