Mayville Engineering Company, Inc. (MEC) ownership: Top institutional holder: Allspring Global Investments Holdings, LLC ($35.85M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Allspring Global Investments Holdings, LLC | 2000350.00 | $35.85M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 926216.00 | $16.62M | 2026-03-31 |
| BlackRock, Inc. | 881854.00 | $15.83M | 2026-03-31 |
| Portolan Capital Management, LLC | 821136.00 | $14.74M | 2026-03-31 |
| ROYCE & ASSOCIATES LP | 751001.00 | $13.48M | 2026-03-31 |
| VANGUARD GROUP INC | 627655.00 | $11.75M | 2025-12-31 |
| EVR Research LP | 620000.00 | $11.13M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 594938.00 | $10.68M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-05-26 | |
| Sell | null | 2026-05-21 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-07 | |
| Sell | null | 2026-05-07 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.