Notice of Proposed Sale · 144
Mayville Engineering Company, Inc.
MECNYSEEQUITYCurrent
Notice of Proposed Sale
Structured filing — 144
primary_doc.xml
Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.
Proposed-sale notice
- Issuer
- Mayville Engineering Company, Inc.
- Issuer CIK
- 0001766368
- SEC file number
- 001-38894
- Phone
- 920-387-4500
- Person for whose account securities are to be sold
- Leuba Sean P
- Relationships to issuer
- Officer
- Street
- 715 SOUTH STREET
- City
- MAYVILLE
- State / country code
- WI
- Postal code
- 53050
Securities proposed for sale
| Security | Proposed units | Aggregate market value | Units outstanding | Approximate sale date | Exchange | Broker / market maker |
|---|---|---|---|---|---|---|
| Common | 1,015 | 25,689.65 | 25,500,331 | 08/06/2026 | NYSE | Vanguard Marketing Corporation |
Broker / market maker — proposed row 1, entry 1
- Name
- Vanguard Marketing Corporation
- Street
- 5951 Luckett Court
- Street (continued)
- Suite A1
- City
- El Paso
- State / country code
- TX
- Postal code
- 79932
Acquisition of securities to be sold
| Security | Acquired | Nature of acquisition | Acquired from | Amount acquired | Gift transaction | Payment date | Nature of payment |
|---|---|---|---|---|---|---|---|
| Common | 05/07/2026 | Inherited Shares From Deceased Father | Paul E. Leuba | 1,015 | N | 05/07/2026 | Inheritence |
Sales reported in the preceding three months
| Seller | Security | Sale date | Amount sold | Gross proceeds |
|---|---|---|---|---|
| Sean P Leuba | Mayville Engineering Company Common Stock | 08/06/2026 | 11,840 | 301,450.01 |
Seller — prior-sale row 1, entry 1
- Name
- Sean P Leuba
- Street
- 715 South Street
- City
- Mayville
- State / country code
- WI
- Postal code
- 53050
Prior-sale reporting
- Nothing to report for the preceding three months
- N
Notice signature
- Notice date
- 08/06/2026
- Signed
- Sean P Leuba
Company context
Founded in 1945, MEC is a leading U.S.-based, vertically-integrated, value-added manufacturing partner providing a full suite of manufacturing solutions from concept to production, including design, prototyping and tooling, fabrication, aluminum extrusion, coating, assembly and aftermarket components. Our customers operate in diverse end markets, including heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, datacenter & critical power, agriculture, military and other end markets. Along with process engineering and development services, MEC maintains an extensive manufacturing infrastructure with 27 facilities, of which 22 are in use, across nine states. These facilities make it possible to offer conventional and CNC (computer numerical control) stamping, shearing, fiber laser cutting, forming, drilling, tapping, grinding, tube bending, machining, welding, assembly, and logistic services. MEC also possesses a broad range of finishing capabilities including shot blasting, e-coating, powder coating, wet spray and military grade chemical agent resistant coating (CARC) painting. For more information, please visit www.mecinc.com.