Seres Therapeutics CFO Marella Thorell to step down November 15, 2026
Seres disclosed in an SEC filing that Chief Financial Officer Marella Thorell will resign effective November 15, 2026, with a transition role expected to follow.
Seres Therapeutics, Inc. said in an 8-K filing dated October 22, 2026 that Marella Thorell, Executive Vice President and Chief Financial Officer of the company, resigned from her positions as Executive Vice President and Chief Financial Officer, effective November 15, 2026.1
The company said that after her resignation takes effect, Thorell is expected to help the company manage a smooth handover, under terms still to be worked out between her and the company.1
The filing was signed on October 26, 2026 by Thomas J. DesRosier, Chief Legal Officer and Executive Vice President of Seres Therapeutics.1 The document did not name a successor CFO or provide additional detail on the terms of Thorell's advisory arrangement.
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