Adobe said Wednesday that it reached a deal to acquire search engine marketing platform Semrush for $1.9 billion to boost its tools for marketers in the age of artificial intelligence . Semrush shares skyrocketed more than 70%, while Adobe fell about 2%. The design software firm said it will pay $12 a share for Semrush in an all-cash transaction. The deal is expected to close during the first half of 2026. Semrush, which offers search engine optimization tools to marketers, went public in 2021.