Group One Trading
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Group One Trading’s Mayville Engineering Co MEC Stock Holding History

Group One Trading’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
Q4 		– Sell
-400
Closed -$5.5K – 8755
2025
Q3 		$5.5K Hold
400
– – ﹤0.01% 7493
2025
Q2 		$6.38K Buy
+400
New +$5.71K ﹤0.01% 6973
2024
Q4 		– Sell
-800
Closed -$16.9K – 7678
2024
Q3 		$16.9K Sell
800
-1,800
-69% -$33.7K ﹤0.01% 5325
2024
Q2 		$43.3K Buy
2,600
+100
+4% +$1.51K ﹤0.01% 4622
2024
Q1 		$35.8K Buy
+2,500
New +$32.6K ﹤0.01% 4984
2023
Q3 		– Sell
-1,600
Closed -$19.9K – 8021
2023
Q2 		$19.9K Buy
+1,600
New +$20.2K ﹤0.01% 5998

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
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 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
William Blair & Company
William Blair & Company Chicago, Illinois $34.9B AUM 18.88% 1-Year Est. Return
PCM
Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 1-Year Est. Return
2L
22NW LP Seattle, Washington $146M AUM 29.83% 1-Year Est. Return
First Eagle Investment Management
First Eagle Investment Management New York $59B AUM 32.99% 1-Year Est. Return

Group One Trading's MEC Position: Q2 2025 in Review

Group One Trading sold out of Mayville Engineering Co (MEC) in Q2 2025, closing a stake of 400 shares — an estimated $5.71K sold.

Group One Trading first reported a position in MEC in Q2 2023 and held it in 6 quarters. The position peaked at $173K in Q2 2023. 112 funds tracked by Wall St. Rank hold MEC as of Q2 2025.

  • Group One Trading reported no remaining Mayville Engineering Co position as of Q2 2025 after selling out during the quarter.
  • Group One Trading sold 400 Mayville Engineering Co shares in Q2 2025, an estimated $5.71K.
  • Group One Trading first reported a position in Mayville Engineering Co in Q2 2023 and held it in 6 quarters.
  • Group One Trading's Mayville Engineering Co position peaked at $173K in Q2 2023.
  • 112 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q2 2025.

Based on Group One Trading's 13F filing for Q2 2025, filed 14 Aug 2025.