Mesa Laboratories director Sullivan gifts 1,200 shares

The reported gift price was $0.0000 for each common share transferred.

Rhea-AI Filing Summary

Mesa Laboratories director John James Sullivan made a bona fide gift transfer of 1,200 common shares on October 13, 2026, reported at $0.0000 per share. He held 19,418 shares directly after the transfer. Separately, the Sullivan Family Trust held 45,110 shares; Sullivan's spouse serves as trustee, and he disclaims beneficial ownership except to the extent of his pecuniary interest.

Insider Trade Summary

1,200 shares gifted

Gift 2 txns

Insider Sullivan John James

Role Director

Type	Security	Shares	Price	Value
Gift	Common Stock	1,200	$0.00	$0.00
holding	Common Stock F1	--	--	--

Holdings After Transaction: Common Stock — 19,418 shares (Direct); Common Stock — 45,110 shares (Indirect, By Trust)

Footnotes (1)

1. F1. Represents shares held by the "Sullivan Family Trust" for which the reporting person's spouse serves as Trustee. The reporting person disclaims beneficial ownership of the securities held by the trust except to the extent of his pecuniary interest therein

Key Figures

Common shares gifted: 1,200 shares Reported per-share price: $0.0000 per share Direct shares after transfer: 19,418 shares +1 more

4 metrics

Common shares gifted 1,200 shares October 13, 2026

Reported per-share price $0.0000 per share Gift transfer on October 13, 2026

Direct shares after transfer 19,418 shares Reported after the October 13, 2026 transfer

Sullivan Family Trust shares 45,110 shares Sullivan's spouse serves as trustee; Sullivan disclaims beneficial ownership except to the extent of his pecuniary interest

Key Terms

Bona fide gift, beneficial ownership, pecuniary interest

3 terms

Bona fide gift financial

"Bona fide gift"

A bona fide gift is a genuine, voluntary transfer of money, property, or benefits from one party to another made without expectation of repayment, services, or hidden conditions. Investors care because such gifts can affect company disclosures, related‑party transaction rules, tax treatment, and perceived conflicts of interest; think of it like someone giving you a present with no strings attached — but on a corporate scale, auditors and regulators need to verify it really is unconditional.

beneficial ownership financial

"disclaims beneficial ownership of the securities held by the trust"

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.

pecuniary interest financial

"except to the extent of his pecuniary interest therein"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many MLAB shares did director John James Sullivan give as a gift?

Mesa Laboratories director John James Sullivan transferred 1,200 common shares as a bona fide gift on October 13, 2026, reported at $0.0000 per share. He held 19,418 shares directly afterward.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/29/2026 - 06:36 PM EDT Accepted by SEC EDGAR 10/29/2026 - 06:35 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Sullivan John James

(Last) (First) (Middle)

12100 W. 6TH AVENUE

(Street)

LAKEWOOD COLORADO 80228

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MESA LABORATORIES INC /CO/ [ MLAB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/13/2026		G		1,200	D	$0	19,418	D
Common Stock								45,110	I	By Trust(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares held by the "Sullivan Family Trust" for which the reporting person's spouse serves as Trustee. The reporting person disclaims beneficial ownership of the securities held by the trust except to the extent of his pecuniary interest therein

	John Sakys under Power of Attorney by John Sullivan	10/29/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)