Willdan completes $285 million cash acquisition of Mantis Innovation

Willdan Group Inc. closed a cash purchase of Mantis Innovation for $285 million, after HSR antitrust clearance and customary closing conditions. The deal adds building‑energy management and efficiency services to Willdan’s portfolio. Willdan will discuss the transaction and update its financial guidance during its Q3 earnings call on November 5, 2026.

The acquisition will be reflected in Willdan’s third‑quarter results and may alter its revenue and margin outlook, which investors will learn about when the company provides updated guidance on November 5, 2026.

  • 1Willdan paid $285 million in cash for Mantis Innovation, subject to customary holdbacks and adjustments.
  • 2The transaction closed after the Hart‑Scott‑Rodino waiting period expired and closing conditions were satisfied.
  • 3Jefferies LLC acted as exclusive financial advisor to Mantis.
  • 4Mike Bieber is Willdan’s CEO and Darrell Whitley is Mantis Innovation’s CEO.
  • 5Willdan will provide additional details and updated financial guidance during its Q3 earnings conference call on November 5, 2026.

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