ACM ▼ -0.1% - AECOM $ACM - AECOM selected to design Pure Water Silicon Valley demonstration facility AECOM was selected to design Pure Water Silicon Valley's demonstration facility, a project that supports the region's water sustainability efforts. The stock declined 0.1% today despite the contract award, suggesting investors may be awaiting further details on the project's scope or financial impact. 03-SEP-2026 07:04 AM ET