Ken Griffin acquired 225 Thousand National Grid Plc - ADR shares worth $15 Million. That's 0.02% of their equity portfolio (932nd largest holding). The first National Grid Plc - ADR trade was made in Q2 2017. Since then Ken Griffin bought shares 45 more times and sold shares on 32 occasions. The stake costed the investor $14.6 Million, netting the investor a gain of 2.8% so far.