STOCK TITAN

Mesa Laboratories (NASDAQ: MLAB) director now holds 6,973 shares

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(Neutral)
Form Type
4

Rhea-AI Filing Summary

Mesa Laboratories, Inc. (MLAB) director Shannon Hall reported the vesting and settlement of 2,784 Restricted Stock Units into an equal number of shares of common stock on August 15, 2026. The derivative RSU position was reduced to zero, and Hall now directly holds 6,973 shares of common stock.

Positive

  • None.

Negative

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Insider Hall Shannon
Role Director
Type Security Shares Price Value
Exercise Restricted Stock Units - 8 F1, F2, F3 2,784 $0.00 $0.00
Exercise Common Stock 2,784 $0.00 $0.00
Holdings After Transaction: Restricted Stock Units - 8 — 0 shares (Direct); Common Stock — 6,973 shares (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 vested on August 15, 2026
  3. F3. Not Applicable
RSUs exercised/converted 2,784 shares Restricted Stock Units converted into common stock on August 15, 2026
Common shares acquired from RSUs 2,784 shares Common Stock position received upon RSU vesting and settlement
Post-transaction common stock holding 6,973 shares Direct ownership after RSU conversion on August 15, 2026
RSU transaction price per share $0.0000 Reported transaction price per share for RSU exercise/conversion
Derivative RSUs following transaction 0 shares Restricted Stock Units position after vesting and conversion
Exercise transactions reported 1 transaction Exercise or conversion of derivative security (code M)
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.
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
Rule 10b5-1 trading plan regulatory
"Footnotes may reference Rule 10b5-1 trading plans"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

FAQ

What insider transaction did Shannon Hall report for MLAB on August 15, 2026?

Shannon Hall reported the exercise of 2,784 Restricted Stock Units, which converted into 2,784 shares of Mesa Laboratories common stock. The RSUs vested on August 15, 2026, and the corresponding derivative position was eliminated.

How many Mesa Laboratories (MLAB) RSUs did Shannon Hall convert to common stock?

Shannon Hall converted 2,784 Restricted Stock Units into 2,784 shares of Mesa Laboratories common stock. Each RSU represented a contingent right to receive one share, and these RSUs vested on August 15, 2026.

What is Shannon Hall’s direct common stock holding in MLAB after this Form 4?

After the reported transactions, Shannon Hall directly holds 6,973 shares of Mesa Laboratories common stock. This reflects the addition of 2,784 shares received upon RSU vesting and settlement on August 15, 2026.

Was the Mesa Laboratories (MLAB) RSU conversion reported at a per-share price?

The RSU conversion was reported at a transaction price per share of $0.0000, consistent with RSUs delivered as equity compensation. Footnotes clarify that each RSU represented a right to receive one share upon vesting.

Were Shannon Hall’s MLAB transactions under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox was not marked as affirmative, indicating the reported transactions were not designated as made pursuant to a Rule 10b5-1 trading plan based on the Form 4’s trading-plan checkbox field.

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

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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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*
Hall Shannon

(Last)(First)(Middle)
123 CLEARFIELD DRIVE

(Street)
SAN FRANCISCO CALIFORNIA 94132

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/15/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock08/15/2026M2,784A$06,973D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units - 8(1)08/15/2026M2,784 (2) (3)Common Stock2,784$00D
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, 2026
3. Not Applicable
John Sakys under Power of Attorney by Shannon Hall08/17/2026
** Signature of Reporting PersonDate
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)