We are live on ! Find out more
MEC icon

Mayville Engineering Co
MEC

123 hedge funds and large institutions have $260M invested in Mayville Engineering Co in 2025 Q4 according to their latest regulatory filings, with 30 funds opening new positions, 34 increasing their positions, 42 reducing their positions, and 11 closing their positions.

New
Increased
Maintained
Reduced
Closed

173% more first-time investments, than exits

New positions opened: 30 | Existing positions closed: 11

42% more capital invested

Capital invested by funds: $184M → $260M (+$76.8M)

18% more funds holding

Funds holding: 104 → 123 (+19)

2.97% more ownership

Funds ownership: 65.36% → 68.33% (+3%)

6% more call options, than puts

Call options by funds: $446K | Put options by funds: $419K

19% less repeat investments, than reductions

Existing positions increased: 34 | Existing positions reduced: 42

Holders
123
Holders Change
+19
Holders Change %
+18.27%
% of All Funds
1.5%
Holding in Top 10
2
Holding in Top 10 Change
+2
Holding in Top 10 Change %
% of All Funds
0.02%
New
30
Increased
34
Reduced
42
Closed
11
Calls
$446K
Puts
$419K
Net Calls
+$27K
Net Calls Change
+$21K

Top Buyers

1
ER
EVR Research
Virginia
+$9.87M
2
PCM
Portolan Capital Management
Massachusetts
+$8.36M
3
William Blair & Company
William Blair & Company
Illinois
+$3.37M
4
SAM
Silvercrest Asset Management
New York
+$2.93M
5
Millennium Management
Millennium Management
New York
+$2.5M

Top Sellers

1
TAM
Tocqueville Asset Management
New York
-$7.34M
2
Allspring Global Investments
Allspring Global Investments
North Carolina
-$5.85M
3
Vanguard Group
Vanguard Group
Pennsylvania
-$3.98M
4
Jacobs Levy Equity Management
Jacobs Levy Equity Management
New Jersey
-$2.26M
5
EF
Empowered Funds
Pennsylvania
-$1.68M
Name Holding Trade Value Shares
Change 		Change in
Stake
Allspring Global Investments
1
Allspring Global Investments
North Carolina
$38.9M -$5.85M -358,490 -15%
Dimensional Fund Advisors
2
Dimensional Fund Advisors
Texas
$16.4M +$490K +30,052 +4%
BlackRock
3
BlackRock
New York
$16.2M -$803K -49,220 -5%
Vanguard Group
4
Vanguard Group
Pennsylvania
$11.7M -$3.98M -244,004 -28%
RA
5
Royce & Associates
New York
$11.7M +$939K +57,590 +10%
ER
6
EVR Research
Virginia
$11.3M +$9.87M +605,000 New
William Blair & Company
7
William Blair & Company
Illinois
$10.9M +$3.37M +206,549 +55%
PCM
8
Portolan Capital Management
Massachusetts
$9.6M +$8.36M +512,762 New
2L
9
22NW LP
Washington
$7.76M +$235K +14,390 +4%
First Eagle Investment Management
10
First Eagle Investment Management
New York
$6.7M +$57.1K +3,500 +1%
Ameriprise
11
Ameriprise
Minnesota
$6.57M -$706K -43,317 -11%
Geode Capital Management
12
Geode Capital Management
Massachusetts
$6.16M -$97.1K -5,952 -2%
Arrowstreet Capital
13
Arrowstreet Capital
Massachusetts
$5.4M +$323K +19,815 +7%
State Street
14
State Street
Massachusetts
$5.34M +$164K +10,064 +4%
American Century Companies
15
American Century Companies
Missouri
$5.26M -$1.37M -83,954 -23%
GIM
16
Granahan Investment Management
Massachusetts
$5.01M -$1.33M -81,505 -23%
CP
17
CenterBook Partners
Connecticut
$4.79M +$1.27M +78,132 +44%
JCP
18
JB Capital Partners
New York
$4.69M – – –
BCM
19
Bridgeway Capital Management
Texas
$4.25M -$157K -9,622 -4%
Boston Partners
20
Boston Partners
Massachusetts
$4.17M +$401K +24,570 +12%
Bank of America
21
Bank of America
North Carolina
$4.1M +$162K +9,913 +5%
CC
22
Congruence Capital
California
$3.9M +$3.39M +208,102 New
Russell Investments Group
23
Russell Investments Group
United Kingdom
$3.56M -$39.3K -2,413 -1%
SAM
24
Silvercrest Asset Management
New York
$3.37M +$2.93M +179,941 New
Millennium Management
25
Millennium Management
New York
$2.87M +$2.5M +153,200 New
1
2 3 4 5

MEC Hedge Fund Activity: Q4 2025 in Review

123 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Mayville Engineering Co (MEC) for Q4 2025, worth a combined $260M — up 42% from $184M a quarter earlier.

Buyers outnumbered sellers: 30 funds opened new MEC positions and 11 closed out — a net gain of 19 holders — while 34 added to existing stakes and 42 trimmed.

The largest buyer was EVR Research, opening a new position worth an estimated $9.87M. The largest seller was Tocqueville Asset Management, cutting an estimated $7.34M.

  • 123 institutional investors held Mayville Engineering Co (MEC) as of Q4 2025, up from 104 in Q3 2025.
  • Funds reported $260M of Mayville Engineering Co stock for Q4 2025, up 42% quarter-over-quarter.
  • 30 funds opened new Mayville Engineering Co positions in Q4 2025 and 11 closed out, a net change of +19 holders.
  • The largest Mayville Engineering Co buyer in Q4 2025 was EVR Research, an estimated $9.87M added.
  • The largest Mayville Engineering Co seller in Q4 2025 was Tocqueville Asset Management, an estimated $7.34M sold.

Based on aggregated 13F filings for Q4 2025.