Jim Simons's position in Proto Labs is currently worth $31.2M. That's 0.04% of their equity portfolio (492nd largest holding). The investor owns 1.89% of the outstanding Proto Labs stock. The first Proto Labs trade was made in Q3 2015. Since then Jim Simons bought shares eighteen more times and sold shares on thirteen occasions. The stake costed the investor $25.4M, netting the investor a gain of 23% so far.