Mayville Engineering Company, I

Historical 13F Holders

Symbol
MEC
CUSIP
578605107
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 578605107 since 12/18/2024, largest first.

Filer % of Class Filed
Portolan Capital Management, LLC 13G
5.9% 5/28/2026
Event 5/20/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (3)
FMR LLC 13G
5.0%
Checked 5% or less
8/6/2026
Event 6/30/2026
Hilve Holdings Ltd 13G/A
4.9% 2/13/2026
Event 10/27/2025
Allspring Global Investments Holdings, LLC 13G/A 4.2% 7/8/2026
Event 6/30/2026

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 6 114 k $1.71 M
2026 Q2 168 21.6 M $806 M
2026 Q1 125 14.4 M $258 M
2025 Q4 126 13.9 M $260 M
2025 Q3 106 13.3 M $184 M
2025 Q2 116 12.7 M $203 M
2025 Q1 121 12.4 M $168 M
2024 Q4 120 12.5 M $194 M
2024 Q3 121 11.7 M $246 M
2024 Q2 105 10.8 M $179 M
2024 Q1 91 9.65 M $138 M
2023 Q4 88 9.29 M $134 M
2023 Q3 92 8.93 M $98.0 M
2023 Q2 91 8.72 M $109 M
2023 Q1 80 7.83 M $117 M
2022 Q4 71 7.03 M $88.9 M
2022 Q3 60 6.34 M $41.3 M
2022 Q2 65 7.18 M $55.6 M
2022 Q1 66 7.47 M $70.0 M
2021 Q4 71 7.29 M $109 M
2021 Q3 79 7.50 M $141 M
2021 Q2 59 8.18 M $165 M
2021 Q1 60 7.43 M $107 M
2020 Q4 54 7.18 M $96.2 M
2020 Q3 50 6.77 M $62.2 M
2020 Q2 53 6.29 M $49.7 M
2020 Q1 53 5.71 M $35.0 M
2019 Q4 51 6.18 M $58.0 M
2019 Q3 52 5.86 M $77.3 M
2019 Q2 54 5.83 M $80.4 M