<img src="https://ml.globenewswire.com/Resource/Download/3a379315-9c07-4655-883e-7e7f26c67778?size=2" nborder="0" align="left" hspace="5" vspace="5" title="Fractyl-Logo.png" alt="Fractyl Health, Inc."/>Up to 84% of GLP-1 induced weight loss retained with Revita® versus 46% with sham at one year in patients receiving complete duodenal ablations Next anticipated Revita® milestones are topline six-month randomized data from the REMAIN-1 Pivotal Cohort in early Q4 2026 and a potential FDA De Novo marketing application submission in late Q4 2026 Company to host investor webcast today at 8:00 a.m. ET BURLINGTON, Mass., July 15, 2026 (GLOBE NEWSWIRE) -- Fractyl Health, Inc. (Nasdaq: GUTS) (the Company or Fractyl), a clinical-stage metabolic therapeutics company focused on pioneering novel approaches to treat obesity and type 2 diabetes (T2D), today announced positive one-year results from its REMAIN-1 Midpoint Cohort (“Midpoint Cohort”). The new results reinforce the potential of the Revita DMR System (Revita) to be the first durable procedural therapy for post-GLP-1 weight maintenance. Key Findings: <ul><li>Dose-dependent durability confirmed at one year: In the full modified intention-to-treat (mITT) population (N=45), a single Revita procedure reduced weight regain by approximately 40% versus sham at one year (least-squares mean weight regain of 7.8% versus 13.0% of body weight; n=29 versus 16 for Revita versus sham). Participants who received complete duodenal ablation (&gt;14 cm) maintained approximately 81% of GLP-1-induced weight loss at one year, compared with 48% in sham participants (least-squares mean weight regain of 4.8% versus 13.0% of body weight; n=17 versus 16 for Revita versus sham), reflecting a reduction in weight regain of over 60% versus sham. This is consistent with earlier findings that more complete duodenal ablation drives greater treatment effect.</li></ul> <ul><li>Greatest benefit in patients with greatest need: In an optimized population of participants who received complete duodenal ablation (&gt;14 cm) and had higher GLP-1 run-in weight loss (≥17.5%), Revita maintained approximately 84% of GLP-1-induced weight loss at one year versus 46% with sham (least-squares mean weight regain of 4.1% versus 13.5% of body weight; n=10 versus 8 for Revita versus sham). These results are consistent with the view that patients at greatest need may derive the greatest benefit from Revita due to their higher propensity for weight regain after GLP-1 discontinuation.</li></ul> <ul><li>Weight-maintenance responder rate: The second co-primary endpoint of the Pivotal Cohort, assessed against a U.S. Food and Drug Administration (FDA) mandated pre-specified performance goal of &gt;50%, measures the proportion of Revita patients maintaining at least 5% total body weight loss relative to their pre-tirzepatide weight at one year. As a reference point for the Pivotal Cohort, this responder rate was 73% in the Midpoint Cohort mITT population, rising to 91% in those with complete duodenal ablation (&gt;14 cm).</li></ul> <ul><li>Excellent tolerability: No device- or procedure-related serious adverse events occurred. No new device-related treatment-emergent adverse events (TEAEs) were observed between six and 12 months. Overall TEAE rates were comparable between arms through one year (24% Revita versus 25% sham), reflecting a generally mild peri-procedural adverse event profile that supports potentially broad outpatient use for Revita. One new diagnosis of type 2 diabetes occurred in the sham arm versus none with Revita. </li></ul> <img alt="Change in body weight in (i) Complete Ablation population: &gt; 14 cm duodenal ablation, no run-in weight loss restriction (Sham n=16, Revita n=17) and (ii) Optimized population: complete ablation (&gt; 14 cm) and run-in weight loss ≥ 17.5% (Sham n=8, Revita n=10). Y-axis: LS-mean % total body-weight change from baseline; MMRM, compound-symmetry covariance, estimated at 20% run-in weight loss; error bars ± SE; n contributing shown per visit below axis. Retention = % of run-in weight loss maintained at 12 months. Exploratory REMAIN-1 Midpoint Cohort subgroup; not powered for formal inference. Abbreviations: MMRM, mixed-model repeated measures; LS-mean, least-squares mean; SE, standard error." data-mce-style="display: block; margin-left: auto; margin-right: auto;" height="367" src="https://ml.globenewswire.com/Resource/Download/7554f2be-93cb-47c9-97a3-76e4a063f6c5/image1.png" style="display:block; margin-left:auto; margin-right:auto;" width="600" data-dpi="192" data-caption="Change in body weight in (i) Complete Ablation population: &gt; 14 cm duodenal ablation, no run-in weight loss restriction (Sham n=16, Revita n=17) and (ii) Optimized population: complete ablation (&gt; 14 cm) and run-in weight loss ≥ 17.5% (Sham n=8, Revita n=10). Y-axis: LS-mean % total body-weight change from baseline; MMRM, compound-symmetry covariance, estimated at 20% run-in weight loss; error bars ± SE; n contributing shown per visit below axis. Retention = % of run-in weight loss maintained at 12 months. Exploratory REMAIN-1 Midpoint Cohort subgroup; not powered for formal inference. Abbreviations: MMRM, mixed-model repeated measures; LS-mean, least-squares mean; SE, standard error." data-filename="image1.png" /> Figure 1: Change in body weight in (i) Complete Ablation population: &gt; 14 cm duodenal ablation, no run-in weight loss restriction (Sham n=16, Revita n=17) and (ii) Optimized population: complete ablation (&gt; 14 cm) and run-in weight loss ≥ 17.5% (Sham n=8, Revita n=10). Y-axis: LS-mean % total body-weight change from baseline; MMRM, compound-symmetry covariance, estimated at 20% run-in weight loss; error bars ± SE; n contributing shown per visit below axis. Retention = % of run-in weight loss maintained at 12 months. Exploratory REMAIN-1 Midpoint Cohort subgroup; not powered for formal inference. Abbreviations: MMRM, mixed-model repeated measures; LS-mean, least-squares mean; SE, standard error. “The success of GLP-1 medicines has created a new unsolved problem: what happens when patients stop. Most do stop eventually, whether because of cost, side effects, or simply not wanting to inject a drug for the rest of their lives. When they stop, the weight most often comes back,” said Harith Rajagopalan, M.D., Ph.D., Co-Founder and Chief Executive Officer of Fractyl. “Today's results are the first randomized, sham-controlled evidence that a single Revita procedure can keep most of the weight off for a full year after GLP-1 is stopped, without the need for ongoing medication. We eagerly anticipate an early Q4 2026 topline readout from the REMAIN-1 Pivotal Cohort with deep conviction that Revita may represent the first procedural entrant into the post-GLP-1 weight maintenance category.” Webcast Fractyl Health will host a webcast today, July 15, 2026, at 8:00 a.m. Eastern Time. The live webcast can be accessed by <a href="https://www.globenewswire.com/Tracker?data=8_lLDCx8GBqTSxYusVtZJbxEeM-iPznJfDF8mbW7tpq4FMvF21U-Sjc092n7EDsYjw67P_y7Dhfv1aDafODcx3ZTDjEadnNsIEZ0UO0GWzrDX63_DpqoCV-q4LrXsUiA" rel="nofollow" target="_blank" title="clicking this link">clicking this link</a>. This webcast can also be found in the “Events” section of Fractyl’s website at ir.fractyl.com. The webcast will be archived and available for replay for at least 30 days after the event. About REMAIN-1 Weight Maintenance Program REMAIN-1 is Fractyl Health’s pivotal program evaluating Revita for weight maintenance in adults with obesity following discontinuation of GLP-1 therapy. The Midpoint Cohort (N=45) is a randomized, double-blind, sham-controlled study in adults who achieved at least 15% total body weight loss on tirzepatide; after discontinuing the drug, participants were randomized 2:1 to a single Revita procedure or a sham endoscopic procedure and followed for one year. The Midpoint Cohort is not powered for formal statistical significance; results are descriptive and are intended to characterize the treatment effect and inform the Pivotal Cohort design and execution. Results in the Midpoint Cohort at one year are evaluated per the pre-specified statistical analysis plan defined for the pivotal study, with GLP-1 weight loss fitted as a covariate on treatment effects, calculated as least-square means at the 20% reference. Both a Complete Ablation cohort (defined as &gt;14cm of duodenal ablation) and an Optimized responder population (with &gt; 14 cm duodenal ablation and ≥17.5% run-in weight loss) are pre-specified key secondary endpoints in the pivotal study. The Pivotal Cohort is fully randomized and well powered at the expected effect size to clear both co-primary endpoints in the modified intention-to-treat (mITT) population: (i) weight regain at six months (Revita versus sham) and (ii) a responder rate defined as the proportion of participants maintaining at least 5% total body weight loss relative to their pre-tirzepatide weight at one year. Topline six-month randomized data from the Pivotal Cohort are anticipated in early Q4 2026. About Revita Revita is Fractyl Health’s lead product candidate, designed to remodel the duodenal lining via a one-time, minimally invasive endoscopic procedure intended to restore healthy nutrient sensing and signaling disrupted by chronic metabolic disease. Revita has received Breakthrough Device designation from the FDA for weight maintenance in people with obesity who discontinue GLP-1 therapies. Revita is for investigational use only in the United States and is CE marked in the European Union and United Kingdom. About Fractyl Health Fractyl Health is a clinical-stage metabolic therapeutics company advancing two differentiated candidates designed to target the root causes of obesity and T2D: Revita, a procedural therapy in pivotal development for post-GLP-1 weight maintenance, and Rejuva, an AAV-based gene therapy platform with its lead candidate RJVA-001 entering first-in-human clinical studies. Fractyl’s goal is to advance metabolic disease treatment from chronic management toward prevention and reversal of disease. Fractyl is headquartered in Burlington, Massachusetts. Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this press release that do not relate to matters of historical fact are forward-looking statements. These statements may be identified by words such as “aims,” “anticipates,” “believes,” “could,” “estimates,” “expects,” “forecasts,” “goal,” “intends,” “may,” “plans,” “possible,” “potential,” “seeks,” “will” and variations of these words or similar expressions that are intended to identify forward-looking statements, although not all forward-looking statements contain these words. Forward-looking statements in this press release include, without limitation, statements regarding: the promise and potential impact of our clinical trial data and product candidates, including Revita’s potential for maintaining weight loss after GLP-1 based therapy discontinuation and stabilizing cardiometabolic parameters; the translatability of results and scalability of technique related to Revita; the design, initiation, timing and results of clinical enrollment and any clinical studies or readouts, including readouts from the REMAIN-1 Midpoint Cohort and the REMAIN-1 Pivotal Cohort; the potential launch or commercialization of any of our product candidates or products; our regulatory strategy, including potential use and benefits of the De Novo pathway (FDA pre-submission feedback is advisory and non-binding, and there is no assurance that FDA will accept a De Novo marketing application submission or that Revita will receive marketing authorization); the potential treatment population or benefits for any of our product candidates or products; our strategic and product development objectives and goals; and the timing of any of the foregoing. These statements are neither promises nor guarantees, but involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, but not limited to, the risks that are discussed more fully in our filings with the Securities and Exchange Commission (the SEC), including the “Risk Factors” section of our Annual Report on Form 10-K for the year ended December 31, 2025, filed with the SEC on March 24, 2026, and other documents we subsequently file with or furnish to the SEC, including our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, filed with the SEC on May 12, 2026. These forward-looking statements are based on management’s current estimates and expectations. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change. Contact Brian Luque, Head of Investor Relations and Corporate Development IR@fractyl.com, 951.206.1200 A photo accompanying this announcement is available at <a href="https://www.globenewswire.com/Tracker?data=Z4f0iiRj7O7ZikNwRy7jiVwE2DtBFDBJF_kYEUVzxBOuONWABx3jN3979af0BNGRhsoHksBSEojCgAT_d505Khso-6w84ohN_gjGyADNHUGP_Xw8U5KIqODpyzBjJIjh5OGHMNJaxjJJoLTF8nTVPZLCuQmmSLQQnh6hC9_ljwPOdHBKRtgMby3jMrn55BhkEuC2lJd77Y690YS7R1OGvrapmQS_00DtOiSa0QPSNtlxD0jHu8133WHxDbad_VSu4Ls60pdlfpNBWNqtQepx_Q==" rel="nofollow" target="_blank" title="">https://www.globenewswire.com/NewsRoom/AttachmentNg/7554f2be-93cb-47c9-97a3-76e4a063f6c5</a> <img alt="" src='https://ml.globenewswire.com/media/ZTIxNzMyNjEtMjIzZC00NDI0LTk1NDctYzg5MThlMGMzMmVlLTExOTM1ODMtMjAyNi0wNy0xNS1lbg==/tiny/Fractyl-Health-Inc-.png' referrerpolicy='no-referrer-when-downgrade' />

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Fractyl Health Reports Positive Randomized Data from REMAIN-1 Midpoint Cohort Demonstrating Durable Weight Maintenance One Year After GLP-1 Discontinuation

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