Mesa Laboratories Inc (MLAB) shareholders
MLABNasdaqIndustrial Instruments For Measurement, Display, and ControlFiscal year ends March 31
Financials through Q2 FY2027, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 9, 2026Score 11/3074% above fair value
$139.01+3.81 (+2.82%)
Close on Nov 13, 2026Market cap $777.88MP/E 120.9Yield 0.46%
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
89.9%
5M of 6M shares
Institutional holders
159
21 new, 18 sold out
Net institutional buying
0M
In Q2 2026
Insider trades, 12 months
5 buys · 7 sales
Net sold $215.72K
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Conestoga Capital Advisors Joint filing with Conestoga Funds (7.62%) | 618,111 | 11.38% | 13G (passive) amendment | Dec 31, 2024 |
| Long Path Partners, LP Joint filing with Long Path Smaller Companies Fund, LP (8.60%), Long Path Fund GP, LLC (8.60%) and 3 more | 477,126 | 8.60% | 13G (passive) amendment | Jun 30, 2026 |
| BlackRock, Inc. | 443,662 | 7.90% | 13G (passive) amendment | Sep 30, 2026 |
| Long Path Holdings LLC Joint filing with Long Path Smaller Companies Fund, LP (7.30%), Long Path Fund GP, LLC (7.30%) and 3 more | 405,583 | 7.30% | 13G (passive) amendment | Mar 31, 2026 |
| Wasatch Advisors LP | 387,129 | 6.90% | 13G (passive) | Sep 30, 2026 |
| Long Path Smaller Companies Fund, LP Joint filing with Long Path Fund GP, LLC (5.60%), Long Path Partners, LP (5.60%) and 3 more | 311,703 | 5.60% | 13G (passive) | Mar 11, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of MLAB | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Long Path Partners LP | 477,126 | 8.53% | $47.50M | +71,543 | 20.24% |
| BlackRock, Inc. | 440,552 | 7.87% | $43.86M | +46,701 | 0.00% |
| Boston Partners | 265,149 | 4.74% | $26.39M | −3,562 | 0.02% |
| Vanguard Capital Management LLC | 237,457 | 4.24% | $23.64M | +4,814 | 0.00% |
| Aqr Capital Management LLC | 203,739 | 3.64% | $20.28M | +33,177 | 0.01% |
| Ranger Investment Management, L.P. | 173,988 | 3.11% | $17.32M | −28,915 | 1.10% |
| Morgan Stanley | 156,979 | 2.81% | $15.63M | −5,137 | 0.00% |
| Diamond Hill Capital Management Inc | 155,771 | 2.78% | $15.51M | +469 | 0.12% |
| Raymond James Financial Inc | 149,937 | 2.68% | $14.93M | +27,026 | 0.00% |
| Dimensional Fund Advisors LP | 148,395 | 2.65% | $14.77M | +23,765 | 0.00% |
| Geode Capital Management, LLC | 139,682 | 2.50% | $13.91M | +11,680 | 0.00% |
| Kennedy Capital Management LLC | 138,301 | 2.47% | $13.77M | −4,042 | 0.24% |
| Jacobs Levy Equity Management, Inc | 130,838 | 2.34% | $13.02M | +86,421 | 0.05% |
| State Street Corp | 124,292 | 2.22% | $12.37M | +2,224 | 0.00% |
| Russell Investments Group, Ltd. | 121,845 | 2.18% | $12.13M | −13,224 | 0.01% |
| Wasatch Advisors LP | 115,668 | 2.07% | $11.51M | +64,435 | 0.08% |
| Royce & Associates LP | 113,395 | 2.03% | $11.29M | −47,834 | 0.09% |
| Crawford Investment Counsel Inc | 98,805 | 1.77% | $9.84M | +3,270 | 0.16% |
| FMR LLC | 88,857 | 1.59% | $8.85M | +82,387 | 0.00% |
| D. E. Shaw & Co., Inc. | 81,755 | 1.46% | $8.14M | +27,197 | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 159 | 5M | 89.9% | 21 / 73 | 38 / 18 | 1M | 1M |
| Q1 2026 | 161 | 5M | 86.3% | 26 / 61 | 42 / 20 | 1M | 1M |
| Q4 2025 | 159 | 5M | 84.8% | 35 / 55 | 44 / 12 | 1M | 1M |
| Q3 2025 | 141 | 5M | 89.2% | 27 / 41 | 53 / 39 | 1M | 2M |
| Q2 2025 | 154 | 5M | 93.4% | 24 / 48 | 54 / 19 | 1M | 0M |
| Q1 2025 | 151 | 5M | 92.4% | 18 / 55 | 52 / 20 | 0M | 0M |
| Q4 2024 | 156 | 5M | 91.5% | 12 / 58 | 52 / 19 | 1M | 0M |
| Q3 2024 | 166 | 5M | 87.6% | 30 / 49 | 50 / 17 | 1M | 0M |
| Q2 2024 | 154 | 5M | 87.5% | 25 / 40 | 63 / 25 | 0M | 1M |
| Q1 2024 | 155 | 5M | 96.2% | 23 / 56 | 48 / 26 | 1M | 0M |
| Q4 2023 | 158 | 5M | 91.8% | 26 / 52 | 56 / 20 | 1M | 1M |
| Q3 2023 | 154 | 5M | 88.0% | 16 / 55 | 56 / 22 | 0M | 0M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
181 funds held MLAB in Q2 2026, 43% of their shares through ETFs. Each fund counts once per quarter, from its quarter-end report.
| Fund | Shares | % of MLAB | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 168,511 | 3.01% | $16.78M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 138,875 | 2.48% | $13.83M | 0.02% | Jun 30, 2026 |
| Diamond Hill Small Cap Fund | 109,454 | 1.96% | $10.90M | 3.54% | Jun 30, 2026 |
| Column Small Cap Select Fund | 87,923 | 1.57% | $8.97M | 0.47% | May 31, 2026 |
| Fidelity Enhanced Small Cap Core ETF | 74,048 | 1.32% | $7.37M | 0.13% | Jun 30, 2026 |
| Crawford Small Cap Dividend Fund | 65,070 | 1.16% | $6.48M | 1.70% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 62,568 | 1.12% | $6.23M | 0.01% | Jun 30, 2026 |
| Wasatch Micro Cap Value Fund | 62,487 | 1.12% | $6.22M | 1.61% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 58,440 | 1.04% | $5.89M | 0.02% | Jul 31, 2026 |
| Keeley Gabelli Small Cap Dividend Fund | 53,974 | 0.96% | $5.37M | 1.89% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF | 50,244 | 0.90% | $5.00M | 0.03% | Jun 30, 2026 |
| Bridge Builder Small/Mid Cap Growth Fund | 42,724 | 0.76% | $4.25M | 0.04% | Jun 30, 2026 |
| WPG Partners Select Small Cap Value Fund | 34,829 | 0.62% | $3.55M | 1.52% | May 31, 2026 |
| U.S. Small Cap Equity Fund | 31,118 | 0.56% | $3.14M | 0.32% | Jul 31, 2026 |
| Janus Henderson Small Cap Growth Alpha ETF | 30,109 | 0.54% | $3.04M | 0.84% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Sanket Shah | General Counsel | – | – | Nov 12, 2026 |
| Siddhartha Kadia | President and CEO | 7,093 | 0.13% | Aug 17, 2026 |
| Lyndsey Elizabeth Crennen | CAO | 2,020 | 0.04% | Jun 23, 2026 |
| Brian David Archbold | SVP Operations | 6,377 | 0.11% | Jun 23, 2026 |
| John Sakys | CFO | 19,835 | 0.35% | Jun 23, 2026 |
| Gary M. Owens | President and CEO | 64,135 | 1.15% | Apr 2, 2026 |
| John James Sullivan | Director | 64,528 | 1.15% | Oct 29, 2026 |
| R. Tony Tripeny | Director | 6,298 | 0.11% | Sep 11, 2026 |
| Shiraz Shabanali Ladiwala | Director | 12,333 | 0.22% | Sep 11, 2026 |
| Jennifer Sadie Alltoft | Director | 7,662 | 0.14% | Sep 11, 2026 |
| Mark Christopher Capone | Director | 6,213 | 0.11% | Sep 11, 2026 |
| Shannon Hall | Director | 6,973 | 0.12% | Sep 11, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| John James Sullivan Director | Oct 13, 2026 | Gift | −1,200 | – | – | 19,418 |
| Shannon Hall Director | Aug 15, 2026 | Option exercise | +2,784 | – | – | 6,973 |
| R. Tony Tripeny Director | Aug 15, 2026 | Option exercise | +2,784 | – | – | 9,082 |
| John James Sullivan Director | Aug 15, 2026 | Option exercise | +2,784 | – | – | 20,618 |
| Jennifer Sadie Alltoft Director | Aug 15, 2026 | Option exercise | +2,784 | – | – | 7,662 |
| Shiraz Shabanali Ladiwala Director | Aug 15, 2026 | Option exercise | +3,810 | – | – | 12,333 |
| Mark Christopher Capone Director | Aug 15, 2026 | Option exercise | +2,784 | – | – | 6,213 |
| John James Sullivan Director | Aug 13, 2026 | Sale | −7,093 | $112.80 | $800.09K | 17,834 |
| R. Tony Tripeny Director | Aug 13, 2026 | Buy | +900 | $113.69 | $102.32K | 6,298 |
| Siddhartha Kadia President and CEO | Aug 13, 2026 | Buy | +7,093 | $112.80 | $800.09K | 7,093 |
| Brian David Archbold SVP Operations | Jun 22, 2026 | Sale | −2,516 | $89.50 | $225.18K | 6,377 |
| Lyndsey Elizabeth Crennen CAO | Jun 22, 2026 | Sale | −442 | $89.50 | $39.56K | 2,020 |
| John Sakys CFO | Jun 22, 2026 | Sale(10b5-1 plan) | −2,827 | $89.50 | $253.02K | 19,785 |
| Brian David Archbold SVP Operations | Jun 18, 2026 | Option exercise | +844 | $95.10 | $80.26K | 4,554 |
| Brian David Archbold SVP Operations | Jun 18, 2026 | Option exercise | +2,480 | $95.10 | $235.85K | 7,034 |
| Brian David Archbold SVP Operations | Jun 18, 2026 | Award | +1,859 | $95.10 | $176.79K | 8,893 |
| Lyndsey Elizabeth Crennen CAO | Jun 18, 2026 | Option exercise | +368 | $95.10 | $35.00K | 2,199 |
| Lyndsey Elizabeth Crennen CAO | Jun 18, 2026 | Award | +263 | $95.10 | $25.01K | 2,462 |
| Lyndsey Elizabeth Crennen CAO | Jun 18, 2026 | Option exercise | +125 | $95.10 | $11.89K | 1,598 |
| Lyndsey Elizabeth Crennen CAO | Jun 18, 2026 | Option exercise | +233 | $95.10 | $22.16K | 1,831 |
| John Sakys CFO | Jun 18, 2026 | Award | +2,282 | $95.10 | $217.02K | 22,612 |
| John Sakys CFO | Jun 18, 2026 | Option exercise | +1,036 | $95.10 | $98.52K | 17,574 |
| John Sakys CFO | Jun 18, 2026 | Option exercise | +2,756 | $95.10 | $262.10K | 20,330 |
| Brian David Archbold SVP Operations | Jun 16, 2026 | Sale(10b5-1 plan) | −1,151 | $101.27 | $116.56K | 3,710 |
| Lyndsey Elizabeth Crennen CAO | Jun 16, 2026 | Sale(10b5-1 plan) | −118 | $101.27 | $11.95K | 1,473 |
| John Sakys CFO | Jun 16, 2026 | Sale(10b5-1 plan) | −1,223 | $101.27 | $123.85K | 16,538 |
| Brian David Archbold SVP Operations | Jun 15, 2026 | Option exercise | +2,454 | $104.08 | $255.41K | 4,861 |
| John Sakys CFO | Jun 15, 2026 | Option exercise | +2,717 | $104.08 | $282.79K | 17,761 |
| Shiraz Shabanali Ladiwala Director | Mar 10, 2026 | Buy | +3,500 | $72.23 | $252.81K | 8,523 |
| R. Tony Tripeny Director | Mar 10, 2026 | Buy | +1,315 | $76.00 | $99.94K | 5,398 |
| Mark Christopher Capone Director | Mar 10, 2026 | Buy | +1,301 | $76.35 | $99.33K | 3,429 |
| John James Sullivan Director | Dec 2, 2025 | Gift | −2,000 | – | – | 25,282 |
| Gary M. Owens President and CEO | Oct 27, 2025 | Option exercise | +11,558 | – | – | 64,135 |
| R. Tony Tripeny Director | Aug 15, 2025 | Option exercise | +1,404 | – | – | 4,083 |
| John James Sullivan Director | Aug 15, 2025 | Option exercise | +1,404 | – | – | 27,282 |
| Shiraz Shabanali Ladiwala Director | Aug 15, 2025 | Option exercise | +1,949 | – | – | 5,023 |
| Jennifer Sadie Alltoft Director | Aug 15, 2025 | Option exercise | +1,404 | – | – | 4,878 |
| Mark Christopher Capone Director | Aug 15, 2025 | Option exercise | +1,404 | – | – | 2,128 |
| Shannon Hall Director | Aug 15, 2025 | Option exercise | +1,404 | – | – | 4,189 |
| Brian David Archbold SVP Operations | Jun 21, 2025 | Option exercise | +844 | $95.82 | $80.87K | 2,792 |
| Brian David Archbold SVP Operations | Jun 21, 2025 | Tax withholding | −385 | $95.82 | $36.89K | 2,407 |
| John Sakys CFO | Jun 21, 2025 | Option exercise | +1,036 | $95.82 | $99.27K | 15,498 |
| John Sakys CFO | Jun 21, 2025 | Tax withholding | −454 | $95.82 | $43.50K | 15,044 |
| Gary M. Owens President and CEO | Jun 21, 2025 | Option exercise | +3,301 | $95.82 | $316.30K | 54,022 |
| Gary M. Owens President and CEO | Jun 21, 2025 | Tax withholding | −1,445 | $95.82 | $138.46K | 52,577 |
| Gary M. Owens President and CEO | Jun 18, 2025 | Tax withholding | −3,810 | $92.99 | $354.29K | 50,721 |
| Gary M. Owens President and CEO | Jun 18, 2025 | Option exercise | +8,707 | $92.99 | $809.66K | 54,531 |
| John Sakys CFO | Jun 18, 2025 | Option exercise | +2,840 | $92.99 | $264.09K | 15,705 |
| John Sakys CFO | Jun 18, 2025 | Tax withholding | −1,243 | $92.99 | $115.59K | 14,462 |
| Brian David Archbold SVP Operations | Jun 18, 2025 | Tax withholding | −1,166 | $92.99 | $108.43K | 1,948 |
| Brian David Archbold SVP Operations | Jun 18, 2025 | Option exercise | +2,556 | $92.99 | $237.68K | 3,114 |
| Gary M. Owens President and CEO | Jun 16, 2025 | Sale | −1,939 | $97.12 | $188.32K | 45,824 |
| John Sakys CFO | Jun 16, 2025 | Sale | −642 | $97.12 | $62.35K | 12,865 |
| Brian David Archbold SVP Operations | Jun 16, 2025 | Sale | −472 | $97.12 | $45.84K | 558 |
| Gary M. Owens President and CEO | Jun 15, 2025 | Option exercise | +2,102 | – | – | 47,763 |
| Gary M. Owens President and CEO | Jun 15, 2025 | Option exercise | +2,324 | – | – | 43,337 |
| John Sakys CFO | Jun 15, 2025 | Option exercise | +793 | – | – | 12,839 |
| Brian David Archbold SVP Operations | Jun 15, 2025 | Option exercise | +495 | – | – | 1,030 |
| Brian David Archbold SVP Operations | Jun 15, 2025 | Option exercise | +535 | – | – | 535 |
| Gary M. Owens President and CEO | Mar 19, 2025 | Sale(10b5-1 plan) | −21,000 | $123.91 | $2.60M | 43,337 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Short interest
Shares sold short and not yet bought back, as of Oct 30, 2026 (FINRA, reported twice a month)
Short % of float
6.99%
0M shares short
Days to cover
4.7
At 0M shares a day
Change since last report
-3.4%
From 0M shares
Short volume, 20 days
60.6%
Of volume reported to FINRA
Shares sold short, last 12 months
Short sale volume counts trades marked short on any given day, including market-maker hedging, so it runs far higher than the share of Mesa Laboratories's stock actually held short. Settlement fails (shares not delivered on time) peaked at 5,200 shares on Sep 3, 2026 over the last 90 days.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Gary M. Owens Former Officer | Aug 27, 2026 | 20,358 | $2.60M | Aug 27, 2026 | Restricted Stock Vesting |
| Gary M. Owens Former Officer | Aug 21, 2026 | 20,000 | $2.45M | Aug 21, 2026 | Restricted Stock Vesting |
| Brian David Archbold Officer | Jun 22, 2026 | 2,516 | $225.19K | Jun 22, 2026 | Restricted Stock Vesting |
| John Sakys Officer | Jun 22, 2026 | 2,827 | $253.02K | Jun 22, 2026 | Restricted Stock Vesting |
| Brian David Archbold Officer | Jun 16, 2026 | 1,151 | $116.56K | Jun 16, 2026 | Restricted Stock Vesting |
| John Sakys Officer | Jun 16, 2026 | 1,223 | $123.85K | Jun 16, 2026 | Restricted Stock Vesting |
| Gary M. Owens Former Officer | Jun 16, 2026 | 3,706 | $375.30K | Jun 16, 2026 | Restricted Stock Vesting |
| Brian David Archbold Officer | Jun 16, 2025 | 472 | $45.84K | Jun 16, 2025 | Restricted Stock Vesting |
| John Sakys Officer | Jun 16, 2025 | 642 | $62.35K | Jun 16, 2025 | Restricted Stock Vesting |
| Gary M. Owens Officer, Director | Jun 16, 2025 | 1,939 | $188.31K | Jun 16, 2025 | Restricted Stock Vesting |
| Gary M. Owens Officer, Director | Mar 19, 2025 | 21,000 | $2.60M | Mar 19, 2025 | Option Granted 03/20/2017 |
| Gary M. Owens Officer, Director | Oct 29, 2024 | 2,551 | $285.65K | Oct 29, 2024 | Restricted Stock Vesting |
| Gary M. Owens Officer, Director | Oct 28, 2024 | 2,518 | $286.09K | Oct 28, 2024 | Restricted Stock Vesting |
| Brian David Archbold Officer | Sep 13, 2024 | 1,499 | $187.38K | Sep 13, 2024 | Restricted Stock Vesting |
| Brian David Archbold Officer | Dec 15, 2023 | 1,500 | $174.00K | Dec 15, 2023 | Restricted Stock Vesting |
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