Rigel Gains 77% in 3 Months: Is This an Indication to Buy the Stock?

Core Insights - Rigel Pharmaceuticals (RIGL) shares have surged 76.7% over the past three months, driven by investor confidence in the growth of its lead drug, Tavalisse, and other marketed products [1][11]. Product Performance - Tavalisse, an oral spleen tyrosine kinase inhibitor, is FDA-approved for treating adult patients with chronic immune thrombocytopenia (ITP) who have had insufficient response to prior treatments. It is also approved in several other countries [2]. - In Q2 2025, Rigel's net product sales increased by 76.2% year over year, with Tavalisse accounting for over 65% of these sales, marking the company's best quarter ever [3][11]. - Tavalisse generated sales of $68.5 million in the first half of 2025, reflecting a 44% year-over-year increase, driven by strong new patient demand [4]. - Rigel's second FDA-approved product, Rezlidhia, indicated for relapsed/refractory acute myeloid leukemia (AML), saw sales increase by 31% year over year in the first half of 2025 [5]. - The company has also added Gavreto to its portfolio, which contributed to sales growth in the first half of 2025 [7]. Financial Guidance - Rigel has raised its total revenue guidance for 2025 to $270-$280 million, up from a previous estimate of $200-$210 million. Net product sales are now expected to be between $210-$220 million, compared to the earlier guidance of $185-$192 million [8][11]. Market Outlook - Sales are anticipated to grow steadily as Rigel expands its commercial footprint and enhances its marketing infrastructure, focusing on Tavalisse, Rezlidhia, and Gavreto [9]. - Rigel's stock has outperformed the industry and the S&P 500, with a year-to-date increase of 103.5% compared to the industry's 9.9% rise [16]. Valuation and Earnings Estimates - Rigel is currently trading at a price-to-sales (P/S) ratio of 2.32, which is lower than the industry average of 2.42 [17]. - The Zacks Consensus Estimate for 2025 earnings per share (EPS) has risen from $2.25 to $5.10 over the past 60 days, with 2026 EPS estimates increasing from $1.60 to $3.07 [20]. Pipeline Development - Rigel is developing additional candidates, including R289, a dual IRAK1 and IRAK4 inhibitor, which has received Orphan Drug designation for treating myelodysplastic syndromes [12][13].