Mayville Engineering Co
MEC
154 hedge funds and large institutions have $791M invested in Mayville Engineering Co in 2026 Q2 according to their latest regulatory filings, with 53 funds opening new positions, 44 increasing their positions, 39 reducing their positions, and 20 closing their positions.
206% more capital invested
Capital invested by funds: $258M → $791M (+$532M)
165% more first-time investments, than exits
New positions opened: 53 | Existing positions closed: 20
141% more call options, than puts
Call options by funds: $18.9M | Put options by funds: $7.82M
100% more funds holding in top 10
Funds holding in top 10: 1 → 2 (+1)
32.45% more ownership
Funds ownership: 70.88% → 103.33% (+32%)
24% more funds holding
Funds holding: 124 → 154 (+30)
13% more repeat investments, than reductions
Existing positions increased: 44 | Existing positions reduced: 39
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$34.1M |
| 2 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
+$22.6M |
| 3 |
SPPAM
Summit Partners Public Asset Management
Boston,
Massachusetts
|
+$21.4M |
| 4 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
+$12.8M |
| 5 |
Wellington Management Group
Boston,
Massachusetts
|
+$12.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Allspring Global Investments
Charlotte,
North Carolina
|
-$24.8M |
| 2 |
Ameriprise
Minneapolis,
Minnesota
|
-$6.31M |
| 3 |
ER
EVR Research
Richmond,
Virginia
|
-$4.76M |
| 4 |
American Century Companies
Kansas City,
Missouri
|
-$4.64M |
| 5 |
Dimensional Fund Advisors
Austin,
Texas
|
-$3.85M |
MEC Hedge Fund Activity: Q2 2026 in Review
154 of the 8,305 institutional investors tracked by Wall St. Rank reported a position in Mayville Engineering Co (MEC) for Q2 2026, worth a combined $791M — up 206% from $258M a quarter earlier.
Buyers outnumbered sellers: 53 funds opened new MEC positions and 20 closed out — a net gain of 33 holders — while 44 added to existing stakes and 39 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $34.1M. The largest seller was Allspring Global Investments, cutting an estimated $24.8M.
- 154 institutional investors held Mayville Engineering Co (MEC) as of Q2 2026, up from 124 in Q1 2026.
- Funds reported $791M of Mayville Engineering Co stock for Q2 2026, up 206% quarter-over-quarter.
- 53 funds opened new Mayville Engineering Co positions in Q2 2026 and 20 closed out, a net change of +33 holders.
- The largest Mayville Engineering Co buyer in Q2 2026 was Fidelity Investments, an estimated $34.1M added.
- The largest Mayville Engineering Co seller in Q2 2026 was Allspring Global Investments, an estimated $24.8M sold.
Based on aggregated 13F filings for Q2 2026.