Biotech Tracker
MilestoneQ3 2026a window, not a day

PTC844 (next-gen DHODH inhibitor) Phase 2a study initiation

PTC844 (next-gen DHODH inhibitor) Phase 2a study initiation, in Q3 2026 (Jul–Sep). A company milestone for PTC (PTC844 for undisclosed (DHODH inhibitor)): a step in the program rather than a decision or a data readout.

Plain-English summary generated from this entry’s own fields (drug, condition, stage, date). Glossary

DetailsCompany milestone
Company
PTC Therapeutics, Inc. PTCT
Drug
PTC844
For
undisclosed (DHODH inhibitor)
Stage
Phase 2a
When
Q3 2026 · the company gave a window, not a day; the calendar never invents one
Source note
Q2 2026 results PR (Jul 30, 2026). PTC612 NLRP3 Phase 1 already initiated in Q2.
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PTC Therapeutics, Inc.
2 upcoming · 4 past catalysts
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MilestonePTCTPTCH2 2026

FDA engagement on votoplam PIVOT-HD 24-month results in Huntington's disease, expected in the second half of 2026 (no exact date yet). A company milestone for PTC (votoplam (PTC518) for Huntington's disease): a step in the program rather than a decision or a data readout.

More details
Entry
FDA engagement on votoplam PIVOT-HD 24-month results in Huntington's disease · Company milestone
Drug
votoplam (PTC518)
For
Huntington's disease
Stage
Phase 3 · the last stage before a drug can be approved
When
H2 2026 · the company gave a window, not a day
Source note
Company plans to engage with FDA in 2H 2026 to discuss PIVOT-HD 24-month results; outcome frames a potential accelerated path for the Novartis-partnered program.
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Plain-English summary generated from this entry’s own fields (drug, condition, stage, date). Glossary · Open this catalyst’s page

MilestonePTCTPTC2027

PTC303 (MSH3 splicing) clinical entry, expected during 2027 (no exact date yet). A company milestone for PTC (PTC303 for somatic expansion disorders (Huntington's disease, myotonic dystrophy)): a step in the program rather than a decision or a data readout.

More details
Entry
PTC303 (MSH3 splicing) clinical entry · Company milestone
Drug
PTC303
For
somatic expansion disorders (Huntington's disease, myotonic dystrophy)
Stage
Phase 1 · an early safety study in a small group of people
When
2027 · the company gave a window, not a day
Source note
Company plans to enter the clinic in 2027 (year-level guidance only).
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Plain-English summary generated from this entry’s own fields (drug, condition, stage, date). Glossary · Open this catalyst’s page