Mesa Laboratories, Inc. amendment to a Schedule 13G/A reports that Long Path-affiliated entities collectively beneficially hold 477,126 shares of Common Stock, equal to 8.6% of the class. Percentage ownership is calculated from 5,524,931 shares outstanding as of May 21, 2026.
The filing names Long Path Smaller Companies Fund, Long Path Fund GP, Long Path Partners, Long Path Holdings LLC, William Thomas Brennan and Brian Paul Nelson as reporting persons and states the shares are directly held by the Fund with disclaimers of beneficial ownership by each reporting person except for pecuniary interest.
Positive
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Insights
Long Path holds an 8.6% stake in Mesa Laboratories via its fund.
The Schedule 13G/A amendment lists 477,126 shares held by the Fund and affiliated entities, representing 8.6% of the issuer based on May 21, 2026 outstanding shares. The filing clarifies voting and dispositive power as shared and attributes ownership to the Fund.
Future disclosures in filings may show changes; this amendment is a positional disclosure rather than a transaction notice. Cash‑flow treatment or planned disposals are not described in the provided excerpt.
Key Figures
Shares held:477,126 sharesPercent of class:8.6%Shares outstanding:5,524,931 shares+1 more
4 metrics
Shares held477,126 sharesreported beneficially held by the Fund and affiliates
Percent of class8.6%percentage ownership based on outstanding shares
Shares outstanding5,524,931 sharesoutstanding as of May 21, 2026 (used for percentage calculation)
CUSIP59064R109Mesa Laboratories Common Stock CUSIP
Key Terms
Schedule 13G/A, Beneficial ownership, Shared Dispositive Power, Shared Voting Power
4 terms
Schedule 13G/Aregulatory
"This Amendment No. 2 to the Schedule 13G/A is filed by (i) Long Path Smaller Companies Fund"
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
Beneficial ownershipfinancial
"Amount beneficially owned: The information required by this paragraph is set forth in the cover pages"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Shared Dispositive Powerfinancial
"Shared Dispositive Power 477,126.00"
Shared Voting Powerfinancial
"Shared Voting Power 477,126.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
What stake does Long Path report in Mesa Laboratories (MLAB)?
Long Path-affiliated entities report ownership of 477,126 shares, representing 8.6% of Mesa Laboratories' common stock. This percentage uses 5,524,931 shares outstanding as of May 21, 2026, per the issuer's Form 10-K cited in the filing.
Which Long Path entities are listed in the Schedule 13G/A amendment?
The amendment names Long Path Smaller Companies Fund, LP; Long Path Fund GP, LLC; Long Path Partners, LP; Long Path Holdings LLC, plus individuals William Thomas Brennan and Brian Paul Nelson as reporting persons, with the Fund holding the shares directly.
How is voting and dispositive power reported for these shares?
The filing shows 0 sole voting and dispositive power and 477,126 shares of shared voting and shared dispositive power, indicating the Fund and affiliated entities share control over voting and disposition of the reported shares.
What outstanding share count is used to calculate the 8.6% figure?
The percentage is based on 5,524,931 shares outstanding as of May 21, 2026, as reported in Mesa Laboratories' Form 10-K for the fiscal year ended March 31, 2026, which the amendment cites for its calculation.
Does the amendment state that any shares were bought or sold?
No. This Schedule 13G/A amendment reports beneficial ownership and attributes the position to the Fund; it does not disclose any purchase or sale transactions or changes in holdings within the provided excerpt.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 2)
Mesa Laboratories, Inc.
(Name of Issuer)
Common Stock, no par value
(Title of Class of Securities)
59064R109
(CUSIP Number)
06/30/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
59064R109
1
Names of Reporting Persons
Long Path Smaller Companies Fund, LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
477,126.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
477,126.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
477,126.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
PN
SCHEDULE 13G
CUSIP Number(s):
59064R109
1
Names of Reporting Persons
Long Path Fund GP, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
477,126.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
477,126.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
477,126.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
OO
SCHEDULE 13G
CUSIP Number(s):
59064R109
1
Names of Reporting Persons
Long Path Partners, LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
477,126.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
477,126.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
477,126.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP Number(s):
59064R109
1
Names of Reporting Persons
Long Path Holdings LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
477,126.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
477,126.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
477,126.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
OO
SCHEDULE 13G
CUSIP Number(s):
59064R109
1
Names of Reporting Persons
William Thomas Brennan
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
477,126.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
477,126.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
477,126.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
IN, HC
SCHEDULE 13G
CUSIP Number(s):
59064R109
1
Names of Reporting Persons
Brian Paul Nelson
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
477,126.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
477,126.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
477,126.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
IN, HC
SCHEDULE 13G
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. 2 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 and Amendment No. 1 thereto filed on April 15, 2026 (as so amended, 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.:
59064R109
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);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(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);
(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:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
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 5,524,931 shares of Common Stock outstanding as of May 21, 2026, as reported in the Issuer's Report on Form 10-K for the fiscal year ended March 31, 2026 filed with the Securities and Exchange Commission on June 3, 2026.
(c)
Number of shares as to which the person has:
(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.
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Long Path Smaller Companies Fund, LP
Signature:
/s/ William Thomas Brennan
Name/Title:
William Thomas Brennan/Managing Member of Long Path Fund GP, LLC, its general partner
Date:
07/07/2026
Long Path Fund GP, LLC
Signature:
/s/ William Thomas Brennan
Name/Title:
William Thomas Brennan/Managing Member
Date:
07/07/2026
Long Path Partners, LP
Signature:
/s/ William Thomas Brennan
Name/Title:
William Thomas Brennan/Managing Member of Long Path Holdings LLC, its general partner
