Jeremy Grantham's position in Owens Corning is currently worth $8.34 Million. That's 0.03% of their equity portfolio (254th largest holding). The first Owens Corning trade was made in Q3 2017. Since then Jeremy Grantham bought shares sixteen more times and sold shares on twelve occasions. The stake costed the investor $4.81 Million, netting the investor a gain of 73% so far.