Key facts
- This page summarizes John James Sullivan's Form 4 filing for MESA LABORATORIES INC /CO/ (MLAB).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 05 Dec 2025, 11:10.
John James Sullivan - 02 Dec 2025 Form 4 Insider Report for MESA LABORATORIES INC /CO/ (MLAB)
- Reporting relationship
- Director
- Issuer ticker
- MLAB
- Reported as of
- 02 Dec 2025
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 05 Dec 2025, 11:10:57 UTC
- Prior SEC filing
- 18 Aug 2025
- Source filing
- View source filing
- Reporting owner signature
- John Sakys under Power of Attorney by John Sullivan
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
John James Sullivan filed Form 4 for MESA LABORATORIES INC /CO/ (MLAB) on 05 Dec 2025.
Change
- Previous filing in this sequence was filed on 18 Aug 2025.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001305784
Primary reporting owner
Sullivan John James
- Relationship
- Director
- Address
- 12100 W. 6TH AVENUE, LAKEWOOD
- Signature
- John Sakys under Power of Attorney by John Sullivan
- Signature date
- 05 Dec 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
MLAB
transaction
Common Stock
Gift
- Transaction value
- $0
- Shares
- -2,000
- Change %
- -7.3%
- Price
- $0.000000
- Shares after
- 25,282
- Date
- 02 Dec 2025
- Ownership
- Direct
MLAB
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 44,780
- Date
- 02 Dec 2025
- Ownership
- By Trust
- Footnotes
- F1
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 1 footnote
Footnote F1
Represents shares held in a spousal lifetime access trust