Portolan Capital Management, LLC
Position in MEC — Mayville Engineering Company, Inc.
CIK 1350290
BOSTON, MA
Position in MEC
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$48,670,129
+$33,930,738 QoQ
Shares Held
1,299,256
+58.2% QoQ
Ownership
5.10%
of shares outstanding
% of Portfolio
1.83%
of 13F equity value
Holder Rank
#1
of 154 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MEC Over Time
Shares Held
Position Value (USD)
Position in Metal Fabrication
Industrials · as of Jun 30, 2026Portolan Capital Management, LLC holds $48,670,129 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
|
1,299,256 | $48,670,129 |
All Filings in MEC
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $48,670,129 | 1,299,256 | Shares | Sole | 2026-08-14 | |
| 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. | ||||||