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Get filing alertsWilldan to acquire Mantis Intermediate Holdings for $285M, closing expected Oct 30
Filed September 23, 2026 · Period ending September 22, 2026 · ~1 min read
Key Changes
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Willdan Energy Solutions agreed to buy 100% of Mantis Intermediate Holdings for a $285M base cash price, subject to working capital and other adjustments.
Item 1.01 verify on EDGAR → -
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Willdan Group provides a full, unconditional guarantee of its subsidiary's obligations under the purchase agreement, putting its balance sheet behind the deal.
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Closing is expected October 30, 2026, subject to HSR antitrust clearance and other customary conditions.
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Buyer has secured representations and warranties insurance, a common deal-protection mechanism that shifts some post-closing risk to an insurer.
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Summary
Willdan Group announced that its wholly owned subsidiary, Willdan Energy Solutions, has agreed to acquire Mantis Intermediate Holdings for a base purchase price of $285 million in cash. The deal is expected to close on October 30, 2026, subject to HSR antitrust clearance and other customary conditions.
Willdan, the parent company, is providing a full and unconditional guarantee of its subsidiary's obligations, which means Willdan's balance sheet is directly exposed to the transaction. For retail investors, this is a significant acquisition that expands Willdan's business. The $285 million price tag is material relative to Willdan's size, and the parent guarantee underscores the company's commitment to the deal.
The use of representations and warranties insurance is a standard mechanism that can reduce post-closing risk, but it does not eliminate all risks associated with the acquisition. Investors should note that the transaction is not yet complete and remains subject to regulatory approval and other closing conditions.
Section-by-Section Diff
Event · Item 1.01 — Entry into a Material Definitive Agreement
Item 1.01 — Entry into a Material Definitive Agreement filed; see Key Changes for terms.
Added in current filing · verify on EDGAR →
the Closing will occur on October 30, 2026, or the third business day after all closing conditions are satisfied or waived
The transaction is expected to close on October 30, 2026, or shortly after all conditions are met. Closing is subject to HSR antitrust clearance, accuracy of representations and warranties, and absence of legal prohibitions.
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Figures/quotes linked to EDGAR · Narrative written by AI · Oct 3, 2026 · How we verify