Q32 Bio Announces Upcoming Late-Breaking Presentation of Results from Part B of the SIGNAL-AA Clinical Trial of Bempikibart in Alopecia Areata at the European Academy of Dermatology and Venereology Congress 2026

-- Late-breaking oral and poster presentations to feature additional 36-week results and initial findings from the 16-week off-drug period from Part B of the SIGNAL-AA clinical trial of bempikibart in alopecia areata --

WALTHAM, Mass., Sept. 21, 2026 /PRNewswire/ -- Q32 Bio Inc. (Nasdaq: QTTB) ("Q32 Bio"), a clinical-stage biotechnology company focused on developing innovative therapies for alopecia areata ("AA") and other autoimmune and inflammatory diseases, today announced that additional 36-week results and initial findings from the 16-week off-drug period from Part B of the SIGNAL-AA Phase 2a clinical trial evaluating bempikibart in patients with severe or very severe AA will be featured across late-breaking oral and poster presentations at the European Academy of Dermatology and Venereology ("EADV") Congress, taking place September 30 – October 3, 2026 in Vienna, Austria. Bempikibart is a fully human anti-IL-7Rα antibody designed to re-regulate adaptive immune function by blocking IL-7 and TSLP signaling.

"Our late-breaking oral and poster presentations highlighting additional 36-week results as well as initial findings from the 16-week off-drug period from Part B of SIGNAL-AA underscores our commitment to bringing a differentiated, targeted therapeutic to patients with alopecia areata in need of new treatment options and the growing enthusiasm for bempikibart's unique mechanism in the field," said Jodie Morrison, Chief Executive Officer of Q32 Bio. "This recognition reinforces our conviction in our bempikibart development program in alopecia areata, as well as its potential in other autoimmune and inflammatory conditions, and we look forward to sharing our results with the scientific community."

The oral presentation details are as follows:

• Title: Bempikibart, a novel IL-7Rα antibody, produces hair regrowth that persists off treatment in severe and very severe alopecia areata: efficacy and biomarker results from the Phase 2a SIGNAL-AA Part B trial
• Abstract Number: LB-375
• Session: D1T01.1 – Late Breaking News
• Presenter: Arash Mostaghimi, MD, MPA, MPH, Associate Professor of Dermatology and Vice Chair of Clinical Trials and Innovation, Brigham and Women's Hospital, Harvard Medical School
• Date and Time: Wednesday, September 30, 2026, 3:15 p.m. CEST / 9:15 a.m. EST
• Location: Hall A

The poster presentation details are as follows:

• Title: Preliminary Results for an Open-label Phase 2a Trial (SIGNAL-AA Part B) of Bempikibart, a Novel IL-7Rα Antibody in Patients with Severe or Very Severe Alopecia Areata (AA)
• Abstract Number: AS-726
• Session: Biologics, immunotherapy, targeted therapy
• Presenter: Arash Mostaghimi, MD, MPA, MPH, Associate Professor of Dermatology and Vice Chair of Clinical Trials and Innovation, Brigham and Women's Hospital, Harvard Medical School
• Date and Time: Wednesday, September 30, 2026, 7:00 a.m. CEST / 1:00 a.m. EST
• Location: Poster Area

The presentations will be available in the "Presentations and Publications" section of the Q32 Bio website following the formal EADV presentation.

About Q32 Bio

Q32 Bio is a clinical-stage biotechnology company whose science targets potent regulators of the adaptive immune system to re-balance immunity and is focused on developing innovative therapies for alopecia areata and other autoimmune and inflammatory diseases. About 700,000 people in the United States live with alopecia areata¹, a disease which has a life-altering impact on patients and limited current treatment options. Q32 Bio is advancing bempikibart (ADX-914), a fully human anti-IL-7Rα antibody that re-regulates adaptive immune function, for the treatment of alopecia areata in an ongoing Phase 2 program. The IL-7 and TSLP pathways have been genetically and biologically implicated in driving several T cell-mediated pathological processes in numerous autoimmune diseases.

For more information, visit www.Q32Bio.com.

¹National Alopecia Areata Foundation

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Forward-Looking Statements

This communication contains forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, as amended, and other federal securities laws. Any statements contained herein which do not describe historical facts are forward-looking statements, including, among others, Q32 Bio's beliefs, observations, expectations and assumptions regarding additional 36-week results and initial findings from the 16-week off-drug period from Part B of the SIGNAL-AA Phase 2a clinical trial and the anticipated timing of its data, the safety, tolerability, clinical activity including biomarker data, potential efficacy and potential benefits of bempikibart including plans and expectations for Part B of the SIGNAL-AA Phase 2a clinical trial,  the expectations surrounding the potential, safety, efficacy, and regulatory and clinical progress of Q32 Bio's product candidates, including bempikibart, and anticipated milestones, and Q32 Bio's beliefs, expectations and assumptions regarding the future of its business, future plans and strategies; which involve risks and uncertainties that could cause actual results to differ materially from those discussed in such forward-looking statements.

Forward-looking statements are based on management's current beliefs and assumptions, which are subject to risks and uncertainties and are not guarantees of future performance. Such risks and uncertainties include, among others, the risk that additional data, or the results of ongoing data analyses, may not support Q32 Bio's current beliefs and expectations for bempikibart, including with respect to the durability of clinical responses, the risk that ongoing and future clinical studies might be more costly than expected or might not yield anticipated results, that Q32 Bio may use its capital resources sooner than currently anticipated, our expectations regarding the sufficiency of our cash and cash equivalents to provide financial runway and that we may need additional funding to complete clinical studies, which may not be available on favorable terms or at all and such other risks and uncertainties identified in Q32 Bio's periodic, current and other filings with the SEC, including its Annual Report on Form 10-K for the year ended December 31, 2025 and any subsequent filings with the SEC, which are available at the SEC's website at www.sec.gov. Any such risks and uncertainties could materially and adversely affect Q32 Bio's results of operations and its cash flows, which would, in turn, have a significant and adverse impact on Q32 Bio's stock price. Q32 Bio cautions you not to place undue reliance on any forward-looking statements, which speak only as of the date they are made. Q32 Bio disclaims any obligation to publicly update or revise any such statements to reflect any change in expectations or in events, conditions or circumstances on which any such statements may be based, or that may affect the likelihood that actual results will differ from those set forth in the forward-looking statements.

Contacts

Investors: Brendan Burns
Senior Director, Investor Relations and Corporate Communications
Q32 Bio
[email protected]

Media: David Rosen
Argot Partners
646.461.6387
[email protected]

SOURCE Q32 Bio