# Seres Therapeutics (MCRB) — Overview

MCRB · NASDAQ · Stock

Canonical page: https://www.lighthorse.io/tickers/mcrb

## Price

Last close $2.53 on Oct 15, 2026. 52-week range $2.42 – $28.63.

## Company profile

Seres Therapeutics Inc is a clinical-stage biotechnology company focused on the development of live biotherapeutic candidates. Its pipeline includes candidates such as SER-155 and SER-603, aimed at preventing and treating bacterial infections, antimicrobial resistance, and gastrointestinal immune diseases. The company operates as a single reportable segment, mainly developing microbiome-based therapies targeting bacterial infections, antimicrobial resistance, and gastrointestinal immune diseases.

## Frequently Asked Questions

### How do I buy stock in Seres Therapeutics (MCRB)?

MCRB trades commission-free with a Light Horse Securities brokerage account — from the mobile app, the web at [Light Horse Dashboard](https://portal.lighthorse.io), the trading API, or an [AI agent connected over MCP](/instructions/ai/claude). The trade panel on this page places the order once you are signed in.

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