Portolan Capital Management, LLC reported 143 positions worth $2.64B for the quarter ended Jun 30, 2026, up 46.4% on the prior quarter. It opened 36 new positions, added to 49, trimmed 54 and exited 31. Its largest holding is Vishay Precision Group, Inc. at 5.7% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| VIRT Virtu Financial, Inc. | +930.3K | +76.8% | $55.42M | 4.83% |
| FOUR Shift4 Payments, Inc. | +899.8K | +419.9% | $43.77M | 2.05% |
| PENG Penguin Solutions, Inc. | +546.2K | – | $41.51M | 1.57% |
| QLYS Qualys, Inc. | +290.8K | +121.7% | $39.98M | 2.76% |
| ENVA Enova International, Inc. | +117.9K | +145.7% | $28.38M | 1.81% |
| SRAD Sportradar Group AG | +1.82M | – | $27.24M | 1.03% |
| BAND Bandwidth Inc. | +412.7K | – | $26.12M | 0.988% |
| GENI Genius Sports Ltd | +4.23M | +151.7% | $25.66M | 1.61% |
| KTB Kontoor Brands, Inc. | +292.1K | – | $24.34M | 0.921% |
| ECPG Encore Capital Group Inc | +255.7K | – | $23.86M | 0.902% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| TTMI Ttm Technologies Inc | -219.7K | -30.2% | $41.08M | 3.59% |
| PBF PBF Energy Inc. | -800.0K | -100.0% | $38.10M | Exited |
| CRGY Crescent Energy Co | -2.60M | -100.0% | $35.12M | Exited |
| FLEX Flex Ltd. | -214.1K | -48.3% | $34.70M | 1.4% |
| BIDU Baidu, Inc. | -270.6K | -73.8% | $30.92M | 0.414% |
| FN Fabrinet | -48.3K | -88.3% | $27.17M | 0.136% |
| MOD Modine Manufacturing Co | -98.4K | -23.9% | $26.28M | 3.17% |
| CLS Celestica Inc | -71.0K | -35.9% | $25.90M | 1.75% |
| CNR Core Natural Resources, Inc. | -237.0K | -100.0% | $24.82M | Exited |
| CSTL Castle Biosciences Inc | -1.02M | -75.6% | $24.36M | 0.297% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| PENG Penguin Solutions, Inc. | +546.2K | $41.51M | 1.57% |
| SRAD Sportradar Group AG | +1.82M | $27.24M | 1.03% |
| BAND Bandwidth Inc. | +412.7K | $26.12M | 0.988% |
| KTB Kontoor Brands, Inc. | +292.1K | $24.34M | 0.921% |
| ECPG Encore Capital Group Inc | +255.7K | $23.86M | 0.902% |
| BB BLACKBERRY Ltd | +1.71M | $21.69M | 0.82% |
| IFF International Flavors & Fragrances Inc | +269.2K | $21.33M | 0.807% |
| VSH Vishay Intertechnology Inc | +351.5K | $18.90M | 0.715% |
| GTES Gates Industrial Corp Ltd. | +641.6K | $17.95M | 0.679% |
| COHU Cohu Inc | +206.1K | $15.23M | 0.576% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| PBF PBF Energy Inc. | -800.0K | $38.10M | 2.11% |
| CRGY Crescent Energy Co | -2.60M | $35.12M | 1.94% |
| CNR Core Natural Resources, Inc. | -237.0K | $24.82M | 1.37% |
| MUSA Murphy USA Inc. | -48.1K | $23.76M | 1.32% |
| CRCL Circle Internet Group, Inc. | -213.8K | $20.40M | 1.13% |
| PRIM Primoris Services Corp | -130.6K | $18.68M | 1.03% |
| UPWK Upwork, Inc | -1.57M | $17.21M | 0.953% |
| RPAY Repay Holdings Corp | -2.86M | $7.43M | 0.411% |
| ACLS Axcelis Technologies Inc | -77.2K | $7.18M | 0.398% |
| VNET VNET Group, Inc. | -825.5K | $6.93M | 0.383% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | VPG Vishay Precision Group, Inc. | Industrials | 1.01M | $151.13M | 5.72% | -11.7K | -1.1% | Reduced | 7.58% |
| 2 | VIRT Virtu Financial, Inc. | Financial Services | 2.14M | $127.61M | 4.83% | +930.3K | +76.8% | Added | 1.38% |
| 3 | TTMI Ttm Technologies Inc | Technology | 507.8K | $94.98M | 3.59% | -219.7K | -30.2% | Reduced | 0.48% |
| 4 | MOD Modine Manufacturing Co | Industrials | 313.7K | $83.76M | 3.17% | -98.4K | -23.9% | Reduced | 0.59% |
| 5 | QLYS Qualys, Inc. | Technology | 529.8K | $72.84M | 2.76% | +290.8K | +121.7% | Added | 1.51% |
| 6 | FOUR Shift4 Payments, Inc. | Technology | 1.11M | $54.19M | 2.05% | +899.8K | +419.9% | Added | 1.41% |
| 7 | MEC Mayville Engineering Company, Inc. | Industrials | 1.30M | $48.67M | 1.84% | +478.1K | +58.2% | Added | 5.1% |
| 8 | ENVA Enova International, Inc. | Financial Services | 198.8K | $47.86M | 1.81% | +117.9K | +145.7% | Added | 0.8% |
| 9 | SMTC Semtech Corp | Technology | 294.6K | $47.68M | 1.8% | -37.7K | -11.3% | Reduced | 0.32% |
| 10 | CLS Celestica Inc | Technology | 126.9K | $46.28M | 1.75% | -71.0K | -35.9% | Reduced | 0.11% |
| 11 | UTHR UNITED THERAPEUTICS Corp | Healthcare | 81.5K | $44.17M | 1.67% | +18.1K | +28.5% | Added | 0.19% |
| 12 | GENI Genius Sports Ltd | Technology | 7.03M | $42.58M | 1.61% | +4.23M | +151.7% | Added | 2.76% |
| 13 | POWL Powell Industries Inc | Industrials | 145.6K | $41.70M | 1.58% | -81.9K | -36.0% | Reduced | 0.4% |
| 14 | PENG Penguin Solutions, Inc. | Technology | 546.2K | $41.51M | 1.57% | +546.2K | – | New | 1.07% |
| 15 | DAVE Dave Inc. | Technology | 105.3K | $39.25M | 1.48% | -104 | -0.1% | Reduced | 0.92% |
Tip. Select a row to see that position’s full history at Portolan Capital Management.
As of its Q2 2026 13F filing, Portolan Capital Management, LLC’s five largest positions were Vishay Precision Group, Inc. (VPG) at 5.7%, Virtu Financial, Inc. (VIRT) at 4.8%, Ttm Technologies Inc (TTMI) at 3.6%, Modine Manufacturing Co (MOD) at 3.2%, Qualys, Inc. (QLYS) at 2.8% of the reported portfolio.
Portolan Capital Management, LLC reported a 13F portfolio worth $2.64B across 143 positions for Q2 2026. That is up 46.4% from the previous quarter.
Its largest purchases by value were Virtu Financial, Inc. ($55.42M), Shift4 Payments, Inc. ($43.77M), Penguin Solutions, Inc. ($41.51M). It opened 36 new positions.
Its largest sales by value were Ttm Technologies Inc ($41.08M), PBF Energy Inc. ($38.10M), Crescent Energy Co ($35.12M). It exited 31 positions entirely.
From the Form 13F-HR reports Portolan Capital Management, LLC files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.