Mayville Engineering Co
MEC
116 hedge funds and large institutions have $168M invested in Mayville Engineering Co in 2025 Q1 according to their latest regulatory filings, with 14 funds opening new positions, 39 increasing their positions, 38 reducing their positions, and 12 closing their positions.
17% more first-time investments, than exits
New positions opened: 14 | Existing positions closed: 12
2% more funds holding
Funds holding: 114 → 116 (+2)
3% more repeat investments, than reductions
Existing positions increased: 39 | Existing positions reduced: 38
0.52% more ownership
Funds ownership: 60.39% → 60.91% (+0.52%)
14% less capital invested
Capital invested by funds: $195M → $168M (-$27.6M)
28% less call options, than puts
Call options by funds: $99K | Put options by funds: $138K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$1.98M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$1.52M |
| 3 |
CP
CenterBook Partners
Greenwich,
Connecticut
|
+$1.48M |
| 4 |
Millennium Management
New York
|
+$1.23M |
| 5 |
Dimensional Fund Advisors
Austin,
Texas
|
+$1.02M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
William Blair & Company
Chicago,
Illinois
|
-$1.59M |
| 2 |
NC
Nokomis Capital
Dallas,
Texas
|
-$1.55M |
| 3 |
GIM
Granahan Investment Management
Waltham,
Massachusetts
|
-$1.52M |
| 4 |
Goldman Sachs
New York
|
-$1.51M |
| 5 |
HCA
Harbor Capital Advisors
Chicago,
Illinois
|
-$1.3M |
MEC Hedge Fund Activity: Q1 2025 in Review
116 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in Mayville Engineering Co (MEC) for Q1 2025, worth a combined $168M — down 14% from $195M a quarter earlier.
Buyers outnumbered sellers: 14 funds opened new MEC positions and 12 closed out — a net gain of 2 holders — while 39 added to existing stakes and 38 trimmed.
The largest buyer was Citadel Advisors, adding an estimated $1.98M. The largest seller was William Blair & Company, cutting an estimated $1.59M.
- 116 institutional investors held Mayville Engineering Co (MEC) as of Q1 2025, up from 114 in Q4 2024.
- Funds reported $168M of Mayville Engineering Co stock for Q1 2025, down 14% quarter-over-quarter.
- 14 funds opened new Mayville Engineering Co positions in Q1 2025 and 12 closed out, a net change of +2 holders.
- The largest Mayville Engineering Co buyer in Q1 2025 was Citadel Advisors, an estimated $1.98M added.
- The largest Mayville Engineering Co seller in Q1 2025 was William Blair & Company, an estimated $1.59M sold.
Based on aggregated 13F filings for Q1 2025.