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

Latest Period

Q4 2025

Institutions Reporting

157

Shares (Excl. Options)

4,741,460

Price

$78.50

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Type / Class
Equity / Common Stock, no par value
Symbol
MLAB on Nasdaq
Shares outstanding
5,555,932
Price per share
$88.42
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
4,741,460
Total reported value
$372,210,259
% of total 13F portfolios
0%
Share change
-68,638
Value change
+$2,391,103
Number of holders
157
Price from insider filings
$88.42
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Quick Takeaways

  • MLAB - MESA LABORATORIES INC /CO/ - Common Stock, no par value is tracked under CUSIP 59064R109.
  • 157 institutions reported positions in Q4 2025.
  • 4 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 157 to 26 between Q4 2025 and Q1 2026.
  • Reported value moved from $372,210,259 to $7,093,421.

Why This Matters

  • 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.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 157 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 59064R109?
CUSIP 59064R109 identifies MLAB - MESA LABORATORIES INC /CO/ - Common Stock, no par value in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

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 Dec 2025, 157 institutional investors reported holding 4,741,460 shares of MESA LABORATORIES INC /CO/ - Common Stock, no par value (MLAB). This represents 85% 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 65% 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
BlackRock, Inc. 7.2% 398,666 +2.5% 0% $31,295,283
VANGUARD GROUP INC 5.8% 321,899 +0.06% 0% $25,269,072
Long Path Partners LP 4.1% 227,223 6.1% $17,837,006
Boston Partners 3.8% 213,376 +87% 0.02% $16,751,917
Select Equity Group, L.P. 3.7% 206,435 +63% 0.08% $16,205,148
Ranger Investment Management, L.P. 3.7% 205,263 -2.1% 1.1% $16,113,146
GENEVA CAPITAL MANAGEMENT LLC 3.2% 178,713 -6.6% 0.26% $14,028,948
MORGAN STANLEY 3.2% 175,589 -31% 0% $13,783,817
ROYCE & ASSOCIATES LP 2.8% 153,352 +3.2% 0.12% $12,038,132
KENNEDY CAPITAL MANAGEMENT LLC 2.6% 144,606 +19% 0.24% $11,351,571
DIAMOND HILL CAPITAL MANAGEMENT INC 2.6% 141,973 +15% 0.06% $11,144,881
GEODE CAPITAL MANAGEMENT, LLC 2.3% 127,950 +0.07% 0% $10,046,267
STATE STREET CORP 2.2% 120,641 +1.4% 0% $9,470,319
JANUS HENDERSON GROUP PLC 2.1% 116,642 -20% 0% $9,156,397
DIMENSIONAL FUND ADVISORS LP 2.1% 116,363 -0.35% 0% $9,134,552
Russell Investments Group, Ltd. 2.1% 116,337 +17% 0.01% $9,132,508
RAYMOND JAMES FINANCIAL INC 1.8% 100,397 +112% 0% $7,886,726
Meros Investment Management, LP 1.5% 85,017 +11% 2.6% $6,673,835
CRAWFORD INVESTMENT COUNSEL INC 1.5% 81,220 -1.5% 0.11% $6,375,770
D. E. Shaw & Co., Inc. 1.4% 76,565 +133% 0% $6,010,353
MASON CAPITAL MANAGEMENT LLC 1.3% 70,300 0% 0.98% $5,518,550
AQR CAPITAL MANAGEMENT LLC 1.3% 70,138 +115% 0% $5,505,835
NORTHERN TRUST CORP 1.2% 65,651 -8.8% 0% $5,153,605
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 1.1% 61,913 +13% 0% $4,860,171
GABELLI FUNDS LLC 1.1% 60,724 +13% 0.03% $4,766,834

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 80,136 $7,093,421 +$5,070,722 $88.42 26
2025 Q4 4,741,460 $372,210,259 +$2,391,103 $78.50 157
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
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