Ionis Pharmaceuticals, Inc. (NASDAQ:IONS) is one of the best strong buy healthcare stocks to invest in. Ionis Pharmaceuticals, Inc. (NASDAQ:IONS) released its fiscal Q4 and full-year 2025 earnings on February 25, reporting that total revenue for the year ended December 31, 2025, was $944 million compared to $705 in the previous year, considerably surpassing expectations due to continued commercial success. The company also earned substantial R&D revenue, including a $280 million upfront payment for the glo ...