Why this top-ranked IBD 50 stock just plummeted on its earnings. * ALLISON GATLIN * Updated 05:08 PM ET 08/05/2026 IBD 50 stock Exelixis (EXEL) toppled late Wednesday on a mixed second-quarter report, as sales of its bread-and-butter cancer drug, cabozantinib, lagged expectations. The biotech company sells cabozantinib under the brand names Cabometyx and Cometriq. The former - a treatment for kidney, liver and thyroid cancers as well as neuroendocrine tumors - brought in $570.6 million in quarterly sales. Cometriq, which treats a form of thyroid cancer, generated $2.4 million in sales. But analysts called for a healthier $578 million and $3 million in sales, respectively. Biotech's Next Boom? Inside The Multibillion Dollar Cancer Detection Market On this episode of Growth Stories, Investors take a look at the groundbreaking tests that could revolutionize cancer detection and what investors need to know about this evolving market. 0 seconds of 10 minutes, 57 secondsVolume 0% Biotech's Next Boom? Inside The Multibillion Dollar Cancer Detection Market See All Videos In response, Exelixis stock slumped more than 5% in after-hours trades on today's stock market, hitting 53.50. Exelixis' sales disappointment. The sales disappointment led Exelixis to cut its earnings outlook for the year. The company now sees $2.5 billion to $2.55 billion in sales. At the midpoint, that's a drop of $50 million from Exelixis' prior guidance from three months ago. More promisingly, Exelixis topped earnings forecasts, reporting an adjusted 91 cents per share, vs. the Street's forecast for 85 cents, according to FactSet. Earnings grew more than 21% as total sales climbed close to 11%, reaching $627.8 million. That includes sales of Cabometyx and Cometriq, as well as $53.2 million in royalties from partners Ipsen and Takeda Pharmaceutical. But sales lagged projections for $636 million. Investors are now watching closely the next steps for zanzalintinib. The Food and Drug Administration is reviewing the experimental prostate cancer treatment for potential approval in December. Exelixis stock is trading above its key moving averages with a nearly perfect IBD Digital Composite Rating of 98. The CR is a 1-99 measure of a stock's fundamental and technical performance. The stock also has a strong Relative Strength Rating of 90, putting its 12-month performance in the leading 10% of all stocks. Exelixis stock ranks No. 16 on the IBD 50 list of elite growth stocks. IBD newsletters. Get exclusive IBD analysis and actionable news daily. Follow Allison Gatlin on X/Twitter at @AGatlin_IBD. YOU MAY ALSO LIKE:

Exelixis reported second quarter 2026 total revenues of $628.7 million, up from $568.3 million in the same period last year. Net product revenues reached $573.0 million, compared to $520.0 million in 2025, driven primarily by increased sales volume. The company reported GAAP net income of $212.1 million, or $0.82 per diluted share, versus $184.8 million, or $0.65 per diluted share, in the prior year period. Research and development expenses increased to $212.0 million from $200.4 million. Exelixis is preparing for a potential launch of zanzalintinib in metastatic colorectal cancer, pending regulatory approval. The FDA assigned a target action date of 3 December 2026 for the new drug application. The company expects topline results from its phase 3 STELLAR-304 trial in the second half of 2026.