In this article, we will be taking a look at the 11 Best Performing Biotech Stocks So Far in 2025. PTC Therapeutics, Inc. is one of them. PTC Therapeutics, Inc. (NASDAQ:PTCT) is reinforcing its position in rare disease innovation with the launch of SUFIANCE (sepiapterin) for phenylketonuria (PKU). Recently approved by both the FDA and EU, SUFIANCE rolled out in Germany in July 2025, with a U.S. launch imminent. The drug is projected to generate over $1 billion annually in the U.S., making it a central dri ...