Xeris names CEO John Shannon as Board Chair effective July 1, 2026
Xeris Biopharma Holdings named CEO John Shannon as Board Chair effective July 1, 2026, while Marla Persky moves to Lead Independent Director. The Board also appointed Dr. Nerissa Kreher, expanding its size to eight members.

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Xeris Biopharma Holdings, Inc. has appointed Chief Executive Officer John Shannon as Chair of the Board, effective July 1, 2026. The company also announced that Marla Persky will transition to the role of Lead Independent Director while remaining on the Board. Additionally, the Board appointed Nerissa Kreher, M.D., as a new director, expanding the total membership to eight members.
The leadership changes follow a review of the company's strategic direction over the past two years. Marla Persky stated that the Board initially wanted Mr. Shannon to focus on strategy and growth upon his appointment as CEO. She noted that his demonstrated leadership and vision make him the ideal person to now serve as chairman.
Mr. Shannon expressed confidence in the company's future, citing the continued rapid growth of its commercial portfolio and the advancement of its late-stage pipeline. He also thanked Marla Persky for her service as chairperson and highlighted her continued value as a thought partner and advisor in her new role.
New Board Appointment
The Board welcomed Dr. Nerissa Kreher, an accomplished physician-scientist and biotech executive. Mr. Shannon cited her experience in developing and commercializing therapies for rare diseases across neuromuscular, endocrinology, and metabolic disorders as a significant asset to the company.
Dr. Kreher currently serves as Chief Medical Officer of Alltrna, leading clinical development, regulatory, and patient advocacy. Her previous roles include Chief Medical Officer positions at Entrada Therapeutics, Tiburio Therapeutics, and AVROBIO. She also serves as an independent board director of Rezolute Bio.
Xeris Board Composition
| Name | Role | Effective Date |
|---|---|---|
| John Shannon | Chair of the Board and CEO | July 1, 2026 |
| Marla Persky | Lead Independent Director | July 1, 2026 |
| Nerissa Kreher, M.D. | Director | July 1, 2026 |
Xeris is a biopharmaceutical company focused on developing and commercializing innovative products. Its commercial portfolio includes Recorlev®, Gvoke®, and Keveyis®.
How will the consolidation of the CEO and Chair roles impact Xeris' corporate governance and decision-making speed?
What specific strategic initiatives will John Shannon prioritize following his appointment as Chair?
How will Dr. Kreher's expertise in rare diseases influence Xeris' pipeline development and commercialization efforts?


























