Marshall Wace
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Marshall Wace’s Mayville Engineering Co MEC Stock Holding History

Marshall Wace’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
2025
Q3 		– Sell
-64,566
Closed -$1.03M – 3196
2025
Q2 		$1.03M Sell
64,566
-36,806
-36% -$526K ﹤0.01% 1831
2025
Q1 		$1.36M Buy
+101,372
New +$1.52M ﹤0.01% 1643
2024
Q4 		– Sell
-18,174
Closed -$383K – 2840
2024
Q3 		$383K Sell
18,174
-40,512
-69% -$758K ﹤0.01% 2025
2024
Q2 		$978K Buy
+58,686
New +$887K ﹤0.01% 1701
2023
Q2 		– Sell
-14,649
Closed -$219K – 2771
2023
Q1 		$219K Sell
14,649
-47,516
-76% -$692K ﹤0.01% 2392
2022
Q4 		$787K Buy
+62,165
New +$620K ﹤0.01% 2188
2020
Q1 		– Sell
-22,707
Closed -$213K – 1889
2019
Q4 		$213K Buy
+22,707
New +$236K ﹤0.01% 1332

Other funds holding MEC

Allspring Global Investments
Allspring Global Investments Charlotte, North Carolina $59.7B AUM 29.08% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
RA
Royce & Associates New York $10.1B AUM 42.88% 1-Year Est. Return
TAM
Tocqueville Asset Management New York $6.74B AUM 32.29% 1-Year Est. Return
2L
22NW LP Seattle, Washington $146M AUM 29.83% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return
William Blair & Company
William Blair & Company Chicago, Illinois $34.9B AUM 18.88% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Marshall Wace's MEC Position: Q3 2025 in Review

Marshall Wace sold out of Mayville Engineering Co (MEC) in Q3 2025, closing a stake of 64,566 shares — an estimated $1.03M sold.

Marshall Wace first reported a position in MEC in Q4 2019 and held it in 7 quarters. The position peaked at $1.36M in Q1 2025. 104 funds tracked by Wall St. Rank hold MEC as of Q3 2025.

  • Marshall Wace reported no remaining Mayville Engineering Co position as of Q3 2025 after selling out during the quarter.
  • Marshall Wace sold 64,566 Mayville Engineering Co shares in Q3 2025, an estimated $1.03M.
  • Marshall Wace first reported a position in Mayville Engineering Co in Q4 2019 and held it in 7 quarters.
  • Marshall Wace's Mayville Engineering Co position peaked at $1.36M in Q1 2025.
  • 104 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q3 2025.

Based on Marshall Wace's 13F filing for Q3 2025, filed 13 Nov 2025.