Amylyx Pharmaceuticals Appoints Bernhardt Zeiher, MD, FCCP, FACP, to its Board of Directors

- Dr. Zeiher brings more than 20 years of drug development experience in areas with serious unmet treatment needs at companies including Astellas Pharma, Pfizer, Eli Lilly and Company, and Merck

Amylyx Pharmaceuticals, Inc. (NASDAQ:AMLX) ("Amylyx" or the "Company") today announced the addition of Bernhardt G. Zeiher, MD, FCCP, FACP, to its Board of Directors ("Board"). Dr. Zeiher brings more than 20 years of drug development experience where, in his various roles, he oversaw the approval of 15 new treatments that addressed people's unmet needs in serious diseases with few to no treatment options. Most recently, he served as Chief Medical Officer ("CMO") of Astellas Pharma, where he led early- and late-stage drug development, medical and regulatory affairs, pharmacovigilance, and quality assurance.

"This is a pivotal time for Amylyx, and we are thrilled to welcome Dr. Zeiher to our Board to share his perspectives and expertise as the company continues to build a pipeline supporting our collective mission to one day end the suffering of neurodegenerative diseases," said George M. Milne, Jr., PhD, Chairman of Amylyx' Board. "Dr. Zeiher's insights of the intricacies and complexities of drug development and innovation in diseases with clear unmet need will be valuable as we continue to serve neurodegenerative disease communities impacted by these devastating diseases."

Dr. Zeiher is a recognized industry leader who spent more than 10 years at Astellas Pharma, holding multiple roles of increasing responsibility in the drug development division, leading up to his role as CMO from 2018 to 2022. Prior to his time at Astellas, Dr. Zeiher held various roles leading drug development at other pharmaceutical companies including Pfizer, Eli Lilly and Company, and Merck. Dr. Zeiher also practiced medicine at a tertiary medical center in Indianapolis and has held a range of board appointments since 2014, including positions at PhRMA Biomedical Advisory Committee, TransCelerate Biopharma, Biotechnology Innovation Organization, Astellas Global Health Foundation, and most recently, Entrada Therapeutics, which he joined in 2023.

"We are seeing a transformation in neurodegenerative diseases, both in potential new treatments and what we're learning through research, and I believe Amylyx is a catalyst in that change," said Dr. Zeiher. "The company's community-centric values, steadfast commitment to following the science, and beyond-therapy approaches and support for the neurodegenerative disease community are a few examples of why I am excited for the future and what we can accomplish to support those living with these devastating diseases and their loved ones."

"Dr. Zeiher brings to the Board his distinguished drug development background in overseeing the approval of 15 medicines, and his first-hand experience as a physician. On behalf of the entire Amylyx team, we are delighted to welcome him onboard as we continue to advance our mission to one day end the suffering caused by neurodegenerative diseases," said Joshua Cohen and Justin Klee, Co-CEOs of Amylyx. "We have several important milestones that we're working toward this year where Dr. Zeiher's expertise will be key, including our goal to bring our antisense oligonucleotide AMX0114, developed in-house, to the clinic for ALS, continuing to research the potential of AMX0035 in diseases like Wolfram syndrome and progressive supranuclear palsy, and sharing additional insights, learnings, and next steps from our Phase 3 PHOENIX trial in ALS."

Dr. Zeiher received a B.S. in biology from the University of Toledo and an MD from Case Western Reserve University School of Medicine. He completed his internal medicine residency and chief residency at University Hospitals of Cleveland and then finished his physician training as a Pulmonary and Critical Care Fellow at University of Iowa Hospitals and Clinics.

About Amylyx Pharmaceuticals

Amylyx Pharmaceuticals, Inc. is committed to supporting and creating more moments for the neurodegenerative disease community through the discovery and development of innovative new treatments. Amylyx is headquartered in Cambridge, Massachusetts and has operations in Canada, EMEA, and Japan. For more information, visit amylyx.com and follow us on LinkedIn and X, formerly known as Twitter. For investors, please visit investors.amylyx.com.

Forward-Looking Statements

Statements contained in this press release and related comments in our earnings conference call regarding matters that are not historical facts are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Such statements include, but are not limited to, the Company's expectations of contributions from its board of directors; the Company's beliefs regarding the benefits of AMX0035 in neurodegenerative diseases; expectations regarding the continued research of AMX0035 in progressive supranuclear palsy and Wolfram syndrome; the Company's potential announcement of additional insights, learnings, and next steps from the Phase 3 PHOENIX trial; the Company's expectations with respect to its progress through IND-enabling studies of AMX0114; the Company's expectations with respect to its early-stage ALS diagnostic test; and expectations regarding the Company's longer-term strategy. Any forward-looking statements in this press release are based on management's current expectations of future events and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by such forward-looking statements. Risks that contribute to the uncertain nature of the forward-looking statements include the risks and uncertainties set forth in Amylyx' filings with the Securities and Exchange Commission ("SEC"), including its Annual Report on Form 10-K for the year ended December 31, 2023, and subsequent filings with the SEC. All forward-looking statements contained in this press release speak only as of the date on which they were made. Subject to any obligations under applicable law, Amylyx undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made.

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