MLAB Form 4: Director converts RSUs, discloses trust-held 44,780 shares

Rhea-AI Filing Summary

John James Sullivan, a director of Mesa Laboratories, reported transactions dated 08/15/2025 related to his company equity awards and holdings. The filing shows 1,404 restricted stock units (RSUs) vested and were converted into 1,404 shares with a reported price of $0, increasing his direct common stock holdings to 27,282 shares. The report also records an additional grant of 2,784 RSUs that vest on 08/15/2026 and are reported as 2,784 shares of direct beneficial ownership once settled. Separately, 44,780 shares are held indirectly via a spousal lifetime access trust. All transactions were reported on Form 4 and appear to be routine equity compensation activity by an insider.

Positive

• Director alignment: 1,404 vested RSUs converted to shares increasing the director's direct stake to 27,282 shares
• Substantial indirect ownership: 44,780 shares held via a spousal lifetime access trust, indicating meaningful insider ownership
• Forward-looking grants disclosed: 2,784 RSUs granted that vest on 08/15/2026, showing continued equity-based compensation

Negative

• None.

Insights

Financial Analyst

TL;DR: Director received vested RSUs converted to 1,404 shares and owns substantial direct and trust-held stock; routine compensation, limited market impact.

The filing documents standard equity compensation activity: 1,404 RSUs vested and converted into shares on 08/15/2025 and an additional 2,784 RSUs granted that vest in 2026. The director holds 27,282 shares directly after the conversion and 44,780 shares indirectly via a spousal trust. No cash purchase price is reported for the vested RSUs, indicating settlement of awards rather than open-market buys. For investors, this is a routine insider ownership update rather than a material change to capital structure.

Corporate Governance Expert

TL;DR: Insider reported routine equity award vesting and a future-vesting grant; aligns director interests with shareholders, not a governance red flag.

The Form 4 indicates customary compensation-driven ownership adjustments: vested RSUs converted to 1,404 shares and a separate award of 2,784 RSUs that vest next year. Indirect holdings via a spousal lifetime access trust amount to 44,780 shares, which is disclosed appropriately. There are no indications of problematic related-party transfers or unusual timing; disclosures appear complete for this transaction set.

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 CO 80228

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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

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

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

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	08/15/2025		M		1,404	A	$0	27,282	D
Common Stock								44,780	I	By Trust(5)

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
Restricted Stock Units - 9	(1)	08/15/2025		M			1,404	(2)	(3)	Common Stock	1,404	$0	0	D
Restricted Stock Units - 10	(1)	08/15/2025		A		2,784		(4)	(3)	Common Stock	2,784	$0	2,784	D

Explanation of Responses:

1. Each RSU represents a contingent right to receive one share of the Issuer's common stock

2. RSUs that vested on August 15, 2025

3. Not Applicable

4. RSUs that vest on August 15, 2026

5. Represents shares held in a spousal lifetime access trust

	John Sakys under Power of Attorney by John Sullivan	08/15/2025
	** 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.

FAQ

What transactions did the Mesa Laboratories (MLAB) director report on 08/15/2025?

The director reported 1,404 RSUs vested and converted to 1,404 shares and a grant of 2,784 RSUs that vest on 08/15/2026.

How many Mesa Laboratories shares does John James Sullivan directly and indirectly own after the reported transactions?

After the transactions he directly owns 27,282 shares and indirectly holds 44,780 shares via a spousal lifetime access trust.

Was there any cash paid for the vested RSUs reported by the insider?

No cash price is reported for the vested RSUs; the filing lists a price of $0 for the converted RSUs.

Does the Form 4 indicate any unusual or non-routine transfers by the insider?

No; the filing describes routine vesting and a standard future-vesting grant and discloses indirect holdings via a trust.

When do the newly granted RSUs vest?

The granted 2,784 RSUs are scheduled to vest on 08/15/2026 according to the filing.