PCM
MEC icon

Portolan Capital Management’s Mayville Engineering Co MEC Stock Holding History

Portolan Capital Management’s Portfolio MEC Stock Details MEC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$48.7M Buy
1,299,256
+478,120
+58% +$12.8M 1.82% 7
2026
Q1 		$14.7M Buy
821,136
+308,374
+60% +$5.94M 0.78% 43
2025
Q4 		$9.6M Buy
+512,762
New +$8.36M 0.51% 72

Other funds holding MEC

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Allspring Global Investments
Allspring Global Investments Charlotte, North Carolina $65.2B AUM 39.42% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
SPPAM
Summit Partners Public Asset Management Boston, Massachusetts $5.69B AUM 259.25% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
RA
Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
JT
Jupiter Topco New York $245B AUM

Portolan Capital Management's MEC Position: Q2 2026 in Review

Portolan Capital Management increased its Mayville Engineering Co (MEC) stake by 58% in Q2 2026, buying an estimated $12.8M and bringing the position to 1,299,256 shares worth $48.7M. The position accounts for 1.82% of the portfolio, ranked #7.

Portolan Capital Management first reported a position in MEC in Q4 2025 and has held it in 3 quarters since. 155 funds tracked by Wall St. Rank hold MEC as of Q2 2026.

  • Portolan Capital Management held 1,299,256 shares of Mayville Engineering Co worth $48.7M as of Q2 2026.
  • Portolan Capital Management bought 478,120 Mayville Engineering Co shares in Q2 2026, an estimated $12.8M.
  • Mayville Engineering Co made up 1.82% of Portolan Capital Management's portfolio in Q2 2026, its #7 holding.
  • Portolan Capital Management first reported a position in Mayville Engineering Co in Q4 2025 and has held it in 3 quarters since.
  • 155 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q2 2026.

Based on Portolan Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.