Thirty cybersecurity-related merger and acquisition (M&A) deals were announced in December 2025. SecurityWeek has cataloged more than 420 M&A deals in 2025. A detailed report will be published in the coming weeks. Eight acquisitions involving pure-play cybersecurity firms exceeded $1 billion. Here are some of the most important cybersecurity M&A deals announced in December 2025: Cloud and security company Akamai has acquired serverless cloud provider Fermyon. Fermyon’s WebAssembly (Wasm) function-as-a-service is being combined with Akamai’s platform to enable enterprises to build edge-native applications with better performance and lower costs. Akamai also plans to deepen the integration between the edge functions platform and its performance and security products. Application security…