Fourth-Quarter and Full-Year 2019 Orphan and Rheumatology Segment Results slide image

Fourth-Quarter and Full-Year 2019 Orphan and Rheumatology Segment Results

Horizon: A Differentiated Investment Opportunity We are a leading, high-growth profitable biopharma company ⚫ Differentiated commercial model; generating annual net sales of $1.3B only 8 years post IPO • • Focused on rare diseases and presence in rheumatology, nephrology, ophthalmology and endocrinology Two high-growth drivers with >$2B in combined peak U.S. annual net sales potential(1) 呂 Delivering innovative therapies to patients Deep development expertise with proven track record . Building a pipeline through M&A to support sustainable long-term growth 123.7% 85.3% $ Generating high returns for shareholders 38.7% 25.1% • Outperformed NBI for 1, 3, 5 years Our prospects position us with a top-tier growth profile 1-year 3-year HZNP (1) Horizon estimate. HI HORIZON 180.8% 21.9% 5-year NBI (Nasdaq Biotechnology Index) Total Shareholder Return through Dec. 31, 2019 4
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