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.
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
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
ER
EVR Research
Richmond,
Virginia
|
+$9.87M |
| 2 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
+$8.36M |
| 3 |
William Blair & Company
Chicago,
Illinois
|
+$3.37M |
| 4 |
SAM
Silvercrest Asset Management
New York
|
+$2.93M |
| 5 |
Millennium Management
New York
|
+$2.5M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
TAM
Tocqueville Asset Management
New York
|
-$7.34M |
| 2 |
Allspring Global Investments
Charlotte,
North Carolina
|
-$5.85M |
| 3 |
Vanguard Group
Malvern,
Pennsylvania
|
-$3.98M |
| 4 |
Jacobs Levy Equity Management
Florham Park,
New Jersey
|
-$2.26M |
| 5 |
EF
Empowered Funds
Havertown,
Pennsylvania
|
-$1.68M |
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.