Latest Period
Q1 2026
Security Snapshot
Mayville Engineering Company, Inc. - Common stock, no par value (MEC) Institutional Ownership
CUSIP: 578605107
13F Institutional Holders and Ownership History from Q2 2019 to Q1 2026
Institutions Reporting
123
Shares (Excl. Options)
14,361,474
Price
$17.95
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- Security type / class
- Equity / Common stock, no par value
- Symbol
- MEC on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 14,361,474
- Total 13F value
- $257,734,210
- Portfolio coverage rank
- 0%
- Share change
- +402,562
- Value change
- +$6,725,676
- Number of holders
- 123
- Shares outstanding
- 24,746,689
- SEC-reported price per share
- $27.20
- Insider filing price
- $27.20
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MEC - Mayville Engineering Company, Inc. - Common stock, no par value is tracked under CUSIP 578605107.
- 123 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 121 to 123 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $259,718,429 to $257,734,210.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 123 institutions filings for Q1 2026.
Security key
578605107
Latest holder period
Q1 2026
13F holders
123
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
MEC full holder history
Mayville Engineering Company, Inc. SEC filings
Mayville Engineering Company, Inc. company facts
Mayville Engineering Company, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 578605107:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
MEC
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Allspring Global Investments Holdings, LLC | 10% | -14% | $38,423,273 | -$7,244,012 | 2,052,613 | -16% | Allspring Global Investments Holdings, LLC | 31 Dec 2025 |
| Portolan Capital Management, LLC | 5.9% | $26,677,723 | 1,465,004 | Portolan Capital Management, LLC | 20 May 2026 | |||
| Hilve Holdings Ltd | 4.9% | $18,331,868 | 995,756 | Hilve Holdings Ltd | 27 Oct 2025 |
As of 31 Mar 2026, 123 institutional investors reported holding 14,361,474 shares of Mayville Engineering Company, Inc. - Common stock, no par value (MEC). This represents 58% of the company’s total 24,746,689 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
47%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Allspring Global Investments Holdings, LLC | 8.1% | 2,000,350 | -2.5% | 0.06% | $35,846,272 |
| DIMENSIONAL FUND ADVISORS LP | 3.7% | 926,216 | +5.6% | 0% | $16,624,513 |
| BlackRock, Inc. | 3.6% | 881,854 | +1.9% | 0% | $15,829,285 |
| Portolan Capital Management, LLC | 3.3% | 821,136 | +60% | 0.78% | $14,739,391 |
| ROYCE & ASSOCIATES LP | 3% | 751,001 | +20% | 0.13% | $13,480,468 |
| EVR Research LP | 2.5% | 620,000 | +2.5% | 6.3% | $11,129,000 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.4% | 594,938 | 0% | 0% | $10,679,137 |
| BLAIR WILLIAM & CO/IL | 2.3% | 565,300 | -3.2% | 0.03% | $10,147,135 |
| First Eagle Investment Management, LLC | 1.6% | 404,075 | +13% | 0.01% | $7,253,146 |
| Granahan Investment Management, LLC | 1.6% | 387,470 | +45% | 0.34% | $6,955,087 |
| MILLENNIUM MANAGEMENT LLC | 1.5% | 380,972 | +149% | 0.01% | $6,838,447 |
| AMERIPRISE FINANCIAL INC | 1.4% | 351,790 | +0.27% | 0% | $6,314,631 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.4% | 335,835 | +2.1% | 0% | $6,029,901 |
| STATE STREET CORP | 1.2% | 285,850 | +0.3% | 0% | $5,131,008 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 1.1% | 269,681 | +50% | 0.03% | $4,840,774 |
| JB CAPITAL PARTNERS LP | 1% | 250,512 | 0% | 0.77% | $4,496,690 |
| Congruence Capital, LLC | 0.95% | 234,475 | +13% | 1.4% | $4,208,827 |
| Boston Partners | 0.94% | 232,637 | +4.4% | 0% | $4,175,830 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 0.9% | 222,703 | -1.9% | 0.08% | $3,997,519 |
| AMERICAN CENTURY COMPANIES INC | 0.9% | 221,673 | -21% | 0% | $3,979,030 |
| Roubaix Capital, LLC | 0.85% | 210,657 | +44% | 1.8% | $3,781,293 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 0.75% | 185,261 | -36% | 0% | $3,325,435 |
| BANK OF AMERICA CORP /DE/ | 0.74% | 183,599 | -16% | 0% | $3,295,601 |
| Wealthspire Advisors, LLC | 0.57% | 141,607 | +48% | 0.02% | $2,541,846 |
| Panoramic Capital, LLC | 0.57% | 140,000 | 1.8% | $2,513,000 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
28
Latest
Q1 2026
Rows shown
1-25 of 28
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 14,361,474 | $257,734,210 | +$6,725,676 | $17.95 | 123 |
| 2025 Q4 | 13,849,261 | $259,718,429 | +$8,554,832 | $18.72 | 121 |
| 2025 Q3 | 13,280,220 | $183,556,400 | +$8,031,418 | $13.76 | 103 |
| 2025 Q2 | 12,642,160 | $202,514,421 | +$5,377,585 | $15.96 | 110 |
| 2025 Q1 | 12,437,195 | $167,800,883 | -$810,093 | $13.43 | 116 |
| 2024 Q4 | 12,460,649 | $195,440,685 | +$9,374,940 | $15.72 | 112 |
| 2024 Q3 | 11,684,841 | $246,299,140 | +$18,925,395 | $21.08 | 116 |
| 2024 Q2 | 10,752,150 | $179,129,526 | +$20,360,389 | $16.66 | 97 |
| 2024 Q1 | 9,531,006 | $136,580,309 | +$3,169,998 | $14.33 | 79 |
| 2023 Q4 | 9,251,605 | $133,377,230 | +$5,544,845 | $14.42 | 79 |
| 2023 Q3 | 8,911,760 | $97,758,808 | +$2,587,678 | $10.97 | 86 |
| 2023 Q2 | 8,722,452 | $108,700,974 | +$9,649,984 | $12.46 | 86 |
| 2023 Q1 | 7,826,872 | $116,753,603 | +$12,817,034 | $14.92 | 77 |
| 2022 Q4 | 6,970,927 | $88,250,006 | +$6,859,659 | $12.66 | 67 |
| 2022 Q3 | 6,343,054 | $41,305,039 | -$6,939,617 | $6.51 | 57 |
| 2022 Q2 | 7,177,044 | $55,551,627 | -$3,587,082 | $7.74 | 56 |
| 2022 Q1 | 7,472,090 | $70,024,999 | -$530,598 | $9.37 | 63 |
| 2021 Q4 | 7,272,472 | $108,421,167 | -$38,311,391 | $14.91 | 66 |
| 2021 Q3 | 7,482,295 | $140,767,921 | -$13,460,823 | $18.80 | 74 |
| 2021 Q2 | 8,181,835 | $164,531,717 | +$15,440,462 | $20.11 | 58 |
| 2021 Q1 | 7,432,250 | $106,883,984 | +$3,659,676 | $14.38 | 59 |
| 2020 Q4 | 7,179,707 | $96,216,902 | +$5,892,826 | $13.42 | 53 |
| 2020 Q3 | 6,765,494 | $62,171,216 | +$5,572,335 | $9.19 | 49 |
| 2020 Q2 | 6,289,280 | $49,684,412 | +$5,055,444 | $7.90 | 52 |
| 2020 Q1 | 5,706,875 | $34,987,437 | -$3,763,337 | $6.13 | 50 |