Spyre Therapeutics to Host Conference Call to Report SPY001 Part A Induction Topline Results from SKYLINE Trial in Moderate-to-Severe Ulcerative Colitis Patients on April 13, 2026

Spyre Therapeutics, Inc. (NASDAQ: SYRE), a clinical-stage biotechnology company pioneering long-acting antibodies and antibody combinations to redefine the standard of care for inflammatory bowel disease (IBD) and rheumatic diseases, today announced it will report SPY001 Part A induction topline results from the SKYLINE trial in moderate-to-severely active ulcerative colitis patients on Monday, April 13, 2026. Following the announcement, the Company will host a conference call and webcast at 8:00am ET on Monday April 13, 2026 to discuss the results.

To access the live and archived webcast, please visit the Investor Relations page of Spyre’s website at https://ir.spyre.com/events-and-presentations .

About Spyre Therapeutics

Spyre Therapeutics is a clinical-stage biotechnology company pioneering long-acting antibodies and antibody combinations to redefine the standard of care for inflammatory bowel disease (“IBD”) and rheumatic diseases. Spyre's pipeline includes investigational extended half-life antibodies targeting α4β7, TL1A, and IL-23.

For more information, visit Spyre's website at www.spyre.com .

For Investors: Eric McIntyre, Spyre Therapeutics SVP of Finance and Investor Relations [email protected]

For Media: Josie Butler, 1AB [email protected]