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Mayville Engineering Co
MEC

123 hedge funds and large institutions have $258M invested in Mayville Engineering Co in 2026 Q1 according to their latest regulatory filings, with 24 funds opening new positions, 37 increasing their positions, 39 reducing their positions, and 20 closing their positions.

New
Increased
Maintained
Reduced
Closed

20% more first-time investments, than exits

New positions opened: 24 | Existing positions closed: 20

2.52% more ownership

Funds ownership: 68.16% → 70.68% (+2.5%)

1% more funds holding

Funds holding: 122 → 123 (+1)

1% less capital invested

Capital invested by funds: $260M → $258M (-$1.98M)

5% less repeat investments, than reductions

Existing positions increased: 37 | Existing positions reduced: 39

50% less funds holding in top 10

Funds holding in top 10: 2 → 1 (-1)

Holders
123
Holders Change
+1
Holders Change %
+0.82%
% of All Funds
1.52%
Holding in Top 10
1
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-50%
% of All Funds
0.01%
New
24
Increased
37
Reduced
39
Closed
20
Calls
$23K
Puts
–
Net Calls
+$23K
Net Calls Change
-$4K

Top Buyers

1
PCM
Portolan Capital Management
Massachusetts
+$5.94M
2
Millennium Management
Millennium Management
New York
+$4.39M
3
PC
Panoramic Capital
California
+$2.7M
4
RA
Royce & Associates
New York
+$2.44M
5
EF
Empowered Funds
Pennsylvania
+$2.37M

Top Sellers

1
2L
22NW LP
Washington
-$7.76M
2
CP
CenterBook Partners
Connecticut
-$2.61M
3
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
-$1.99M
4
AA
Ancora Advisors
Ohio
-$1.81M
5
American Century Companies
American Century Companies
Missouri
-$1.14M
Name Holding Trade Value Shares
Change 		Change in
Stake
Allspring Global Investments
1
Allspring Global Investments
North Carolina
$35.8M -$1.01M -52,263 -3%
Dimensional Fund Advisors
2
Dimensional Fund Advisors
Texas
$16.6M +$944K +49,041 +6%
BlackRock
3
BlackRock
New York
$15.8M +$313K +16,235 +2%
PCM
4
Portolan Capital Management
Massachusetts
$14.7M +$5.94M +308,374 +60%
RA
5
Royce & Associates
New York
$13.5M +$2.44M +126,694 +20%
ER
6
EVR Research
Virginia
$11.1M +$289K +15,000 +2%
VCM
7
Vanguard Capital Management
Pennsylvania
$10.7M +$11.5M +594,938 New
William Blair & Company
8
William Blair & Company
Illinois
$10.1M -$355K -18,459 -3%
First Eagle Investment Management
9
First Eagle Investment Management
New York
$7.25M +$886K +46,000 +13%
GIM
10
Granahan Investment Management
Massachusetts
$6.96M +$2.3M +119,708 +45%
Millennium Management
11
Millennium Management
New York
$6.84M +$4.39M +227,772 +149%
Ameriprise
12
Ameriprise
Minnesota
$6.31M +$18.2K +946 +0.3%
Geode Capital Management
13
Geode Capital Management
Massachusetts
$6.03M +$133K +6,914 +2%
State Street
14
State Street
Massachusetts
$5.13M +$16.4K +850 +0.3%
SAM
15
Silvercrest Asset Management
New York
$4.84M +$1.73M +89,740 +50%
JCP
16
JB Capital Partners
New York
$4.5M – – –
CC
17
Congruence Capital
California
$4.21M +$508K +26,373 +13%
Boston Partners
18
Boston Partners
Massachusetts
$4.18M +$191K +9,907 +4%
BCM
19
Bridgeway Capital Management
Texas
$4M -$81.3K -4,223 -2%
American Century Companies
20
American Century Companies
Missouri
$3.98M -$1.14M -59,167 -21%
RC
21
Roubaix Capital
Colorado
$3.78M +$1.24M +64,360 +44%
Arrowstreet Capital
22
Arrowstreet Capital
Massachusetts
$3.33M -$1.99M -103,189 -36%
Bank of America
23
Bank of America
North Carolina
$3.3M -$679K -35,289 -16%
WANY
24
Wealthspire Advisors (New York)
New York
$2.54M +$889K +46,192 +48%
PC
25
Panoramic Capital
California
$2.51M +$2.7M +140,000 New
1
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