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MLAB · Mesa Laboratories Inc /Co/ · Holdings

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$120.87 -0.04 (-0.03%) At close · Sep 11
Market Cap
$676.37M
Shares
5.60M

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: 158
Total Value: $498,368,483
Total Shares: 5,006,214
Showing 1–100 of 158 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 158 13F filers · Δ vs Mar 31, 2026
Top Holder
9.5%
Sep 2023 → Jun 2026 · range 8.4% – 17.5%
+1.1 pts
Top 5
32.4%
Sep 2023 → Jun 2026 · range 28.8% – 48.6%
+0.6 pts
Top 10
48.1%
Sep 2023 → Jun 2026 · range 46.9% – 66.9%
−1.4 pts
HHI
361
Sep 2023 → Jun 2026 · range 324 – 667
Broadly held+6

Quarterly Activity

vs Mar 31, 2026
New
20
Increased
73
Decreased
38
Sold Out
23
Unchanged
27
Holder count: -3
Institutional value: +16.7%
Shares held: +3.7%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 158
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 724004 CUSIP 59064R109 13F (30d) 54 filings 54 filers Visit website