梅維爾工程公司
US ˙ NYSE ˙ US5786051079

SecurityMEC / Mayville Engineering Company, Inc.
InstitutionQUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series
Latest Disclosed Ownership22,995 shares
Latest Disclosed Value $ 367,000
QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series ownership in MEC / Mayville Engineering Company, Inc.

On August 26, 2025 - QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series filed a NPORT-P form disclosing ownership of 22,995 shares of Mayville Engineering Company, Inc. (US:MEC) valued at $367,000 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 22,995 shares of Mayville Engineering Company, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $764,584 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)
2025-08-26 2025-06-30 NP Mayville Engineering EC US5786051079 22,995 0 0.00 367 19.16 0.0082
2025-05-28 2025-03-31 NP Mayville Engineering EC US5786051079 22,995 0 0.00 309 -14.68 0.0074
2025-02-25 2024-12-31 NP Mayville Engineering EC US5786051079 22,995 -2,369 -9.34 361 -32.40 0.0079
2024-11-26 2024-09-30 NP Mayville Engineering EC US5786051079 25,364 3,616 16.63 535 47.51 0.0101
2024-08-26 2024-06-30 NP Mayville Engineering EC US5786051079 21,748 0 0.00 362 16.40 0.0074
2024-05-28 2024-03-31 NP Mayville Engineering EC US5786051079 21,748 0 0.00 312 -0.64 0.0065
2024-02-26 2023-12-31 NP Mayville Engineering EC US5786051079 21,748 3,701 20.51 314 58.88 0.0067
2023-11-28 2023-09-30 NP Mayville Engineering EC US5786051079 18,047 0 0.00 198 -12.05 0.0052
2023-08-25 2023-06-30 NP Mayville Engineering EC US5786051079 18,047 5,490 43.72 225 91.45 0.0053
2022-05-26 2022-03-31 NP Mayville Engineering EC US5786051079 12,557 0 0.00 118 -37.43 0.0027
2022-02-25 2021-12-31 NP Mayville Engineering EC US5786051079 12,557 3,143 33.39 187 6.25 0.0041
2021-11-24 2021-09-30 NP Mayville Engineering EC US5786051079 9,414 0 0.00 177 -6.88 0.0039
2021-08-26 2021-06-30 NP Mayville Engineering EC US5786051079 9,414 0 0.00 189 40.00 0.0041
2021-05-27 2021-03-31 NP Mayville Engineering EC US5786051079 9,414 0 0.00 135 7.14 0.0031
2021-02-25 2020-12-31 NP Mayville Engineering EC US5786051079 9,414 0 0.00 126 46.51 0.0032
2020-11-25 2020-09-30 NP Mayville Engineering EC US5786051079 9,414 0 0.00 87 16.22 0.0028
2020-08-27 2020-06-30 NP Mayville Engineering EC US5786051079 9,414 0 0.00 74 29.82 0.0024
2020-06-01 2020-03-31 NP Mayville Engineering EC US5786051079 9,414 0 0.00 58 -35.23 0.0024
2020-02-27 2019-12-31 NP Mayville Engineering EC 578605107 9,414 0 0.00 88 -29.03 0.0027
2019-11-27 2019-09-30 NP Mayville Engineering EC US5786051079 9,414 9,414 124 0.0041
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.