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Mayville Engineering Co
MEC

Overview Fund Activity

116 hedge funds and large institutions have $168M invested in Mayville Engineering Co in 2025 Q1 according to their latest regulatory filings, with 15 funds opening new positions, 38 increasing their positions, 38 reducing their positions, and 12 closing their positions.

Holders
116
Holders Change
+2
Holders Change %
+1.75%
% of All Funds
1.58%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
15
Increased
38
Reduced
38
Closed
12
Calls
$99K
Puts
$138K
Net Calls
-$39K
Net Calls Change
-$198K

Top Buyers

1
Citadel Advisors
1
Citadel Advisors
Florida
$1.93M
2
Marshall Wace
2
Marshall Wace
United Kingdom
$1.36M
3
CP
3
CenterBook Partners
Connecticut
$1.32M
4
Millennium Management
4
Millennium Management
New York
$1.51M
5
Dimensional Fund Advisors
5
Dimensional Fund Advisors
Texas
$10.4M

Top Sellers

1
William Blair & Company
1
William Blair & Company
Illinois
$1.24M
2
NC
2
Nokomis Capital
Texas
$4.66M
3
GIM
3
Granahan Investment Management
Massachusetts
$6.42M
4
Goldman Sachs
4
Goldman Sachs
New York
$1.52M
5
HCA
5
Harbor Capital Advisors
Illinois
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Marshall Wace
26
Marshall Wace
United Kingdom
$1.36M 101,372 +101,372 New
ACA
27
Anchor Capital Advisors
Massachusetts
$1.35M 100,849 +44 +0%
Northern Trust
28
Northern Trust
Illinois
$1.34M 99,909 -1,425 -1%
CP
29
CenterBook Partners
Connecticut
$1.32M 98,553 +98,553 New
EF
30
Empowered Funds
Pennsylvania
$1.32M 98,207 +6,694 +7%
WANY
31
Wealthspire Advisors (New York)
New York
$1.28M 95,415 – –
William Blair & Company
32
William Blair & Company
Illinois
$1.24M 92,250 -105,490 -53%
Renaissance Technologies
33
Renaissance Technologies
New York
$1.15M 85,900 -26,800 -24%
Squarepoint
34
Squarepoint
New York
$1.13M 84,475 +57,329 +211%
AQR Capital Management
35
AQR Capital Management
Connecticut
$938K 69,809 -1,834 -3%
EEL
36
Expect Equity LLC
Maryland
$733K 54,574 -20,170 -27%
NL
37
Nuveen LLC
North Carolina
$644K 47,917 +47,917 New
Jane Street
38
Jane Street
New York
$634K 47,194 +28,946 +159%
SEI Investments
39
SEI Investments
Pennsylvania
$610K 45,387 -3,183 -7%
MAM
40
Martingale Asset Management
Massachusetts
$602K 44,815 +2,604 +6%
SSWM
41
Sheets Smith Wealth Management
North Carolina
$509K 37,905 +1,380 +4%
Bank of New York Mellon
42
Bank of New York Mellon
New York
$498K 37,102 -1,155 -3%
Ameriprise
43
Ameriprise
Minnesota
$493K 36,689 -75,424 -67%
Janney Montgomery Scott
44
Janney Montgomery Scott
Pennsylvania
$488K 36,309 +1,646 +5%
Charles Schwab
45
Charles Schwab
California
$460K 34,252 – –
SO
46
STRS Ohio
Ohio
$450K 33,500 – –
Invesco
47
Invesco
Georgia
$440K 32,768 -3,232 -9%
OSAM
48
O'Shaughnessy Asset Management
Connecticut
$411K 30,577 -10,786 -26%
PCM
49
Perritt Capital Management
Illinois
$403K 30,000 – –
Barclays
50
Barclays
United Kingdom
$397K 29,637 -8,506 -22%
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