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Mayville Engineering Co
MEC

Overview Fund Activity

111 hedge funds and large institutions have $202M invested in Mayville Engineering Co in 2025 Q2 according to their latest regulatory filings, with 13 funds opening new positions, 47 increasing their positions, 31 reducing their positions, and 18 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
111
Holders Change
-5
Holders Change %
-4.31%
% of All Funds
1.49%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
13
Increased
47
Reduced
31
Closed
18
Calls
$7K
Puts
$2K
Net Calls
+$5K
Net Calls Change
+$44K

Top Buyers

1
William Blair & Company
1
William Blair & Company
Illinois
$5.96M
2
Vanguard Group
2
Vanguard Group
Pennsylvania
$14.1M
3
2L
3
22NW LP
Washington
$2.48M
4
RC
4
Roubaix Capital
Colorado
$1.61M
5
BlackRock
5
BlackRock
New York
$14.6M

Top Sellers

1
NC
1
Nokomis Capital
Texas
$0
2
Citadel Advisors
2
Citadel Advisors
Florida
$255K
3
PAMP
3
Polar Asset Management Partners
Ontario, Canada
$0
4
Millennium Management
4
Millennium Management
New York
$0
5
Squarepoint
5
Squarepoint
New York
$307K
Name Holding Trade Value Shares
Change 		Shares
Change %
Allspring Global Investments
1
Allspring Global Investments
North Carolina
$39.8M +$81.5K +5,013 +0.2%
BlackRock
2
BlackRock
New York
$14.6M +$1.02M +63,598 +7%
Vanguard Group
3
Vanguard Group
Pennsylvania
$14.1M +$4.25M +266,049 +43%
Dimensional Fund Advisors
4
Dimensional Fund Advisors
Texas
$13M +$662K +41,466 +5%
TAM
5
Tocqueville Asset Management
New York
$9.12M -$798K -50,017 -8%
RA
6
Royce & Associates
New York
$8.92M -$518K -32,470 -5%
GIM
7
Granahan Investment Management
Massachusetts
$7.95M +$323K +20,267 +4%
William Blair & Company
8
William Blair & Company
Illinois
$5.96M +$4.49M +281,198 +305%
AA
9
Ancora Advisors
Ohio
$5.74M +$801K +50,200 +16%
First Eagle Investment Management
10
First Eagle Investment Management
New York
$5.65M +$35.1K +2,200 +0.6%
Geode Capital Management
11
Geode Capital Management
Massachusetts
$5.08M +$440K +27,552 +9%
American Century Companies
12
American Century Companies
Missouri
$4.9M +$875K +54,843 +22%
Arrowstreet Capital
13
Arrowstreet Capital
Massachusetts
$4.29M +$35.7K +2,235 +0.8%
State Street
14
State Street
Massachusetts
$4.23M +$202K +12,681 +5%
JCP
15
JB Capital Partners
New York
$4M – – –
Bank of America
16
Bank of America
North Carolina
$3.63M -$200K -12,527 -5%
BCM
17
Bridgeway Capital Management
Texas
$3.55M +$156K +9,779 +5%
Russell Investments Group
18
Russell Investments Group
United Kingdom
$3.45M +$253K +15,867 +8%
2L
19
22NW LP
Washington
$2.48M +$2.48M +155,450 New
Renaissance Technologies
20
Renaissance Technologies
New York
$2.3M +$927K +58,100 +68%
Jacobs Levy Equity Management
21
Jacobs Levy Equity Management
New Jersey
$2.18M +$62K +3,885 +3%
Osaic Holdings
22
Osaic Holdings
Arizona
$2.05M -$230K -14,613 -10%
GC
23
Globeflex Capital
California
$1.86M – – –
EF
24
Empowered Funds
Pennsylvania
$1.72M +$156K +9,779 +10%
Northern Trust
25
Northern Trust
Illinois
$1.62M +$29.2K +1,829 +2%
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