Latest Period
Q2 2026
Security Snapshot
MESA LABORATORIES INC /CO/ - Common Stock, no par value (MLAB) Institutional Ownership
CUSIP: 59064R109
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
157
Shares (Excl. Options)
5,029,773
Price
$99.55
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- Security type / class
- Equity / Common Stock, no par value
- Symbol
- MLAB on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 5,029,773
- Total 13F value
- $500,618,945
- Portfolio coverage rank
- 0%
- Share change
- +249,178
- Value change
- +$29,183,274
- Number of holders
- 157
- Shares outstanding
- 5,547,977
- SEC-reported price per share
- $101.04
- Insider filing price
- $101.04
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
Key facts
- MLAB - MESA LABORATORIES INC /CO/ - Common Stock, no par value is tracked under CUSIP 59064R109.
- 157 institutions reported positions in Q2 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 161 to 157 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $426,617,348 to $500,618,945.
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 157 institutions filings for Q2 2026.
Security key
59064R109
Latest holder period
Q2 2026
13F holders
157
13D/G owners
4
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
4
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. | 6.9% | -54% | $24,158,473 | -$25,762,419 | 378,897 | -52% | BlackRock, Inc. | 30 Sep 2025 |
| 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, 157 institutional investors reported holding 5,029,773 shares of MESA LABORATORIES INC /CO/ - Common Stock, no par value (MLAB). This represents 91% of the company’s total 5,547,977 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
70%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Long Path Partners LP | 8.6% | 477,126 | +18% | 20% | $47,497,893 |
| BlackRock, Inc. | 7.9% | 440,552 | +12% | 0% | $43,856,952 |
| Boston Partners | 4.8% | 265,149 | -1.3% | 0.02% | $26,391,020 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.3% | 237,457 | +2.1% | 0% | $23,638,844 |
| AQR CAPITAL MANAGEMENT LLC | 3.7% | 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 | 2.7% | 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 | 2.4% | 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 | 1.3% | 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 | 1.2% | 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
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 5,029,773 | $500,618,945 | +$29,183,274 | $99.55 | 157 |
| 2026 Q1 | 4,827,841 | $426,617,348 | +$11,849,527 | $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 |
| 2020 Q2 | 4,672,474 | $1,012,950,025 | +$111,113,576 | $216.80 | 165 |