Last mentioned: Mar 12, 2026
Lead Counsel Appointment
Expected timeframe for the court to designate the lead plaintiff and legal representation.
Lead Plaintiff Deadline
Final day for affected investors to petition the court to lead the class action.
Lead Plaintiff Deadline
Estimated deadline for investors to file motions to be appointed as lead plaintiff in the respective cases.
Lawsuit Announcements
Schall Law Firm files class action notices for Soleno Therapeutics and Ultragenyx Pharmaceutical.
Market Reaction
Investors and analysts begin assessing the potential litigation overhang on RARE, MREO, FRMI, and NAVN.
Investor Alerts Issued
Pomerantz Law Firm releases simultaneous reminders for class action lawsuits against four companies.
The Schall Law Firm has initiated securities fraud class actions against Soleno Therapeutics and Ultragenyx Pharmaceutical, alleging violations of federal securities laws. The firm is currently seeking lead plaintiffs to represent the class in these high-stakes biotech litigations following potential misrepresentations to the market.
Pomerantz Law Firm has issued a series of investor alerts regarding class action lawsuits against Ultragenyx Pharmaceutical, Fermi Inc., Mereo BioPharma, and Navan, Inc. These filings highlight a surge in securities litigation targeting volatility in the biotechnology and emerging technology sectors, emphasizing critical lead plaintiff deadlines for affected shareholders.
This page surfaces every story mentioning Ultragenyx Pharmaceutical Inc. across our legal coverage. We track each entity's appearance over time so readers can trace how the narrative evolves — which developments are isolated incidents, which build into longer arcs, and which reframe how operators in the space think about the entity. Story selection uses the same multi-source verification gate applied across the rest of our coverage.
Read our editorial methodology for how we identify, deduplicate, and score entity references. Our glossary defines the technical terms used across stories on this page, and our trends index contextualizes individual developments against the longer-running legal beat. Cross-entity comparisons live on our compare view.
| What you see | What it tells you |
|---|---|
| Story count | Number of distinct stories where Ultragenyx Pharmaceutical Inc. was a primary or referenced actor. |
| Recency clustering | Whether mentions are concentrated in a recent window (a news cycle) or distributed (a sustained arc). |
| Sentiment distribution | Aggregate sentiment of the stories mentioning this entity, weighted by impact score. |
| Cross-niche links | When the same entity surfaces in our sibling networks, we link to those views to enrich context. |