Citadel Advisors
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Citadel Advisors’s Mayville Engineering Co MEC Stock Holding History

Citadel Advisors’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
Q2 		– Sell
-7,400
Closed -$99.4K – 14047
2025
Q1 		$99.4K Buy
7,400
+2,900
+64% +$43.6K ﹤0.01% 11479
2024
Q4 		$70.7K Buy
4,500
+2,200
+96% +$40.2K ﹤0.01% 11949
2024
Q3 		$48.5K Buy
2,300
+1,100
+92% +$20.6K ﹤0.01% 11950
2024
Q2 		$20K Sell
1,200
-1,100
-48% -$16.6K ﹤0.01% 12640
2024
Q1 		$33K Sell
2,300
-23,700
-91% -$309K ﹤0.01% 12603
2023
Q4 		$375K Buy
26,000
+6,600
+34% +$81.9K ﹤0.01% 8701
2023
Q3 		$213K Buy
19,400
+4,700
+32% +$54.3K ﹤0.01% 9780
2023
Q2 		$183K Buy
14,700
+13,900
+1,738% +$176K ﹤0.01% 10026
2023
Q1 		$11.9K Buy
+800
New +$11.7K ﹤0.01% 13447

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

Citadel Advisors's MEC Position: Q1 2026 in Review

Citadel Advisors reduced its Mayville Engineering Co (MEC) stake by 45% in Q1 2026, selling an estimated $899K and leaving 56,786 shares worth $1.02M. The position accounts for ﹤0.01% of the portfolio, ranked #7613.

Citadel Advisors first reported a position in MEC in Q1 2022 and has held it in 14 quarters since. The position peaked at $1.94M in Q4 2025. 124 funds tracked by Wall St. Rank hold MEC as of Q1 2026.

  • Citadel Advisors held 56,786 shares of Mayville Engineering Co worth $1.02M as of Q1 2026.
  • Citadel Advisors sold 46,677 Mayville Engineering Co shares in Q1 2026, an estimated $899K.
  • Mayville Engineering Co made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #7613 holding.
  • Citadel Advisors first reported a position in Mayville Engineering Co in Q1 2022 and has held it in 14 quarters since.
  • Citadel Advisors's Mayville Engineering Co position peaked at $1.94M in Q4 2025.
  • 124 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.