Security key
59064R109
MESA LABORATORIES INC /CO/ - Common Stock, no par value (MLAB)
CUSIP: 59064R109
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock, no par value
- Total 13F shares
- 4,824,431
- Total 13F value
- $426,315,836
- Share change
- +88,010
- SEC-reported price per share
- $88.42
- Number of holders
- 159
- Value change
- +$11,851,440
- Number of buys
- 82
- Number of sells
- 59
- Shares outstanding
- 5,555,932
Holder snapshot
6 signals
Security identity
1 source field
Report period
Q1 2026
Institutions
159
Top holders
10
MLAB full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q4 2025
MESA LABORATORIES INC /CO/ SEC filings
MESA LABORATORIES INC /CO/ company facts
Broader feeds
Reporting periods
Holder history for CUSIP 59064R109
Recent filing periods:
Ownership snapshot
Top reported holders of MLAB - MESA LABORATORIES INC /CO/ - Common Stock, no par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Conestoga Capital Advisor...
Disclosed value leader
Conestoga Capital Advisor...
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 11%
13D/G row: Conestoga Capital Advisors, LLC
Showing 1-6 of 15 holder rows.
Quick read
Conestoga Capital Advisors, LLC leads the comparable SEC ownership view at 11%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Comparable ownership
Top 5
Conestoga Capital Advisors, LLC
11%
Long Path Smaller Companies Fund, LP
7.3%
BlackRock, Inc.
6.9%
ROYCE & ASSOCIATES LP
5%
VANGUARD GROUP INC
5.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Conestoga Capital Advisors, LLC |
13D/G
Conestoga Capital Advisors
|
11%
|
$71,997,569
618,111 shares
|
$0 | 31 Dec 2024 |
| Long Path Smaller Companies Fund, LP |
13D/G
|
7.3%
|
$35,870,044
405,583 shares
|
+$8,302,813 | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6.9%
from 13D/G
|
$31,295,283
398,666 shares
|
— | 31 Dec 2025 |
| ROYCE & ASSOCIATES LP |
13D/G
13F
Company
|
5%
|
$31,579,825
271,118 shares
|
-$1,874,047 | 31 Mar 2025 |
| VANGUARD GROUP INC |
13F
Company
|
5.8%
|
$25,269,072
321,899 shares
|
— | 31 Dec 2025 |
| Long Path Partners LP |
13F
Company
|
4.1%
|
$17,837,006
227,223 shares
|
— | 31 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
159
Shares
4,824,431
Rows available
159
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
158
Q1 2026 holders
159
Holder diff
1
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend