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William Blair Maintains a Buy on Ultragenyx Pharmaceutical (RARE)

By Noor Ul Ain Rehman | July 16, 2025, 9:38 AM

Ultragenyx Pharmaceutical Inc. (NASDAQ:RARE) is one of the best oversold NASDAQ stocks to buy now. On July 14, William Blair analyst Sami Corwin maintained a bullish stance on Ultragenyx Pharmaceutical Inc. (NASDAQ:RARE), giving it a Buy rating without a price target.

Ultragenyx (RARE) Falls 26% as New Treatment Fails to Get FDA Green Light
A research team in a laboratory peering through microscopes at a biologic product.

The analyst gave a positive rating based on the company’s potential despite recent setbacks. Ultragenyx Pharmaceutical Inc. (NASDAQ:RARE) received a complete response letter from the FDA about UX111 for the treatment of Sanfilippo syndrome type A, citing concerns associated with chemistry, manufacturing, and controls (CMC).

Ultragenyx Pharmaceutical Inc. (NASDAQ:RARE), however, maintains that the complications are not directly related to the quality of the product and are manageable.

The analyst also reasoned that the FDA acknowledged the supportive nature of the clinical data for UX111, which includes biomarker evidence and strong neurodevelopmental outcomes. He stated that while the FDA requested updated clinical data, the existing data package does not have issues, which is a positive sign.

Ultragenyx Pharmaceutical Inc. (NASDAQ:RARE) plans to promptly address the concerns put forth by the FDA and is planning resubmission and potential approval in 2026.

Ultragenyx Pharmaceutical Inc. (NASDAQ:RARE) develops, acquires, and commercializes novel products to treat genetic diseases. Its product portfolio includes Crysvita, Mepsevii, Dojolvi, and Evkeeza.

While we acknowledge the potential of RARE as an investment, we believe certain AI stocks offer greater upside potential and carry less downside risk. If you’re looking for an extremely undervalued AI stock that also stands to benefit significantly from Trump-era tariffs and the onshoring trend, see our free report on the best short-term AI stock.

READ NEXT: 30 Stocks That Should Double in 3 Years and 11 Hidden AI Stocks to Buy Right Now.

Disclosure: None. This article is originally published at Insider Monkey.

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