Jim Simons's position in Builders Firstsource is currently worth $40.4 Million. That's 0.06% of their equity portfolio (358th largest holding). The first Builders Firstsource trade was made in Q4 2013. Since then Jim Simons bought shares twenty more times and sold shares on seventeen occasions. The stake costed the investor $19.5 Million, netting the investor a gain of 107% so far.