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
158
Shares (Excl. Options)
4,823,601
Price
$88.42
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- Type / Class
- Equity / Common Stock, no par value
- Symbol
- MLAB on Nasdaq
- Shares outstanding
- 5,555,932
- Price per share
- $95.76
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 4,823,601
- Total reported value
- $426,242,447
- % of total 13F portfolios
- 0%
- Share change
- +88,010
- Value change
- +$11,851,440
- Number of holders
- 158
- Price from insider filings
- $95.76
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- MLAB - MESA LABORATORIES INC /CO/ - Common Stock, no par value is tracked under CUSIP 59064R109.
- 158 institutions reported positions in Q1 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 158 to 158 between Q4 2025 and Q1 2026.
- Reported value moved from $372,211,358 to $426,242,447.
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 158 institutions filings for Q1 2026.
Security key
59064R109
Latest holder period
Q1 2026
13F holders
158
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:
Significant Owners of MESA LABORATORIES INC /CO/ - Common Stock, no par value (MLAB) based on Schedule 13D/G filings
| 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, 158 institutional investors reported holding 4,823,601 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.
Top 25 Institutional Shareholders
The largest institutional shareholders of MESA LABORATORIES INC /CO/ - Common Stock, no par value (MLAB) together control 69% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| 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 |
Institutional Holders of MESA LABORATORIES INC /CO/ - Common Stock, no par value (MLAB) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 4,823,601 | $426,242,447 | +$11,851,440 | $88.42 | 158 |
| 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 |
| 2019 Q4 | 4,041,312 | $1,008,233,406 | +$16,005,297 | $249.40 | 148 |
| 2019 Q3 | 3,977,286 | $945,348,212 | +$103,701,651 | $237.77 | 143 |
| 2019 Q2 | 3,537,340 | $864,148,089 | +$173,068,954 | $244.34 | 123 |
| 2019 Q1 | 2,846,838 | $656,211,560 | -$22,276,204 | $230.50 | 123 |
| 2018 Q4 | 2,949,130 | $614,665,135 | +$51,356,210 | $208.39 | 108 |
| 2018 Q3 | 2,706,548 | $502,397,713 | -$14,332,032 | $185.62 | 107 |
| 2018 Q2 | 2,771,715 | $585,084,122 | -$3,040,739 | $211.08 | 104 |
| 2018 Q1 | 2,804,404 | $416,447,787 | +$14,152,203 | $148.44 | 89 |
| 2017 Q4 | 2,719,043 | $338,012,086 | +$9,312,744 | $124.30 | 92 |
| 2017 Q3 | 2,635,408 | $393,551,781 | +$16,798,615 | $149.32 | 100 |
| 2017 Q2 | 2,523,332 | $361,587,528 | +$14,529,617 | $143.31 | 88 |
| 2017 Q1 | 2,422,041 | $297,178,014 | +$25,631,743 | $122.70 | 88 |
| 2016 Q4 | 2,372,056 | $291,162,725 | +$6,379,435 | $122.75 | 86 |
| 2016 Q3 | 2,320,851 | $265,398,713 | +$6,577,828 | $114.36 | 81 |
| 2016 Q2 | 2,258,248 | $277,761,577 | -$7,663,562 | $123.00 | 80 |
| 2016 Q1 | 2,323,041 | $223,758,891 | +$11,774,517 | $96.35 | 71 |
| 2015 Q4 | 2,201,892 | $218,647,592 | +$5,482,657 | $99.50 | 68 |
| 2015 Q3 | 2,144,389 | $237,921,832 | +$5,544,647 | $111.40 | 65 |
| 2015 Q2 | 2,079,654 | $184,950,755 | +$5,369,946 | $88.90 | 67 |
| 2015 Q1 | 2,027,979 | $146,359,693 | +$249,076 | $72.20 | 61 |
| 2014 Q4 | 1,947,277 | $150,544,524 | +$2,767,839 | $77.31 | 60 |
| 2014 Q3 | 1,714,464 | $99,056,623 | -$14,639,227 | $57.78 | 58 |
| 2014 Q2 | 1,880,106 | $157,808,722 | +$3,158,272 | $83.96 | 65 |
| 2014 Q1 | 1,837,414 | $165,738,471 | +$20,472,525 | $90.25 | 66 |