Cooper's shares have seen a rise following Jana Partners' decision to build a stake in the company and advocate for changes. This development is significant as it indicates investor confidence and the potential for strategic improvements within Cooper, which could enhance its market position and drive future growth.

Activist investment firm Jana Partners has acquired a stake in Cooper, a prominent medical devices manufacturer. This move is significant as it highlights Jana's confidence in Cooper's potential for growth and innovation in the healthcare sector. With the increasing demand for advanced medical technologies, this investment could lead to strategic changes that enhance Cooper's market position and drive shareholder value.