---
title: "Compass Therapeutics Collapses Over 56% as Cancer Drug Fails Survival Endpoint"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/284239851.md"
description: "Compass Therapeutics (CMPX.US) current price $2.20, down -56.22% for the day, with a 5-minute decline exceeding -3%, and at one point during the session, the decline approached 68%, setting a record for the largest single-day drop in history. The core pipeline drug of the tumor-targeted therapy company Compass Therapeutics failed to meet the primary endpoint for overall survival in clinical trials. Following the announcement of the trial failure, the stock price gapped down and continued to decline. This clinical data setback directly undermines market expectations for the value of the company's core assets. Without support from other mature pipelines, there is significant pressure for the stock price to recover in the short term. Investors will closely monitor whether the company initiates pipeline adjustments or strategic restructuring in the future"
datetime: "2026-04-27T15:02:37.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/284239851.md)
  - [en](https://longbridge.com/en/news/284239851.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/284239851.md)
generator: "portal-rs"
---

# Compass Therapeutics Collapses Over 56% as Cancer Drug Fails Survival Endpoint

Compass Therapeutics (CMPX.US) traded at $2.20, down **56.22%** intraday, with 5-minute losses breaching the -3% threshold; shares dropped as much as 68% at the open, setting a record single-day decline for the stock.

The oncology-focused biopharmaceutical company announced that its lead pipeline candidate failed to meet the primary overall survival endpoint in a clinical trial, triggering an immediate and severe market reaction. With no other mature pipeline assets to offset the loss of its lead program, near-term recovery prospects appear limited; investors will be watching closely for any announcement regarding pipeline restructuring or strategic alternatives.

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- [CMPX.US](https://longbridge.com/en/quote/CMPX.US.md)

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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**