Mesa Laboratories grants director 2,423 RSUs

A MESA LABORATORIES director received a grant of 2,423 RSUs that vest in September 2027, increasing his equity-based compensation stake.

Rhea-AI Filing Summary

MESA LABORATORIES INC (symbol: MLAB) is the issuer of record for a Form 4 filing submitted to the SEC. Capone Mark Christopher reported acquisition or exercise transactions in this Form 4 filing.

MESA LABORATORIES INC (MLAB) reported that director Mark Christopher Capone received a grant of 2,423 Restricted Stock Units (RSUs) on September 9, 2026. Each RSU represents a contingent right to receive one share of the company’s common stock and is scheduled to vest on September 9, 2027. Following this award, he holds 2,423 RSUs directly. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Grant/Award: 2,423 shares

Grant/Award 1 txn

Insider Capone Mark Christopher

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units - 4 F1, F2, F3	2,423	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units - 4 — 2,423 contracts (Direct)

Footnotes (3)

1. F1. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock
2. F2. RSUs that vest on September 9, 2027
3. F3. Not Applicable

Key Figures

RSUs granted: 2,423 units Per-unit price: $0.00 RSUs vesting date: September 9, 2027 +1 more

4 metrics

RSUs granted 2,423 units Grant of Restricted Stock Units to director on September 9, 2026

Per-unit price $0.00 Reported price for the RSU grant

RSUs vesting date September 9, 2027 Scheduled vesting date for all granted RSUs

RSUs held after transaction 2,423 units Total RSUs directly held by the director following the grant

Key Terms

Restricted Stock Units, contingent right, Common Stock

3 terms

Restricted Stock Units financial

"Each RSU represents a contingent right to receive one share"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

contingent right financial

"represents a contingent right to receive one share of the Issuer's"

Common Stock financial

"receive one share of the Issuer's Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What insider transaction did MLAB report for Mark Christopher Capone?

MLAB reported that director Mark Christopher Capone received a grant of 2,423 Restricted Stock Units on September 9, 2026, each representing a contingent right to one share of common stock, with all units vesting on September 9, 2027.

How many RSUs were granted to the MLAB director in this Form 4?

The director was granted 2,423 Restricted Stock Units. Each RSU represents a contingent right to receive one share of MESA LABORATORIES INC common stock, and all 2,423 RSUs are scheduled to vest on September 9, 2027.

When do the newly granted MLAB RSUs vest?

The RSUs granted to the MLAB director vest on September 9, 2027. Until vesting, they represent a contingent right to receive one share of common stock for each RSU, subject to the grant’s terms.

What is the exercise or conversion price of the MLAB RSUs granted?

The reported per-unit price is $0.00 because these are Restricted Stock Units, which represent a contingent right to receive shares of common stock rather than options with an exercise price.

Were the MLAB RSU transactions made under a Rule 10b5-1 trading plan?

No. The filing indicates that the Rule 10b5-1 checkbox is not marked, and there is no footnote stating that the RSU grant was made pursuant to a Rule 10b5-1 trading plan.

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

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Available on EDGAR 09/11/2026 - 02:14 PM Accepted by SEC EDGAR 09/11/2026 - 02:13 PM 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^*

Capone Mark Christopher

(Last) (First) (Middle)

320 WAKARA WAY

(Street)

SALT LAKE CITY UTAH 84108

(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)
09/09/2026

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

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 - 4	(1)	09/09/2026		A		2,423		(2)	(3)	Common Stock	2,423	$0	2,423	D

Explanation of Responses:

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

2. RSUs that vest on September 9, 2027

3. Not Applicable

	John Sakys under Power of Attorney by Mark Capone	09/11/2026
	** 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)