GLP-1 Pipeline 2026: Obesity Drug Timeline

How Should Researchers Read This Timeline?

The most useful way to read the 2026 obesity pipeline is to separate four event types: approvals already won, pending FDA decisions, Phase 3 readouts that feed future filings, and post-approval launch checkpoints. That framing keeps this page focused on timing instead of duplicating the direct approval answers handled by the drug-specific status pages.

In practice, that means Foundayo now belongs in the post-approval bucket, CagriSema stays in the pending-decision bucket, and retatrutide remains in the readout-to-filing bucket until Lilly confirms a submission. Programs like survodutide, VK2735, and zenagamtide matter because they can change the next filing wave even without an immediate FDA action.

If you need the definitive regulatory answer for one drug, use the linked status page. If you need the master collection of approval pages, start with the Approval Trackers hub. If you need the sequence of what lands next, what reads out next, and what could move the pipeline next, this calendar is the better page.

Which 2026 Windows Matter Most?

The highest-signal regulatory window left in 2026 is CagriSema. After Novo Nordisk’s December 2025 filing, the key question is no longer whether the data set exists, but whether the FDA converts that package into the first approved amylin-plus-GLP-1 obesity product in late 2026.

The densest readout window belongs to retatrutide. Every positive TRIUMPH update increases confidence in Lilly’s future filing package, but each readout is still a catalyst rather than a final approval event. That is why this page tracks milestone sequencing while the retatrutide status page handles the yes-or-no question.

The third important window is the oral segment. Foundayo has already changed the answer on oral obesity drugs, so the remaining question is whether launch uptake, payer access, and later-wave programs like oral VK2735 can reshape the category by year-end.

Why Do Oral and Label-Expansion Dates Matter?

The oral timeline no longer starts with a hypothetical approval question. It now starts with two approved products: the Wegovy pill and Foundayo. That shifts the relevant 2026 events toward launch execution, access checkpoints, and the next datasets that could support broader label or geographic expansion.

That is also why oral VK2735 matters even before approval. Its job in the 2026 calendar is not to answer a status question; it is to show whether a later-wave oral dual agonist can build a competitive filing path against two already-approved oral GLP-1 products.

The same logic applies to comorbidity programs. Sleep apnea, MASH, osteoarthritis, HFpEF, and diabetes readouts are not side stories. They help determine how broad future labels can become, which is why they belong in the calendar even when they do not create an immediate obesity approval event.

What CagriSema Catalysts Are Expected in 2026?

CagriSema (cagrilintide + semaglutide) is the closest obesity drug to an FDA decision in 2026. Novo Nordisk filed the NDA in December 2025 and the FDA has accepted the submission, with review tracking through 2026. The FDA has not publicly confirmed a PDUFA date as of May 25, 2026, and no FDA advisory committee meeting has been scheduled. Third-party trackers commonly assume a late-2026 decision window. For the dedicated answer-style page, see CagriSema FDA approval status; for every pending submission, the obesity drug approval tracker for 2026.

The filing is supported by the REDEFINE clinical program. The pivotal REDEFINE 1 trial showed 22.7% mean weight loss at 68 weeks, significantly exceeding the semaglutide-alone arm. CagriSema combines GLP-1 receptor agonism (semaglutide) with amylin receptor agonism (cagrilintide) in a single injection. A REDEFINE 1 body-composition sub-analysis presented at the European Congress on Obesity (ECO 2026, Istanbul, May 12–15) showed that in patients reaching ≥30% weight loss, fat-mass share fell from 46.3% to 33.2% — supporting a fat-preferential loss profile.

Beyond the FDA decision, the REDEFINE 6 trial (adolescent population, ages 12–17) is expected to read out in 2026. Positive adolescent data would expand the potential prescribing label significantly. Novo Nordisk has also disclosed plans for a high-dose CagriSema Phase 3b program starting in H2 2026 and longer-term cardiovascular outcomes data from the REDEFINE program, though those CVOT results extend beyond 2026.

What Retatrutide Data Is Coming in 2026?

Retatrutide is Eli Lilly’s triple agonist (GLP-1, GIP, and glucagon receptor agonist) and the most potent weight-loss drug in Phase 3 development. The TRIUMPH-4 trial reported topline results on December 11, 2025 showing 28.7% mean body weight reduction at 68 weeks — the highest figure ever reported in a Phase 3 obesity trial. For a mechanistic deep dive, see our explainer on the triple agonist GIP, GLP-1, and glucagon pathway.

Multiple retatrutide readouts have already landed in 2026. TRANSCEND-T2D-1 (Phase 3 in type 2 diabetes) reported topline on March 19, 2026: HbA1c reduction of 1.7–2.0% across the 4, 9, and 12 mg doses and weight loss of 11.5–16.8% (roughly 25–37 lbs) over 40 weeks versus a 2.5% placebo weight change. Discontinuation ran 2.2–5.1% across doses, with nausea (16–26%) and diarrhea (19–26%) as the dominant adverse events. Full TRANSCEND-T2D-1 data are scheduled for an oral presentation at the American Diabetes Association Scientific Sessions on June 5–8, 2026 in New Orleans.

TRIUMPH-1, the 80-week obesity weight-management pivotal trial that supports the NDA package, reported topline results on May 21, 2026. All three doses (4, 9, 12 mg) met the primary and key secondary endpoints, with mean weight loss of 19.0%, 25.9%, and 28.3% at 80 weeks (n=2,339); a blinded BMI ≥35 extension reached 30.3% at 104 weeks. On the April 30 Q1 2026 earnings call, Lilly had guided this readout for “later this quarter.” Full data are expected at the ADA Scientific Sessions.

Additional TRIUMPH Phase 3 readouts remain expected through 2026 and into 2027: TRIUMPH-2 (weight maintenance after dose step-down), TRIUMPH-3 (obesity with cardiovascular disease, NCT05882045), TRIUMPH-5 (MASH/liver disease), TRIUMPH-6 (heart failure with preserved ejection fraction), and TRIUMPH-7 (obstructive sleep apnea). On the Q1 call, Lilly also began framing retatrutide commercially as both a “deeper weight loss” agent and a potential add-on to existing incretins for incremental loss.

Eli Lilly has not confirmed an NDA filing date, but the breadth of the TRIUMPH program suggests a filing in late 2026 or 2027. If filed in late 2026, an FDA decision would come no earlier than mid-to-late 2027. See our retatrutide vs tirzepatide vs CagriSema comparison for how these three leading candidates stack up.

What Is Next for Foundayo (Orforglipron) in 2026?

Orforglipron is no longer a future-approval story in obesity. Lilly’s oral non-peptide GLP-1 was FDA approved as Foundayo on April 1, 2026, making it the first oral GLP-1 for obesity that can be taken at any time of day without food or water restrictions. The 2026 calendar for Foundayo is now about launch execution, the type 2 diabetes label, and ex-U.S. expansion.

In mid-April, Lilly reported topline results from ACHIEVE-4, the seventh and final Phase 3 in the global type 2 diabetes registration package. ACHIEVE-4 met non-inferiority on MACE-4 versus insulin glargine and reported a numerically favorable cardiovascular profile in preplanned unadjusted analyses, with no hepatic safety signal. With ACHIEVE-4 in hand, Lilly is targeting a U.S. type 2 diabetes NDA submission in late Q2 2026 and has guided that FDA action could come before year-end. Reviews are also ongoing in 40-plus countries.

Early U.S. launch metrics, disclosed on the April 30 Q1 earnings call: pharmacy availability began April 9; more than 20,000 patients were on therapy by end of April; more than 8,000 prescribers had written a Foundayo prescription, roughly one-third new to oral GLP-1s; about 80% of scripts were classified as new to the GLP-1 class. The first full launch week ran roughly 5,612 prescriptions by week 3 — modest next to the Wegovy pill, which posted more than 18,000 prescriptions in its first week post-January 5 launch.

Foundayo’s competitive case still rests on convenience: it is a once-daily pill with no food or water dosing restrictions, unlike the Wegovy pill, which requires fasting conditions. That means the 2026 calendar is really a launch-comparison timeline between two approved oral GLP-1 products plus the next investigational oral entrants.

For the direct regulatory answer, use the orforglipron status page. For the post-approval label, pricing, and market-impact view, use the Foundayo deep dive. For a broader oral segment comparison, see our oral obesity drugs 2026 guide.

Where Does Survodutide Stand in 2026?

Survodutide (Boehringer Ingelheim / Zealand Pharma) is a dual GLP-1/glucagon receptor agonist in the Phase 3 SYNCHRONIZE program. The program includes four trials: SYNCHRONIZE-1 (obesity), SYNCHRONIZE-2 (T2D), SYNCHRONIZE-3 (MASH), and SYNCHRONIZE-4.

On April 28, 2026, Boehringer reported SYNCHRONIZE-1 Phase 3 topline: 16.6% mean weight loss at 76 weeks versus 3.2% on placebo in adults with obesity or overweight without type 2 diabetes, using the efficacy estimand. Up to 85.1% of participants achieved at least 5% weight loss versus 38.8% on placebo, with significant waist-circumference reduction driven primarily by fat-mass loss. This is the first Phase 3 readout for any dual GLP-1/glucagon agonist. Full SYNCHRONIZE-1 data are planned for the ADA Scientific Sessions on June 5–8.

The 16.6% figure sits clearly below the Phase 2 best-dose 19% benchmark and below the CagriSema (22.7%) and retatrutide TRIUMPH-4 (28.7%) Phase 3 reference points. That framing matters for how the SYNCHRONIZE-2 (T2D), LIVERAGE and LIVERAGE-Cirrhosis (MASH) readouts — expected later in 2026 — are likely to be received.

Survodutide’s dual-agonist mechanism (GLP-1 + glucagon) differs from retatrutide’s triple-agonist approach and from CagriSema’s GLP-1/amylin combination, making it a structurally distinct competitive entry. Phase 2 data also showed liver-fat reduction, positioning it as a potential MASH therapy candidate alongside the obesity indication. For help evaluating these candidates, see our analysis of the best obesity drug in 2026.

Mazdutide (IBI362): The Dual GLP-1/Glucagon Agonist

Mazdutide (IBI362) is a dual GLP-1/glucagon receptor agonist developed by Innovent Biologics under license from Eli Lilly. It is not a triple agonist — unlike retatrutide, mazdutide omits GIP receptor engagement entirely, activating only two receptor targets (GLP-1R and GCGR). The compound received its first regulatory approval in China in 2025 for type 2 diabetes and weight management at the 4 mg and 6 mg doses. The 9 mg adult-obesity dose hit primary and all key secondary endpoints in GLORY-2 (Nov 2025) at up to 20.1% mean weight loss, and Innovent has guided that the GLORY-2 NMPA NDA filing is pending.

On May 12, 2026, Innovent announced a broad mazdutide presentation slate at ADA 2026 (June 5–8, New Orleans): full GLORY-2 adult obesity data, DREAMS-3 (Phase 3b head-to-head versus semaglutide in Chinese T2D + obesity), and a Phase 1b adolescent obesity PK/safety study. A MASH preclinical poster is also on the program.

Mazdutide’s scientific importance extends beyond its clinical results. Because it isolates GLP-1 + glucagon receptor activation without GIP, comparing mazdutide outcomes to retatrutide’s GLP-1 + GIP + glucagon results allows researchers to infer the approximate contribution of GIP receptor agonism to metabolic outcomes. This makes mazdutide a critical reference compound for understanding why triple agonists achieve higher weight loss than dual agonists. The Chinese regulatory pathway is distinct from the U.S./EU process, so an NMPA approval would not directly translate into FDA action.

What Other Obesity Drugs Have 2026 Milestones?

Wegovy pill (oral semaglutide 25 mg). FDA approved in late 2025, the Wegovy pill is the first oral GLP-1 drug indicated for obesity, building on the Rybelsus oral semaglutide platform originally approved for diabetes. OASIS 4 showed 16.6% mean weight loss. Q1 2026 sales reached approximately DKK 2.26 billion (~US$354M), roughly double consensus estimates, with more than 2 million prescriptions written cumulatively since the January 5 launch and more than 18,000 scripts in the first launch week. Novo Nordisk raised its 2026 sales guidance on the strength of the Wegovy pill ramp.

Zenagamtide (formerly amycretin), Novo Nordisk. This unimolecular GLP-1/amylin agonist has obesity Phase 3 programs underway in both subcutaneous and oral formulations (announced June 2025). On the Q1 2026 results in early May, Novo confirmed that zenagamtide will also advance to Phase 3 in type 2 diabetes following positive Phase 2 weight loss and HbA1c reduction. Phase 2 T2D data are scheduled for an oral presentation at ADA on June 5–8.

VK2735 (Viking Therapeutics). The subcutaneous formulation’s two pivotal Phase 3 obesity trials are now both fully enrolled: VANQUISH-2 completed enrollment on March 26, 2026 and VANQUISH-1 was reported fully enrolled in Viking’s Q1 2026 results on April 29, 2026. Both Phase 3 readouts are expected in 2027. The oral formulation’s full 13-week Phase 2 VENTURE-2 dataset was presented at the European Congress on Obesity on May 12, 2026: up to 12.2% mean weight loss at 120 mg over 13 weeks, no plateau through Week 13, and roughly 80% of participants reaching at least 10% weight loss at the top dose. Viking has guided that oral VK2735 Phase 3 will start in Q4 2026.

Petrelintide (Roche / Zealand Pharma). This amylin analog reported 10.7% weight loss at 42 weeks in the Phase 2 ZUPREME-1 trial. On April 29, 2026, Zealand and Roche jointly announced that petrelintide will advance to Phase 3, with the first pivotal trial planned for initiation in H2 2026.

Mazdutide (Innovent / Eli Lilly China). A dual GLP-1/glucagon agonist in the GLORY Phase 3 program in China; GLORY-2 met endpoints in November 2025 at the 9 mg adult-obesity dose. Full GLORY-2 data, DREAMS-3 head-to-head versus semaglutide, and a Phase 1b adolescent obesity study are slated for ADA presentations in June. NMPA NDA filing for the 9 mg adult-obesity dose remains pending.