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Mayville Engineering Co
MEC

112 hedge funds and large institutions have $203M invested in Mayville Engineering Co in 2025 Q2 according to their latest regulatory filings, with 14 funds opening new positions, 47 increasing their positions, 31 reducing their positions, and 18 closing their positions.

New
Increased
Maintained
Reduced
Closed

250% more call options, than puts

Call options by funds: $7K | Put options by funds: $2K

52% more repeat investments, than reductions

Existing positions increased: 47 | Existing positions reduced: 31

21% more capital invested

Capital invested by funds: $168M → $203M (+$34.7M)

0.88% more ownership

Funds ownership: 60.91% → 61.79% (+0.88%)

3% less funds holding

Funds holding: 116 → 112 (-4)

22% less first-time investments, than exits

New positions opened: 14 | Existing positions closed: 18

Holders
112
Holders Change
-4
Holders Change %
-3.45%
% of All Funds
1.47%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
14
Increased
47
Reduced
31
Closed
18
Calls
$7K
Puts
$2K
Net Calls
+$5K
Net Calls Change
+$44K

Top Buyers

Rank Fund Capital Flow
1
William Blair & Company
William Blair & Company
Illinois
+$4.02M
2
Vanguard Group
Vanguard Group
Pennsylvania
+$3.8M
3
2L
22NW LP
Washington
+$2.22M
4
RC
Roubaix Capital
Colorado
+$1.44M
5
BlackRock
BlackRock
New York
+$909K

Top Sellers

Rank Fund Capital Flow
1
NC
Nokomis Capital
Texas
-$4.66M
2
Citadel Advisors
Citadel Advisors
Florida
-$1.83M
3
PAMP
Polar Asset Management Partners
Ontario, Canada
-$1.76M
4
Millennium Management
Millennium Management
New York
-$1.51M
5
Squarepoint
Squarepoint
New York
-$932K
Name Holding Trade Value Shares
Change 		Change in
Stake
Susquehanna International Group
51
Susquehanna International Group
Pennsylvania
$450K +$63.6K +4,449 +19%
Lazard Asset Management
52
Lazard Asset Management
New York
$431K -$21.6K -1,509 -5%
AQR Capital Management
53
AQR Capital Management
Connecticut
$405K -$635K -44,435 -64%
Envestnet Asset Management
54
Envestnet Asset Management
Illinois
$403K -$43.8K -3,068 -11%
Raymond James Financial
55
Raymond James Financial
Florida
$390K +$129K +9,026 +59%
State of Wisconsin Investment Board
56
State of Wisconsin Investment Board
Wisconsin
$388K +$136K +9,500 +64%
AWM
57
Avior Wealth Management
Nebraska
$366K – – –
GI
58
Gradient Investments
Minnesota
$344K -$12.5K -875 -4%
LPL Financial
59
LPL Financial
California
$333K -$57.1K -4,000 -16%
RhumbLine Advisers
60
RhumbLine Advisers
Massachusetts
$319K +$21.8K +1,526 +8%
Squarepoint
61
Squarepoint
New York
$307K -$932K -65,250 -77%
B
62
Bailard
California
$284K +$254K +17,800 New
SIA
63
SeaBridge Investment Advisors
New Jersey
$261K +$157 +11 +0.1%
Citadel Advisors
64
Citadel Advisors
Florida
$255K -$1.83M -127,758 -89%
EC
65
EntryPoint Capital
New York
$254K -$8.24K -577 -3%
Franklin Resources
66
Franklin Resources
California
$253K – – –
SCM
67
Sterling Capital Management
North Carolina
$252K +$1.86K +130 +0.8%
Victory Capital Management
68
Victory Capital Management
Texas
$242K +$25.7K +1,796 +13%
Wells Fargo
69
Wells Fargo
California
$227K +$4.76K +333 +2%
Wealth Enhancement Advisory Services
70
Wealth Enhancement Advisory Services
Minnesota
$213K -$44.8K -3,139 -20%
AllianceBernstein
71
AllianceBernstein
Tennessee
$211K +$188K +13,190 New
TPW
72
Transatlantique Private Wealth
New York
$205K – – –
SOW
73
State of Wyoming
Wyoming
$203K -$76.2K -5,335 -30%
OAM
74
Oppenheimer Asset Management
New York
$178K -$3.09K -216 -2%
Ohio Public Employees Retirement System (OPERS)
75
Ohio Public Employees Retirement System (OPERS)
Ohio
$173K – – –
1 2
3
4 5

MEC Hedge Fund Activity: Q2 2025 in Review

112 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in Mayville Engineering Co (MEC) for Q2 2025, worth a combined $203M — up 21% from $168M a quarter earlier.

Sellers outnumbered buyers: 18 funds closed out of MEC and 14 opened new positions — a net loss of 4 holders — while 31 trimmed existing stakes and 47 added.

The largest buyer was William Blair & Company, adding an estimated $4.02M. The largest seller was Nokomis Capital, exiting entirely with an estimated $4.66M sold.

  • 112 institutional investors held Mayville Engineering Co (MEC) as of Q2 2025, down from 116 in Q1 2025.
  • Funds reported $203M of Mayville Engineering Co stock for Q2 2025, up 21% quarter-over-quarter.
  • 14 funds opened new Mayville Engineering Co positions in Q2 2025 and 18 closed out, a net change of -4 holders.
  • The largest Mayville Engineering Co buyer in Q2 2025 was William Blair & Company, an estimated $4.02M added.
  • The largest Mayville Engineering Co seller in Q2 2025 was Nokomis Capital, an estimated $4.66M sold.

Based on aggregated 13F filings for Q2 2025.