We at Insider Monkey have gone over 821 13F filings that hedge funds and prominent investors are required to file by the SEC The 13F filings show the funds' and investors' portfolio positions as of March 31st, near the height of the coronavirus market crash. In this article, we look at what those funds think of Horizon Therapeutics Public Limited Company (NASDAQ:HZNP) based on that data. Horizon Therapeutics Public Limited Company (NASDAQ:HZNP) investors should pay attention to an increase in activity from the world's largest hedge funds lately. HZNP was in 41 hedge funds' portfolios at the end of March.