Mesa Laboratories Inc /Co/ (MLAB) Institutional Ownership

Ownership Summary

The institutional landscape for Mesa Laboratories Inc /Co/ (NASDAQ:MLAB) includes 28 filers as of the latest reporting cycle ending December 2025.

• Institutional ownership in Mesa Laboratories edged down to 7.4% in December 2025, compared to 90.2% in September 2025.
• Institutional share ownership changed by -7.83% QoQ, while the number of institutional owners saw a decrease of 82.50% YoY.
• A review of institutional activity for Mesa Laboratories shows 13 of 28 filers increasing their positions, while 7 reduced their stake, and 8 remained unchanged.
• The total number of shares held by institutions in Mesa Laboratories decreased to 424.43K as of December 2025, a net change of down by 36.03K shares quarter on quarter, and down 4.72Mn shares year over year.
• VANGUARD GROUP INC's holding of 321.90K shares as of December 31, 2025 makes it the primary institutional investor in Mesa Laboratories, owning 5.60% of the stock.
• Among the most significant buyers of Mesa Laboratories during December 2025 were GABELLI FUNDS LLC (6.75K), PRINCIPAL FINANCIAL GROUP INC (4.83K), SG Americas Securities, LLC (3.61K), CWM, LLC (888), US BANCORP \DE\ (635).
• Leading sellers of Mesa Laboratories stock in December 2025 included COMERICA BANK (42.31K), UBS Group AG (10.34K), GAMCO INVESTORS, INC. ET AL (458), BESSEMER GROUP INC (163), Farther Finance Advisors, LLC (111).
• The top 10 institutional holders of Mesa Laboratories for the quarter ending December 2025 included VANGUARD GROUP INC (321.90K), GABELLI FUNDS LLC (60.72K), PRINCIPAL FINANCIAL GROUP INC (14.89K), UBS Group AG (8.82K), GAMCO INVESTORS, INC. ET AL (7.75K), SG Americas Securities, LLC (3.61K), CWM, LLC (1.49K), US BANCORP \DE\ (1.34K), Asset Dedication, LLC (830), Geneos Wealth Management Inc. (728).