Mesa Laboratories (MLAB) CEO awarded 35,236 restricted stock units in Form 4/A

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

4/A

Rhea-AI Filing Summary

Mesa Laboratories President and CEO Siddhartha Kadia received a grant of restricted stock units that can convert into 35,236 shares of common stock. The award was recorded at a price of $0.00 per unit as a stock-based compensation grant. Each RSU represents a right to receive one share of common stock and is scheduled to vest in three equal installments, with one-third vesting on each anniversary date of the grant. Following this award, Kadia is reported as directly holding 35,236 RSUs tied to common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Kadia Siddhartha

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units - 1	35,236	$0.00	--

Holdings After Transaction: Restricted Stock Units - 1 — 35,236 shares (Direct, null)

Footnotes (1)

Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on each anniversary date Not Applicable

Key Figures

RSUs granted: 35,236 units Grant price per RSU: $0.00 per unit Underlying common shares: 35,236 shares +1 more

4 metrics

RSUs granted 35,236 units Grant of restricted stock units to President and CEO on April 14, 2026

Grant price per RSU $0.00 per unit Stock-based compensation grant, not an open-market purchase

Underlying common shares 35,236 shares Each RSU represents one share of common stock

Holdings after transaction 35,236 RSUs Total restricted stock units directly held following the award

Key Terms

Restricted Stock Units, RSUs, Grant, award, or other acquisition, Common Stock

4 terms

Restricted Stock Units financial

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

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.

RSUs financial

"RSUs that vest 1/3 on each anniversary date"

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

Common Stock financial

"underlying_security_title: 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.

Form 4 Insider Transactions: What Each Field Means →

05/19/2026 - 09:04 AM

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^*

Kadia Siddhartha

(Last)

(First)

(Middle)

7475 LUSK BOULEVARD

(Street)

SAN DIEGO

CALIFORNIA

92121

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/14/2026

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)
04/24/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units - 1	⁽¹⁾	04/14/2026		A		35,236		⁽²⁾	⁽³⁾	Common Stock	35,236	$0	35,236	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 1/3 on each anniversary date

3. Not Applicable

	John Sakys under Power of Attorney by Siddhartha Kadia	05/19/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did MLAB President and CEO Siddhartha Kadia report?

Siddhartha Kadia reported receiving a grant of 35,236 restricted stock units. These RSUs are stock-based compensation that can each convert into one share of Mesa Laboratories common stock, increasing his direct equity-linked position with the company over time as the units vest.

How many Mesa Laboratories (MLAB) RSUs were granted in this Form 4/A?

The filing shows a grant of 35,236 restricted stock units. Each unit represents a contingent right to receive one share of Mesa Laboratories common stock, so the award corresponds to 35,236 underlying shares if fully vested and settled according to its terms.

At what price were the MLAB restricted stock units granted to the CEO?

The restricted stock units were reported at a transaction price of $0.00 per unit. This indicates a stock-based compensation award rather than an open-market purchase, with value tied to Mesa Laboratories’ share price as the RSUs vest and convert into common stock.

What are the vesting terms of the MLAB restricted stock units granted?

The RSUs vest in three equal installments, with one-third vesting on each anniversary of the grant date. This structure encourages longer-term alignment, as the CEO receives underlying common shares over several years rather than all at once, assuming continued service and satisfaction of conditions.

How many Mesa Laboratories RSUs does the CEO hold after this transaction?

After this grant, the Form 4/A reports that Siddhartha Kadia holds 35,236 restricted stock units directly. Each RSU corresponds to one share of common stock, so this represents his current RSU-based position from this award as reflected in the filing.