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O'Shaughnessy Asset Management’s Mayville Engineering Co MEC Stock Holding History

O'Shaughnessy Asset 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 		$816K Sell
21,785
-4,585
-17% -$123K ﹤0.01% 1365
2026
Q1 		$473K Sell
26,370
-774
-3% -$14.9K ﹤0.01% 1557
2025
Q4 		$508K Sell
27,144
-2,704
-9% -$44.1K ﹤0.01% 1495
2025
Q3 		$411K Sell
29,848
-746
-2% -$11.2K ﹤0.01% 1590
2025
Q2 		$488K Buy
30,594
+17
+0.1% +$243 ﹤0.01% 1392
2025
Q1 		$411K Sell
30,577
-10,786
-26% -$162K ﹤0.01% 1418
2024
Q4 		$650K Buy
41,363
+943
+2% +$17.2K 0.01% 1170
2024
Q3 		$851K Buy
40,420
+15,356
+61% +$287K 0.01% 962
2024
Q2 		$418K Buy
25,064
+7,906
+46% +$120K ﹤0.01% 1209
2024
Q1 		$246K Sell
17,158
-13,727
-44% -$179K ﹤0.01% 1413
2023
Q4 		$445K Sell
30,885
-4,865
-14% -$60.4K 0.01% 1052
2023
Q3 		$392K Sell
35,750
-11,074
-24% -$128K 0.01% 1013
2023
Q2 		$583K Buy
46,824
+15,872
+51% +$201K 0.01% 822
2023
Q1 		$462K Buy
+30,952
New +$451K 0.01% 895
2022
Q1 		– Sell
-10,621
Closed -$158K – 1328
2021
Q4 		$158K Sell
10,621
-10,450
-50% -$172K ﹤0.01% 1089
2021
Q3 		$396K Buy
21,071
+1,410
+7% +$24.2K 0.01% 741
2021
Q2 		$395K Buy
19,661
+2,794
+17% +$49.3K 0.01% 756
2021
Q1 		$243K Buy
16,867
+6,091
+57% +$89.8K 0.01% 850
2020
Q4 		$145K Buy
+10,776
New +$119K ﹤0.01% 949

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

O'Shaughnessy Asset Management's MEC Position: Q2 2026 in Review

O'Shaughnessy Asset Management reduced its Mayville Engineering Co (MEC) stake by 17% in Q2 2026, selling an estimated $123K and leaving 21,785 shares worth $816K. The position accounts for ﹤0.01% of the portfolio, ranked #1365.

O'Shaughnessy Asset Management first reported a position in MEC in Q4 2020 and has held it in 19 quarters since. The position peaked at $851K in Q3 2024. 155 funds tracked by Wall St. Rank hold MEC as of Q2 2026.

  • O'Shaughnessy Asset Management held 21,785 shares of Mayville Engineering Co worth $816K as of Q2 2026.
  • O'Shaughnessy Asset Management sold 4,585 Mayville Engineering Co shares in Q2 2026, an estimated $123K.
  • Mayville Engineering Co made up ﹤0.01% of O'Shaughnessy Asset Management's portfolio in Q2 2026, its #1365 holding.
  • O'Shaughnessy Asset Management first reported a position in Mayville Engineering Co in Q4 2020 and has held it in 19 quarters since.
  • O'Shaughnessy Asset Management's Mayville Engineering Co position peaked at $851K in Q3 2024.
  • 155 funds tracked by Wall St. Rank held Mayville Engineering Co as of Q2 2026.

Based on O'Shaughnessy Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.