Latest Period
Q1 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 Q1 2026
Institutions Reporting
159
Shares (Excl. Options)
4,824,431
Price
$88.42
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- Security type / class
- Equity / Common Stock, no par value
- Symbol
- MLAB on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 4,824,431
- Total 13F value
- $426,315,836
- Portfolio coverage rank
- 0%
- Share change
- +88,010
- Value change
- +$11,851,440
- Number of holders
- 159
- Shares outstanding
- 5,555,932
- SEC-reported price per share
- $90.80
- Insider filing price
- $90.80
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.
- 159 institutions reported positions in Q1 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 158 to 159 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $372,211,358 to $426,315,836.
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 Q1 2026.
Security key
59064R109
Latest holder period
Q1 2026
13F holders
159
13D/G owners
4
CIK / CUSIP context first
Open Q1 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 | 7.3% | +28% | $35,870,044 | +$8,302,813 | 405,583 | +30% | Long Path Smaller Companies Fund, LP | 31 Mar 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 31 Mar 2026, 159 institutional investors reported holding 4,824,431 shares of MESA LABORATORIES INC /CO/ - Common Stock, no par value (MLAB). This represents 87% of the company’s total 5,555,932 outstanding shares.
13F 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 | 7.3% | 405,583 | +78% | 16% | $35,861,649 |
| BlackRock, Inc. | 7.1% | 393,851 | -1.2% | 0% | $34,824,305 |
| Boston Partners | 4.8% | 268,711 | +26% | 0.03% | $23,762,126 |
| Select Equity Group, L.P. | 4.2% | 235,885 | +14% | 0.11% | $20,856,952 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.2% | 232,643 | 0% | 0% | $20,570,294 |
| Ranger Investment Management, L.P. | 3.7% | 202,903 | -1.1% | 1.3% | $17,940,683 |
| AQR CAPITAL MANAGEMENT LLC | 3.1% | 170,562 | +143% | 0.01% | $15,081,098 |
| MORGAN STANLEY | 2.9% | 162,116 | -7.7% | 0% | $14,334,351 |
| ROYCE & ASSOCIATES LP | 2.9% | 161,229 | +5.1% | 0.14% | $14,255,868 |
| DIAMOND HILL CAPITAL MANAGEMENT INC | 2.8% | 155,302 | +9.4% | 0.09% | $13,731,803 |
| KENNEDY CAPITAL MANAGEMENT LLC | 2.6% | 142,343 | -1.6% | 0.27% | $12,585,968 |
| Russell Investments Group, Ltd. | 2.4% | 135,069 | +16% | 0.01% | $11,942,874 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3% | 128,002 | +0.04% | 0% | $11,321,083 |
| DIMENSIONAL FUND ADVISORS LP | 2.2% | 124,630 | +7.1% | 0% | $11,017,953 |
| RAYMOND JAMES FINANCIAL INC | 2.2% | 122,911 | +22% | 0% | $10,691,384 |
| STATE STREET CORP | 2.2% | 122,068 | +1.2% | 0% | $10,793,253 |
| MONIMUS CAPITAL MANAGEMENT, LP | 1.8% | 101,292 | +148% | 2.5% | $8,956,239 |
| CRAWFORD INVESTMENT COUNSEL INC | 1.7% | 95,535 | +18% | 0.14% | $8,447,205 |
| Roubaix Capital, LLC | 1.3% | 72,115 | +31% | 3% | $6,376,408 |
| GOLDMAN SACHS GROUP INC | 1.3% | 70,617 | +28% | 0% | $6,243,956 |
| JANUS HENDERSON GROUP PLC | 1.2% | 69,401 | -41% | 0% | $6,136,436 |
| NORTHERN TRUST CORP | 1.2% | 69,264 | +5.5% | 0% | $6,124,324 |
| Meros Investment Management, LP | 1.2% | 68,032 | -20% | 2.6% | $6,015,389 |
| GABELLI FUNDS LLC | 1.1% | 62,499 | +2.9% | 0.04% | $5,526,162 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.1% | 62,424 | +0.83% | 0% | $5,519,530 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 4,824,431 | $426,315,836 | +$11,851,440 | $88.42 | 159 |
| 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 |
| 2020 Q1 | 4,158,000 | $940,428,089 | +$24,185,487 | $226.09 | 143 |