Agreement signedPublished 23 Sep 2026

Willdan Energy Solutions, Inc. /
Mantis Intermediate Holdings, LLC

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

Buy side: Willdan Energy Solutions, Inc.
Buy sideWilldan Energy Solutions, Inc.
Target: Mantis Intermediate Holdings, LLC
TargetMantis Intermediate Holdings, LLC
Willdan Group, Inc. · 23 Sep 2026Source
Buy side: Willdan Energy Solutions, Inc.
Buy sideWilldan Energy Solutions, Inc.
Target: Mantis Intermediate Holdings, LLC
TargetMantis Intermediate Holdings, LLC
01 / BuyerWilldan Energy Solutions, Inc.
02 / TargetMantis 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

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01

What 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]

02

The source

Everything on this page comes from the source below, quoted word for word.

01
Source · Willdan Group, Inc.

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

This document is the source for the companies, stage and people on this page.

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03

Timeline

Every date the source states, in order, each with the words it comes from. Anything marked ahead is a target the source gives, not something that has happened.

  1. Announced

    “The filing from Willdan Group, Inc. is dated Sept. 23, 2026”

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  2. Published by Willdan Group, Inc.

    The source this page is built from.

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