Ken Griffin acquired 4.15 Million Horizon Therapeutics Plc shares worth $483 Million. That's 0.52% of their equity portfolio (19th largest holding). The investor owns Inf% of the outstanding Horizon Therapeutics Plc stock. The first Horizon Therapeutics Plc trade was made in Q2 2019. Since then Ken Griffin bought shares nine more times and sold shares on seven occasions. The stake costed the investor $284 Million, netting the investor a gain of 70% so far.