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.
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
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
William Blair & Company
Chicago,
Illinois
|
+$4.02M |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$3.8M |
| 3 |
2L
22NW LP
Seattle,
Washington
|
+$2.22M |
| 4 |
RC
Roubaix Capital
Denver,
Colorado
|
+$1.44M |
| 5 |
BlackRock
New York
|
+$909K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
NC
Nokomis Capital
Dallas,
Texas
|
-$4.66M |
| 2 |
Citadel Advisors
Miami,
Florida
|
-$1.83M |
| 3 |
PAMP
Polar Asset Management Partners
Toronto,
Ontario, Canada
|
-$1.76M |
| 4 |
Millennium Management
New York
|
-$1.51M |
| 5 |
Squarepoint
New York
|
-$932K |
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.