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Mesa Laboratories (MLAB) CFO exercises awards and receives 8,416 RSUs

Filing Impact
(High)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Mesa Laboratories CFO John Sakys reported compensation-related equity changes. He exercised derivative awards to acquire 2,717 shares of common stock, bringing his direct holdings to 17,761 shares. He also received a grant of 8,416 restricted stock units, each representing one future share of common stock.

In addition, 3,951 non-qualified stock options with a $226.72 exercise price reached expiration. Sakys also reports 50 shares of common stock held indirectly as custodian for his children.

Positive

  • None.

Negative

  • None.
Insider Sakys John
Role CFO
Type Security Shares Price Value
E Non Qualified Stock Option 3,951 $0.00 --
Exercise Restricted Stock Units 8 2,717 $0.00 --
Grant/Award Restricted Stock Units - 9 8,416 $0.00 --
Exercise Common Stock 2,717 $104.08 $283K
holding Common Stock -- -- --
Holdings After Transaction: Non Qualified Stock Option — 15,755 shares (Direct, null); Restricted Stock Units 8 — 5,416 shares (Direct, null); Restricted Stock Units - 9 — 8,416 shares (Direct, null); Common Stock — 17,761 shares (Direct, null); Common Stock — 50 shares (Indirect, Custodian)
Footnotes (1)
  1. NSOs that vested 1/3 on each anniversary date of the June 15, 2020 grant date Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 15, 2026 and each of the next two anniversary dates Not Applicable RSUs that vest 34% on June 15, 2027, 33% on June 8, 2028 and 33% on June 8, 2029 Consists of 50 shares held by children on which Mr. Sakys is custodian
Common shares acquired 2,717 shares Common Stock from derivative exercise on June 15, 2026
Direct common shares after transaction 17,761 shares Direct ownership following acquisition on June 15, 2026
RSUs granted 8,416 units Restricted Stock Units - 9 granted June 15, 2026
Options expired 3,951 options Non Qualified Stock Option expiration on June 15, 2026
Option exercise price $226.72 per share Conversion or exercise price of expired options
Options remaining after expiration 15,755 options Non Qualified Stock Option position after expiration
Indirect custodian shares 50 shares Common Stock held for children as custodian
RSU underlying shares 8,416 shares Common Stock underlying new RSU grant
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.
Non Qualified Stock Option financial
"Non Qualified Stock Option with a conversion or exercise price of 226.7200"
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.
custodian financial
"Consists of 50 shares held by children on which Mr. Sakys is custodian"
A custodian is a financial institution that holds and safeguards an investor's assets—such as stocks, bonds, or cash—and records transactions on the investor's behalf. Think of it as a trusted caretaker or safe-deposit box for investments; it helps prevent loss or theft, handles paperwork and transfers, and provides transparency and regulatory checks, so investors can focus on decisions rather than the mechanics or security of asset storage.
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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*
Sakys John

(Last)(First)(Middle)
MESA LABORATORIES, INC.
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)
Director10% Owner
XOfficer (give title below)Other (specify below)
CFO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026
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 Stock06/15/2026M2,717A$104.0817,761D
Common Stock50ICustodian(6)
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
Non Qualified Stock Option$226.7206/15/2026E3,95106/15/2021(1)06/15/2026Common Stock3,951$015,755D
Restricted Stock Units 8(2)06/15/2026M2,717 (3) (4)Common Stock2,717$05,416D
Restricted Stock Units - 9(2)06/15/2026A8,41606/15/2027(5) (4)Common Stock8,416$08,416D
Explanation of Responses:
1. NSOs that vested 1/3 on each anniversary date of the June 15, 2020 grant date
2. Each RSU represents a contingent right to receive one share of the Issuer's common stock
3. RSUs that vest 1/3 on June 15, 2026 and each of the next two anniversary dates
4. Not Applicable
5. RSUs that vest 34% on June 15, 2027, 33% on June 8, 2028 and 33% on June 8, 2029
6. Consists of 50 shares held by children on which Mr. Sakys is custodian
John Sakys06/16/2026
** 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)

FAQ

What did Mesa Laboratories (MLAB) CFO John Sakys do in this Form 4 filing?

CFO John Sakys reported compensation-related equity activity. He acquired 2,717 Mesa Laboratories common shares through a derivative exercise and received 8,416 new restricted stock units, while 3,951 older stock options expired without being exercised.

How many Mesa Laboratories (MLAB) shares does the CFO hold after these transactions?

After the reported transactions, John Sakys directly holds 17,761 Mesa Laboratories common shares. This reflects the 2,717-share acquisition from exercising derivative awards, in addition to his prior direct holdings reported in the same Form 4 filing.

What restricted stock units did Mesa Laboratories (MLAB) grant to its CFO?

John Sakys received 8,416 restricted stock units, each representing a contingent right to one Mesa Laboratories common share. The footnotes indicate these RSUs vest in scheduled tranches over several future dates rather than becoming fully vested immediately.

Which Mesa Laboratories (MLAB) stock options expired in this Form 4?

The Form 4 shows 3,951 non-qualified stock options expiring. These options carried a conversion or exercise price of $226.72 per share and were tied to an earlier grant that vested over time before ultimately reaching their expiration date.

Does the Mesa Laboratories (MLAB) CFO report any indirect share holdings?

Yes. The filing lists 50 Mesa Laboratories common shares held indirectly, with John Sakys acting as custodian for his children. These shares are reported as indirect ownership, reflecting his custodial role rather than typical direct investment holdings.