Mayville Engineering Company, Inc.
Mayville Engineering Company, Inc. (MEC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MEC · as of Sep 30, 2025
Ownership Breakdown
104
Institutional Holders
▼ 7 vs Q2
$183.56M
Total Inst. Value
▼ $18.96M vs Q2
20.49M
Shares Outstanding
freeFloat 70.72%
13.28M
13F Shares Held
▲ 638,050 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MEC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC metal forgings & stampings | 2.41M | 11.75% | 11.75% | $32.89B | Oct 20, 2025 | ▼ 35.0K |
BLACKROCK, INC. metal forgings & stampings | 914.8K | 4.46% | 4.46% | $12.59B | Nov 12, 2025 | ▲ 1.6K |
VANGUARD GROUP INC metal forgings & stampings | 871.7K | 4.25% | 4.25% | $11.99B | Nov 7, 2025 | ▼ 10.5K |
DIMENSIONAL FUND ADVISORS LP metal forgings & stampings | 847.1K | 4.13% | 4.13% | $11.66B | Nov 12, 2025 | ▲ 33.1K |
ROYCE & ASSOCIATES LP metal forgings & stampings | 566.7K | 2.76% | 2.76% | $7.80B | Nov 12, 2025 | ▲ 7.9K |
TOCQUEVILLE ASSET MANAGEMENT L.P. metal forgings & stampings | 521.1K | 2.54% | 2.54% | $7.17B | Nov 13, 2025 | ▼ 50.1K |
22NW, LP metal forgings & stampings | 399.9K | 1.95% | 1.95% | $5.50B | Nov 14, 2025 | ▲ 244.4K |
AMERIPRISE FINANCIAL INC metal forgings & stampings | 394.2K | 1.92% | 1.92% | $5.42B | Nov 14, 2025 | ▲ 354.5K |
BLAIR WILLIAM & CO/IL metal forgings & stampings | 377.2K | 1.84% | 1.84% | $5.19B | Nov 12, 2025 | ▲ 3.8K |
AMERICAN CENTURY COMPANIES INC metal forgings & stampings | 364.8K | 1.78% | 1.78% | $5.02B | Nov 12, 2025 | ▲ 57.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
29
Increased
+1.14M shares2
New Positions
first time holders12
Decreased
−468.2K shares0
Sold Out
fully exitedNet shares change (top 50)
+670.1K
+1.14M / −468.2K
Net new holders
+19
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MEC insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
14
Buy transactions
13
Sell transactions
1.08
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Reddy Jagadeesh A President & CEO | Jun 1, 2026 | Sale | 17,294 | $30.00 | $518.8K | 141.1K | Form 4 ↗ |
Reddy Jagadeesh A President & CEO | Jun 1, 2026 | Sale | 17,942 | $30.00 | $538.3K | 140.4K | Form 4 ↗ |
Raber Ryan F EVP - Strategy, Sales & Mktg | May 26, 2026 | Sale | 20,000 | $26.00 | $520.0K | 87.0K | Form 4 ↗ |
Nichols Craig D SVP, Operations & Supply Chain | May 21, 2026 | Sale | 4,000 | $23.24 | $93.0K | 146 | Form 4 ↗ |
Leuba Sean P SVP, GC & Secretary | May 8, 2026 | Gift | 1,015 | — | — | 19.5K | Form 4 ↗ |
Reddy Jagadeesh A President & CEO | May 7, 2026 | Sale | 10,332 | $25.72 | $265.7K | 169.9K | Form 4 ↗ |
Reddy Jagadeesh A President & CEO | May 7, 2026 | Sale | 11,464 | $26.11 | $299.3K | 158.4K | Form 4 ↗ |
Wingfield Tania director | Apr 21, 2026 | Award | 5,959 | — | — | 6.0K | Form 4 ↗ |
Schyvinck Christine M. Chair of the Board | Apr 21, 2026 | Award | 5,959 | — | — | 6.0K | Form 4 ↗ |
Rothman Jay O. director | Apr 21, 2026 | Award | 5,959 | — | — | 71.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Mayville Engineering Company, Inc. (MEC) is primarily owned by institutional investors, who hold approximately 64.8% of total shares outstanding. Company insiders own approximately 29.28%, while retail and public investors account for the remaining 5.92%.
The largest institutional shareholder of Mayville Engineering Company, Inc. is ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC, holding approximately 2.41 million shares — equal to 11.75% of outstanding shares — as of September 30, 2025.
A total of 104 institutional investors currently hold MEC stock, with a combined institutional value of approximately $183,556,593 as of the most recent 13F filing period.
Frequently asked questions
MEC ownershipMayville Engineering Company, Inc. (MEC) is primarily owned by institutional investors, who hold approximately 64.8% of shares. The largest shareholder is ALLSPRING GLOBAL INVESTMENTS HOLDINGS, LLC with a 11.75% stake. Company insiders hold 29.28%. Data sourced from SEC Form 13F as of September 30, 2025.