MESA LABS INC

Ticker: MLAB CUSIP: 59064R109 Class: Common Stock

Note: Option positions (PUT/CALL) are excluded.

InstitutionSharesValue ($000)
BlackRock, Inc.398,666$31,295
VANGUARD GROUP INC321,899$25,269
Long Path Partners LP227,223$17,837
Boston Partners213,376$16,752
Select Equity Group, L.P.206,435$16,205
Ranger Investment Management, L.P.205,263$16,113
GENEVA CAPITAL MANAGEMENT LLC178,713$14,029
MORGAN STANLEY175,589$13,784
ROYCE & ASSOCIATES LP153,352$12,038
KENNEDY CAPITAL MANAGEMENT LLC144,606$11,352
DIAMOND HILL CAPITAL MANAGEMENT INC141,973$11,145
GEODE CAPITAL MANAGEMENT, LLC127,950$10,046
STATE STREET CORP120,641$9,470
JANUS HENDERSON GROUP PLC116,642$9,156
DIMENSIONAL FUND ADVISORS LP116,363$9,135
Russell Investments Group, Ltd.116,337$9,133
RAYMOND JAMES FINANCIAL INC100,397$7,887
Meros Investment Management, LP85,017$6,674
CRAWFORD INVESTMENT COUNSEL INC81,220$6,376
D. E. Shaw & Co., Inc.76,565$6,010
MASON CAPITAL MANAGEMENT LLC70,300$5,519
AQR CAPITAL MANAGEMENT LLC70,138$5,506
NORTHERN TRUST CORP65,651$5,154
CHARLES SCHWAB INVESTMENT MANAGEMENT INC61,913$4,860
GABELLI FUNDS LLC60,724$4,767
CITADEL ADVISORS LLC58,521$4,594
JANE STREET GROUP, LLC56,371$4,425
GOLDMAN SACHS GROUP INC55,268$4,339
Roubaix Capital, LLC55,189$4,332
BANK OF AMERICA CORP /DE/54,664$4,291
Herald Investment Management Ltd50,000$3,916
Trexquant Investment LP46,121$3,620
Bank of New York Mellon Corp44,774$3,515
MONIMUS CAPITAL MANAGEMENT, LP40,842$3,206
JACOBS LEVY EQUITY MANAGEMENT, INC38,842$3,049
Qube Research & Technologies Ltd28,130$2,208
TUDOR INVESTMENT CORP ET AL27,426$2,153
Irenic Capital Management LP25,000$1,963
STATE OF WISCONSIN INVESTMENT BOARD22,606$1,775
FRANKLIN RESOURCES INC22,074$1,733
SEGALL BRYANT & HAMILL, LLC18,203$1,429
KING LUTHER CAPITAL MANAGEMENT CORP17,411$1,367
Numerai GP LLC14,909$1,170
PRINCIPAL FINANCIAL GROUP INC14,892$1,169
Connor, Clark & Lunn Investment Management Ltd.14,369$1,128
RICE HALL JAMES & ASSOCIATES, LLC14,217$1,116
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO13,722$1,077
Quadrature Capital Ltd13,528$1,062
AMERICAN CENTURY COMPANIES INC13,470$1,057
Point72 Asset Management, L.P.13,458$1,056
Man Group plc13,387$1,051
Invesco Ltd.12,845$1,008
XTX Topco Ltd12,601$989
Creative Planning12,437$976
TWO SIGMA INVESTMENTS, LP12,235$960
GSA CAPITAL PARTNERS LLP11,614$1
STIFEL FINANCIAL CORP11,275$885
Nuveen, LLC10,078$791
ACADIAN ASSET MANAGEMENT LLC9,665$1
BNP PARIBAS ARBITRAGE, SA9,406$738
UBS Group AG8,825$693
SEI INVESTMENTS CO8,371$657
BARCLAYS PLC8,186$643
GAMCO INVESTORS, INC. ET AL7,754$609
MARSHALL WACE, LLP7,137$560
ExodusPoint Capital Management, LP6,937$545
ENVESTNET ASSET MANAGEMENT INC6,932$544
RHUMBLINE ADVISERS6,617$519
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP6,228$489
Dynamic Technology Lab Private Ltd6,190$486
WELLS FARGO & COMPANY/MN5,752$452
ROYAL BANK OF CANADA5,457$429
ALLIANCEBERNSTEIN L.P.5,424$426
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.5,055$397
LPL Financial LLC4,984$391
MILLENNIUM MANAGEMENT LLC4,465$351
Aquatic Capital Management LLC4,446$349
DEUTSCHE BANK AG\4,440$349
JPMORGAN CHASE & CO4,100$322
BALYASNY ASSET MANAGEMENT L.P.3,792$298
Graham Capital Management, L.P.3,723$292
CANADA PENSION PLAN INVESTMENT BOARD3,700$290
Quantinno Capital Management LP3,661$287
SG Americas Securities, LLC3,609$0
Brooklyn Investment Group3,576$286
RENAISSANCE TECHNOLOGIES LLC3,500$275
EntryPoint Capital, LLC3,469$272
Cerity Partners LLC3,361$264
Mariner, LLC3,313$260
PRICE T ROWE ASSOCIATES INC /MD/3,141$0
Engineers Gate Manager LP3,031$238
MetLife Investment Management, LLC2,888$227
Squarepoint Ops LLC2,747$216
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM2,564$201
NEW YORK STATE COMMON RETIREMENT FUND2,143$168
AlphaQuest LLC2,116$166
Quantbot Technologies LP2,095$164
CWM, LLC1,485$0
US BANCORP \DE\1,337$105
Police & Firemen's Retirement System of New Jersey1,331$104
56 other institutions11,880$790
Total (156 institutions)4,716,265$367,776