Legend Biotech Announces Late-Breaking Oral Presentation at EHA 2026 Showcasing Initial Phase 1 In Vivo CAR-T Data with LB2501 in Non-Hodgkin Lymphoma (NHL)

• Promising Phase 1 data for LB2501, a potential first*‑in‑class CD19/CD20 dual‑targeting in vivo CAR-T therapy, as an off-the-shelf, single-infusion treatment for B‑*cell malignancies
• An ORR of 100% (6/6) was observed in the dose level 2 cohort, including CR rate of 83.3% (5/6) in patients with relapsed/ refractory NHL
• Data demonstrate robust in vivo CAR-T expansion without lymphodepleting chemotherapy
• Favorable safety profile: no DLTs, no SAEs, no ICANS, CRS *<*Grade 2

BRIDGEWATER, N.J., June 02, 2026 — Legend Biotech Corporation (NASDAQ: LEGN) (Legend Biotech or the Company), a global leader in cell therapy, today announced that promising preliminary clinical data for LB2501, its investigational in vivo CD19/CD20 dual-targeting CAR-T cell therapy, in patients with relapsed/refractory B-cell non-Hodgkin lymphoma (R/R B-NHL), will be presented during a late-breaking session at the European Hematology Association (EHA) 2026 Congress, taking place June 11-14, 2026, in Stockholm, Sweden.

“The upcoming presentation of Phase 1 LB2501 data in patients with B-cell malignancies represents an important step in advancing in vivo CAR-T approaches,” said Ying Huang, Ph.D., Chief Executive Officer of Legend Biotech. “By generating CAR-T cells directly within the patient, this approach has the potential to simplify treatment delivery and expand access for patients who may not be able to receive traditional CAR-T cell therapies. LB2501 is built on the TaVec™ platform, which is a proprietary lentiviral vector engineered to enhance T-cell specificity, transduction efficiency, and safety, while restricting transduction of non-T cells.”

LB2501: Promising Phase 1 Trial of In Vivo CAR-T Data Demonstrate High Response Rates in B-cell Malignancies

Data from 12 patients across two dose cohorts in an ongoing Phase 1 study evaluating LB2501 in patients with R/R B-NHL provide early clinical evidence supporting the potential of an in vivo CAR-T approach in B-cell malignancies. LB2501 is designed to generate CAR-T cells directly within the patient following a single intravenous infusion, eliminating the need for cell manufacturing and lymphodepletion.

As of April 1, 2026, 12 patients with R/R B-NHL were treated across two dose levels (DL1 and DL2). Additional details will be presented at EHA 2026. Key findings from the abstract include:

Efficacy Results

• At DL2 (median follow-up for DL2 was 2.2 months [range, 2.0 to 3.8]) Objective response rate (ORR): 100% (6/6)Complete response rate (CR): 83.3% (5/6)All responses were ongoing at data cutoff

Pharmacokinetics

• Dose-dependent in vivo CAR-T expansion observed
• CAR-T cells detected in peripheral blood for up to 116 days

Safety Results

• No dose-limiting toxicities (DLTs), serious adverse events (SAEs), or deaths were observed
• Infusion-related reactions occurred in 75% of patients, all of which were ≤ Grade 2
• Cytokine release syndrome (CRS) occurred in 66.7% of patients, all of which were ≤ Grade 2
• No immune effector cell-associated neurotoxicity syndrome (ICANS) was reported
• Grade ≥3 lentiviral vector-related and CAR-T-related adverse events were limited to decreased lymphocyte count and decreased neutrophil count

EHA Presentation (June 11-14, 2026)

Abstract No.

Title

Information

Abstract #LB5006 Late-Breaking Oral Presentation

First-in-human trial of LB2501, an in vivo CD19/CD20 dual targeting CAR-T therapy, in relapsed/refractory B-Cell NHL

Session ID: s204 Date/Time: Sunday, June 14, 2026, 9:15-10:45 AM CEST Location: Nobel Hall

About Lb2501

LB2501 is an investigational, potential first-in-class CD19/CD20 dual-targeting in vivo CAR-T therapy designed to generate CAR-T cells directly within the patient following a single intravenous infusion. It is being evaluated in an ongoing Phase 1, open-label study NCT07002112) in patients with relapsed/refractory B-cell malignancies to assess safety, tolerability, and preliminary efficacy.i

About B-cell Non-hodgkin Lymphoma

Non-Hodgkin lymphoma (NHL) is a group of cancers that originate in lymphocytes, a type of white blood cell that plays a key role in the body’s immune system.ii B-cell lymphomas account for approximately 85% of NHL cases and arise from abnormal growth of B lymphocytes (B cells), which are responsible for producing antibodies. These malignancies include a range of subtypes that vary in aggressiveness, from slow-growing to highly aggressive disease.iii

About Legend Biotech

With over 3,000 employees, Legend Biotech is the largest standalone cell therapy company and a pioneer in treatments that change cancer care forever. Legend Biotech is at the forefront of the CAR-T cell therapy revolution with CARVYKTI®, a one-time treatment for relapsed or refractory multiple myeloma, which it develops and markets with collaborator Johnson & Johnson. Centered in the United States, Legend Biotech is building an end-to-end cell therapy company by expanding its leadership to maximize CARVYKTI’s patient access and therapeutic potential. From this platform, Legend Biotech plans to drive future innovation across its pipeline of cutting-edge cell therapy modalities.

Learn more at https://legendbiotech.com and follow us on X, Instagram,and LinkedIn.

INVESTOR CONTACT

Jessie Yeung Tel: (732) 956-8271 [email protected]

PRESS CONTACT

Kim Fox Tel: (848) 388-8445 [email protected]

i ClinicalTrials.Gov. The CD19/CD20 Dual-Target in Vivo CAR-T Lentiviral Product in the Treatment of Relapsed/Refractory B-cell Malignancies. https://clinicaltrials.gov/study/NCT07002112. Accessed May 2026 ii American Cancer Society. “What Is Non-Hodgkin Lymphoma?”. Available at: https://www.cancer.org/cancer/types/non-hodgkin-lymphoma/about/what-is-non-hodgkin-lymphoma.html.Accessed May 2026. iii American Cancer Society. “Types of B-cell Lymphoma.” Available at: https://www.cancer.org/cancer/types/non-hodgkin-lymphoma/about/b-cell-lymphoma.html.Accessed May 2026.