Structure Therapeutics Inc. (GPCR) Stock: Skyrockets After Positive Obesity Trial Result

GPCR stock jumped more than 99% to about $68.84 after the company reported successful Phase 2 clinical data for aleniglipron, its investigational, once-daily oral treatment being studied for managing body weight and metabolic health.

ACCESS Phase 2b Results Boost Investor Confidence

Structure Therapeutics (NASDAQ: GPCR) announced that its Phase 2b ACCESS trial met all primary and secondary goals with strong statistical results. The study included about 230 adults living in higher-weight bodies who also had related health conditions.

Participants taking up to a 120 mg dose showed consistent reductions in body weight, with the highest-dose group achieving an average 11.3% placebo-adjusted decrease over 36 weeks (equal to about 27 pounds on average).

Around 70% of participants at the highest dose reduced their body weight by more than 10%, showing a clear dose-response pattern. Researchers also reported improvements in blood pressure and HbA1c, suggesting broader metabolic benefits.

Side effects were mostly gastrointestinal and tended to appear early, then improve over time. The average discontinuation rate across active treatment groups was about 10.4%, which is considered manageable and similar to other GLP-1 treatments.

ACCESS II Shows Additional Promise at Higher Doses

The newer ACCESS II study tested even higher doses (up to 240 mg) in 85 adults living in higher-weight bodies. The study saw greater body-weight reduction with higher doses, including a 15.3% placebo-adjusted decrease (about 35.5 pounds) at the top dose, again measured at Week 36.

Importantly, researchers said the effect had not yet plateaued, indicating that weight-related outcomes continued to improve beyond the study timeframe. Safety signals remained consistent, and the overall profile looked similar across doses.

Supporting Research Shows Flexibility for Future Dosing

Structure also reported early results from a body-composition study using a gradual titration approach starting at 2.5 mg. No participants stopped treatment early in the first phases, which supports a slower dosing ramp for real-world use.

The ongoing study and its extension phase are tracking longer-term results, with early signals suggesting progress continues beyond 36 weeks.

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