Mayville Engineering Co
MEC
124 hedge funds and large institutions have $258M invested in Mayville Engineering Co in 2026 Q1 according to their latest regulatory filings, with 24 funds opening new positions, 38 increasing their positions, 39 reducing their positions, and 20 closing their positions.
20% more first-time investments, than exits
New positions opened: 24 | Existing positions closed: 20
2.55% more ownership
Funds ownership: 68.33% → 70.88% (+2.5%)
1% more funds holding
Funds holding: 123 → 124 (+1)
1% less capital invested
Capital invested by funds: $260M → $258M (-$1.91M)
3% less repeat investments, than reductions
Existing positions increased: 38 | Existing positions reduced: 39
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
+$5.94M |
| 2 |
Millennium Management
New York
|
+$4.39M |
| 3 |
PC
Panoramic Capital
Larkspur,
California
|
+$2.7M |
| 4 |
RA
Royce & Associates
New York
|
+$2.44M |
| 5 |
EF
Empowered Funds
Havertown,
Pennsylvania
|
+$2.37M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
2L
22NW LP
Seattle,
Washington
|
-$7.76M |
| 2 |
CP
CenterBook Partners
Greenwich,
Connecticut
|
-$2.61M |
| 3 |
Arrowstreet Capital
Boston,
Massachusetts
|
-$1.99M |
| 4 |
AA
Ancora Advisors
Cleveland,
Ohio
|
-$1.81M |
| 5 |
American Century Companies
Kansas City,
Missouri
|
-$1.14M |
MEC Hedge Fund Activity: Q1 2026 in Review
124 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Mayville Engineering Co (MEC) for Q1 2026, worth a combined $258M — down 0.74% from $260M a quarter earlier.
Buyers outnumbered sellers: 24 funds opened new MEC positions and 20 closed out — a net gain of 4 holders — while 38 added to existing stakes and 39 trimmed.
The largest buyer was Portolan Capital Management, adding an estimated $5.94M. The largest seller was 22NW LP, exiting entirely with an estimated $7.76M sold.
- 124 institutional investors held Mayville Engineering Co (MEC) as of Q1 2026, up from 123 in Q4 2025.
- Funds reported $258M of Mayville Engineering Co stock for Q1 2026, down 0.74% quarter-over-quarter.
- 24 funds opened new Mayville Engineering Co positions in Q1 2026 and 20 closed out, a net change of +4 holders.
- The largest Mayville Engineering Co buyer in Q1 2026 was Portolan Capital Management, an estimated $5.94M added.
- The largest Mayville Engineering Co seller in Q1 2026 was 22NW LP, an estimated $7.76M sold.
Based on aggregated 13F filings for Q1 2026.