Millennium Management
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Millennium Management’s Mayville Engineering Co MEC Stock Holding History

Millennium 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
Q2 		$9.5M Sell
253,677
-127,295
-33% -$3.4M ﹤0.01% 2326
2026
Q1 		$6.84M Buy
380,972
+227,772
+149% +$4.39M ﹤0.01% 2588
2025
Q4 		$2.87M Buy
+153,200
New +$2.5M ﹤0.01% 3611
2025
Q2 		– Sell
-112,350
Closed -$1.51M – 6158
2025
Q1 		$1.51M Buy
112,350
+82,006
+270% +$1.23M ﹤0.01% 4042
2024
Q4 		$477K Buy
+30,344
New +$555K ﹤0.01% 4788
2024
Q1 		– Sell
-14,171
Closed -$204K – 6462
2023
Q4 		$204K Sell
14,171
-1,176
-8% -$14.6K ﹤0.01% 5169
2023
Q3 		$168K Buy
15,347
+715
+5% +$8.26K ﹤0.01% 5181
2023
Q2 		$182K Sell
14,632
-96,372
-87% -$1.22M ﹤0.01% 5157
2023
Q1 		$1.66M Buy
111,004
+23,880
+27% +$348K ﹤0.01% 3619
2022
Q4 		$1.1M Sell
87,124
-106,464
-55% -$1.06M ﹤0.01% 4069
2022
Q3 		$1.26M Sell
193,588
-33,253
-15% -$239K ﹤0.01% 4139
2022
Q2 		$1.76M Buy
226,841
+178,084
+365% +$1.51M ﹤0.01% 3838
2022
Q1 		$457K Buy
48,757
+28,329
+139% +$322K ﹤0.01% 5193
2021
Q4 		$305K Buy
+20,428
New +$337K ﹤0.01% 5524
2019
Q4 		– Sell
-20,392
Closed -$268K – 4475
2019
Q3 		$268K Sell
20,392
-67,505
-77% -$902K ﹤0.01% 3621
2019
Q2 		$1.21M Buy
+87,897
New +$1.35M ﹤0.01% 2691

Other funds holding MEC

PCM
Portolan Capital Management Boston, Massachusetts $2.67B AUM 169.09% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Allspring Global Investments
Allspring Global Investments Charlotte, North Carolina $65.2B AUM 39.42% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
SPPAM
Summit Partners Public Asset Management Boston, Massachusetts $5.69B AUM 259.25% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
RA
Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

Millennium Management's MEC Position: Q2 2026 in Review

Millennium Management reduced its Mayville Engineering Co (MEC) stake by 33% in Q2 2026, selling an estimated $3.4M and leaving 253,677 shares worth $9.5M. The position accounts for ﹤0.01% of the portfolio, ranked #2326.

Millennium Management first reported a position in MEC in Q2 2019 and has held it in 16 quarters since. 155 funds tracked by Wall St. Rank hold MEC as of Q2 2026.

  • Millennium Management held 253,677 shares of Mayville Engineering Co worth $9.5M as of Q2 2026.
  • Millennium Management sold 127,295 Mayville Engineering Co shares in Q2 2026, an estimated $3.4M.
  • Mayville Engineering Co made up ﹤0.01% of Millennium Management's portfolio in Q2 2026, its #2326 holding.
  • Millennium Management first reported a position in Mayville Engineering Co in Q2 2019 and has held it in 16 quarters since.
  • 155 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q2 2026.

Based on Millennium Management's 13F filing for Q2 2026, filed 14 Aug 2026.