SEI Investments
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SEI Investments’s Mayville Engineering Co MEC Stock Holding History

SEI Investments’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 		$2.21M Buy
122,878
+39,309
+47% +$757K ﹤0.01% 1958
2025
Q4 		$1.56M Buy
83,569
+28,255
+51% +$461K ﹤0.01% 1978
2025
Q3 		$761K Buy
55,314
+3,824
+7% +$57.5K ﹤0.01% 2073
2025
Q2 		$822K Buy
51,490
+6,103
+13% +$87.2K ﹤0.01% 2000
2025
Q1 		$610K Sell
45,387
-3,183
-7% -$47.9K ﹤0.01% 2079
2024
Q4 		$764K Buy
48,570
+2,353
+5% +$43K ﹤0.01% 2042
2024
Q3 		$974K Buy
46,217
+7,585
+20% +$142K ﹤0.01% 1955
2024
Q2 		$644K Buy
38,632
+5,444
+16% +$82.3K ﹤0.01% 2072
2024
Q1 		$476K Hold
33,188
– – ﹤0.01% 2128
2023
Q4 		$479K Sell
33,188
-956
-3% -$11.9K ﹤0.01% 2128
2023
Q3 		$375K Buy
34,144
+6,564
+24% +$75.8K ﹤0.01% 2223
2023
Q2 		$344K Buy
27,580
+2,834
+11% +$35.8K ﹤0.01% 2284
2023
Q1 		$369K Buy
+24,746
New +$361K ﹤0.01% 2255
2022
Q4 		– Sell
-15,592
Closed -$102K – 2619
2022
Q3 		$102K Hold
15,592
– – ﹤0.01% 2563
2022
Q2 		$121K Buy
+15,592
New +$132K ﹤0.01% 2544

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
PCM
Portolan Capital Management Boston, Massachusetts $1.88B AUM 115.74% 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

SEI Investments's MEC Position: Q1 2026 in Review

SEI Investments increased its Mayville Engineering Co (MEC) stake by 47% in Q1 2026, buying an estimated $757K and bringing the position to 122,878 shares worth $2.21M. The position accounts for ﹤0.01% of the portfolio, ranked #1958.

SEI Investments first reported a position in MEC in Q2 2022 and has held it in 15 quarters since. 124 funds tracked by Wall St. Rank hold MEC as of Q1 2026.

  • SEI Investments held 122,878 shares of Mayville Engineering Co worth $2.21M as of Q1 2026.
  • SEI Investments bought 39,309 Mayville Engineering Co shares in Q1 2026, an estimated $757K.
  • Mayville Engineering Co made up ﹤0.01% of SEI Investments's portfolio in Q1 2026, its #1958 holding.
  • SEI Investments first reported a position in Mayville Engineering Co in Q2 2022 and has held it in 15 quarters since.
  • 124 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.