On May 12, 2026 Agios Pharmaceuticals, Inc. (Nasdaq: AGIO), a commercial-stage biopharmaceutical company focused on delivering innovative medicines for patients with rare diseases, reported that new data on mitapivat, an oral pyruvate kinase (PK) activator, will be featured in oral and poster presentations during the 31st European Hematology Association (EHA) (Free EHA Whitepaper) Congress (EHA 2026) in Stockholm, Sweden, June 11-14, 2026.
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"Our presentations at EHA (Free EHA Whitepaper) 2026 build on over a decade of clinical and preclinical research that has consistently demonstrated the transformative potential of mitapivat as a disease-modifying oral medicine for hemolytic anemias, including sickle cell disease and thalassemia," said Sarah Gheuens, M.D., Ph.D., Chief Medical Officer and Head of R&D, Agios. "The plenary session for our RISE UP Phase 3 trial is an important opportunity to present new data showcasing the strong anti-hemolytic profile of mitapivat and its potential to address the urgent need for novel therapeutic options in sickle cell disease. We look forward to sharing these results and engaging with the hematology community as we continue to drive meaningful progress for patients with rare blood diseases."
Select presentations at EHA (Free EHA Whitepaper) 2026 will include:
An oral presentation during the Plenary Abstracts Session on detailed efficacy and safety data from the global 52-week, randomized, double-blind, placebo-controlled RISE UP Phase 3 trial of mitapivat in patients aged 16 years or older with sickle cell disease. Results demonstrate that treatment with mitapivat significantly improved hemoglobin response (a ≥1.0 g/dL increase from baseline in average hemoglobin from Week 24 through Week 52) and reduced markers of hemolysis (red blood cell destruction). Additional analyses, including measures of clinical benefit and patient-reported outcomes that were not previously disclosed in the company’s November 2025 topline report, will also be presented. The RISE UP abstract was one of only six selected for this distinguished plenary session from thousands of submissions.
An oral presentation on long-term data from the ENERGIZE Phase 3 trial of mitapivat in adult patients with non-transfusion-dependent alpha- or beta-thalassemia. Of the 192 patients who received at least one dose of mitapivat or placebo in the double-blind period of ENERGIZE, 95% (n=182) opted to transition into the corresponding open-label extension (OLE) period, during which all patients receive mitapivat. The results show the durability of mitapivat treatment, with clinically meaningful hemoglobin improvements sustained for up to 127 weeks across the double-blind and OLE periods. During the OLE, nearly half (n=30/61) of non-responders who switched from placebo achieved a hemoglobin improvement (a ≥1 g/dL increase from baseline in average hemoglobin during any two consecutive OLE study visits), supporting a consistent treatment effect with mitapivat. Additionally, about one-third (n=23/68) of non-responders who received mitapivat during the double-blind period achieved a hemoglobin improvement during the OLE, suggesting a potential benefit of continued long-term treatment.
A related poster will highlight a subset of patients with higher baseline hemoglobin levels (≥9.5 g/dL) in ENERGIZE. Among these patients, 38.9% (n=7/18) in the mitapivat arm achieved a hemoglobin response (a ≥1 g/dL increase from baseline in average hemoglobin from Week 12 through Week 24) in the double-blind period, compared with 0% (n=0/11) in the placebo arm. Additionally, patients in the mitapivat arm showed a 5.1-point improvement in patient-reported fatigue scores compared with 0.8 points among those in the placebo arm, as measured by the least squares mean change from baseline in Functional Assessment of Chronic Illness Therapy (FACIT)-Fatigue from Week 12 to Week 24.
An oral presentation on the collaborator-led SATISFY Phase 2 trial of mitapivat in 24 patients with one of three rare hemolytic anemias: hereditary spherocytosis, hereditary xerocytosis, or congenital dyserythropoietic anemia type II. Treatment resulted in sustained hemoglobin improvements over 56 weeks. Notably, patients who achieved a hemoglobin response (a ≥1 g/dL increase from baseline in average hemoglobin during at least two consecutive study visits) also showed significant decreases in liver iron content, an important marker of downstream complications in hemolytic anemias.
In total, 10 presentations and publications led by Agios and external collaborators will be shared at EHA (Free EHA Whitepaper) 2026.
EHA 2026 Accepted Abstracts
Title Number Date/Time Presenter Acceptance
Sickle Cell Disease
Efficacy and Safety of Mitapivat in Sickle Cell Disease: Results From the Global, Randomized, Phase 3 RISE UP Trial S102 Saturday, June 13, 12:00 – 1:30 p.m. CEST Biree Andemariam, M.D., University of Connecticut Health Oral Plenary Session
Metabolic Profiles Associated With Point of Sickling Reflect Immunoregulation, Oxidative Stress, and Compensatory Mechanisms in Patients With Sickle Cell Anemia PF1264 Friday, June 12, 6:45 – 7:45 p.m. CEST
Amira Idrizovic, Ph.D., Vall d’Hebron Research Institute, Barcelona, Spain Poster
Impaired Function of Pyruvate Kinase Is Associated With Hemolysis‑Related Inflammation, Ineffective Erythropoiesis, and Endothelial Dysfunction in Adults With Sickle Cell Anemia PF1269 Friday, June 12, 6:45 – 7:45 p.m. CEST Marissa J.M. Traets, M.D., University Medical Center Utrecht, Netherlands Poster
Thalassemia
Long‑Term Hemoglobin Improvements in Non-Transfusion‑Dependent Alpha‑ or Beta‑Thalassemia: Results From the Open‑Label Extension of the Ongoing Phase 3 ENERGIZE Trial S440 Saturday, June 13, 5:15 – 6:30 p.m. CEST Hanny Al‑Samkari, M.D., Mass General Brigham Cancer Institute
Oral
Efficacy of Mitapivat in Patients With Non-Transfusion‑Dependent Alpha‑ or Beta‑Thalassemia With Baseline Hemoglobin ≥9.5 g/dL: Subgroup Analysis From the Phase 3 ENERGIZE Trial PF1281 Friday, June 12, 6:45 – 7:45 p.m. CEST Khaled M. Musallam, M.D., Ph.D., Burjeel Medical City, Abu Dhabi, United Arab Emirates
Poster
ENERGIZEKIDS: Mitapivat in Pediatric Patients With Non-Transfusion‑Dependent Alpha‑ or Beta‑Thalassemia PB4160 N/A Kathryn Dickerson, M.D., University of Texas Southwestern Medical Center
Publication
ENERGIZEKIDS‑T: Mitapivat in Pediatric Patients With Transfusion‑Dependent Alpha‑ or Beta‑Thalassemia PB4162 N/A Janet Kwiatkowski, M.D., MSCE, Children’s Hospital of Philadelphia Publication
Other
The Patient Experience of Fatigue in Individuals With Sickle Cell Disease, Thalassemia, and Pyruvate Kinase Deficiency PB4417 N/A Biree Andemariam, M.D., University of Connecticut Health Publication
Effects of Mitapivat on Iron Burden and Spleen Size in Erythrocyte Membranopathies and Congenital Dyserythropoietic Anemia Type II: 56‑Week Follow‑Up Results From the SATISFY Study S304 Thursday, June 11, 4:45 – 6:00 p.m. CEST Thomas Doeven, M.D., University Medical Center Utrecht, Netherlands Oral
Diamond‑Blackfan Anemia Syndrome Erythroid Progenitors Display Abnormal Metabolic Profile PS1781 Saturday, June 13, 6:45 – 7:45 p.m. CEST Veronica Riccardi, M.D., University of Verona, Italy Poster
Please refer to the EHA (Free EHA Whitepaper) 2026 online program for full session details and data presentation listings, and visit the Agios booth (#A1.04) onsite.
EHA 2026 Investor Event
Agios will host a conference call and live webcast during the EHA (Free EHA Whitepaper) 2026 congress on Saturday, June 13, at 9:00 a.m. ET (3:00 p.m. CEST). The live webcast will be accessible on the Investors section of the company’s website (www.agios.com) under the "Events & Presentations" tab. A replay of the webcast will be available on the company’s website approximately two hours after the event.
(Press release, Agios Pharmaceuticals, MAY 12, 2026, View Source [SID1234665519])