MLAB · Mesa Laboratories Inc · Shareholders & Ownership
$129.15
-0.05 (-0.04%)
At close · Oct 22
View the 10-K filed Jun 3, 2026
Return incl. dividend (before tax)
Customer concentration
— top customer 20% of revenue
One customer — 20% of revenue (fiscal 2026)
“In our Clinical Genomics division, a significant portion of revenues is generated from ongoing purchases by a relatively small number of established customers, with a single customer accounting for approximately 20% of the division's revenues in fiscal 2026.”
Market Cap
$722.99M
Shares
5.60M
Volume · Oct 21
84.2K
Avg daily vol (3M)
132.61K
Every disclosed holder of MLAB in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns MLAB
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 5,294,965 | 94.62% |
| Insiders (Forms 3, 4, 5) | 207,451 | 3.71% |
| 13D/G-only blocks | 1,095,237 | 19.57% |
| Remaining | 1,001,784 | -17.90% |
| Registered funds (N-PORT, not summed) | 1,722,657 | 30.78% |
Shares outstanding: 5,595,869, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of MLAB
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
Conestoga Capital Advisors, LLC
13G
CIK 1163744 · Investment adviser · Dec 31, 2024
Rule 13d-1(b), qualified institution
|
618,111 | ||
| 2 |
Long Path Partners LP
13F
CIK 1905112 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
477,126 | ||
| 3 |
Long Path Smaller Companies Fund, LP
13G
CIK 1748049 · Unknown · Jun 30, 2026
Rule 13d-1(c), passive investor
|
477,126 | ||
| 4 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
440,552 | ||
| 4.1 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
138,875 | ||
| 4.2 |
iShares Russell 2000 Growth ETF
Fund
S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
50,244 | ||
| 4.3 |
Master Small Cap Index Series
Fund
S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
|
10,139 | ||
| 4.4 |
iShares U.S. Small-Cap Equity Factor ETF
Fund
S000048624 · Registered fund · Jul 31, 2026
iShares Trust, not summed
|
9,814 | ||
| 4.5 |
iShares Core S&P Total U.S. Stock Market ETF
Fund
S000004317 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
7,364 | ||
| 5 |
WASATCH ADVISORS LP
13F
CIK 814133 · Registered investment adviser · Sep 30, 2026
|
387,129 | ||
| 5.1 |
WASATCH ADVISORS LP
13G
CIK 814133 · Registered investment adviser · Sep 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
387,129 | ||
| 5.2 |
Wasatch Micro Cap Value Fund
Fund
S000000886 · Registered fund · Jun 30, 2026
WASATCH FUNDS TRUST, not summed
|
62,487 | ||
| 6 |
Boston Partners
13F
CIK 1386060 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
265,149 | ||
| 7 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
237,457 | ||
| 8 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
203,739 | ||
| 9 |
Ranger Investment Management, L.P.
13F
CIK 1319691 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
173,988 | ||
| 9.1 |
Ranger Small Cap Fund
Fund
S000033849 · Registered fund · Jul 31, 2026
SPEND LIFE WISELY FUNDS INVESTMENT TRUST, not summed
|
1,484 | ||
| 9.2 |
Ranger Micro Cap Fund
Fund
S000033850 · Registered fund · Jul 31, 2026
SPEND LIFE WISELY FUNDS INVESTMENT TRUST, not summed
|
1,399 | ||
| 10 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
168,511 | ||
| 11 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
156,979 | ||
| 11.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
3 | ||
| 12 |
DIAMOND HILL CAPITAL MANAGEMENT INC
13F
CIK 1217541 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
155,771 | ||
| 12.1 |
DIAMOND HILL SMALL CAP FUND
Fund
S000003154 · Registered fund · Jun 30, 2026
Diamond Hill Funds, not summed
|
109,454 | ||
| 13 |
RAYMOND JAMES FINANCIAL INC
13F
CIK 720005 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
149,937 | ||
| 14 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
148,395 | ||
| 14.1 |
Dimensional U.S. Targeted Value ETF
Fund
S000070901 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
22,290 | ||
| 14.2 |
U.S. Targeted Value Portfolio
Fund
S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
21,544 | ||
| 14.3 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
18,722 | ||
| 14.4 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
18,417 | ||
| 14.5 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
15,672 | ||
| 15 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
139,682 | ||
| 16 |
KENNEDY CAPITAL MANAGEMENT LLC
13F
CIK 884589 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
138,301 | ||
| 16.1 |
Kennedy Capital Small Cap Value Fund
Fund
S000076118 · Registered fund · Jun 30, 2026
INVESTMENT MANAGERS SERIES TRUST II, not summed
|
7,146 | ||
| 17 |
JACOBS LEVY EQUITY MANAGEMENT, INC
13F
CIK 884414 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
130,838 | ||
| 18 |
|
124,292 | ||
| 18.1 |
State Street Institutional Small-Cap Equity Fund
Fund
S000001631 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL FUNDS, not summed
|
5,756 | ||
| 18.2 |
State Street(R) SPDR(R) US Small Cap Low Volatility Index ETF
Fund
S000039795 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
3,161 | ||
| 18.3 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
1,798 | ||
| 18.4 |
State Street Small-Cap Equity V.I.S. Fund
Fund
S000001636 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
258 | ||
| 18.5 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
118 | ||
| 19 |
Russell Investments Group, Ltd.
13F
CIK 1692234 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
121,845 | ||
| 19.1 |
U.S. Small Cap Equity Fund
Fund
S000001586 · Registered fund · Jul 31, 2026
RUSSELL INVESTMENT CO, not summed
|
31,118 | ||
| 19.2 |
U.S. Small Cap Equity Fund
Fund
S000006864 · Registered fund · Jun 30, 2026
RUSSELL INVESTMENT FUNDS, not summed
|
8,137 | ||
| 19.3 |
Russell Investments U.S. Small Cap Equity ETF
Fund
S000089990 · Registered fund · Jun 30, 2026
Russell Investments Exchange Traded Funds, not summed
|
2,160 | ||
| 20 |
ROYCE & ASSOCIATES LP
13F
CIK 906304 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
113,395 | ||
| 20.1 |
Royce Micro-Cap Fund
Fund
S000009506 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
17,948 | ||
| 20.2 |
Royce Capital Fund - Micro-Cap Portfolio
Fund
S000009496 · Registered fund · Jun 30, 2026
ROYCE CAPITAL FUND, not summed
|
5,915 | ||
| 21 |
CRAWFORD INVESTMENT COUNSEL INC
13F
CIK 837592 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
98,805 | ||
| 21.1 |
CRAWFORD SMALL CAP DIVIDEND FUND
Fund
S000038330 · Registered fund · Jun 30, 2026
Unified Series Trust, not summed
|
65,070 | ||
| 22 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
88,857 | ||
| 22.1 |
Fidelity Enhanced Small Cap Core ETF
Fund
S000081807 · Registered fund · Jun 30, 2026
Fidelity Covington Trust, not summed
|
74,048 | ||
| 22.2 |
Fidelity Small Cap Index Fund
Fund
S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
58,440 | ||
| 22.3 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
28,769 | ||
| 22.4 |
VIP Disciplined Small Cap Portfolio
Fund
S000007725 · Registered fund · Jun 30, 2026
Variable Insurance Products Fund II, not summed
|
13,092 | ||
| 22.5 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
10,085 | ||
| 23 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
81,755 | ||
| 24 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
71,580 | ||
| 25 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
69,350 | ||
| 26 |
Meros Investment Management, LP
13F
CIK 1911372 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
67,962 | ||
| 27 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
65,745 | ||
| 27.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
2,698 | ||
| 27.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
1,269 | ||
| 28 |
|
65,728 | ||
| 29 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
64,322 | ||
| 29.1 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
6,958 | ||
| 29.2 |
Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund
Fund
S000009355 · Registered fund · Jun 30, 2026
Goldman Sachs Variable Insurance Trust, not summed
|
1,481 | ||
| 29.3 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
320 | ||
| 30 |
|
64,135 | ||
| 31 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
62,568 | ||
| 32 |
GABELLI FUNDS LLC
13F
CIK 1081407 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
62,499 | ||
| 32.1 |
Keeley Gabelli Small Cap Dividend Fund
Fund
S000026907 · Registered fund · Jun 30, 2026
Keeley Funds, Inc., not summed
|
53,974 | ||
| 32.2 |
Keeley Dividend ETF
Fund
S000096300 · Registered fund · Jun 30, 2026
Gabelli ETFs Trust, not summed
|
1,425 | ||
| 33 |
MONIMUS CAPITAL MANAGEMENT, LP
13F
CIK 1848831 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
55,344 | ||
| 34 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
54,463 | ||
| 34.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
26,518 | ||
| 34.2 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
12,958 | ||
| 34.3 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
4,652 | ||
| 34.4 |
Schwab Small-Cap Equity Fund
Fund
S000005516 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
4,588 | ||
| 34.5 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
4,444 | ||
| 35 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
49,952 | ||
| 36 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
45,602 | ||
| 37 |
Bridge Builder Small/Mid Cap Growth Fund
Fund
S000048336 · Registered fund · Jun 30, 2026
Bridge Builder Trust, not summed
|
42,724 | ||
| 38 |
HERALD INVESTMENT MANAGEMENT Ltd
13F
CIK 1512022 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
42,500 | ||
| 39 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
39,536 | ||
| 40 |
Qube Research & Technologies Ltd
13F
CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
37,402 | ||
| 41 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
35,890 | ||
| 42 |
WPG Partners Select Small Cap Value Fund
Fund
S000074886 · Registered fund · May 31, 2026
RBB Fund, Inc., not summed
|
34,829 | ||
| 43 |
Jupiter Topco LLC
13F
CIK 2146052 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
30,996 | ||
| 43.1 |
Janus Henderson Small Cap Growth Alpha ETF
Fund
S000052563 · Registered fund · Jul 31, 2026
Janus Detroit Street Trust, not summed
|
30,109 | ||
| 44 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
29,239 | ||
| 45 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
28,900 | ||
| 46 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
27,018 | ||
| 47 |
BBR PARTNERS, LLC
13F
CIK 1352467 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
25,195 | ||
| 48 |
WisdomTree U.S. SmallCap Dividend Fund
Fund
S000012394 · Registered fund · Jun 30, 2026
WisdomTree Trust, not summed
|
24,683 | ||
| 49 |
Man Group plc
13F
CIK 1637460 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
24,070 | ||
| 50 |
Point72 Asset Management, L.P.
13F
CIK 1603466 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
22,514 |
31 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
Showing 1–50 of 265 holders
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Key facts
CIK
724004
CUSIP
59064R109
13F (30d)
19 filings
19 filers
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