As of November 6, 2026, Mayville Engineering Company, Inc. is a publicly traded company (NYSE: MEC); its largest reported holder is BlackRock, with 6.3% on Schedule 13G of October 27, 2026, then Portolan Capital Management, LLC (5.92%). The largest insider holding is Todd M. Butz, the chief financial officer, with 214,741 shares (0.84% of shares outstanding), per Form 4 of March 18, 2025 (Schedule 13G, October 27, 2026).
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Is Mayville Engineering Company, Inc. a real, registered company?
- Mayville Engineering Company, Inc. files with the SEC under CIK 1766368 (its SEC filings).
- Its shares are listed under the ticker MEC on NYSE (SEC company record).
- business address in Mayville, Wisconsin, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under MAYVILLE ENGINEERING CO INC in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names BlackRock (filed 2026-10-27).
Who are Mayville Engineering Company, Inc.'s owners and officers?
Mayville Engineering Company, Inc.: business address in Mayville, Wisconsin; industry Metal Forgings & Stampings (Schedule 13G/A, 2026-11-05).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-11-05 | Fmr LLC | 3.3% |
| Schedule 13G, 2026-10-27 | Blackrock, Inc. | 6.3% |
| Schedule 13G, 2026-08-06 | Fmr LLC | 5% |
| Schedule 13G/A, 2026-07-08 | Allspring Global Investments Holdings, LLC | 4.2% |
| Schedule 13G, 2026-05-28 | Portolan Capital Management, LLC | 5.92% |
| Schedule 13G/A, 2026-02-13 | Hilve Holdings LTD | 4.9% |
| Schedule 13G/A, 2026-01-08 | Allspring Global Investments Holdings, LLC | 10.1% |
| Schedule 13G, 2025-10-29 | Hilve Holdings LTD | 5.3% |
Questions about who owns Mayville Engineering Company, Inc.
Who owns Mayville Engineering Company, Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of Mayville Engineering Company, Inc.: Blackrock, Inc. (6.3%, Schedule 13G, filed 2026-10-27) and Portolan Capital Management, LLC (5.92%, Schedule 13G, filed 2026-05-28).
Who are the largest shareholders of Mayville Engineering Company, Inc.?
By the share each holder's latest filing reports, the largest holders of Mayville Engineering Company, Inc. on this page are Blackrock, Inc. (6.3%) and Portolan Capital Management, LLC (5.92%).
When did Blackrock, Inc. buy into Mayville Engineering Company, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Blackrock, Inc. on this page is the Schedule 13G, filed 2026-10-27, reporting 6.3%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 8 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Mayville Engineering Company, Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
14 cited sources found
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Which insiders own Mayville Engineering Company, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief financial officer: 214,741 shares (0.84% of shares outstanding), 173,743 held directly and 40,998 indirectly (Form 4, 2025-03-18).
- , a director: 153,804 shares (0.60% of shares outstanding) (Form 4, 2026-04-23).
- , the chief executive and president: 126,785 shares (0.50% of shares outstanding), 124,105 held directly and 2,680 indirectly (Form 4, 2026-06-12).
- , the executive vice president - strategy and sales: 113,257 shares (0.44% of shares outstanding), 86,970 held directly and 26,287 indirectly (Form 4, 2026-05-27).
- , a director: 80,713 shares (0.32% of shares outstanding) (Form 4, 2026-04-23).
Shares outstanding: 25,501,050 as of 2026-10-31, from the company's latest SEC cover page.
How much has Mayville Engineering Company, Inc. raised?
No fundraising or offering filing from Mayville Engineering Company, Inc. is on file with us.
Keep reading
More on Mayville Engineering Company, Inc. and the records around it.
Mayville Engineering Company, Inc. elsewhere on the record
- 5%+ stake filings Nov 2026
Companies that share a holder
- Hilve Holdings Ltd also filed stake reports on 2 other companies: BK Technologies Corp (May 2026), electroCore, Inc. (May 2026)
- Portolan Capital Management, LLC also filed stake reports on 13 other companies: LANTRONIX, INC. (Oct 2026), SILICOM LTD. (Sep 2026), Quanterix Corp (Aug 2026)
- Allspring Global Investments Holdings, LLC also filed stake reports on 49 other companies: abrdn Emerging Markets ex Chin (Oct 2026), AMC Global Media Inc (Oct 2026), EverQuote Inc (Oct 2026)
Related pages
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