Jeremy Grantham acquired 4.78 Million Microsoft shares worth $2.28 Billion. It makes up 7.15% of their stock portfolio and is their biggest holding. The first Microsoft trade was made in Q1 2013. Since then Jeremy Grantham bought shares fourteen more times and sold shares on 34 occasions. The stake costed the investor $212 Million, netting the investor a gain of 976% so far.