Jim Simons acquired 3.12 Million National Grid Plc shares worth $219 Million. That's 0.34% of their equity portfolio (45th largest holding). The first National Grid Plc trade was made in Q2 2017. Since then Jim Simons bought shares twelve more times and sold shares on eighteen occasions. The stake costed the investor $185 Million, netting the investor a gain of 19% so far.