Terminal · Institutions

Every 13F-reported equity position this quarter, with its quarter-over-quarter change — each row traces back to the SEC filing.

Portolan Capital Management, LLC 13F Holdings -- Portfolio & Top Positions (2026-06-30)

Portolan Capital Management, LLC (CIK 1350290) reported $2.67B across 148 reported positions in its SEC 13F filing for 2026-06-30. Largest positions: VPG ($151.1M, 5.66%), VIRT ($127.6M, 4.78%), TTMI ($95.0M, 3.56%), MOD ($83.8M, 3.14%), QLYS ($72.8M, 2.73%). Source: SEC Form 13F.

RankTickerCompanyValue% PortfolioSharesAction
1VPGVISHAY PRECISION GROUP INC$151.1M5.66%1.0MTrimmed
2VIRTVIRTU FINL INC$127.6M4.78%2.1MAdded
3TTMITTM TECHNOLOGIES INC$95.0M3.56%507,838Trimmed
4MODMODINE MFG CO$83.8M3.14%313,683Trimmed
5QLYSQUALYS INC$72.8M2.73%529,807Added
6FOURSHIFT4 PMTS INC$54.2M2.03%1.1MAdded
7MECMAYVILLE ENGR CO INC$48.7M1.82%1.3MAdded
8ENVAENOVA INTL INC$47.9M1.79%198,795Added
9SMTCSEMTECH CORP$47.7M1.79%294,619Trimmed
10CLSCELESTICA INC$46.3M1.73%126,856Trimmed
11UTHRUNITED THERAPEUTICS CORP DEL$44.2M1.65%81,518Added
12GENIGENIUS SPORTS LIMITED$42.6M1.59%7.0MAdded
13POWLPOWELL INDS INC$41.7M1.56%145,631Added
14PENGPENGUIN SOLUTIONS INC$41.5M1.55%546,173New
15DAVEDAVE INC$39.2M1.47%105,338Trimmed
16FLEXFLEX LTD$37.1M1.39%229,027Trimmed
17ALNTALLIENT INC$37.0M1.39%359,685Added
18PRCHPORCH GROUP INC$36.9M1.38%2.5MAdded
19AKAMAKAMAI TECHNOLOGIES INC$36.7M1.37%310,361Trimmed
20CADLCANDEL THERAPEUTICS INC$36.0M1.35%3.5MAdded
21TLNTALEN ENERGY CORP$34.7M1.30%90,312Added
22RRXREGAL REXNORD CORPORATION$32.8M1.23%137,498Added
23LNTHLANTHEUS HLDGS INC$32.0M1.20%288,691Trimmed
24BIIBBIOGEN INC$30.9M1.16%142,856Added
25VECOVEECO INSTRS INC DEL$30.4M1.14%401,639Added

Source: SEC Form 13F filings · as of 2026-06-30