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Equibles

MLAB

Mesa Laboratories Inc /Co/

Company with tickers: MLAB

CIK
724004
CUSIP
59064R109
Shares Outstanding
5,524,931
13F Activity (30d)
109 filings 105 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 159
Total Value: $426,576,421
Total Shares: 4,824,435
Showing 1–100 of 159 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Superinvestors Holding MLAB

All superinvestors →
Mario Gabelli $692,682

Holder Concentration

Across 159 13F filers · Δ vs Dec 31, 2025
Top Holder
8.4%
Jun 2023 → Mar 2026 · range 8.4% – 21.9%
−0.0 pts
Top 5
31.9%
Jun 2023 → Mar 2026 · range 28.8% – 59.1%
+3.0 pts
Top 10
49.5%
Jun 2023 → Mar 2026 · range 46.9% – 78.2%
+2.6 pts
HHI
356
Jun 2023 → Mar 2026 · range 324 – 899
Broadly held+31

Quarterly Activity

vs Dec 31, 2025
New
25
Increased
61
Decreased
42
Sold Out
24
Unchanged
31
Holder count: +1
Institutional value: +14.6%
Shares held: +1.7%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Small Long Path Partners LP +178,360 405,583
Mega AQR CAPITAL MANAGEMENT LLC +100,424 170,562
Small MONIMUS CAPITAL MANAGEMENT, LP +60,450 101,292
Large Boston Partners +55,335 268,711
Large Select Equity Group, L.P. +29,450 235,885

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega CITADEL ADVISORS LLC −50,098 8,423
Mega JANUS HENDERSON GROUP PLC −47,241 69,401
Large Trexquant Investment LP −27,460 18,661
Mega D. E. Shaw & Co., Inc. −22,007 54,558
Large TUDOR INVESTMENT CORP ET AL −20,552 6,874

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 232,643 $20,570,294
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 52,586 $4,649,654
Large WASATCH ADVISORS LP 51,233 $4,530,021
Mega VANGUARD FIDUCIARY TRUST CO 38,337 $3,389,757
Large LAZARD ASSET MANAGEMENT LLC 20,328 $1,797,401

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 321,899 $25,269,071
Mid GENEVA CAPITAL MANAGEMENT LLC 178,713 $14,028,970
Small MASON CAPITAL MANAGEMENT LLC 70,300 $5,518,550
Mega JANE STREET GROUP, LLC 56,371 $4,425,123
Large Qube Research & Technologies Ltd 28,130 $2,208,205
Filter: New 25 Increased 61 Reduced 42 Sold out 24 Unchanged 31
Showing 100 of 159
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Small Long Path Partners LP $35,861,648 8.41% 405,583
Mega BlackRock, Inc. $34,824,300 8.16% 393,851
Large Boston Partners $23,759,426 5.57% 268,711
Large Select Equity Group, L.P. $20,856,951 4.89% 235,885
Mega VANGUARD CAPITAL MANAGEMENT LLC $20,570,294 4.82% 232,643
Mid Ranger Investment Management, L.P. $17,940,683 4.21% 202,903
Mega AQR CAPITAL MANAGEMENT LLC $15,081,088 3.54% 170,562
Mega MORGAN STANLEY $14,334,292 3.36% 162,116
Mid ROYCE & ASSOCIATES LP $14,255,868 3.34% 161,229
Large DIAMOND HILL CAPITAL MANAGEMENT INC $13,731,802 3.22% 155,302
Mid KENNEDY CAPITAL MANAGEMENT LLC $12,585,968 2.95% 142,343
Large Russell Investments Group, Ltd. $11,942,795 2.80% 135,069
Mega GEODE CAPITAL MANAGEMENT, LLC $11,317,936 2.65% 128,002
Mega DIMENSIONAL FUND ADVISORS LP $11,019,783 2.58% 124,630
Mega RAYMOND JAMES FINANCIAL INC $10,867,789 2.55% 122,911
Mega STATE STREET CORP $10,793,252 2.53% 122,068
Small MONIMUS CAPITAL MANAGEMENT, LP $8,956,238 2.10% 101,292
Mid CRAWFORD INVESTMENT COUNSEL INC $8,447,204 1.98% 95,535
Small Roubaix Capital, LLC $6,376,408 1.49% 72,115
Mega GOLDMAN SACHS GROUP INC $6,243,954 1.46% 70,617
Mega JANUS HENDERSON GROUP PLC $6,136,436 1.44% 69,401
Mega NORTHERN TRUST CORP Bank $6,124,320 1.44% 69,264
Small Meros Investment Management, LP $6,015,389 1.41% 68,032
Large GABELLI FUNDS LLC $5,526,161 1.30% 62,499
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $5,519,530 1.29% 62,424
Mega BANK OF AMERICA CORP /DE/ Bank $5,116,952 1.20% 57,871
Mega D. E. Shaw & Co., Inc. $4,824,018 1.13% 54,558
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $4,649,654 1.09% 52,586
Large WASATCH ADVISORS LP $4,530,021 1.06% 51,233
Small HERALD INVESTMENT MANAGEMENT Ltd $4,421,000 1.04% 50,000
Large JACOBS LEVY EQUITY MANAGEMENT, INC $3,927,351 0.92% 44,417
Mega Bank of New York Mellon Corp Bank $3,884,908 0.91% 43,937
Mega VANGUARD FIDUCIARY TRUST CO Bank $3,389,757 0.79% 38,337
Large RENAISSANCE TECHNOLOGIES LLC $2,794,072 0.65% 31,600
Mid BBR PARTNERS, LLC $2,227,741 0.52% 25,195
Mega FRANKLIN RESOURCES INC $1,905,714 0.45% 21,553
Large LAZARD ASSET MANAGEMENT LLC $1,797,401 0.42% 20,328
Large STATE OF WISCONSIN INVESTMENT BOARD $1,680,510 0.39% 19,006
Large Trexquant Investment LP $1,650,005 0.39% 18,661
Mid SEGALL BRYANT & HAMILL, LLC $1,606,945 0.38% 18,174
Large KING LUTHER CAPITAL MANAGEMENT CORP $1,539,480 0.36% 17,411
Mega TWO SIGMA INVESTMENTS, LP $1,446,462 0.34% 16,359
Large Point72 Asset Management, L.P. $1,442,041 0.34% 16,309
Large Creative Planning $1,325,769 0.31% 14,994
Mid RICE HALL JAMES & ASSOCIATES, LLC $1,257,509 0.29% 14,222
Mid CenterBook Partners LP $1,255,033 0.29% 14,194
Mega Invesco Ltd. $1,246,984 0.29% 14,103
Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Pension $1,213,299 0.28% 13,722
Mega AMERICAN CENTURY COMPANIES INC $1,182,440 0.28% 13,373
Mega ROYAL BANK OF CANADA Bank $1,173,774 0.28% 13,275
Mega UBS Group AG $1,065,106 0.25% 12,046
Large STIFEL FINANCIAL CORP $1,004,715 0.24% 11,363
Mega PRINCIPAL FINANCIAL GROUP INC $980,400 0.23% 11,088
Small Numerai GP LLC $968,375 0.23% 10,952
Small GLOBEFLEX CAPITAL L P $958,295 0.22% 10,838
Mega Nuveen, LLC $896,489 0.21% 10,139
Large IEQ CAPITAL, LLC $853,960 0.20% 9,658
Large Connor, Clark & Lunn Investment Management Ltd. $841,493 0.20% 9,517
Large Mariner, LLC $792,773 0.19% 8,966
Mid Quadrature Capital Ltd $768,635 0.18% 8,693
Mega ENVESTNET ASSET MANAGEMENT INC $762,534 0.18% 8,624
Mega CITADEL ADVISORS LLC $744,760 0.17% 8,423
Mid GAMCO INVESTORS, INC. ET AL $692,682 0.16% 7,834
Large Vident Advisory, LLC $672,699 0.16% 7,608
Large SEI INVESTMENTS CO $654,572 0.15% 7,403
Large Cerity Partners LLC $640,601 0.15% 7,245
Large TUDOR INVESTMENT CORP ET AL $607,799 0.14% 6,874
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $601,256 0.14% 6,800
Mega RHUMBLINE ADVISERS $578,885 0.14% 6,547
Mega FMR LLC $572,076 0.13% 6,470
Mid Y-Intercept (Hong Kong) Ltd $558,372 0.13% 6,315
Mid XTX Topco Ltd $548,292 0.13% 6,201
Large CWM, LLC $513,631 0.12% 5,809
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $470,040 0.11% 5,316
Mega ALLIANCEBERNSTEIN L.P. $468,802 0.11% 5,302
Mega DEUTSCHE BANK AG\ Bank $445,901 0.10% 5,043
Mega LPL Financial LLC $402,576 0.09% 4,553
Large Quantinno Capital Management LP $381,797 0.09% 4,318
Small INCEPTIONR LLC $360,576 0.08% 4,078
Large ACADIAN ASSET MANAGEMENT LLC $341,566 0.08% 3,863
Mid Engineers Gate Manager LP $332,989 0.08% 3,766
Mega JPMORGAN CHASE & CO $326,002 0.08% 3,687
Mega PRICE T ROWE ASSOCIATES INC /MD/ $321,583 0.08% 3,637
Small EntryPoint Capital, LLC $306,728 0.07% 3,469
Mid Graham Capital Management, L.P. $294,350 0.07% 3,329
Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $285,066 0.07% 3,224
Large Squarepoint Ops LLC $281,794 0.07% 3,187
Large MERCER GLOBAL ADVISORS INC /ADV $274,102 0.06% 3,100
Mid Brooklyn Investment Group $257,567 0.06% 2,913
Large MetLife Investment Management, LLC $255,356 0.06% 2,888
Large SG Americas Securities, LLC Broker-Dealer $235,816 0.06% 2,667
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $226,708 0.05% 2,564
Large Man Group plc $219,016 0.05% 2,477
Large CAPTRUST FINANCIAL ADVISORS $208,759 0.05% 2,361
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $189,484 0.04% 2,143
Mega Vanguard Global Advisers, LLC $176,132 0.04% 1,992
Mega WELLS FARGO & COMPANY/MN $169,411 0.04% 1,916
Large US BANCORP \DE\ Bank $129,181 0.03% 1,461
Large Police & Firemen's Retirement System of New Jersey Pension $117,687 0.03% 1,331
Large PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO Pension $104,424 0.02% 1,181

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