---
title: "Gossamer Bio’s Seralutinib Future in Doubt After PROSERA Miss in PAH Raises FDA, Funding and Viability Risks"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/279737949.md"
description: "Gossamer Bio faces significant uncertainty regarding its seralutinib program after the PROSERA trial failed to meet its primary endpoint in pulmonary arterial hypertension (PAH). The FDA may require additional studies, which could delay approval and increase costs. This situation raises concerns about the company's ability to secure funding and maintain the viability of its business. Despite these challenges, the average stock price target for GOSS is $3.69, suggesting a potential upside of 750.03%."
datetime: "2026-03-19T06:00:44.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/279737949.md)
  - [en](https://longbridge.com/en/news/279737949.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/279737949.md)
---

> Supported Languages: [简体中文](https://longbridge.com/zh-CN/news/279737949.md) | [繁體中文](https://longbridge.com/zh-HK/news/279737949.md)


# Gossamer Bio’s Seralutinib Future in Doubt After PROSERA Miss in PAH Raises FDA, Funding and Viability Risks

Gossamer Bio (GOSS) has disclosed a new risk, in the Innovation / R&D category.

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Gossamer Bio faces significant uncertainty after PROSERA’s failure to meet its primary endpoint in PAH, as the FDA may deem the existing seralutinib dataset inadequate for approval and demand additional costly and time‑consuming studies. Any delay, dead‑end development path, or inability to raise sufficient capital would materially undermine the value and viability of its seralutinib program and overall business prospects.

The average GOSS stock price target is $3.69, implying 750.03% upside potential.

To learn more about Gossamer Bio’s risk factors, click here.

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