Energy Recovery is trading at $7.19, up 5.12%, with its October 8 contract announcement the clearest company-specific catalyst. - The agreement calls for supplying its highest-capacity PX Q650 devices to a major Saudi seawater desalination plant expected to rank among the world’s ten largest; it preceded the after-hours move. - Contract value and other financial terms were not disclosed. No separate October 9 company update was found. - Broader market gains may also have supported sentiment.