Stanley Druckenmiller's position in Builders Firstsource is currently worth $38.6 Million. That's 1.35% of their equity portfolio (16th largest holding). The first Builders Firstsource trade was made in Q1 2021. Since then Stanley Druckenmiller bought shares two more times and sold shares on three occasions. The stake costed the investor $34.5 Million, netting the investor a gain of 12% so far.