Mesa Laboratories Inc /Co/ (MLAB) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

5,584,615Shares Outstanding

146,557Shares held by institutions

$12,989,347Value of institutional holdings

82.13%Institutional ownership %

13.94%Shares Changed QoQ

152No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

According to SEC filings for the period ending December 2025, Mesa Laboratories Inc /Co/ (NASDAQ:MLAB) is held by 152 institutional firms.

Institutional ownership in Mesa Laboratories edged down to 82.1% in December 2025, compared to 90.2% in September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by 13.94%, with a year-over-year a decrease of 5.00% in the count of filers.
Among the 152 institutional holders of Mesa Laboratories, 86 added to their stakes while 44 trimmed their positions and 22 held steady.
Collectively, institutional investors increased their stake in Mesa Laboratories to 4.59Mn shares as of December 2025, a change that is up by 561.17K shares quarter on quarter and down 559.34K shares year over year.
As of December 31, 2025, BlackRock, Inc. held Mesa Laboratories's largest shareholding position with over 398.67K shares, representing 7.14% of total outstanding shares.
Among the most significant buyers of Mesa Laboratories during December 2025 were Long Path Partners LP (227.22K), Boston Partners (99.02K), Select Equity Group, L.P. (79.72K), D. E. Shaw & Co., Inc. (43.75K), AQR CAPITAL MANAGEMENT LLC (37.50K).
Leading sellers of Mesa Laboratories stock in December 2025 included MILLENNIUM MANAGEMENT LLC (129.35K), MORGAN STANLEY (79.39K), COMERICA BANK (42.31K), JANUS HENDERSON GROUP PLC (29.01K), Roubaix Capital, LLC (21.47K).
The top 10 institutional holders of Mesa Laboratories for the quarter ending December 2025 included BlackRock, Inc. (398.67K), VANGUARD GROUP INC (321.90K), Long Path Partners LP (227.22K), Boston Partners (213.38K), Select Equity Group, L.P. (206.44K), Ranger Investment Management, L.P. (205.26K), GENEVA CAPITAL MANAGEMENT LLC (178.71K), MORGAN STANLEY (175.59K), ROYCE & ASSOCIATES LP (153.35K), KENNEDY CAPITAL MANAGEMENT LLC (144.61K).

152 Institutional Holders

146,557 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	398,666	9,871	2.54%	$31,295,283.00
VANGUARD GROUP INC	31 Dec, 2025	321,899	182	0.06%	$25,269,072.00
Long Path Partners LP	31 Dec, 2025	227,223	227,223	0.00%	$17,837,006.00
Boston Partners	31 Dec, 2025	213,376	99,019	86.59%	$16,751,917.00
Select Equity Group, L.P.	31 Dec, 2025	206,435	79,720	62.91%	$16,205,148.00
Ranger Investment Management, L.P.	31 Dec, 2025	205,263	-4,437	-2.12%	$16,113,146.00
GENEVA CAPITAL MANAGEMENT LLC	31 Dec, 2025	178,713	-12,673	-6.62%	$14,028,948.00
MORGAN STANLEY	31 Dec, 2025	175,589	-79,385	-31.13%	$13,783,817.00
ROYCE & ASSOCIATES LP	31 Dec, 2025	153,352	4,794	3.23%	$12,038,132.00
KENNEDY CAPITAL MANAGEMENT LLC	31 Dec, 2025	144,606	23,060	18.97%	$11,351,571.00
DIAMOND HILL CAPITAL MANAGEMENT INC	31 Dec, 2025	141,973	18,592	15.07%	$11,144,881.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	127,950	90	0.07%	$10,046,267.00
STATE STREET CORP	31 Dec, 2025	120,641	1,693	1.42%	$9,470,319.00
JANUS HENDERSON GROUP PLC	31 Dec, 2025	116,642	-29,012	-19.92%	$9,156,397.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	116,363	-409	-0.35%	$9,134,552.00
Russell Investments Group, Ltd.	31 Dec, 2025	116,337	17,150	17.29%	$9,132,508.00
Meros Investment Management, LP	31 Dec, 2025	85,017	8,540	11.17%	$6,673,835.00
CRAWFORD INVESTMENT COUNSEL INC	31 Dec, 2025	81,220	-1,247	-1.51%	$6,375,770.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	76,565	43,754	133.35%	$6,010,353.00
MASON CAPITAL MANAGEMENT LLC	31 Dec, 2025	70,300	0	0.00%	$5,518,550.00

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