13F reference period
Q2 2026
Security Snapshot
MESA LABORATORIES INC /CO/ - Common Stock (MLAB) Institutional Ownership
CUSIP: 59064R109
13F Institutional Holders and Ownership History from Q1 2014 to Q3 2026
Institutions Reporting
159
Shares (Excl. Options)
5.03M
Full value: 5,031,409 · shares · 30 Jun 2026Price
$99.55
The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.
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- Security type / class
- Equity / Common Stock
- Symbol
- MLAB on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 5,031,409
- Total 13F value
- $500,781,809
- Portfolio coverage rank
- 0%
- Share change
- +250,520
- Value change
- +$29,316,869
- Number of holders
- 159
- Shares outstanding
- 5,615,975
- SEC-reported price per share
- $129.94
- Insider filing price
- $129.94
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- MLAB - MESA LABORATORIES INC /CO/ - Common Stock is tracked under CUSIP 59064R109.
- 159 institutions reported positions in Q2 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 161 to 159 between Q1 2026 and Q2 2026.
- SEC-reported value moved from to
$426.62M
Full value: $426,617,348 · USD · 31 Mar 2026.$500.78M
Full value: $500,781,809 · USD · 30 Jun 2026
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 159 institutions filings for Q2 2026.
Security key
59064R109
13F reference period
Q2 2026
13F holders
159
13D/G owners
5
CIK / CUSIP context first
Open Q2 2026 holders
MLAB full holder history
MESA LABORATORIES INC /CO/ SEC filings
MESA LABORATORIES INC /CO/ company facts
MESA LABORATORIES INC /CO/ insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 59064R109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
MLAB
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Conestoga Capital Advisors, LLC | 11% | $71,997,569 | 618,111 | Conestoga Capital Advisors | 31 Dec 2024 | |||
| Long Path Smaller Companies Fund, LP | 8.6% | +19% | $47,497,893 | +$7,122,106 | 477,126 | +18% | Long Path Smaller Companies Fund, LP | 30 Jun 2026 |
| BlackRock, Inc. | 7.9% | +14% | $57,649,440 | +$8,415,564 | 443,662 | +17% | BlackRock, Inc. | 30 Sep 2026 |
| WASATCH ADVISORS LP | 6.9% | $50,303,775 | 387,129 | Wasatch Advisors LP | 30 Sep 2026 | |||
| ROYCE & ASSOCIATES LP | 5% | -6% | $31,579,825 | -$1,874,047 | 271,118 | -5.6% | ROYCE & ASSOCIATES LP | 31 Mar 2025 |
As of 30 Jun 2026,
159
institutional investors reported holding
shares of
MESA LABORATORIES INC /CO/ - Common Stock (MLAB).
This represents
90%
of the company’s total
outstanding shares.
5.03M
Full value: 5,031,409 · shares · 30 Jun 20265.62M
Full value: 5,615,975 · shares · Stored outstanding share count13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
69%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Long Path Partners LP | 8.5% | 477,126 | +18% | 20% | $47,497,893 |
| BlackRock, Inc. | 7.8% | 440,552 | +12% | 0% | $43,856,952 |
| Boston Partners | 4.7% | 265,149 | -1.3% | 0.02% | $26,391,020 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.2% | 237,457 | +2.1% | 0% | $23,638,844 |
| AQR CAPITAL MANAGEMENT LLC | 3.6% | 203,739 | +19% | 0.01% | $20,282,240 |
| Ranger Investment Management, L.P. | 3.1% | 173,988 | -14% | 1.1% | $17,320,505 |
| MORGAN STANLEY | 2.8% | 156,979 | -3.2% | 0% | $15,627,368 |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 2.8% | 155,771 | +0.3% | 0.12% | $15,507,003 |
| RAYMOND JAMES FINANCIAL INC | 2.7% | 149,937 | +22% | 0% | $14,926,243 |
| DIMENSIONAL FUND ADVISORS LP | 2.6% | 148,395 | +19% | 0% | $14,772,712 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5% | 139,682 | +9.1% | 0% | $13,909,131 |
| KENNEDY CAPITAL MANAGEMENT LLC | 2.5% | 138,301 | -2.8% | 0.24% | $13,767,865 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 2.3% | 130,838 | +195% | 0.05% | $13,024,923 |
| STATE STREET CORP | 2.2% | 124,292 | +1.8% | 0% | $12,373,148 |
| Russell Investments Group, Ltd. | 2.2% | 121,845 | -9.8% | 0.01% | $12,129,687 |
| WASATCH ADVISORS LP | 2.1% | 115,668 | +126% | 0.08% | $11,514,749 |
| ROYCE & ASSOCIATES LP | 2% | 113,395 | -30% | 0.09% | $11,288,472 |
| CRAWFORD INVESTMENT COUNSEL INC | 1.8% | 98,805 | +3.4% | 0.16% | $9,836,038 |
| FMR LLC | 1.6% | 88,857 | +1273% | 0% | $8,845,714 |
| D. E. Shaw & Co., Inc. | 1.5% | 81,755 | +50% | 0.01% | $8,138,710 |
| JANE STREET GROUP, LLC | 1.3% | 71,580 | 0% | $7,125,789 | |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.2% | 69,350 | +32% | 0% | $6,903,793 |
| Meros Investment Management, LP | 1.2% | 67,962 | -0.1% | 2.1% | $6,765,617 |
| NORTHERN TRUST CORP | 1.2% | 65,745 | -5.1% | 0% | $6,544,915 |
| GOLDMAN SACHS GROUP INC | 1.1% | 64,322 | -8.9% | 0% | $6,403,255 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
51
Headline period
Q2 2026
Rows shown
1-25 of 51
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 417,668 | $54,257,598 | +$32,067,581 | $129.94 | 26 |
| 2026 Q2 | 5,031,409 | $500,781,809 | +$29,316,869 | $99.55 | 159 |
| 2026 Q1 | 4,827,841 | $426,617,348 | +$11,849,291 | $88.42 | 161 |
| 2025 Q4 | 4,741,474 | $372,211,358 | +$2,391,653 | $78.50 | 158 |
| 2025 Q3 | 4,981,288 | $333,781,447 | -$17,563,084 | $67.01 | 139 |
| 2025 Q2 | 5,194,339 | $489,420,814 | +$3,151,880 | $94.22 | 154 |
| 2025 Q1 | 5,170,743 | $613,627,994 | +$6,492,344 | $118.66 | 151 |
| 2024 Q4 | 5,103,701 | $673,040,010 | +$27,103,138 | $131.87 | 156 |
| 2024 Q3 | 4,893,266 | $633,592,675 | -$1,799,578 | $129.86 | 165 |
| 2024 Q2 | 4,891,845 | $424,757,234 | -$2,285,633 | $86.77 | 150 |
| 2024 Q1 | 4,866,455 | $534,319,569 | +$2,912,009 | $109.73 | 154 |
| 2023 Q4 | 4,844,406 | $507,454,547 | -$6,592,200 | $104.77 | 158 |
| 2023 Q3 | 4,901,538 | $515,000,677 | +$6,025,097 | $105.07 | 152 |
| 2023 Q2 | 4,832,223 | $620,943,111 | -$24,453,662 | $128.50 | 157 |
| 2023 Q1 | 5,023,401 | $877,732,676 | -$2,517,173 | $174.73 | 157 |
| 2022 Q4 | 5,085,374 | $846,760,262 | +$70,304,664 | $166.21 | 155 |
| 2022 Q3 | 4,842,604 | $681,105,708 | -$11,702,600 | $140.83 | 159 |
| 2022 Q2 | 4,908,949 | $1,000,923,113 | +$11,794,155 | $203.94 | 168 |
| 2022 Q1 | 4,859,392 | $1,238,083,828 | +$14,735,450 | $254.88 | 168 |
| 2021 Q4 | 4,791,533 | $1,570,225,457 | +$6,590,466 | $328.09 | 173 |
| 2021 Q3 | 4,766,186 | $1,441,093,898 | +$17,124,814 | $302.36 | 171 |
| 2021 Q2 | 4,707,819 | $1,276,759,656 | +$27,150,060 | $271.17 | 157 |
| 2021 Q1 | 4,611,973 | $1,124,183,042 | -$29,099,250 | $243.50 | 171 |
| 2020 Q4 | 4,708,471 | $1,349,635,260 | -$19,634,872 | $286.64 | 174 |
| 2020 Q3 | 4,781,094 | $1,219,323,749 | +$30,338,136 | $254.76 | 152 |