RAIN ▲ +4.4% - Rain Enhancement Technologies Holdco, Inc. $RAIN - Rain Enhancement Technologies Announces Agreement with California Highway Patrol to Test Fog Mitigation Technology Rain Enhancement Technologies announced an agreement with the California Highway Patrol to test its fog mitigation technology, a potential validation of its core product offering and a step toward real-world deployment. The news likely drove investor optimism about commercialization prospects and regulatory acceptance, contributing to the stock's 4.4% gain. 01-SEP-2026 10:51 AM ET