Willdan Energy Solutions, Inc. /
Mantis Intermediate Holdings, LLC
Willdan Energy Solutions, Inc. signed an agreement for Mantis Intermediate Holdings, LLC.




Source for the buyer and target: Willdan Group, Inc.
For the buyer and target.
“On September 22, 2026, Willdan Energy Solutions, Inc. (“Energy Solutions”), a wholly owned subsidiary of Willdan Group, Inc. (“Willdan”), entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) with Mantis NewCo, LLC (“Seller”), pursuant to which Seller agreed to sell one hundred percent of the issued and outstanding equity securities (the “Subject Securities”) of Mantis Intermediate Holdings, LLC (the “Intermediate”) to Energy Solutions (the “Transaction”).”
Published 23 Sep 2026
Open the sourceWhat happened
The deal for Mantis Intermediate Holdings, LLC is signed, with Willdan Energy Solutions, Inc. as the buyer, at a stated price of $285,000,000. [01]
The filing from Willdan Group, Inc. is dated Sept. 23, 2026. [01]
The source
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Willdan Energy Solutions, Inc. signed an agreement for Mantis Intermediate Holdings, LLC.
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