Ken Griffin acquired 3.98 Million Horizon Therapeutics Plc shares worth $398 Million. That's 0.47% of their equity portfolio (21st largest holding). The investor owns 1.74% of the outstanding Horizon Therapeutics Plc stock. The first Horizon Therapeutics Plc trade was made in Q2 2019. Since then Ken Griffin bought shares eight more times and sold shares on six occasions. The stake costed the investor $266 Million, netting the investor a gain of 50% so far.