Mesa Laboratories, Inc. (MLAB)
Nasdaq: MLAB · Industrial Instruments For Measurement, Display, and Control · Lakewood, CO · filing with the SEC since 1995
Grade5.1
◀ Past 4.8● Present 5.0▶ Future 5.6
Who owns Mesa Laboratories, Inc.
As filed with the SECHolders of 5% or more
4
Conestoga Capital Advisors holds 11.4% of Common Stock, as its SCHEDULE 13G/A filed Jan 10, 2025 says.
Directors and officers
11
report now, of 22 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
Conestoga Capital Advisors
SCHEDULE 13G/A · filed Jan 10, 2025 · Common Stock
Long Path Smaller Companies Fund, LP
SCHEDULE 13G/A · filed Jul 7, 2026 · Common Stock, no par value · 7.3% in Apr 15, 2026
Blackrock, Inc.
SCHEDULE 13G/A · filed Oct 27, 2026 · Common Stock · 6.9% in Oct 2, 2025
Wasatch Advisors LP
SCHEDULE 13G · filed Oct 9, 2026 · Common Stock SH
Royce & Associates LP
SCHEDULE 13G/A · filed Apr 30, 2025 · Common Stock · reported falling below 5%, from 5.29% in Jan 28, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%, from 5.84% in Oct 31, 2025
What MLAB reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
GKE Acquisition
A company bought · acquisition · owns, named in the 10-K filed Jun 3, 2026
16 subsidiaries in 8 countries, from the list filed with the 10-K filed Jun 3, 2026.
Insider tradesForm 4
7sales
5purchases
3sales on a scheduled plan
4people selling
$1.6Msold, in dollars
$1.4Mbought, in dollars
Open-market trades on Form 4 from Oct 29, 2025 to Oct 29, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Oct 29, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window8 of 22 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Sullivan John James | President and CEO | 1 | $800,000 | 0 | 0 | $0 |
| Sakys John | CFO | 2 | $400,000 | 1 | 0 | $0 |
| Archbold Brian David | SVP Operations | 2 | $300,000 | 1 | 0 | $0 |
| Crennen Lyndsey Elizabeth | CAO | 2 | $100,000 | 1 | 0 | $0 |
| Tripeny R Tony | director | 0 | $0 | 0 | 2 | $200,000 |
| Kadia Siddhartha | President and CEO | 0 | $0 | 0 | 1 | $800,000 |
| Capone Mark Christopher | director | 0 | $0 | 0 | 1 | $100,000 |
| Ladiwala Shiraz Shabanali | director | 0 | $0 | 0 | 1 | $300,000 |