Seres Therapeutics to Host Fourth Quarter and Full Year 2018 Financial Results and Operational Progress Conference Call and Webcast on March 6, 2019

Seres Therapeutics, Inc. MCRB today announced that management will host a conference call and live audio webcast on March 6, 2019 at 8:30 a.m. ET to discuss fourth quarter and full year 2018 results and provide a general business update.

To access the conference call, please dial 844-277-9450 (domestic) or 336-525-7139 (international) and reference the conference ID number 6566237. To join the live webcast, please visit the "Investors and Media" section of the Seres website at www.serestherapeutics.com.

A webcast replay will be available on the Seres website beginning approximately two hours after the event and will be archived for approximately 21 days.

About Seres Therapeutics

Seres Therapeutics, Inc. MCRB is a leading microbiome therapeutics platform company developing a novel class of biological drugs that are designed to treat disease by restoring the function of a dysbiotic microbiome, where the state of bacterial diversity and function is imbalanced. Seres' most advanced program, SER-109, has obtained Breakthrough Therapy and Orphan Drug designations from the U.S. Food and Drug Administration and is in Phase 3 development for recurrent C. difficile infection. SER-287 is being evaluated in a Phase 2b study in patients with active mild-to-moderate ulcerative colitis. Seres is also advancing SER-401 into clinical development to augment the efficacy of current immuno-oncology treatments. For more information, please visit www.serestherapeutics.com.

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