| Item 1. | |
| (a) | Name of issuer:
Mesa Laboratories, Inc. |
| (b) | Address of issuer's principal executive offices:
12100 West Sixth Ave., Lakewood, CO 80228 |
| Item 2. | |
| (a) | Name of person filing:
This Amendment No. 1 to Schedule 13G is filed by (i) Long Path Smaller Companies Fund, LP (the "Fund"), (ii) Long Path Fund GP, LLC (the "Fund GP"), as the general partner of the Fund, (iii) Long Path Partners, LP (the "Adviser"), as the investment adviser to the Fund, (iv) Long Path Holdings LLC (the "Adviser GP"), as the general partner of the Adviser, (v) William Thomas Brennan, as the managing member of the Fund GP and the Adviser GP and co-portfolio manager of the Fund, and (vi) Brian Paul Nelson, as co-portfolio manager of the Fund and a member of the Adviser GP (each, a "Reporting Person" and collectively, the "Reporting Persons"). Reference is hereby made to the Schedule 13G filed with the Securities and Exchange Commission by the Reporting Persons with respect to the Common Stock of the Issuer on March 13, 2026 (the "Schedule 13G"). The agreement among the Reporting Persons to file jointly (the "Joint Filing Agreement") was filed as Exhibit A to the initial filing of the Schedule 13G. The shares reported herein are directly held by the Fund and each Reporting Person disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein. |
| (b) | Address or principal business office or, if none, residence:
c/o Long Path Partners, 1 Landmark Square, Suite 1920, Stamford, CT 06901 |
| (c) | Citizenship:
The Fund is a Delaware limited partnership. The Fund GP is a Delaware limited liability company. The Adviser is a Delaware limited partnership. The Adviser GP is a Delaware limited liability company. William Thomas Brennan and Brian Paul Nelson are citizens of the United States. |
| (d) | Title of class of securities:
Common Stock, no par value |
| (e) | CUSIP No.:
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| Item 3. | If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: |
| (a) |  Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
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| (b) | Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
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| (c) | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
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| (d) | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
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| (e) | An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
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| (f) | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
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| (g) | A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
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| (h) | A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
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| (i) | A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
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| (j) | A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
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| (k) | Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
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| | |
| Item 4. | Ownership |
| (a) | Amount beneficially owned:
The information required by this paragraph is set forth in the cover pages to this Schedule 13G/A and is incorporated herein by reference. |
| (b) | Percent of class:
The information required by this paragraph is set forth in the cover pages to this Schedule 13G/A and is incorporated herein by reference. Percentage ownership is based on 5,524,813 shares of Common Stock outstanding as of January 31, 2026, as reported in the Issuer's Report on Form 10-Q for the period ended December 31, 2025 filed with the Securities and Exchange Commission on February 3, 2026. |
| (c) | Number of shares as to which the person has:
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| | (i) Sole power to vote or to direct the vote:
The information required by this paragraph is set forth in the cover pages to this Schedule 13G/A and is incorporated herein by reference.
|
| | (ii) Shared power to vote or to direct the vote:
The information required by this paragraph is set forth in the cover pages to this Schedule 13G/A and is incorporated herein by reference.
|
| | (iii) Sole power to dispose or to direct the disposition of:
The information required by this paragraph is set forth in the cover pages to this Schedule 13G/A and is incorporated herein by reference.
|
| | (iv) Shared power to dispose or to direct the disposition of:
The information required by this paragraph is set forth in the cover pages to this Schedule 13G/A and is incorporated herein by reference.
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| Item 5. | Ownership of 5 Percent or Less of a Class. |
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Not Applicable
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| Item 6. | Ownership of more than 5 Percent on Behalf of Another Person. |
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Not Applicable
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| Item 7. | Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person. |
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Not Applicable
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| Item 8. | Identification and Classification of Members of the Group. |
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Not Applicable
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| Item 9. | Notice of Dissolution of Group. |
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Not Applicable
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Rule 13d-1(c)