Structure Therapeutics (GPCR) Stock Surges 10% as GLP-1 Pill Outperforms Lilly and Novo

TLDR

• Structure Therapeutics’ GLP-1 pill aleniglipron showed 16.3% placebo-adjusted weight loss at 44 weeks in its Phase 2 ACCESS II trial
• Results beat competing oral GLP-1 drugs from Novo Nordisk (13.6%) and Eli Lilly (12.4%) in Phase 2 data
• Weight loss showed no signs of plateauing, a key differentiator from rivals
• GPCR stock rose ~10% on Monday to around $59.80 on the news
• An end-of-Phase 2 FDA meeting is planned for Q2 2026, with Phase 3 set to begin in H2 2026

Structure Therapeutics reported strong Phase 2 data for its oral GLP-1 drug aleniglipron on Monday, sending GPCR up around 10% in morning trading.

Structure Therapeutics Inc., GPCR

The ACCESS II trial showed 16.3% placebo-adjusted weight loss at the 180 mg dose and 16.0% at the 240 mg dose after 44 weeks. Neither dose showed any sign of plateauing.

That compares well to rivals. Novo Nordisk’s oral Wegovy pill showed 13.6% weight loss in Phase 3. Eli Lilly’s orforglipron showed roughly 12.4% in Phase 2, and 11.2% in Phase 3.

Earlier data from December had shown 14.2% weight loss at a lower dose. Patients who stayed on that lower dose for 53 weeks eventually reached 16% weight loss, pointing to continued benefit over time.

Tolerability data also held up. In the ACCESS Open Label Extension study, the adverse event-related discontinuation rate was just 2%. The body composition study showed a 3.4% rate. Structure uses a low 2.5 mg starting dose, which appears to be helping patients stay on the drug.

The results are now generating M&A chatter. H.C. Wainwright analyst Ananda Ghosh had already flagged aleniglipron earlier this month as “the most acquirable asset in obesity.” The firm raised its price target to $114. Citizens kept a Market Outperform rating but trimmed its target to $113.

Analyst Reactions

Leerink Partners reiterated its Outperform rating and $90 price target after the data dropped. The firm highlighted the clean tolerability profile and the dose-response relationship as key positives.

RBC Capital Markets was more measured. Analyst Trung Huynh noted that orforglipron performed similarly in Phase 2, only to come in lower in Phase 3. He flagged an unusually low rate of weight gain in the placebo group as a statistical quirk worth watching. RBC kept its Outperform rating on Lilly with a $1,250 price target.

What Comes Next

Structure plans an end-of-Phase 2 meeting with the FDA in Q2 2026. Phase 3 is expected to kick off in the second half of the year. The Phase 2 data from both high doses will inform which dose moves forward.

The stock is still down 23% year-to-date heading into Monday’s session, though it has gained 155% over the past 12 months. At $59.80, the stock trades well below analyst consensus targets, which range from $90 to $140.

Cantor Fitzgerald had previously flagged this 44-week readout as a potential catalyst for the stock. That call proved correct.

Monday’s move pushed GPCR’s market cap to approximately $3.81 billion.

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