Mesa Laboratories grants director 1,774 RSUs

Mesa Laboratories director Jennifer Sadie Alltoft received a long-dated equity award of 1,774 RSUs vesting in 2027.

Rhea-AI Filing Summary

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

MESA LABORATORIES INC (MLAB) reported that director Jennifer Sadie Alltoft received a grant of 1,774 Restricted Stock Units (RSUs) on September 9, 2009. Each RSU represents a contingent right to receive one share of common stock and vests on September 9, 2027. After this award, she holds 1,774 RSUs directly, and no Rule 10b5-1 plan is reported.

Insider Trade Summary

Grant/Award: 1,774 shares

Grant/Award 1 txn

Insider Alltoft Jennifer Sadie

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units - 10 F1, F2, F3	1,774	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units - 10 — 1,774 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 September 9, 2027
3. F3. Not Applicable

Key Figures

RSUs granted: 1,774 units Vesting date: September 9, 2027 RSU grant price: $0.00 per unit +1 more

4 metrics

RSUs granted 1,774 units Restricted Stock Units granted to director on September 9, 2009

Vesting date September 9, 2027 RSUs vest on this date

RSU grant price $0.00 per unit Compensation grant of RSUs with no cash price per share

RSUs held after transaction 1,774 units Director’s directly held RSUs following the award

Key Terms

Restricted Stock Units, contingent right, vesting

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"

vesting financial

"RSUs that vest September 9, 2027"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

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

What insider transaction did MLAB report for director Jennifer Sadie Alltoft?

MLAB reported that director Jennifer Sadie Alltoft received 1,774 Restricted Stock Units on September 9, 2009, as a grant or award. These RSUs represent rights to receive common shares and vest on September 9, 2027, with 1,774 RSUs held directly after the transaction.

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

The filing shows a grant of 1,774 Restricted Stock Units to director Jennifer Sadie Alltoft. Following the award, her directly held RSU balance is also 1,774 units, all tied to Mesa Laboratories common stock.

What are the vesting terms of the RSUs granted to the MLAB director?

The RSUs granted to the MLAB director vest on a single date. The filing states that the 1,774 RSUs vest on September 9, 2027, at which time each RSU will convert into one share of Mesa Laboratories common stock, subject to the grant terms.

Does the RSU grant to the MLAB director involve any cash price per share?

No cash price per share is involved in the RSU grant. The transaction reports a per-unit price of $0.00 for the 1,774 RSUs, consistent with a compensation grant where shares are received upon vesting rather than purchased for cash.

Was the MLAB director’s RSU grant made under a Rule 10b5-1 trading plan?

The filing indicates no Rule 10b5-1 plan is reported for this transaction. The RSU award to the MLAB director is disclosed as a grant or award acquisition, not as a trade executed under a pre-arranged trading plan.

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

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

Alltoft Jennifer Sadie

(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)
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 - 10	(1)	09/09/2009		A		1,774		(2)	(3)	Common Stock	1,774	$0	1,774	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 September 9, 2027

3. Not Applicable

	John Sakys under Power of Attorney by Jenny Alltoft	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)