Rallybio Announces Acceptance of FNAIT Natural History Study Abstract for Presentation at the 65th American Society of Hematology Annual Meeting

Rallybio Corporation (Nasdaq: RLYB) today announced that an abstract for the Rallybio Fetal and Neonatal Alloimmune Thrombocytopenia (FNAIT) natural history study has been accepted for poster presentation at the upcoming 65th American Society of Hematology (ASH) Annual Meeting, which will be held December 9-12, 2023, in San Diego, California.

Details of the poster presentation are as follows:

Title: Identifying Pregnancies at Higher Risk for HPA-1a Alloimmunization and Fetal/Neonatal Alloimmune Thrombocytopenia (FNAIT): An International, Prospective, Natural History Study

Presenting Author: Emilie Vander Haar, M.D., Weill Cornell Medicine, New York-Presbyterian Hospital

Session Name: 311. Disorders of Platelet Number or Function: Clinical and Epidemiological: Poster I

Date/Time: Saturday, December 9, 2023, from 5:30 p.m. - 7:30 p.m. PT (8:30 p.m. - 10:30 p.m. ET)

Abstract #: 1224

The abstract is available on the ASH Annual Meeting website. Following presentation at the meeting, the poster will be accessible via the Publications and Presentations section of Rallybio’s website www.rallybio.com.

About Rallybio

Rallybio (NASDAQ: RLYB) is a clinical-stage biotechnology company with a mission to develop and commercialize life-transforming therapies for patients with severe and rare diseases. Rallybio has built a broad pipeline of promising product candidates aimed at addressing diseases with unmet medical need in areas of maternal fetal health, complement dysregulation, hematology, and metabolic disorders. The Company has two clinical stage programs: RLYB212, an anti-HPA-1a antibody for the prevention of fetal and neonatal alloimmune thrombocytopenia (FNAIT) and RLYB116, an inhibitor of complement component 5 (C5), with the potential to treat several diseases of complement dysregulation, as well as additional programs in preclinical development.

Rallybio is headquartered in New Haven, Connecticut with an additional facility at the University of Connecticut’s Technology Incubation Program in Farmington, Connecticut. For more information, please visit www.rallybio.com and follow us on LinkedIn and Twitter.

Forward-Looking Statements

This press release contains forward-looking statements that are based on our management’s beliefs and assumptions and on currently available information. All statements, other than statements of historical facts contained in this press release are forward-looking statements. In some cases, forward-looking statements can be identified by terms such as “may,” “will,” “should,” “expect,” “plan,” “anticipate,” “could,” “intend,” “target,” “project,” “contemplate,” “believe,” “estimate,” “predict,” “potential” or “continue” or the negative of these terms or other similar expressions, although not all forward-looking statements contain these words. Forward-looking statements in this press release include, but are not limited to, statements concerning results from the FNAIT natural history study, and expectations regarding the use of such results. The forward-looking statements in this press release are only predictions and are based largely on management’s current expectations and projections about future events and financial trends that management believes may affect Rallybio’s business, financial condition and results of operations. These forward-looking statements speak only as of the date of this press release and are subject to a number of known and unknown risks, uncertainties and assumptions, including, but not limited to, our ability to successfully initiate and conduct our planned clinical studies, including the FNAIT natural history study, the Phase 1b clinical study for RLYB212, and our planned Phase 2 and Phase 3 studies, and complete such clinical studies and obtain results on our expected timelines, or at all, whether our cash resources will be sufficient to fund our operating expenses and capital expenditure requirements and whether we will be successful raising additional capital, our ability to enter into strategic partnerships or other arrangements, competition from other biotechnology and pharmaceutical companies, and those risks and uncertainties described in Rallybio’s filings with the U.S. Securities and Exchange Commission (SEC), including Rallybio’s Quarterly Report on Form 10-Q for the period ended June 30, 2023, and subsequent filings with the SEC. The events and circumstances reflected in our forward-looking statements may not be achieved or occur and actual future results, levels of activity, performance and events and circumstances could differ materially from those projected in the forward-looking statements. Except as required by applicable law, we are not obligated to publicly update or revise any forward-looking statements contained in this press release, whether as a result of any new information, future events, changed circumstances or otherwise.

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