WLDN ▼ -0.4% - Willdan Group, Inc. $WLDN Willdan to Acquire Mantis Innovation, Strengthening Its Position in Energy Management and Infrastructure Willdan Group announced it will acquire Mantis Innovation to expand its capabilities in energy management and infrastructure services. Despite the strategic move to strengthen its market position, the stock declined 0.4% today, suggesting investors may be weighing the acquisition's cost and integration risks against its long-term benefits. 22-SEP-2026 04:09 PM ET