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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
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

Allspring Global Investments
Allspring Global Investments Charlotte, North Carolina $59.7B AUM 29.08% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
RA
Royce & Associates New York $10.1B AUM 42.88% 1-Year Est. Return
ER
EVR Research Richmond, Virginia $250M AUM 41.5% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
William Blair & Company
William Blair & Company Chicago, Illinois $34.9B AUM 18.88% 1-Year Est. Return
First Eagle Investment Management
First Eagle Investment Management New York $59B AUM 32.99% 1-Year Est. Return
GIM
Granahan Investment Management Waltham, Massachusetts $2.07B AUM 56.45% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Portolan Capital Management's MEC Position: Q1 2026 in Review

Portolan Capital Management increased its Mayville Engineering Co (MEC) stake by 60% in Q1 2026, buying an estimated $5.94M and bringing the position to 821,136 shares worth $14.7M. The position accounts for 0.78% of the portfolio, ranked #43.

Portolan Capital Management first reported a position in MEC in Q4 2025 and has held it in 2 quarters since. 124 funds tracked by Wall St. Rank hold MEC as of Q1 2026.

  • Portolan Capital Management held 821,136 shares of Mayville Engineering Co worth $14.7M as of Q1 2026.
  • Portolan Capital Management bought 308,374 Mayville Engineering Co shares in Q1 2026, an estimated $5.94M.
  • Mayville Engineering Co made up 0.78% of Portolan Capital Management's portfolio in Q1 2026, its #43 holding.
  • Portolan Capital Management first reported a position in Mayville Engineering Co in Q4 2025 and has held it in 2 quarters since.
  • 124 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q1 2026.

Based on Portolan Capital Management's 13F filing for Q1 2026, filed 15 May 2026.