Execution Version

AMENDMENT NO. 9 TO CREDIT, SECURITY AND GUARANTY AGREEMENT

This AMENDMENT NO. 9 TO CREDIT, SECURITY AND GUARANTY AGREEMENT (this

“Agreement”) is made as of this 8th day of May, 2026 (the “Ninth Amendment Effective Date”), by and among SHIMMICK CONSTRUCTION COMPANY, INC., a California corporation (“Shimmick”), RUST CONSTRUCTORS INC., a Delaware corporation, THE LEASING CORPORATION, a Nevada corporation, AXIA ELECTRIC LLC, a Delaware limited liability company (collectively, the “Borrowers” and each individually, a “Borrower”), SHIMMICK CORPORATION (f/k/a SCCI National Holdings, Inc.), a Delaware corporation (“Holdings”), ALTER DOMUS (US) LLC, a Delaware limited liability company, as Agent, and the financial institutions or other entities parties hereto, each as a Lender.

RECITALS

Agent, Lenders, Borrowers and Holdings have entered into that certain Credit, Security and Guaranty Agreement, dated as of May 20, 2024, as amended by that certain Amendment No. 1 to Credit, Security and Guaranty Agreement, dated as of September 25, 2024, Amendment No. 2 to Credit, Security and Guaranty Agreement, dated as of January 30, 2025, Amendment No. 3 and Limited Waiver to Credit, Security and Guaranty Agreement, dated as of March 12, 2025, Amendment No. 4 to Credit, Security and Guaranty Agreement, dated as of March 31, 2025, Amendment No. 5 to Credit Security and Guaranty Agreement, dated as of May 12, 2025, Amendment No. 6 to Credit, Security and Guaranty Agreement, dated as of August 8, 2025, Amendment No. 7 to Credit, Security and Guaranty Agreement, dated as of October 31, 2025 and Amendment No. 8 to Credit, Security and Guaranty Agreement, dated as of March 9, 2026, and as supplemented by that certain Joinder No. 1 to Credit, Security and Guaranty Agreement, dated as of July 31, 2025 (as amended, the “Existing Credit Agreement” and as amended hereby and as it may be further amended, modified, supplemented and restated from time to time, the “Credit Agreement”), pursuant to which the Lenders have agreed to make certain advances of money and to extend certain financial accommodations to Borrowers in the amounts and manner set forth in the Credit Agreement.

Borrowers and Holdings have requested, and Agent and all Lenders have agreed, to amend certain provisions of the Existing Credit Agreement, in each case, in accordance with the terms and subject to the conditions set forth herein.

AGREEMENT

NOW, THEREFORE, in consideration of the foregoing, the terms and conditions set forth in this Agreement, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Agent, Lenders, Borrowers and Holdings hereby agree as follows:

Recitals. This Agreement shall constitute a Financing Document and the Recitals and each reference to the Credit Agreement, unless otherwise expressly noted, will be deemed to reference the Credit Agreement as amended hereby. Capitalized terms used but not otherwise defined herein shall have the meanings ascribed to them in the Credit Agreement (including those capitalized terms used in the Recitals hereto).

Amendments to Existing Credit Agreement. Subject to the terms and conditions of this Amendment, including, without limitation, the satisfaction of the conditions set forth in Section 4 hereof, the Existing Credit Agreement is hereby amended as follows:

(a)

Section 1.1 of the Existing Credit Agreement is hereby amended to add the following definition in the appropriate alphabetical order therein:

“Ninth Amendment” means that certain Amendment No. 9 to Credit, Security and Guaranty Agreement, dated as of May 8, 2026, by and among the Borrowers, Holdings, Agent and the Lenders.

(b)

Section 1.1 of the Existing Credit Agreement is hereby amended by amending and restating the definition of “Financing Documents” in its entirety as follows:

“Financing Documents” means this Agreement, the First Amendment, the Second Amendment, the Third Amendment, the Fourth Amendment, the Fifth Amendment, the Sixth Amendment, the Seventh Amendment, the Eighth Amendment, the Ninth Amendment, each Intercreditor Agreement, any Notes, the Agent Fee Letter, the Security Documents, each Subordination Agreement and any other subordination or intercreditor agreement pursuant to which any Debt and/or any Liens securing such Debt is subordinated to all or any portion of the Obligations and all other documents, instruments and agreements related to the Obligations and heretofore executed, executed concurrently herewith or executed at any time and from time to time hereafter, as any or all of the same may be amended, supplemented, restated or otherwise modified from time to time.

(c)

Section 6.1 of the Existing Credit Agreement is hereby amended by replacing the reference to “April 2, 2027” therein with “July 2, 2027”.

(d)

Section 7.2(g) of the Existing Credit agreement is hereby amended by replacing the reference to “April 2, 2027” therein with “July 2, 2027”.

Representations and Warranties; Reaffirmation of Security Interest; No Liens.

(a)

Each Credit Party hereby confirms that all of the representations and warranties set forth in the Credit Agreement are true and correct in all material respects (without duplication of any materiality qualifier in the text of such representation or warranty) with respect to such Credit Party as of the date hereof except to the extent that any such representation or warranty relates to a specific date in which case such representation or warranty shall be true and correct as of such earlier date. Nothing herein is intended to impair or limit the validity, priority or extent of Agent’s security interests in and Liens on the Collateral.

(b)

Each Credit Party acknowledges and agrees that the Credit Agreement, the other Financing Documents and this Agreement constitute the legal, valid and binding obligation of such Credit Party, and are enforceable against such Credit Party in accordance with its terms, except as the enforceability thereof may be limited by bankruptcy, insolvency or other similar laws relating to the enforcement of creditors’ rights generally and by general equitable principles.

(c)

Each Credit Party hereby confirms that as of the Ninth Amendment Effective Date, no Liens exist other than Permitted Liens.

Conditions to Effectiveness. This Agreement shall become effective as of the date on which each of the following conditions has been satisfied, as determined by Agent and the Lenders in their sole discretion:

(a)

Agent and the Lenders shall have received a copy of this Agreement, dated as of even date herewith, duly-executed by each Credit Party, Agent and the Lenders.

(b)

all representations and warranties of Credit Party contained herein shall be true and correct in all material respects (without duplication of any materiality qualifier in the text of such representation or warranty) as of the date hereof except to the extent that any such representation or warranty relates to a specific date in which case such representation or warranty shall be true and correct as of such earlier date (and such parties’ delivery of their respective signatures hereto shall be deemed to be its certification thereof);

(c)

prior to and after giving effect to the agreements set forth herein, no Default or Event of Default shall exist under any of the Financing Documents;

(d)

Credit Parties shall have delivered such other documents, information, certificates, records, permits, and filings as the Agent and the Lenders may reasonably request;

(e)

the Borrowers shall have paid the Agent’s outstanding Admin Fee (as defined in the Agent Fee Letter); and

(f)

payment of all fees, expenses and other amounts due and payable under the Credit Agreement, including all reasonable and documented legal fees and expenses of Agent and Lenders.

Costs and Fees. Credit Parties shall be responsible for the payment of all reasonable, documented and invoiced out-of-pocket costs and fees of counsel and other advisors of the Lenders incurred in connection with the preparation, negotiation, execution and delivery of this Agreement and any related Financing Documents.

Release.

(a)

In consideration of, among other things, Agent’s and the Lenders’ execution and delivery of this Agreement, each Borrower and each other Credit Party, on behalf of itself and its agents, representatives, officers, directors, advisors, employees, subsidiaries, affiliates, successors and assigns (collectively, “Releasors”), hereby forever agrees and covenants not to sue or prosecute against any Releasee (as hereinafter defined) and hereby forever waives, releases and discharges, to the fullest extent permitted by law, each Releasee from any and all claims, whether known or unknown, (including, without limitation, crossclaims, counterclaims, rights of set-off and recoupment), actions, causes of action, suits, debts, accounts, interests, liens, promises, warranties, damages and consequential damages, demands, agreements, bonds, bills, specialties, covenants, controversies, variances, trespasses, judgments, executions, costs, expenses or claims whatsoever, that such Releasor now has or hereafter may have, of whatsoever nature and kind, whether known or unknown, whether now existing or hereafter arising, whether arising at law or in equity (collectively, the “Claims”), against any or all of the Agent and Lenders in any capacity and their respective affiliates, subsidiaries, shareholders and “controlling persons” (within the meaning of the federal securities laws), and their respective successors and assigns and each and all of the officers, directors, employees, agents, attorneys, advisors and other representatives of each of the foregoing (collectively, the “Releasees”), based in whole or in part on facts, whether or not now known that relate to, arise out of or otherwise are in connection with: (i) any or all of the Financing Documents, including this Agreement, the AECOM L/C (as defined in the Ares First Lien Guaranty) or transactions contemplated thereby or any actions or omissions in connection therewith, and (ii) any aspect of the dealings or relationships between or among Borrowers and the other Credit Parties, on the one hand, and any or all of the Agent and Lenders, on the other hand, relating to any or all of the documents, transactions, actions or omissions referenced in clause (i) hereof. The receipt by a Borrower or any other Credit Party of any

Loans or financial accommodations made by any Lender after the date hereof shall constitute a ratification, adoption, and confirmation by such party of the foregoing general release of all Claims against the Releasees that are based in whole or in part on facts, whether or not now known or unknown, existing on or prior to the date of receipt of any Loans or other financial accommodations. In entering into this Agreement, Borrowers and each other Credit Party consulted with, and has been represented by, legal counsel and expressly disclaims any reliance on any representations, acts or omissions by any of the Releasees and hereby agrees and acknowledges that the validity and effectiveness of the releases set forth above do not depend in any way on any such representations, acts and/or omissions or the accuracy, completeness or validity thereof. The provisions of this Section shall survive the termination of this Agreement, the Credit Agreement, the other Financing Documents and payment in full of the Obligations.

(b)

Each Borrower and each other Credit Party hereby agrees that it shall be, jointly and severally, obligated to indemnify and hold the Releasees harmless with respect to any and all liabilities, obligations, losses, penalties, actions, judgments, suits, costs, expenses or disbursements of any kind or nature whatsoever incurred by the Releasees, or any of them, whether direct, indirect or consequential, as a result of or arising from or relating to any proceeding by or on behalf of any Person, including, without limitation, the respective officers, directors, agents, trustees, creditors, partners or shareholders of any Borrower, any other Credit Party, or any of their respective Subsidiaries, whether threatened or initiated, in respect of any claim for legal or equitable remedy under any statue, regulation or common law principle arising from or in connection with the negotiation, preparation, execution, delivery, performance, administration and enforcement of the Credit Agreement, the other Financing Documents, this Agreement or any other document executed and/or delivered in connection herewith or therewith. If and to the extent that the foregoing undertaking may be unenforceable for any reason, each Borrower and other Credit Party agrees to make the maximum contribution to the payment and satisfaction thereof that is permissible under applicable law. The foregoing indemnity shall survive the termination of this Agreement, the Credit Agreement, the other Financing Documents and the payment in full of the Obligations.

(c)

Each Borrower and each other Credit Party, on behalf of itself and its successors, assigns, and other legal representatives, hereby absolutely, unconditionally and irrevocably, covenants and agrees with and in favor of each Releasee that it will not sue (at law, in equity, in any regulatory proceeding or otherwise) any Releasee on the basis of any Claim released, remised and discharged by Borrower or any other Credit Party pursuant to Section 6(a) hereof. If a Borrower, any other Credit Party or any of their successors, assigns or other legal representatives violates the foregoing covenant, Borrowers and the other Credit Parties, each for itself and its successors, assigns and legal representatives, agrees to pay, in addition to such other damages as any Releasee may sustain as a result of such violation, all attorneys’ fees and costs incurred by any Releasee as a result of such violation.

No Waiver or Novation. The execution, delivery and effectiveness of this Agreement shall not, except as expressly provided in this Agreement, operate as a waiver of any right, power or remedy of Agent, nor constitute a waiver of any provision of the Credit Agreement, the Financing Documents or any other documents, instruments and agreements executed or delivered in connection with any of the foregoing. Nothing herein is intended or shall be construed as a waiver of any existing Defaults or Events of Default under the Credit Agreement or the other Financing Documents or any of Agent’s rights and remedies in respect of such Defaults or Events of Default. This Agreement (together with any other document executed in connection herewith) is not intended to be, nor shall it be construed as, a novation of the Credit Agreement.

Affirmation. Except as specifically amended pursuant to the terms hereof, each Credit Party hereby acknowledges and agrees that the Credit Agreement and all other Financing Documents (and all covenants, terms, conditions and agreements therein) shall remain in full force and effect, and are hereby ratified and confirmed in all respects by such Credit Party. Each Credit Party covenants and agrees to

comply with all of the terms, covenants and conditions of the Credit Agreement and the Financing Documents, notwithstanding any prior course of conduct, waivers, releases or other actions or inactions on Agent’s or any Lender’s part which might otherwise constitute or be construed as a waiver of or amendment to such terms, covenants and conditions.

Miscellaneous.

(a)

Reference to the Effect on the Credit Agreement. Upon the effectiveness of this Agreement, each reference in the Credit Agreement to “this Agreement,” “hereunder,” “hereof,” “herein,” or words of similar import shall mean and be a reference to the Credit Agreement, as amended by this Agreement. Except as specifically amended above, the Credit Agreement, and all other Financing Documents (and all covenants, terms, conditions and agreements therein), shall remain in full force and effect, and are hereby ratified and confirmed in all respects by each Credit Party.

(b)

No Strict Construction. The parties hereto have participated jointly in the negotiation and drafting of this Agreement. In the event an ambiguity or question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties hereto and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any provisions of this Agreement.

(c)

Governing Law. THIS AGREEMENT AND THE LOANS SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK EXCEPT TO THE EXTENT THAT UNITED STATES FEDERAL LAW PERMITS ANY LENDER TO CONTRACT FOR, CHARGE, RECEIVE, RESERVE OR TAKE INTEREST AT THE RATE ALLOWED BY THE LAWS OF THE STATE WHERE SUCH LENDER IS LOCATED.

(d)

WAIVER OF JURY TRIAL. (i) EACH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATING TO THIS AGREEMENT OR ANY OTHER FINANCING DOCUMENT AND FOR ANY COUNTERCLAIM THEREIN; (ii) EACH CREDIT PARTY HEREBY IRREVOCABLY WAIVES, TO THE MAXIMUM EXTENT NOT PROHIBITED BY LAW, ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER IN ANY SUCH LITIGATION ANY SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES, OR DAMAGES OTHER THAN, OR IN ADDITION TO, ACTUAL DAMAGES; PROVIDED THAT NOTHING CONTAINED IN THIS SECTION 9(d) SHALL LIMIT THE CREDIT PARTIES’ INDEMNIFICATION OBLIGATIONS TO THE EXTENT SET FORTH IN SECTION 11.6 OF THE CREDIT AGREEMENT TO THE EXTENT SUCH SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES ARE INCLUDED IN ANY THIRD PARTY CLAIM IN CONNECTION WITH WHICH SUCH INDEMNITEE IS OTHERWISE ENTITLED TO INDEMNIFICATION HEREUNDER; (iii) EACH PARTY HEREBY CERTIFIES THAT NO PARTY HERETO NOR ANY REPRESENTATIVE OR AGENT OR COUNSEL FOR ANY PARTY HERETO HAS REPRESENTED, EXPRESSLY OR OTHERWISE, OR IMPLIED THAT SUCH PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVERS, AND

(iv) EACH PARTY HEREBY ACKNOWLEDGES THAT IT HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT, THE FINANCING DOCUMENTS AND THE TRANSACTIONS CONTEMPLATED HEREBY AND THEREBY BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS CONTAINED IN THIS SECTION 9(d).

(e)

Incorporation of Credit Agreement Provisions. The provisions contained in Section

11.6 (Indemnification), Section 13.8(b) (Submission to Jurisdiction) and Section 13.19 (Surety Rights) of

the Credit Agreement are incorporated herein by reference to the same extent as if reproduced herein in their entirety.

(f)

Headings. Headings and captions used in this Agreement (including the Exhibits, Schedules and Annexes hereto, if any) are included for convenience of reference only and shall not be given any substantive effect.

(g)

Counterparts; Integration. This Agreement may be signed in any number of counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument. Signatures by facsimile or by electronic mail delivery of an electronic version of any executed signature page shall bind the parties hereto. In furtherance of the foregoing, the words “execution”, “signed”, “signature”, “delivery” and words of like import in or relating to any document to be signed in connection with this Agreement and the transactions contemplated hereby or thereby shall be deemed to include Electronic Signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, to the extent and as provided for in any applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act, or any other similar state laws based on the Uniform Electronic Transactions Act. As used herein, “Electronic Signature” means an electronic sound, symbol, or process attached to, or associated with, a contract or other record and adopted by a Person with the intent to sign, authenticate or accept such contract or other record. This Agreement and the other Financing Documents constitute the entire agreement and understanding among the parties hereto and supersede any and all prior agreements and understandings, oral or written, relating to the subject matter hereof.

(h)

Severability. In case any provision of or obligation under this Agreement shall be invalid, illegal or unenforceable in any jurisdiction, the validity, legality and enforceability of the remaining provisions or obligations, or of such provision or obligation in any other jurisdiction, shall not in any way be affected or impaired thereby.

(i)

Time of the Essence. Time is of the essence in Borrower’s and each other Credit Party’s performance under this Agreement and all other Financing Documents.

(j)

Successors/Assigns. This Agreement shall be binding upon and inure to the benefit of Credit Parties and Agent and each Lender and their respective successors and permitted assigns.

(k)

Agent. Each of the undersigned Lenders, by their execution of this Agreement, directs the Agent to execute this Agreement. In doing so, the Agent shall be entitled to all rights, benefits and protections set forth in the Credit Agreement.

[SIGNATURES APPEAR ON FOLLOWING PAGES]

IN WITNESS WHEREOF, intending to be legally bound, each of the parties have caused this Agreement to be executed the day and year first above mentioned.

AGENT: ALTER DOMUS (US) LLC,

as Agent

By: __________________

Name:

Title:

Associate Counsel

LENDERS: AECOM,

as Lender

By: ______________________

Name:

Title:

BERKSHIRE HATHAWAY SPECIALTY INSURANCE COMPANY,

as Lender

By: ________________

Name:

Title:

LENDERS: AECOM,

as Lender

By: _______________

Name:

Title:

BERKSHIRE HATHAWAY SPECIALTY INSURANCE COMPANY,

as Lender

By:__________________________

Name: Jeffrey Jubera

Title: V.P. – Global Surety Claims

BORROWERS: SHIMMICK CONSTRUCTION COMPANY, INC.

By: _________________________

Name: Todd Yoder

Title: Chief Financial Officer

GUARANTORS: SHIMMICK CORPORATION

By:_____________________

Name: Todd Yoder

Title: Chief Financial Officer

Shimmick Corp 10-Q