Summary of PTCT Earnings Call (Q1 2026)

1Key Financial Results and Metrics

Total Revenue: $273 million for Q1 2026, a 47% increase from $153 million in Q1 2025.

Product Revenue: $226 million, with Sephience contributing $125 million and the DMD franchise generating $81 million.

Translarna Revenue: $59 million, boosted by a large government purchase order.

Emflaza Revenue: $22 million, despite facing generic competition.

Royalty Revenue: $47 million from Evrysdi, with no cash proceeds to PTCT.

Cash Position: $1.89 billion as of March 31, 2026, down from $1.95 billion at year-end 2025.

2Strategic Updates and Business Highlights

Sephience Launch: Strong momentum with a 36% quarter-over-quarter growth; 1,244 commercial patients globally, with over 90% of U.S. PKU centers prescribing it.

International Expansion: First sales in Japan ahead of schedule; aiming for commercial sales in up to 30 countries by year-end.

R&D Pipeline: Positive interim results from the votoplam Huntington's disease program; plans for an open-label study for vatiquinone to support NDA resubmission.

Other Pipeline Programs: Progress in PTC612 (NLRP3 inhibitor) and MSH3 oral splicing program for Huntington's disease and DM1.

3Forward Guidance and Outlook

2026 Full-Year Product Revenue Guidance: Raised to $750 million to $850 million, with total revenue expected to be $1.08 billion to $1.18 billion.

Long-Term Potential: Confidence in a $2 billion-plus global commercial opportunity for Sephience, with ongoing growth expected in both U.S. and international markets.

4Bad News, Challenges, or Points of Concern

DMD Franchise Headwinds: Facing challenges from generic competition, particularly for Emflaza, which is expected to continue.

Market Dynamics: Uncertainty regarding mature products like Translarna due to fluctuating government orders and pricing pressures in various markets.

Patient Discontinuation Rates: While currently low in double digits, understanding reasons for discontinuation remains important, especially among challenging patient demographics.

5Notable Q&A Insights

Patient Start Forms: Consistent cadence of around 140 new patient starts per month is expected to continue, though fluctuations are possible.

Payer Dynamics: Favorable coverage with limited restrictions; most patients are moving through prior authorization processes quickly.

Competitive Landscape: Confidence in Sephience's position as a first-line therapy, with potential for complementary therapies rather than direct competition.

International Launch Dynamics: Early success in Japan mirrors U.S. trends, with a focus on maintaining pricing and reimbursement stability. Overall, PTCT reported a strong start to 2026, driven by the successful launch of Sephience and a solid financial position, while navigating challenges in the DMD franchise and the competitive landscape.