Portolan Capital Management, LLC
Position in MEC — Mayville Engineering Company, Inc.
CIK 1350290
BOSTON, MA
Position in MEC
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$14,739,391
+$5,140,487 QoQ
Shares Held
821,136
+60.1% QoQ
Ownership
4.01%
of shares outstanding
% of Portfolio
0.80%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2025
2 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in MEC Over Time
Shares Held
Position Value (USD)
Position in Metal Fabrication
Industrials · as of Mar 31, 2026Portolan Capital Management, LLC holds $14,739,391 across 1 Metal Fabrication name. MEC ranks #1 (100.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MEC |
Mayville Engineering Company, Inc.
This page
|
821,136 | $14,739,391 |
All Filings in MEC
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3 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-05-20 | $35,086,845 | 1,465,004 | Shares | Sole | 2026-05-28 | |
| 2026-03-31 | $14,739,391 | 821,136 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $9,598,904 | 512,762 | Shares | Sole | 2026-02-17 | |
| No filing history on record for this holder in this stock. | ||||||