Portolan Capital Management, LLC

In its 13F for Q2 2026 (holdings as of June 30, 2026, filed August 14, 2026), Portolan Capital Management, LLC reported 148 stock positions worth $2.7 billion. Its top holding was Vishay Precision (VPG) at 5.7% of the portfolio, followed by Virtu Financial Class A (VIRT, 4.8%) and TTM Technologies (TTMI, 3.6%). Compared with Q1 2026, it opened 36 new positions, sold out of 32, added to 49 and reduced 59. The biggest buy was Virtu Financial Class A (VIRT, shares +77%) and the biggest sale an exit from PBF Energy Class A (PBF).

Most Recent 13F
Q2 2026
Location
BOSTON, MA
CIK
0001350290
Portfolio Value
$2.7B (Q2 2026)
SEC Filing
0001104659-26-096980 ↗ filed Aug 14, 2026

Holdings Value

0$1.0B$2.0B$3.0B Q1 2024: $1.3B Q1 2024 Q2 2024: $1.2B Q2 2024 Q3 2024: $1.4B Q3 2024 Q4 2024: $1.5B Q4 2024 Q1 2025: $1.3B Q1 2025 Q2 2025: $1.6B Q2 2025 Q3 2025: $1.8B Q3 2025 Q4 2025: $1.9B Q4 2025 Q1 2026: $1.9B Q1 2026 Q2 2026: $2.7B $2.7B Q2 2026

Holdings 148 stocks · $2.7B
VPG Vishay Precision Group 5.66% 1,008,167 $151.1M Reduce -1.1%
VIRT Virtu Financial Inc. Class A 4.78% 2,142,215 $127.6M Add +76.8%
TTMI TTM Technologies 3.56% 507,838 $95.0M Reduce -30.2%
MOD Modine Manufacturing Co. 3.14% 313,683 $83.8M Reduce -23.9%
QLYS Qualys Inc. 2.73% 529,807 $72.8M Add +121.7%
FOUR SHIFT4 Payments Inc. Class A 2.03% 1,114,116 $54.2M Add +419.9%
MEC Mayville Engineering Co. Inc. 1.82% 1,299,256 $48.7M Add +58.2%
ENVA Enova International Inc. 1.79% 198,795 $47.9M Add +145.7%
SMTC Semtech Corp. 1.79% 294,619 $47.7M Reduce -11.3%
CLS Celestica Inc. 1.73% 126,856 $46.3M Reduce -35.9%
UTHR United Therapeutics Corp. 1.65% 81,518 $44.2M Add +28.5%
GENI Genius Sports Ltd. 1.59% 7,025,809 $42.6M Add +151.7%
POWL Powell Industries Inc. 1.56% 145,631 $41.7M Reduce -36.0%
PENG Penguin Solutions Inc. 1.55% 546,173 $41.5M New
DAVE Dave Inc. 1.47% 105,338 $39.2M Reduce -0.1%
FLEX Flex Ltd. 1.39% 229,027 $37.1M Reduce -48.3%
ALNT Allient Inc. 1.39% 359,685 $37.0M Add +11.2%
PRCH Porch Group Inc. 1.38% 2,456,451 $36.9M Add +14.5%
AKAM Akamai Technologies Inc. 1.37% 310,361 $36.7M Reduce -26.7%
CADL Candel Therapeutics Inc. 1.35% 3,490,398 $36.0M Add +20.6%
TLN Talen Energy Corp. 1.30% 90,312 $34.7M Add +10.7%
RRX Regal Rexnord Corp. 1.23% 137,498 $32.8M Add +154.7%
LNTH Lantheus Holdings Inc. 1.20% 288,691 $32.0M Reduce -30.8%
BIIB Biogen Inc. 1.16% 142,856 $30.9M Add +20.6%
VECO Veeco Instruments Inc. 1.14% 401,639 $30.4M Add +58.5%
LUXE Luxexperience BV 1.13% 4,053,147 $30.1M Add +8.6%
ZETA Zeta Global Holdings Corp. Class A 1.11% 1,502,738 $29.6M Add +209.0%
CLBT Cellebrite Di Ltd. 1.06% 1,932,514 $28.2M Reduce -11.4%
SRAD Sportradar Group AG-A 1.02% 1,819,949 $27.2M New
GOOS Canada Goose Holdings Inc. 0.98% 2,750,523 $26.2M Reduce -14.5%
BAND Bandwidth Inc. Class A 0.98% 412,701 $26.1M New
WRBY Warby Parker Inc. Class A 0.96% 843,862 $25.6M Add +68.5%
KTB Kontoor Brands Inc. 0.91% 292,115 $24.3M New
OSK Oshkosh Corp. 0.91% 157,641 $24.2M Add +766.9%
ECPG Encore Capital Group Inc. 0.89% 255,715 $23.9M New
TWLO Twilio Inc. Class A 0.89% 115,397 $23.8M Add +54.3%
SEZL Sezzle Inc. 0.87% 135,743 $23.3M Add +93.8%
RELY Remitly Global Inc. 0.85% 1,017,592 $22.8M Add +45.8%
ACMR Acm Research Inc. Class A 0.84% 177,432 $22.5M Add +113.1%
ESI Element Solutions Inc. 0.84% 469,213 $22.4M Add +112.1%
NOK Nokia Corp.-Spon ADR 0.82% 1,645,761 $21.9M Reduce -31.3%
BB Blackberry Ltd. 0.81% 1,714,461 $21.7M New
IFF Intl Flavors & Fragrances filed as INTERNATIONAL FLAVORS&FRAGRA 0.80% 269,229 $21.3M New
PLSE Pulse Biosciences Inc. 0.78% 753,333 $20.9M Add +2.7%
MOG.A Moog Inc. Class A 0.78% 49,274 $20.9M Add +67.4%
REAL BROKERAGE INC/THE filed as THE REAL BROKERAGE INC 0.75% 11,042,364 $20.1M Reduce -23.9%
CDNA Caredx Inc. 0.73% 684,805 $19.5M Add +101.2%
PARR Par Pacific Holdings Inc. 0.72% 341,863 $19.2M Reduce -50.7%
VSH Vishay Intertechnology Inc. 0.71% 351,515 $18.9M New
TTWO Take-Two Interactive Softwre 0.68% 72,487 $18.1M Add +125.0%
GTES Gates Industrial Corp. UK Ltd. 0.67% 641,587 $17.9M New
MAMA Mama's Creations Inc. 0.66% 984,869 $17.6M Reduce -16.3%
KRUS Kura Sushi USA Inc. Class A 0.65% 302,010 $17.4M Add +0.3%
SANM Sanmina Corp. 0.65% 68,255 $17.3M Add +149.7%
PKE Park Aerospace Corp. 0.64% 447,390 $17.1M Add +8.9%
GHM Graham Corp. 0.63% 136,925 $16.9M Add +32.2%
BELFB Bel Fuse Inc. Class B 0.60% 47,856 $15.9M Reduce -10.0%
ONON On Holding AG Class A filed as ON HLDG AG 0.58% 441,137 $15.6M Add +117.9%
AS Amer Sports Inc. 0.57% 452,880 $15.3M Add +26.6%
COHU Cohu Inc. 0.57% 206,120 $15.2M New
JBL Jabil Inc. 0.56% 38,929 $15.0M Reduce -49.6%
ADEA Adeia Inc. 0.55% 443,060 $14.6M Reduce -39.3%
VICR Vicor Corp. 0.54% 38,081 $14.5M Add +42.8%
TENB Tenable Holdings Inc. 0.54% 387,923 $14.3M New
GEHC GE Healthcare Technology 0.53% 222,393 $14.2M New
CXT Crane NXT Co. 0.52% 271,524 $13.9M New
PACK Ranpak Holdings Corp. 0.52% 1,894,855 $13.9M Reduce -2.7%
ONTO Onto Innovation Inc. 0.52% 36,503 $13.8M Add +64.0%
WGS Genedx Holdings Corp. 0.51% 200,315 $13.8M Add +95.3%
FORR Forrester Research Inc. 0.51% 1,623,925 $13.7M Add +5.4%
HZO Marinemax Inc. 0.47% 344,358 $12.6M New
BIO Bio-Rad Laboratories-A 0.47% 42,620 $12.5M Add +200.7%
QMCO Quantum Corp. 0.42% 1,020,120 $11.2M New
BIDU Baidu Inc. - Spon ADR 0.41% 95,863 $11.0M Reduce -73.8%
RACE Ferrari NV 0.41% 29,079 $10.8M New
DGII Digi International Inc. 0.40% 141,243 $10.6M Reduce -17.0%
LASR Nlight Inc. 0.40% 151,867 $10.6M Reduce -32.7%
VIAV Viavi Solutions Inc. 0.39% 220,118 $10.5M Add +50.9%
BOOT Boot Barn Holdings Inc. 0.39% 63,759 $10.5M New
LPTH Lightpath Technologies Inc. Class A 0.39% 629,168 $10.3M Reduce -39.5%
FEIM Frequency Electronics Inc. 0.38% 152,818 $10.1M Add +1.8%
HALO Halozyme Therapeutics Inc. 0.37% 127,498 $10.0M New
ECO Okeanis Eco Tankers Corp. 0.37% 195,997 $9.8M Reduce -63.6%
ZGN Ermenegildo Zegna NV 0.37% 753,948 $9.8M Add +6.1%
SG Sweetgreen Inc. Class A 0.34% 1,029,016 $9.1M New
TPR Tapestry Inc. 0.34% 61,688 $9.0M Add +262.1%
SEI Solaris Energy Infrastructur 0.32% 107,401 $8.6M Add +284.5%
ATEN A10 Networks Inc. 0.32% 226,920 $8.5M New
AMBA Ambarella Inc. 0.31% 97,072 $8.3M Reduce -10.7%
TGLS Tecnoglass Holdings Inc. 0.31% 176,254 $8.3M New
QTRX Quanterix Corp. 0.31% 1,899,308 $8.2M Reduce -35.5%
TGEN Tecogen Inc./Waltham Ma 0.30% 1,551,113 $8.1M Add +249.7%
HQY Healthequity Inc. 0.30% 89,274 $8.1M Reduce -12.2%
TSEM Tower Semiconductor Ltd. 0.30% 30,557 $8.0M Reduce -4.6%
CSTL Castle Biosciences Inc. 0.29% 328,818 $7.8M Reduce -75.7%
SILC Silicom Ltd. 0.29% 162,466 $7.8M New
CIEN Ciena Corp. 0.28% 15,272 $7.5M Reduce -17.3%
EBAY eBay Inc. 0.28% 65,741 $7.3M Reduce -47.9%
RBA RB Global Inc. 0.27% 63,009 $7.3M New
XMTR Xometry Inc. Class A 0.26% 73,163 $7.1M New
MBLY Mobileye Global Inc. Class A 0.26% 721,338 $7.0M Add +6.4%
WLDN Willdan Group Inc. 0.25% 84,394 $6.7M Reduce -10.2%
HNST The Honest Co. Inc. 0.24% 1,740,146 $6.4M Reduce -42.9%
MTRN Materion Corp. 0.23% 20,860 $6.2M New
TTAM Titan America SA 0.22% 320,509 $6.0M New
GLBE Global-E Online Ltd. 0.22% 171,521 $6.0M New
META Meta Platforms Inc. Class A 0.21% 10,155 $5.7M Reduce -1.0%
CELH Celsius Holdings Inc. 0.21% 194,851 $5.7M Add +18.4%
REAL The Realreal Inc. filed as THE REALREAL INC 0.21% 478,194 $5.6M New
ELF Elf Beauty Inc. 0.21% 75,954 $5.6M Reduce -44.4%
TMDX Transmedics Group Inc. 0.20% 82,354 $5.5M Add +670.5%
RDVT Red Violet Inc. 0.20% 84,135 $5.4M New
DHT DHT Holdings Inc. 0.19% 314,928 $5.2M Reduce -71.2%
EVLV Evolv Technologies Holdings 0.19% 894,478 $5.2M Reduce -50.2%
PRCT Procept Biorobotics Corp. 0.19% 227,010 $5.1M Reduce -9.8%
TKR Timken Co. 0.19% 34,861 $5.1M New
LITE Lumentum Holdings Inc. 0.19% 5,822 $5.0M No change
GNRC Generac Holdings Inc. 0.18% 16,852 $4.9M New
BC Brunswick Corp. 0.18% 57,175 $4.8M New
EQPT Equipmentshare.com Inc. Class A 0.17% 231,126 $4.5M New
CGNT Cognyte Software Ltd. 0.16% 500,140 $4.4M New
NOVT Novanta Inc. 0.16% 26,972 $4.4M Reduce -28.1%
DOUG Douglas Elliman Inc. 0.16% 2,399,364 $4.2M Reduce -10.1%
BOBS Bob's Discount Furniture 0.15% 249,906 $4.0M New
ECG Everus Construction Group 0.15% 23,568 $3.9M Add +170.1%
MEI Methode Electronics Inc. 0.14% 200,000 $3.8M New
FN Fabrinet 0.14% 6,418 $3.6M Reduce -88.3%
UCTT Ultra Clean Holdings Inc. 0.13% 24,831 $3.5M Reduce -26.3%
KTOS Kratos Defense & Security 0.12% 65,221 $3.3M Reduce -74.9%
NXT Nextpower Inc. 0.12% 27,101 $3.2M Reduce -52.2%
HAFN Hafnia Ltd. 0.09% 367,195 $2.4M Reduce -81.2%
NTRA Natera Inc. 0.09% 8,532 $2.3M Reduce -25.3%
GH Guardant Health Inc. 0.08% 13,897 $2.1M Reduce -1.8%
GCT Gigacloud Technology Inc. Class A 0.08% 65,644 $2.1M Add +26.2%
GOOG Alphabet Inc. Class C 0.08% 5,710 $2.0M No change
AAOI Applied Optoelectronics Inc. 0.07% 11,966 $1.8M Reduce -59.9%
IESC Ies Holdings Inc. 0.05% 1,940 $1.4M Reduce -83.7%
CWST Casella Waste Systems Inc. Class A 0.05% 14,690 $1.4M Reduce -2.7%
PL Planet Labs PBC 0.05% 36,869 $1.2M Reduce -22.0%
AMSC American Superconductor Corp. 0.05% 29,314 $1.2M Reduce -90.1%
DAN Dana Inc. 0.03% 33,121 $901K Reduce -3.3%
DBRG Digitalbridge Group Inc. 0.03% 56,763 $896K Reduce -84.8%
LINC Lincoln Educational Services 0.03% 14,007 $699K No change
LHX L3HARRIS Technologies Inc. 0.02% 2,157 $627K No change
LPRO Open Lending Corp. 0.02% 182,803 $569K Reduce -97.3%
TLX Telix Pharmaceuticals Ltd. 0.01% 25,424 $293K Reduce -95.3%
GDS GDS Holdings Ltd. - ADR filed as GDS HLDGS LTD 0.01% 9,120 $274K Reduce -40.3%
TALO Talos Energy Inc. 0.01% 13,300 $172K Reduce -96.1%

Portfolio Sells Q1 2026 → Q2 2026
PBF PBF Energy Inc. Class A Sold out 0.00% −2.03
CRGY Crescent Energy Inc. Class A Sold out 0.00% −1.87
BIDU Baidu Inc. - Spon ADR Reduce -73.8% 0.41% −1.76
MOD Modine Manufacturing Co. Reduce -23.9% 3.14% −1.62
PARR Par Pacific Holdings Inc. Reduce -50.7% 0.72% −1.60
CSTL Castle Biosciences Inc. Reduce -75.7% 0.29% −1.47
FN Fabrinet Reduce -88.3% 0.14% −1.38
CNR Core Natural Resources Inc. Sold out 0.00% −1.32
MUSA Murphy USA Inc. Sold out 0.00% −1.26
CLS Celestica Inc. Reduce -35.9% 1.73% −1.23
AKAM Akamai Technologies Inc. Reduce -26.7% 1.37% −1.21
REAL BROKERAGE INC/THE Reduce -23.9% 0.75% −1.18
CRCL Circle Internet Group Inc. Sold out 0.00% −1.09
ECO Okeanis Eco Tankers Corp. Reduce -63.6% 0.37% −1.08
PRIM Primoris Services Corp. Sold out 0.00% −0.99
UPWK Upwork Inc. Sold out 0.00% −0.92
GOOS Canada Goose Holdings Inc. Reduce -14.5% 0.98% −0.90
DHT DHT Holdings Inc. Reduce -71.2% 0.19% −0.87
KTOS Kratos Defense & Security Reduce -74.9% 0.12% −0.85
HAFN Hafnia Ltd. Reduce -81.2% 0.09% −0.70
POWL Powell Industries Inc. Reduce -36.0% 1.56% −0.62
CLBT Cellebrite Di Ltd. Reduce -11.4% 1.06% −0.54
JBL Jabil Inc. Reduce -49.6% 0.56% −0.53
AMSC American Superconductor Corp. Reduce -90.1% 0.05% −0.49
LNTH Lantheus Holdings Inc. Reduce -30.8% 1.20% −0.49
LPRO Open Lending Corp. Reduce -97.3% 0.02% −0.44
RPAY Repay Holdings Corp. Sold out 0.00% −0.40
ADEA Adeia Inc. Reduce -39.3% 0.55% −0.39
EVLV Evolv Technologies Holdings Reduce -50.2% 0.19% −0.38
ACLS Axcelis Technologies Inc. Sold out 0.00% −0.38
VNET Vnet Group Inc.-ADR Sold out 0.00% −0.37
EBAY eBay Inc. Reduce -47.9% 0.28% −0.34
NOG Northern Oil and Gas Inc. Sold out 0.00% −0.32
BL Blackline Inc. Sold out 0.00% −0.31
MAMA Mama's Creations Inc. Reduce -16.3% 0.66% −0.30
CENX Century Aluminum Company Sold out 0.00% −0.30
LASR Nlight Inc. Reduce -32.7% 0.40% −0.29
TALO Talos Energy Inc. Reduce -96.1% 0.01% −0.28
DBRG Digitalbridge Group Inc. Reduce -84.8% 0.03% −0.27
MIAX Miami International Holdings Sold out 0.00% −0.27
TLX Telix Pharmaceuticals Ltd. Reduce -95.3% 0.01% −0.26
AVAV Aerovironment Inc. Sold out 0.00% −0.26
XPEV Xpeng Inc. - ADR Sold out 0.00% −0.25
PSNL Personalis Inc. Sold out 0.00% −0.25
IESC Ies Holdings Inc. Reduce -83.7% 0.05% −0.25
IIIV I3 Verticals Inc. Class A Sold out 0.00% −0.25
QTRX Quanterix Corp. Reduce -35.5% 0.31% −0.24
NXT Nextpower Inc. Reduce -52.2% 0.12% −0.24
PUMP Propetro Holding Corp. Sold out 0.00% −0.24
HNST The Honest Co. Inc. Reduce -42.9% 0.24% −0.24

Portfolio Buys Q1 2026 → Q2 2026
VIRT Virtu Financial Inc. Class A Add +76.8% 4.78% +1.94
QLYS Qualys Inc. Add +121.7% 2.73% +1.61
PENG Penguin Solutions Inc. New 1.55% +1.55
FOUR SHIFT4 Payments Inc. Class A Add +419.9% 2.03% +1.53
ENVA Enova International Inc. Add +145.7% 1.79% +1.21
MEC Mayville Engineering Co. Inc. Add +58.2% 1.82% +1.04
SRAD Sportradar Group AG-A New 1.02% +1.02
BAND Bandwidth Inc. Class A New 0.98% +0.98
GENI Genius Sports Ltd. Add +151.7% 1.59% +0.94
KTB Kontoor Brands Inc. New 0.91% +0.91
ECPG Encore Capital Group Inc. New 0.89% +0.89
BB Blackberry Ltd. New 0.81% +0.81
IFF Intl Flavors & Fragrances New 0.80% +0.80
OSK Oshkosh Corp. Add +766.9% 0.91% +0.76
VSH Vishay Intertechnology Inc. New 0.71% +0.71
ZETA Zeta Global Holdings Corp. Class A Add +209.0% 1.11% +0.70
RRX Regal Rexnord Corp. Add +154.7% 1.23% +0.69
VECO Veeco Instruments Inc. Add +58.5% 1.14% +0.68
GTES Gates Industrial Corp. UK Ltd. New 0.67% +0.67
ACMR Acm Research Inc. Class A Add +113.1% 0.84% +0.67
SEZL Sezzle Inc. Add +93.8% 0.87% +0.64
CADL Candel Therapeutics Inc. Add +20.6% 1.35% +0.59
COHU Cohu Inc. New 0.57% +0.57
PRCH Porch Group Inc. Add +14.5% 1.38% +0.56
TENB Tenable Holdings Inc. New 0.54% +0.54
GEHC GE Healthcare Technology New 0.53% +0.53
CXT Crane NXT Co. New 0.52% +0.52
HZO Marinemax Inc. New 0.47% +0.47
SANM Sanmina Corp. Add +149.7% 0.65% +0.46
ESI Element Solutions Inc. Add +112.1% 0.84% +0.44
QMCO Quantum Corp. New 0.42% +0.42
CDNA Caredx Inc. Add +101.2% 0.73% +0.42
RACE Ferrari NV New 0.41% +0.41
WRBY Warby Parker Inc. Class A Add +68.5% 0.96% +0.40
BOOT Boot Barn Holdings Inc. New 0.39% +0.39
TWLO Twilio Inc. Class A Add +54.3% 0.89% +0.39
HALO Halozyme Therapeutics Inc. New 0.37% +0.37
ALNT Allient Inc. Add +11.2% 1.39% +0.37
TTWO Take-Two Interactive Softwre Add +125.0% 0.68% +0.34
SG Sweetgreen Inc. Class A New 0.34% +0.34
MOG.A Moog Inc. Class A Add +67.4% 0.78% +0.32
ATEN A10 Networks Inc. New 0.32% +0.32
VICR Vicor Corp. Add +42.8% 0.54% +0.31
TGLS Tecnoglass Holdings Inc. New 0.31% +0.31
SILC Silicom Ltd. New 0.29% +0.29
RBA RB Global Inc. New 0.27% +0.27
ONTO Onto Innovation Inc. Add +64.0% 0.52% +0.27
RELY Remitly Global Inc. Add +45.8% 0.85% +0.27
XMTR Xometry Inc. Class A New 0.26% +0.26
BIO Bio-Rad Laboratories-A Add +200.7% 0.47% +0.26

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 148$2.7BVPG, VIRT, TTMI, MOD, QLYS
Q1 2026 144$1.9BMOD, TTMI, CLS, VIRT, AKAM
Q4 2025 155$1.9BTTMI, MOD, CSTL, CLS, AKAM
Q3 2025 119$1.8BMOD, TTMI, ELF, DBRG, CLS
Q2 2025 118$1.6BCLS, KTOS, ELF, AVAV, MOD
Q1 2025 109$1.3BLNTH, SLM, KTOS, GENI, MOD
Q4 2024 131$1.5BLNTH, CLS, SMTC, MOD, HNST
Q3 2024 129$1.4BLNTH, ZETA, KTOS, TLN, CLS
Q2 2024 117$1.2BLNTH, CLS, SMCI, ZETA, KTOS
Q1 2024 116$1.3BSMCI, CLS, LNTH, ELF, BIO