Mayville Engineering Company, Inc.
US ˙ NYSE ˙ US5786051079

SecurityMEC / Mayville Engineering Company, Inc.
InstitutionBarclays Plc
Latest Disclosed Ownership37,025 shares
Latest Disclosed Value $ 693,108
Barclays Plc reports 0.95% increase in ownership of MEC / Mayville Engineering Company, Inc.

On February 13, 2026 - Barclays Plc filed a 13F-HR form disclosing ownership of 37,025 shares of Mayville Engineering Company, Inc. (US:MEC) valued at $693,108 USD as of December 31, 2025. The entity filed a previous 13F-HR/A on March 31, 2026 disclosing 36,677 shares of Mayville Engineering Company, Inc.. This represents a change in shares of 0.95% during the quarter. The current value of the position is $1,209,977 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F MAYVILLE ENGR COM 578605107 37,025 348 0.95 693 37.50 0.0002
2026-03-31 2025-09-30 13F/A-3 MAYVILLE ENGR COM 578605107 36,677 -3,825 -9.44 505 -21.98 0.0001
2026-03-19 2025-09-30 13F/A-2 MAYVILLE ENGR COM 578605107 37,486 -3,016 790 0.0002
2025-11-12 2025-09-30 13F MAYVILLE ENGR COM 578605107 36,677 -3,825 505 0.0001
2026-02-27 2025-06-30 13F/A-2 MAYVILLE ENGR COM 578605107 40,502 10,865 36.66 646 62.31 0.0001
2025-08-14 2025-06-30 13F/A-1 MAYVILLE ENGR COM 578605107 40,502 10,865 1 0.0001
2025-08-13 2025-06-30 13F MAYVILLE ENGR COM 578605107 40,502 10,865 1 0.0000
2026-03-17 2025-03-31 13F/A-1 MAYVILLE ENGR COM 578605107 29,637 -8,506 -22.30 398 -33.56 0.0001
2025-05-15 2025-03-31 13F MAYVILLE ENGR COM 578605107 29,637 -8,506 0 0.0001
2026-03-19 2024-12-31 13F/A-1 MAYVILLE ENGR COM 578605107 38,143 657 1.75 600 -24.18 0.0002
2025-02-13 2024-12-31 13F MAYVILLE ENGR COM 578605107 38,143 657 1 0.0002
2026-03-31 2024-09-30 13F/A-2 MAYVILLE ENGR COM 578605107 37,486 11,489 44.19 790 82.45 0.0002
2024-11-19 2024-09-30 13F/A-1 MAYVILLE ENGR COM 578605107 37,486 11,489 1 0.0002
2024-11-15 2024-09-30 13F MAYVILLE ENGR COM 578605107 37,486 11,489 1 0.0001
2026-03-23 2024-06-30 13F/A-1 MAYVILLE ENGR COM 578605107 25,997 -740 -2.77 433 13.05 0.0001
2024-08-14 2024-06-30 13F MAYVILLE ENGR COM 578605107 25,997 -740 0 0.0001
2026-03-24 2024-03-31 13F/A-1 MAYVILLE ENGR COM 578605107 26,737 -7,696 -22.35 383 -22.78 0.0001
2024-05-15 2024-03-31 13F MAYVILLE ENGR COM 578605107 26,737 -7,696 0 0.0001
2026-03-25 2023-12-31 13F/A-1 MAYVILLE ENGR COM 578605107 34,433 13,585 65.16 497 117.54 0.0002
2024-02-15 2023-12-31 13F MAYVILLE ENGR COM 578605107 34,433 13,585 0 0.0002
2026-03-26 2023-09-30 13F/A-1 MAYVILLE ENGR COM 578605107 20,848 133 0.64 229 -11.63 0.0001
2023-11-07 2023-09-30 13F MAYVILLE ENGR COM 578605107 20,848 133 0 0.0001
2026-03-30 2023-06-30 13F/A-2 MAYVILLE ENGR COM 578605107 20,715 -12,912 -38.40 258 -48.50 0.0002
2023-09-20 2023-06-30 13F/A-1 MAYVILLE ENGR COM 578605107 20,715 -12,912 0 0.0002
2023-08-03 2023-06-30 13F MAYVILLE ENGR COM 578605107 20,715 -12,912 0 0.0002
2026-03-30 2023-03-31 13F/A-1 MAYVILLE ENGR COM 578605107 33,627 5,451 19.35 502 40.73 0.0002
2023-05-04 2023-03-31 13F MAYVILLE ENGR COM 578605107 33,627 5,451 1 0.0002
2026-03-30 2022-12-31 13F/A-1 MAYVILLE ENGR COM 578605107 28,176 -2,813 -9.08 357 76.24 0.0002
2023-02-13 2022-12-31 13F MAYVILLE ENGR COM 578605107 28,176 -2,813 0 0.0002
2022-11-03 2022-09-30 13F MAYVILLE ENGR COM 578605107 30,989 14,918 92.83 202 62.90 0.0002
2022-08-12 2022-06-30 13F MAYVILLE ENGR COM 578605107 16,071 7,302 83.27 124 51.22 0.0001
2022-05-16 2022-03-31 13F MAYVILLE ENGR COM 578605107 8,769 -7,301 -45.43 82 -65.83 0.0001
2022-02-23 2021-12-31 13F/A-1 MAYVILLE ENGR COM 578605107 16,070 9,798 156.22 240 103.39 0.0001
2022-02-14 2021-12-31 13F MAYVILLE ENGR COM 578605107 16,070 9,798 240 0.0000
2021-11-09 2021-09-30 13F MAYVILLE ENGR COM 578605107 6,272 -811 -11.45 118 -17.48 0.0001
2021-08-13 2021-06-30 13F MAYVILLE ENGR COM 578605107 7,083 -5,016 -41.46 143 -17.82 0.0001
2021-05-13 2021-03-31 13F MAYVILLE ENGINEERING COM 578605107 12,099 3,776 45.37 174 55.36 0.0001
2021-02-11 2020-12-31 13F MAYVILLE ENGINEERING COM 578605107 8,323 -369 -4.25 112 41.77 0.0001
2020-11-12 2020-09-30 13F MAYVILLE ENGINEERING COM 578605107 8,692 664 8.27 79 25.40 0.0000
2020-08-12 2020-06-30 13F MAYVILLE ENGINEERING COM 578605107 8,028 5,936 283.75 63 384.62 0.0000
2020-05-13 2020-03-31 13F MAYVILLE ENGINEERING COM 578605107 2,092 -4,213 -66.82 13 -77.97 0.0000
2020-02-10 2019-12-31 13F MAYVILLE ENGINEERING COM 578605107 6,305 3,141 99.27 59 40.48 0.0000
2019-11-15 2019-09-30 13F/A-1 MAYVILLE ENGINEERING COM 578605107 3,164 -3,989 -55.77 42 -57.14 0.0000
2019-11-14 2019-09-30 13F MAYVILLE ENGINEERING COM 578605107 3,164 -3,989 42 9.7104
2019-08-14 2019-06-30 13F MAYVILLE ENGINEERING COM 578605107 7,153 7,153 98 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.