Jim Simons's position in Builders Firstsource is currently worth $51.2 Million. That's 0.08% of their equity portfolio (301st largest holding). The first Builders Firstsource trade was made in Q4 2013. Since then Jim Simons bought shares 21 more times and sold shares on eighteen occasions. The stake costed the investor $14.7 Million, netting the investor a gain of 249% so far.