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CenterBook Partners’s Mayville Engineering Co MEC Stock Holding History

CenterBook Partners’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 		$1.16M Sell
30,992
-89,311
-74% -$2.39M 0.06% 331
2026
Q1 		$2.16M Sell
120,303
-135,488
-53% -$2.61M 0.12% 228
2025
Q4 		$4.79M Buy
255,791
+78,132
+44% +$1.27M 0.23% 108
2025
Q3 		$2.44M Buy
177,659
+82,573
+87% +$1.24M 0.12% 228
2025
Q2 		$1.52M Sell
95,086
-3,467
-4% -$49.5K 0.08% 271
2025
Q1 		$1.32M Buy
+98,553
New +$1.48M 0.08% 265

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

CenterBook Partners's MEC Position: Q2 2026 in Review

CenterBook Partners reduced its Mayville Engineering Co (MEC) stake by 74% in Q2 2026, selling an estimated $2.39M and leaving 30,992 shares worth $1.16M. The position accounts for 0.06% of the portfolio, ranked #331.

CenterBook Partners first reported a position in MEC in Q1 2025 and has held it in 6 quarters since. The position peaked at $4.79M in Q4 2025. 155 funds tracked by Wall St. Rank hold MEC as of Q2 2026.

  • CenterBook Partners held 30,992 shares of Mayville Engineering Co worth $1.16M as of Q2 2026.
  • CenterBook Partners sold 89,311 Mayville Engineering Co shares in Q2 2026, an estimated $2.39M.
  • Mayville Engineering Co made up 0.06% of CenterBook Partners's portfolio in Q2 2026, its #331 holding.
  • CenterBook Partners first reported a position in Mayville Engineering Co in Q1 2025 and has held it in 6 quarters since.
  • CenterBook Partners's Mayville Engineering Co position peaked at $4.79M in Q4 2025.
  • 155 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q2 2026.

Based on CenterBook Partners's 13F filing for Q2 2026, filed 11 Aug 2026.