EXHIBIT 10.1

Exhibit 10.1

REVOLVING LOAN AND SECURITY AGREEMENT

THIS REVOLVING LOAN AND SECURITY AGREEMENT (the “Agreement”) is made and entered into as of October 29, 2026 (the “Effective Date”) by and between Geospace Technologies Corporation a Texas corporation (together with its successors and assigns “Geospace”), GTC, Inc. a Texas corporation ( together with its successors and assigns “GTC”) ( each individually and collectively herein, the “Borrower”), and if more than one, jointly and severally, and Amerisource Funding, Inc., a Texas corporation (together with its successors and assigns, “Lender”), The Borrower, the Lender from time to time party to this Agreement, and the Guarantors from time to time party to this Agreement are each referred to herein as a “Party” and, collectively herein, as the “Parties”.

RECITALS

WHEREAS, the Borrower has asked Lender to make advances to the Borrower in an aggregate principal amount outstanding at any time not to exceed TWENTY-FIVE MILLION DOLLARS ($25,000,000.00) as may be reviewed from time to time as necessary based on growth and working capital needs of the Company (the "Total Credit Facility"); and

WHEREAS, the Lender are willing, on the terms and subject to the conditions set forth in this Agreement and the other Credit Documents, to make advances to the Borrower;

NOW, THEREFORE, in consideration of the foregoing recitals, and for other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties agree as follows:

Article I.    DEFINITIONS

Section 4.01** Defined Terms**. All capitalized terms not otherwise defined below or herein shall have the meaning set forth in the Uniform Commercial Code. The following capitalized terms shall have the following meanings:

Article II.    CREDIT FACILITY TERMS

Section 2.01 Revolving Line of Credit.

Section 2.02 Borrowing Base Report and Procedure. Borrower’s withdrawals, advances and disbursements under the Credit Facility shall be governed by a Borrowing Base Report to be prepared or modified by Lender from time to time in its sole discretion, a sample of which appears in Exhibit “A”. Each Borrowing Base Report shall set forth a calculation of Borrower’s Availability under the Credit Facility based on eligible Collateral as more fully defined below:

Section 2.03 Terms and Evidence of Debt.

**Section 2.04 Maturity. **This term of this Agreement shall expire 36 months from the Effective Date (the “Initial Maturity Date”). Borrower may terminate the Agreement by giving Lender at least sixty (60) days written notice of termination prior to the Maturity Date. Upon termination, Borrower shall pay the Obligations to Lender. In the event of termination of the Agreement prior to the Initial Maturity Date, an Early Termination Fee equal to: (i) Three Percent (3.00%) of the Total Credit Facility shall apply if the termination occurs on or before the first anniversary of the Closing Date (the “Closing Date” is the date of this Agreement) ; (ii) if the termination occurs after the first anniversary of the Closing Date but on or before the second anniversary of the Closing Date, an Early Termination Fee equal to Two Percent (2.00%) of the Total Credit Facility shall apply; and an Early Termination Fee equal to ONE Percent (1.00%) of the Total Credit Facility shall apply, if the termination occurs after the second anniversary of the Closing Date but on or before the third anniversary of the Closing Date; provided that no such Early Termination Fee shall be charged if the Credit Facility provided hereunder is replaced with a new facility. Upon termination of this Agreement, Lender may retain amounts (i) sufficient to cover any Obligations that were either known or unknown to Lender at the time of termination, and (ii) until Borrower has executed and delivered to Lender a general indemnity and mutual release in a form acceptable to Lender.

Section 2.05 Security Interest. As collateral securing the Obligations, Borrower grants and assigns to Lender a continuing security interest in and to all of its now owned and hereafter acquired personal property and fixtures, and all direct and indirect proceeds thereof (including proceeds of proceeds), including without limitation Accounts, Chattel Paper, Goods (including Inventory and Equipment), Instruments, Investment Property, Documents, General Intangibles, monies, deposit accounts, claims and credit balances, and all Intellectual Property (including Trademarks, Patents and Copyrights, Licenses, Brands), Goodwill, tax refunds, Judgments, claims under Chapter 5 of the Bankruptcy Code, and all other property (real, personal, tangible, intangible, or any combination thereof, together with a deed of trust, mortgage, assignments of rents, security pledge or other documents substantially in the form of Exhibit “C” incorporated herein for all purposes, and associated with any Borrower’s property at 6410 Langfield Rd, Houston, TX 77040, 7007 Pinemont Drive, Houston, TX 77040 and at 4318 Northfield Lane, Houston, TX 77092 (collectively, the “Collateral”). Each applicable Loan Party shall execute and deliver such other security documents in respect of intellectual property, real property or any other Collateral as are reasonably requested by the Lender.

Section 2.06 Setoff and Recoupment. Lender is hereby authorized at any time and to the fullest extent permitted by law, without notice to the Borrower or Guarantor (any such notice being expressly waived by the Borrower and Guarantor), to setoff, recoup, and apply any and all deposits or other indebtedness at any time owing by Lender or subsidiaries of Lender to or for the Borrower’s, Guarantor’s or an affiliate’s credit or account against any and all of their respective obligations now or hereafter existing under this Agreement, or any other Credit Document, irrespective of whether or not Lender has made any demand under this Agreement, or any other Credit Document, and although such obligations may be unmatured. Lender’s rights under this Section 2.06** **are in addition to other rights and remedies (including other rights of setoff) which Lender may have.

Section 2.07 Authorization to Lender. Borrower hereby irrevocably authorizes Lender at Borrower's expense, to exercise at any time any of the following powers until all of the Obligations have been paid in full: (a) receive, take, endorse, assign, deliver, accept and deposit, in the name of Lender or Borrower, any and all cash, checks, commercial paper, drafts, remittances and other instruments and documents relating to the Collateral or the proceeds thereof, (b) take or bring, in the name of Lender or Borrower, all steps, actions, suits or proceedings deemed by Lender necessary or desirable to effect collection of or other realization upon the Accounts and other Collateral, (c) after an Event of Default, change the address for delivery of mail to Borrower and to receive and open mail addressed to Borrower, (d) after an Event of Default, extend the time of payment of, compromise or settle for cash, credit, return of merchandise, and upon any terms or conditions, any and all Accounts or other Collateral which includes a monetary obligation and discharge or release any account debtor or other obligor (including filing of any public record releasing any lien or security interest granted to Borrower by such account debtor), without affecting any of the Obligations, (e) pay or withhold any sums necessary to discharge any lien, security interest or encumbrance which is senior to, may become senior to, or impairs Lender's security interest in the Collateral, or for any past due taxes of the Borrower, which sums shall be included as Obligations hereunder, (f) in order to complete funding transfers or disbursements, or to satisfy any of the Obligations, initiate electronic debit or credit entries through the Automated Clearinghouse system to any deposit account maintained by Borrower wherever located, (g) file in the name of Borrower or Lender, or both, mechanic’s or materialman’s liens or related notices, or claims under any payment bond, in connection with goods or services sold by Borrower in connection with the improvement of realty, (h) notify any Account Debtor obligated with respect to any Account that the underlying Account has been assigned to Lender by Borrower and that payment thereof is to be made to Lender, and (i) audit, confirm or verify the amount and validity of any Account created by Borrower.

Article III.    COVENANTS

**Section 3.01 *Covenants. ***So long as any Obligation by the Borrower to Lender hereunder remains outstanding:

Section 3.02 Cross-Default. If Borrower, Guarantor(s), or any Affiliates of Borrower (defined below) are in default under any other loans or advances of credit (including guaranty agreements or factoring obligations) held by Lender (each an “Other Obligation”), or if there is a default in any of the terms, covenants, agreements, conditions or provisions set forth in this Agreement, the Note, any other Credit Document, or any other instrument relating to this Agreement or the Note, or should the Lender conclude, in its sole discretion, that the prospect of payment of all or any portion of the Obligations, as modified by this Agreement, or of any Other Obligation, is impaired for any reason, then Lender, at its option, may declare the entirety of the Obligations, as modified by this Agreement, and any Other Obligation, together with all accrued but unpaid interest, immediately due and payable without notice, demand or presentment, or notice of intent to accelerate to the Borrower or any other person or party, all of which are hereby waived. The Lender’s failure to or delay in exercise of said option will not constitute a wavier on the part of Lender of the right to exercise said option at any other time. Upon the occurrence of any default or Event of Default, Lender shall also have the right to exercise any and all other rights, remedies and recourses now or hereinafter existing in equity, at law, by virtue of statute or otherwise, including, but not limited to, the right to foreclose any and all liens and security interests securing the Obligations. “Affiliates of Borrower” means Geospace Engineering Resources International Inc., a Texas corporation, Geospace Technologies, Sucursal Sudamericana LLC, a Texas limited liability company, Quantum Technology Sciences, Inc. a Florida corporation, Aquana, LLC, a Vermont LLC, Geovox Security, Inc., a Texas corporation, or any entity in which 20% or more is owned by, or in which 20% or more voting control is held by, Maker, Geospace Technologies, Sucursal Sudamericana LLC, a Texas limited liability company, Quantum Technology Sciences, Inc. a Florida corporation, Aquana, LLC, a Vermont LLC, or Geovox Security, Inc., a Texas corporation, whether now or in the future.

Section 3.03 Cross-Collateralization. Except as may be limited or prohibited by applicable law, the Borrower, Guarantor(s), and Affiliates of Borrower agree and acknowledge that the Credit Documents secure (a) the Obligations, as extended and/or modified, including interest, late charges, fees, expenses and other amounts as provided in the Note, the other Credit Documents and this Agreement, (b) all other debts, obligations and liabilities of the Borrower, Guarantor(s), and/or Affiliates of Borrower, Lender of whatever kind or character, whether now existing or hereafter arising, secured or unsecured, direct or indirect, fixed or contingent, primary or secondary, joint or several, or both, including, without limitation, all present and future debts, obligations and liabilities of the Borrower, Guarantor(s), and/or Affiliates of Borrower (i) as principal, surety, endorser, guarantor, accommodation party or otherwise, (ii) arising by operation of law or otherwise, (iii) as a member of any partnership, joint venture, company, firm, trust or other association, (iv) payable to or in favor of third parties and hereafter acquired by Lender with or without the knowledge, consent or insistence of the Borrower, Guarantor(s), and/or Affiliates of Borrower, or (v) relating to any services rendered by Lender for the benefit of the Borrower, Guarantor(s), and/or Affiliates of Borrower, including, without limitation, credit cards, treasury or cash management services all of which indebtedness is secured by the Credit Documents, and (c) all renewals, rearrangements, modifications and extensions of any of the foregoing.

Article IV.    REPRESENTATIONS AND WARRANTIES

Section 4.01 Representations and Warranties. The Borrower represents and warrants to Lender as of the date hereof and affirms these representations and warrantees at the time of each Request for Funds as follows:

Article V.    DEFAULT

Section 5.01** Events of Default.** Any of the following events will constitute an Event of Default hereunder and under the other Credit Documents:

In any such event, the aggregate outstanding Obligations, together with all accrued but unpaid interest thereon and all other amounts owed by the Borrower hereunder or under any other Credit Document, shall automatically become immediately due and payable without presentment, demand, protest, notice of protest, notice of non-payment or dishonor, notice of acceleration, notice of intent to accelerate, or further notice of any kind, all of which are hereby expressly waived by the Borrower and Guarantor; and Lender’s commitment to make advances hereunder shall automatically terminate, without presentment, demand, protest, notice of protest, notice of non-payment or dishonor, notice of acceleration, notice of intent to accelerate, or notice of any kind.

**Section 5.02 Waiver of Notice. **Borrower waives any requirement that Lender inform Borrower by affirmative act or otherwise of any Event of Default hereunder. Further, Lender’s failure to charge or accrue interest or fees at any “Penalty”, “Default”, or “Past Due” rate shall not be deemed a waiver by Lender of its claim thereto.

Section 5.03 Remedies. Upon an Event of Default that is continuing or uncured, in addition to any rights or remedies Lender has under this Agreement, the other Credit Documents, or applicable law which shall be cumulative and exclusive, Lender shall: (i) immediately terminate this Agreement without notice, protest, notice of protest, notice of non-payment or dishonor, notice of acceleration, notice of intent to accelerate, or any other notice, at which time all Obligations shall immediately become due and payable without notice or demand, protest, notice of protest, notice of non-payment or dishonor, notice of acceleration, notice of intent to accelerate, or any other notice, notwithstanding the maturity date; (ii) charge the default interest rate equal to the greater of eighteen percent (18%) per annum or the maximum rate allowable by law on all Obligations until such Obligations are paid in full or until such time as Lender confirms the default has been cured; (iii) enter any premises of Borrower where the books, records and Collateral of Borrower may be kept and remove the same for such time as Lender may desire in order to protect, collect and liquidate the Collateral. All expenses relating thereto, including moving expenses, the leasing of additional facilities and the hiring of security guards shall be borne by Borrower. Upon request by Lender, Borrower shall assemble the Collateral and make it available to Lender at a time and place to be designated by Lender which is reasonably convenient to Lender and Borrower; Borrower shall fully cooperate with all of Lender’s efforts to preserve the Collateral and will take such actions to preserve the Collateral as Lender may direct. Borrower agrees that Lender has no obligation to preserve rights to the Collateral against prior parties or to marshal any Collateral for the benefit of any party. In addition to any and all other remedies available to Lender, herein, in the event Borrower shall not deliver the documentation required in Section 3.01 in the time required, Borrower shall pay Lender on demand a per diem penalty of two thousand dollars ($2,000).

Section 5.04 **Right of Injunction. **Borrower and Guarantor acknowledge that upon the occurrence of an Event of Default, no remedy at law will provide adequate relief to Lender; therefore, Borrower and Guarantor agree that Lender shall be entitled to temporary and permanent injunctive, or other equitable relief in any such case without proving actual damages, it being acknowledged that the nature of Borrower's business dictates such relief is necessary in order to preserve the Collateral and rights of Lender.

Article VI         MISCELLANEOUS

Section 6.01 Amendment. Neither this Agreement, any other Credit Document, nor any provisions hereof or thereof may be changed, waived, discharged or terminated, nor may any consent to the departure from the terms hereof be given orally (even if supported by new consideration), but only by an instrument in writing signed by all parties to this Agreement or to such other Credit Documents, as applicable, with the written consent of the Lender. Any waiver or consent so given shall be effective only in the specific instance and for the specific purpose for which given. No failure on the part of Lender to exercise, and no delay in exercising, and no course of dealing with respect to, any right, power, or privilege under this Agreement, shall operate as a waiver thereof, nor shall any single or partial exercise of any right, power, or privilege under this Agreement, nor any abandonment or discontinuation of steps to enforce any right, power, or privilege under this Agreement, preclude any other or further exercise thereof or the exercise of any other right, power, or privilege. The rights and remedies provided for in this Agreement and the other Credit Documents are cumulative and not exclusive of any rights and remedies provided by law.

Section 6.02 Notice.

c/o: Geospace Technologies Corporation

Address: 7007 Pinemont Dr., Houston, Texas 77040

Attention of Robert Curda

Telephone No: 713 986 8676

E-mail: rcurda@geospace.com

Amerisource Funding, Inc,

7225 Langtry Street, Houston, Texas 77040;

Attention of Joseph L. Page

Facsimile No. (713) 863-1434

Telephone No. (713) 863-8300, ext. 313;

E-mail: jpage@amerisource.us.com;

Notices sent by hand or overnight courier service, or mailed by certified or registered mail, shall be deemed to have been given when received. Notices sent by facsimile shall be deemed to have been given when sent (except that, if not given during normal business hours for the recipient, shall be deemed to have been given at the opening of business on the next Business Day for the recipient). Notices delivered through electronic communications, to the extent provided in Section 6.02(b) below, shall be effective as provided in said Section.

All notices to Lender hereunder shall be deemed given upon actual receipt by a responsible officer of Lender.

Section 6.03 Waiver. No failure to exercise and no delay in exercising any right, power, or remedy hereunder shall impair any right, power, or remedy which Lender, may have, nor shall any such delay be construed to be a waiver of any of such rights, powers, or remedies, or any acquiescence in any breach or default hereunder; nor shall any waiver by Lender of any breach or default by Borrower hereunder be deemed a waiver of any default or breach subsequently occurring. All rights and remedies granted to Lender hereunder shall remain in full force and effect notwithstanding any single or partial exercise of, or any discontinuance of action begun to enforce, any such right or remedy. The rights and remedies specified herein are cumulative and not exclusive of each other or of any rights or remedies that Lender would otherwise have. Any waiver, permit, consent or approval by Lender of any breach or default hereunder must be in writing and shall be effective only to the extent set forth in such writing and only as to that specific instance.

Section 6.04 Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the Borrower, Guarantors, Lender, and its respective successors and assigns. Lender may sell, assign or otherwise transfer all or any portion of its right, title and interest in, and its obligations under, this Agreement and the other Credit Documents to any party. In connection therewith, the Borrower shall execute and deliver such documents, instruments and agreements as Lender may reasonably request to effect such sale, assignment or transfer. Borrower may not sell, assign, transfer, or pledge its rights or obligations hereunder without the prior written consent of Lender.

Section 6.05 Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be an original, with the same effect as if all signatures were upon the same instrument. Delivery of an executed counterpart of the signature page of this Agreement by facsimile, email or other electronic transmission shall be effective as delivery of a manually executed counterpart of this Agreement, and any Party delivering such an executed counterpart to any other Party shall thereafter also promptly deliver a manually executed counterpart of this Agreement to such other Party, provided that the failure to deliver such manually executed counterpart shall not affect the liability, enforcement, or binding effect of this Agreement.

Section 6.06 **Imaged Documents. **Borrower, Guarantor, and all sureties, endorsers, guarantors, and any other party now or hereafter liable for the payment of the Obligations, in whole or in part, (i) understand and agree that Lender’s document retention policy may involve the imaging of executed documents, which includes but is not limited to any note, guaranty, deed of trust, security agreement, intellectual property security agreement, assignment, financing statement and any other document which evidences any indebtedness owed by Borrower or Guarantors to Lender, and the destruction of the paper original, including the original note, and (ii) waive any rights and/or defenses that it may have to the use of such imaged copies of documents in the enforcement of any of Lender’s rights in a court of law or otherwise and/or as to any claim that such imaged copies of the documents are not originals.

Section 6.07 Severability. In the event any one or more of the provisions contained in this Agreement is held to be invalid, illegal or unenforceable in any respect, then such provision shall be ineffective only to the extent of such prohibition or invalidity, and the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby

Section 6.08 Joinder of Guarantor. By each Guarantor’s signature below, each Guarantor, individually, (i) joins herein and confirms that the warranties and representations made herein are true and correct; (ii) agrees to cause Borrower to maintain compliance with all covenants mandated herein; (iii) agrees that any certificate, request for advance or other similar document now or hereafter given to Lender by anyone on behalf of Borrower shall be true and correct; (iv) shall be liable for any damage or loss suffered by Lender as a result of the falsity of any such warranty or representation in any respect, or the noncompliance with any such covenant, including the payment of the Obligations

Section 6.09 Governing Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of Texas, without regard to the conflict of law principles thereof.

Section 6.10 Dispute Resolution Provisions: Any action arising out of or relating to this Agreement shall be resolved as follows:

Section 6.11 Consent to Venue; Jurisdiction: To the extent required for enforcement of the prior provisions above or to the extent that any arbitration provisions shall be ruled unenforceable and the resolution of a dispute shall require submission to a court, the Parties agree that any suit, action or other proceeding relating to this agreement or a guaranty, the Parties agree that any suit, action or proceeding arising out of the subject matter hereof, or the interpretation, performance or breach of this Agreement, shall, at Lender’s sole option, be instituted in either the State District Court of Harris County, Texas, or in the United States District Court for the Southern District of Texas, at the option of Lender. Borrower and Guarantors hereby irrevocably submit to the venue and jurisdiction of such courts and waive any and all objections to jurisdiction or venue that it may have under the laws of the State of Texas or otherwise in those courts in any such suit, action or proceeding. Should such proceeding be initiated in any other forum, Borrower waives any right to oppose any motion or application made by Amerisource as a consequence of such proceeding having been commenced in such forum.

Section 6.12 Waiver of Jury Trial: Borrower and Guarantors do each knowingly and voluntarily and intelligently waive their constitutional right to a trial by jury with respect to any claim, dispute, conflict or contention, if any, as may arise under this Agreement or under the related Credit Documents and agree that any litigation between the Parties concerning this Agreement and the Credit Documents shall be heard by a court of competent jurisdiction sitting without a jury. Borrower and Guarantors hereby confirm to Amerisource and the lenders that they have reviewed the effect of this waiver of jury trial with competent legal counsel of their choice, or have been afforded the opportunity to do so, prior to signing this agreement and the credit documents and each acknowledge and agree that Amerisource and the lenders are relying upon this waiver in entering into this agreement and providing advances to the Borrower.

Section 6.13 Waiver of Special Damages. The Borrower and Guarantors waive, to the maximum extent not prohibited by law, any right the Borrower and/or Guarantor may have to claim or recover from Amerisource and any other Lender in any legal action or proceeding any special, exemplary, punitive, or consequential damages.

Section 6.14 Agreement Presumptions and Invalid Provisions.* *The Parties acknowledge that they have been represented by counsel, that the Agreement and all Credit Documents have been freely negotiated and that there shall be no presumption made against a Party as author or drafter of the documents and that the interpretation of this Agreement and all other Credit Documents shall be presumed as equally drafted by each of the Parties.

Section 6.15 {Provision Intentionally Left blank}

Section 6.16 {Provision Intentionally Left blank}

Section 6.17 Entire Agreement. This agreement supersedes all other agreements and understandings between the parties hereto, verbal or written, express or implied, relating to the subject matter hereof. No promises of any kind have been made by Lender to induce Borrower to execute this agreement. No course of dealing, course of performance or trade usage, and no parole evidence of any nature, shall be used to supplement or modify any terms of this agreement.

THIS AGREEMENT AND THE OTHER CREDIT DOCUMENTS REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.

THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be duly executed and delivered by their respective duly authorized officers as of the Effective Date.

BORROWER(S):

GEOSPACE TECHNOLOGIES CORPORATION,

a Texas corporation

By: */s/ Richard J. Kelley                                            *

Richard J. Kelley, President and Chief Executive Officer

GTC, INC.,

a Texas corporation

By: */s/ Richard J. Kelley                                            *

Richard J. Kelley, President and Chief Executive Officer

GUARANTOR(S):

QUANTUM TECHNOLOGY SCIENCES, INC.,

a Florida corporation

By: */s/ Robert L. Curda                                              *

Robert L. Curda, President

AQUANA, LLC,

a Vermont limited liability company

By: */s/ Robert L. Curda                                              *

Robert L. Curda, Manager

GUARANTOR(S) CONT’D:

GEOVOX SECURITY, INC.,

a Texas corporation

By: */s/ Richard J. Kelley                                            *

Richard J. Kelley, President

GEOSPACE TECHNOLOGIES, SUCURSAL SUDAMERICANA LLC,

a Texas limited liability company

By: */s/ Richard J. Kelley                                            *

Richard J. Kelley, President

AMERISOURCE:                         Amerisource Funding, Inc.,

By: */s/ Kendra Wilson                                                *

Signature of Authorized Representative

Printed Name: Kendra Wilson

Title: Executive Vice President