RhumbLine Advisers
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RhumbLine Advisers’s Mayville Engineering Co MEC Stock Holding History

RhumbLine Advisers’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 		$749K Buy
20,001
+1,801
+10% +$48.1K ﹤0.01% 2503
2026
Q1 		$327K Buy
18,200
+168
+0.9% +$3.23K ﹤0.01% 2876
2025
Q4 		$338K Sell
18,032
-2,021
-10% -$33K ﹤0.01% 2899
2025
Q3 		$276K Buy
20,053
+84
+0.4% +$1.26K ﹤0.01% 3052
2025
Q2 		$319K Buy
19,969
+1,526
+8% +$21.8K ﹤0.01% 2952
2025
Q1 		$248K Sell
18,443
-742
-4% -$11.2K ﹤0.01% 3000
2024
Q4 		$302K Buy
19,185
+613
+3% +$11.2K ﹤0.01% 2982
2024
Q3 		$391K Sell
18,572
-709
-4% -$13.3K ﹤0.01% 2872
2024
Q2 		$321K Buy
19,281
+6,348
+49% +$96K ﹤0.01% 2957
2024
Q1 		$185K Sell
12,933
-164
-1% -$2.14K ﹤0.01% 3220
2023
Q4 		$189K Sell
13,097
-171
-1% -$2.12K ﹤0.01% 3218
2023
Q3 		$146K Buy
13,268
+518
+4% +$5.98K ﹤0.01% 3321
2023
Q2 		$159K Buy
+12,750
New +$161K ﹤0.01% 3357

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

RhumbLine Advisers's MEC Position: Q2 2026 in Review

RhumbLine Advisers increased its Mayville Engineering Co (MEC) stake by 9.9% in Q2 2026, buying an estimated $48.1K and bringing the position to 20,001 shares worth $749K. The position accounts for ﹤0.01% of the portfolio, ranked #2503.

RhumbLine Advisers first reported a position in MEC in Q2 2023 and has held it in 13 quarters since. 155 funds tracked by Wall St. Rank hold MEC as of Q2 2026.

  • RhumbLine Advisers held 20,001 shares of Mayville Engineering Co worth $749K as of Q2 2026.
  • RhumbLine Advisers bought 1,801 Mayville Engineering Co shares in Q2 2026, an estimated $48.1K.
  • Mayville Engineering Co made up ﹤0.01% of RhumbLine Advisers's portfolio in Q2 2026, its #2503 holding.
  • RhumbLine Advisers first reported a position in Mayville Engineering Co in Q2 2023 and has held it in 13 quarters since.
  • 155 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q2 2026.

Based on RhumbLine Advisers's 13F filing for Q2 2026, filed 12 Aug 2026.