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MLAB · Mesa Laboratories Inc /Co/ · Held by Funds

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$125.16 +1.86 (+1.50%) At close · Oct 20
Russell 2000 member Rebalance outlook locked
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.”
View the 10-K filed Jun 3, 2026
Market Cap
$690.00M
Shares
5.60M
Volume · Oct 20 77.23K Avg daily vol (3M) 133.1K

Registered funds — mutual funds, ETFs and closed-end funds — whose latest Form N-PORT portfolio report holds this exact listed security, matched by CUSIP. Each row is one fund position with its size, value and weight in that fund.

Fund Ownership of MLAB by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 13.49% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 3.26% 182,338
Index ETFs 10.23% 572,402
Active ETFs 2.86% 159,833
Active funds 13.14% 735,356
Unclassified 2.57% 143,734
All registered funds 32.05% 1,793,663
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Funds holding MLAB

199 fund positions
Fund Balance Value % of Fund Open
VANGUARD TOTAL STOCK MARKET INDEX FUND 168,511 $16,775,270 0.00%
iShares Russell 2000 ETF 138,875 $13,825,006 0.02%
DIAMOND HILL SMALL CAP FUND 109,454 $10,896,146 3.54%
Fidelity Enhanced Small Cap Core ETF 74,048 $7,371,478 0.13%
CRAWFORD SMALL CAP DIVIDEND FUND 65,070 $6,477,719 1.70%
VANGUARD EXTENDED MARKET INDEX FUND 62,568 $6,228,644 0.01%
Wasatch Micro Cap Value Fund 62,487 $6,220,581 1.61%
Fidelity Small Cap Index Fund 58,440 $5,891,336 0.02%
Keeley Gabelli Small Cap Dividend Fund 53,974 $5,373,112 1.89%
ROYCE SMALL-CAP TRUST, INC. 53,188 $5,294,865 0.20%
iShares Russell 2000 Growth ETF 50,244 $5,001,790 0.03%
Bridge Builder Small/Mid Cap Growth Fund 42,724 $4,253,174 0.04%
ROYCE MICRO-CAP TRUST, INC. 42,575 $4,238,341 0.47%
WPG Partners Select Small Cap Value Fund 34,829 $3,553,255 1.52%
U.S. Small Cap Equity Fund 31,118 $3,137,006 0.32%
Janus Henderson Small Cap Growth Alpha ETF 30,109 $3,035,288 0.84%
Fidelity Extended Market Index Fund 28,769 $2,935,013 0.01%
VANGUARD RUSSELL 2000 INDEX FUND 27,018 $2,756,376 0.02%
Schwab U.S. Small-Cap ETF 26,518 $2,705,366 0.01%
WisdomTree U.S. SmallCap Dividend Fund 24,683 $2,457,193 0.11%
Dimensional U.S. Targeted Value ETF 22,290 $2,247,055 0.02%
U.S. Targeted Value Portfolio 21,544 $2,171,851 0.01%
U.S. SMALL CAP PORTFOLIO 18,722 $1,887,365 0.01%
U.S. MICRO CAP PORTFOLIO 18,417 $1,856,618 0.02%
Royce Micro-Cap Fund 17,948 $1,786,723 0.42%
VANGUARD HEALTH CARE INDEX FUND 16,440 $1,677,209 0.01%
SPDR(R) S & P 600 Small Cap ETF 9,478 $1,656,091 0.10%
Dimensional U.S. Small Cap ETF 15,672 $1,579,894 0.01%
Virtus NFJ Small-Cap Value Fund 13,169 $1,310,974 0.51%
Schwab Small-Cap Index Fund 12,958 $1,306,296 0.02%
VIP Disciplined Small Cap Portfolio 13,092 $1,303,309 0.19%
Avantis U.S. Small Cap Equity ETF 12,718 $1,297,490 0.05%
ACUITAS US MICROCAP FUND 12,920 $1,286,186 1.09%
Dimensional U.S. Core Equity 2 ETF 11,543 $1,163,650 0.00%
Principal U.S. Small-Cap ETF 11,527 $1,147,513 0.05%
Fidelity Total Market Index Fund 10,085 $1,028,872 0.00%
Master Small Cap Index Series 10,139 $1,009,337 0.02%
iShares U.S. Small-Cap Equity Factor ETF 9,814 $989,349 0.02%
Transamerica Small Cap Growth 9,614 $969,187 1.20%
Invesco RAFI US 1500 Small-Mid ETF 8,763 $883,398 0.03%
PACE Small/Medium Co Growth Equity Investments 8,657 $872,712 0.34%
Fidelity Series Total Market Index Fund 8,428 $859,825 0.00%
U.S. Small Cap Equity Fund 8,137 $810,038 0.33%
Acuitas Small Cap Active ETF 7,608 $757,376 0.83%
VANGUARD EXPLORER FUND 7,490 $755,067 0.00%
iShares Core S&P Total U.S. Stock Market ETF 7,364 $733,086 0.00%
Nuveen Small Cap Blend Index Fund 7,149 $720,691 0.02%
Kennedy Capital Small Cap Value Fund 7,146 $711,384 0.81%
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF 6,958 $709,855 0.07%
Gabelli Dividend & Income Trust 7,100 $706,805 0.02%
Showing 1–50 of 199 positions
Key facts CIK 724004 CUSIP 59064R109 13F (30d) 17 filings 17 filers Visit website Investor relations