On September 9, 2026 Prothena Corporation plc (NASDAQ:PRTA), a late-stage clinical biotechnology company with a robust pipeline of investigational therapeutics built on protein dysregulation expertise, reported that members of its senior management team will participate in a fireside chat at the H.C. Wainwright 28th Annual Global Investment Conference on Wednesday, September 16, 2026 at 8:30 a.m. ET in New York, NY.

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A live webcast of the fireside chat can be accessed through the investor relations section of the Company’s website at www.prothena.com. Following the live presentation, a replay of the webcast will be available on the Company’s website for 90 days following the presentation date.

(Press release, Prothena, SEP 9, 2026, View Source;Wainwright-28th-Annual-Global-Investment-Conference/default.aspx [SID1234670681])