Portolan Capital Management, LLC

In its 13F for Q4 2024 (holdings as of December 31, 2024, filed February 13, 2025), Portolan Capital Management, LLC reported 131 stock positions worth $1.5 billion. Its top holding was Lantheus (LNTH) at 4.9% of the portfolio, followed by Celestica (CLS, 3.9%) and Semtech (SMTC, 2.8%). Compared with Q3 2024, it opened 38 new positions, sold out of 36, added to 47 and reduced 46. The biggest buy was Semtech (SMTC, shares +610%) and the biggest sale Zeta Global Class A (ZETA, shares −53%).

Most Recent 13F
Q2 2026
Location
BOSTON, MA
CIK
0001350290
Portfolio Value
$1.5B (Q4 2024)
SEC Filing
0001104659-25-012988 ↗ filed Feb 13, 2025

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 $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 Q2 2026

Holdings 131 stocks · $1.5B
LNTH Lantheus Holdings Inc. 4.89% 812,630 $72.7M Add +21.1%
CLS Celestica Inc. 3.89% 626,941 $57.9M Reduce -14.2%
SMTC Semtech Corp. 2.78% 667,211 $41.3M Add +609.5%
MOD Modine Manufacturing Co. 2.56% 328,899 $38.1M Add +57.5%
HNST The Honest Co. Inc. 2.50% 5,359,001 $37.1M Reduce -30.1%
KTOS Kratos Defense & Security 2.39% 1,348,077 $35.6M Reduce -24.1%
KRUS Kura Sushi USA Inc. Class A 2.27% 373,253 $33.8M Add +72.4%
TTMI TTM Technologies 2.17% 1,301,342 $32.2M Add +22.6%
TLN Talen Energy Corp. 2.09% 154,381 $31.1M Reduce -30.2%
RDNT Radnet Inc. 1.99% 424,340 $29.6M Reduce -13.6%
ELF Elf Beauty Inc. 1.94% 229,998 $28.9M Add +92.8%
QTRX Quanterix Corp. 1.85% 2,587,824 $27.5M Add +2.7%
GENI Genius Sports Ltd. 1.79% 3,069,558 $26.6M Reduce -3.2%
SNAP Snap Inc. Class A 1.71% 2,362,784 $25.4M New
SLM SLM Corp. 1.67% 900,519 $24.8M Add +128.3%
GTES Gates Industrial Corp. UK Ltd. 1.55% 1,117,238 $23.0M New
PAYO Payoneer Global Inc. 1.47% 2,173,559 $21.8M Add +103.7%
RDDT Reddit Inc. Class A 1.45% 131,622 $21.5M Add +195.5%
QNST Quinstreet Inc. 1.42% 917,215 $21.2M Add +14.4%
CSTL Castle Biosciences Inc. 1.39% 776,579 $20.7M Reduce -38.1%
CLBT Cellebrite Di Ltd. 1.36% 914,856 $20.2M Reduce -25.3%
ENVA Enova International Inc. 1.34% 208,351 $20.0M Add +76.5%
GCO Genesco Inc. 1.33% 464,265 $19.8M New
VIRT Virtu Financial Inc. Class A 1.27% 528,607 $18.9M Add +35.1%
BELFB Bel Fuse Inc. Class B 1.16% 208,470 $17.2M Add +72.5%
FLEX Flex Ltd. 1.12% 435,302 $16.7M Reduce -1.3%
RELY Remitly Global Inc. 1.05% 694,242 $15.7M Add +96.6%
IIIV I3 Verticals Inc. Class A 1.05% 676,135 $15.6M Add +3.5%
KMPR Kemper Corp. 1.03% 230,197 $15.3M Reduce -26.5%
EBAY eBay Inc. 0.99% 238,132 $14.8M Add +210.2%
FOUR SHIFT4 Payments Inc. Class A 0.98% 140,971 $14.6M Add +4.7%
CORZ Core Scientific Inc. 0.97% 1,025,508 $14.4M Add +85.8%
LUCK Lucky Strike Entertainment C 0.96% 1,429,257 $14.3M Add +102.6%
OPRA Opera Ltd.-ADR 0.95% 748,349 $14.2M Add +5.1%
LUXE Luxexperience BV filed as MYT NETHERLANDS PARENT B V 0.91% 1,903,285 $13.5M Add +5.4%
SKX Skechers USA Inc. Class A 0.90% 198,827 $13.4M Add +29.1%
TPR Tapestry Inc. 0.87% 197,900 $12.9M New
ORCL Oracle Corp. 0.87% 77,215 $12.9M Add +97.9%
STKL Sunopta Inc. 0.86% 1,667,498 $12.8M Add +32.8%
AAOI Applied Optoelectronics Inc. 0.84% 336,907 $12.4M Reduce -48.8%
SRAD Sportradar Group AG-A 0.83% 715,424 $12.4M Reduce -28.2%
ZETA Zeta Global Holdings Corp. Class A 0.80% 664,363 $12.0M Reduce -52.7%
DKNG Draftkings Inc. Class A 0.80% 320,583 $11.9M Add +294.0%
VPG Vishay Precision Group 0.78% 492,201 $11.6M New
PRCH Porch Group Inc. 0.76% 2,299,635 $11.3M Add +476.0%
GNRC Generac Holdings Inc. 0.74% 71,342 $11.1M Add +61.3%
WRBY Warby Parker Inc. Class A 0.72% 441,784 $10.7M Add +89.3%
ECPG Encore Capital Group Inc. 0.69% 215,423 $10.3M New
PSIX Power Solutions Internationa 0.68% 341,287 $10.2M New
DELL Dell Technologies -C 0.68% 87,822 $10.1M Add +366.8%
BIO Bio-Rad Laboratories-A 0.68% 30,586 $10.0M Add +39.7%
SG Sweetgreen Inc. Class A 0.66% 307,001 $9.8M Reduce -44.7%
UBS UBS Group AG-Reg 0.66% 321,566 $9.7M New
ACI Albertsons Cos Inc. Class A 0.65% 489,980 $9.6M New
MLR Miller Industries Inc. 0.63% 143,304 $9.4M New
PBPB Potbelly Corp. 0.62% 986,277 $9.3M Add +9.3%
VRT Vertiv Holdings Co. Class A 0.62% 80,631 $9.2M Reduce -41.9%
TGLS Tecnoglass Holdings Inc. 0.61% 114,033 $9.0M Reduce -60.8%
ESTA Establishment Labs Holdings 0.60% 193,991 $8.9M Add +243.2%
DBRG Digitalbridge Group Inc. 0.60% 791,932 $8.9M Add +238.1%
CROX Crocs Inc. 0.60% 81,430 $8.9M Reduce -11.3%
RPRX Royalty Pharma PLC Class A 0.59% 344,185 $8.8M Add +101.9%
META Meta Platforms Inc. Class A 0.58% 14,707 $8.6M Reduce -8.0%
BILL Bill Holdings Inc. 0.56% 98,676 $8.4M New
PRIM Primoris Services Corp. 0.55% 107,242 $8.2M Reduce -34.2%
TTWO Take-Two Interactive Softwre 0.53% 42,496 $7.8M Reduce -0.2%
WDC Western Digital Corp. 0.52% 129,245 $7.7M Reduce -4.4%
OSG Octave Specialty Group Inc. filed as AMBAC FINL GROUP INC 0.50% 589,437 $7.5M New
NOG Northern Oil and Gas Inc. 0.49% 197,034 $7.3M Reduce -35.9%
ULTA Ulta Beauty Inc. 0.49% 16,708 $7.3M New
CTOS Custom Truck One Source Inc. 0.47% 1,451,573 $7.0M Add +152.8%
MRX Marex UK Holdings Ltd. filed as MAREX GROUP PLC 0.47% 223,614 $7.0M New
WEAV Weave Communications Inc. 0.46% 433,495 $6.9M New
CADL Candel Therapeutics Inc. 0.44% 753,745 $6.5M New
MAMA Mama's Creations Inc. 0.44% 818,504 $6.5M Reduce -14.2%
LIND Lindblad Expeditions Holding 0.43% 544,273 $6.5M Add +109.9%
SPWH Sportsman's Warehouse Holdin 0.42% 2,334,248 $6.2M Add +146.7%
HZO Marinemax Inc. 0.41% 211,960 $6.1M Reduce -33.7%
NTRA Natera Inc. 0.41% 38,594 $6.1M Reduce -53.9%
STNG Scorpio Tankers Inc. 0.40% 118,557 $5.9M New
MYRG MYR Group Inc./Delaware 0.38% 38,341 $5.7M New
CDMO Avid Bioservices Inc. 0.38% 455,038 $5.6M Reduce -78.3%
ALTG Alta Equipment Group Inc. 0.37% 850,309 $5.6M New
KOS Kosmos Energy Ltd. 0.37% 1,617,506 $5.5M New
NTGR Netgear Inc. 0.36% 192,214 $5.4M New
HCAT Health Catalyst Inc. 0.36% 749,029 $5.3M Add +12.9%
OTLY Oatly Group AB 0.35% 7,915,716 $5.2M Add +66.8%
BV Brightview Holdings Inc. 0.35% 326,674 $5.2M Reduce -47.4%
BASE Couchbase Inc. 0.35% 331,561 $5.2M Reduce -62.1%
VKTX Viking Therapeutics Inc. 0.35% 128,420 $5.2M Add +2.1%
UTHR United Therapeutics Corp. 0.34% 14,249 $5.0M Reduce -53.3%
AMPH Amphastar Pharmaceuticals Inc. 0.33% 131,123 $4.9M Reduce -60.0%
KIDS Orthopediatrics Corp. 0.32% 205,365 $4.8M Reduce -33.3%
MXCT Maxcyte Inc. 0.32% 1,135,613 $4.7M Reduce -12.9%
NVGS Navigator Holdings Ltd. 0.32% 306,769 $4.7M Add +2.1%
GOOS Canada Goose Holdings Inc. 0.30% 439,007 $4.4M New
CACI Caci International Inc. Class A 0.29% 10,701 $4.3M Add +26.3%
DY Dycom Industries Inc. 0.27% 23,248 $4.0M New
SMWB Similarweb Ltd. 0.27% 282,903 $4.0M New
FORR Forrester Research Inc. 0.27% 251,473 $3.9M Add +21.7%
TSEM Tower Semiconductor Ltd. 0.26% 74,707 $3.8M New
INVE Inve Technologies Inc. filed as IDENTIV INC 0.26% 1,046,924 $3.8M Add +3.8%
TPB Turning Point Brands Inc. 0.26% 63,511 $3.8M New
BXC Bluelinx Holdings Inc. 0.24% 35,061 $3.6M Add +764.6%
BLFS Biolife Solutions Inc. 0.24% 137,299 $3.6M Reduce -67.9%
JBL Jabil Inc. 0.23% 24,031 $3.5M New
INDI Indie Semiconductor Inc. Class A 0.23% 845,302 $3.4M Reduce -37.1%
SEZL Sezzle Inc. 0.23% 13,168 $3.4M New
ZGN Ermenegildo Zegna NV 0.23% 405,737 $3.4M New
NBIS Nebius Group NV 0.23% 120,891 $3.3M New
ORN Orion Group Holdings Inc. 0.22% 448,691 $3.3M Reduce -77.4%
TDAY USA Today Co. Inc. filed as GANNETT CO INC 0.19% 570,973 $2.9M New
MSFT Microsoft Corp. 0.19% 6,848 $2.9M Add +23.6%
SMCI Super Micro Computer Inc. 0.19% 93,684 $2.9M New
ML Moneylion Inc. 0.19% 32,915 $2.8M New
APLD Applied Digital Corp. 0.19% 365,398 $2.8M Reduce -45.6%
POWL Powell Industries Inc. 0.19% 12,593 $2.8M New
PGY Pagaya Technologies Ltd. Class A 0.17% 271,776 $2.5M New
BLDP Ballard Power Systems Inc. 0.17% 1,510,772 $2.5M New
MYO Myomo Inc. 0.16% 379,819 $2.4M New
MITK Mitek Systems Inc. 0.15% 194,987 $2.2M Reduce -46.8%
PSN Parsons Corp. 0.14% 23,281 $2.1M Reduce -38.1%
GENK Gen Restaurant Group Inc. 0.14% 283,774 $2.1M Reduce -23.9%
SLQT Selectquote Inc. 0.13% 503,501 $1.9M New
CWST Casella Waste Systems Inc. Class A 0.11% 15,337 $1.6M Reduce -0.4%
GOOG Alphabet Inc. Class C 0.06% 5,067 $965K Reduce -25.0%
RH RH 0.06% 2,077 $817K Reduce -86.6%
SKY Champion Homes Inc. 0.05% 8,996 $793K Reduce -73.5%
EXTR Extreme Networks Inc. 0.04% 32,917 $551K Reduce -96.9%
IESC Ies Holdings Inc. filed as IES HLDGS INC 0.03% 2,186 $439K Reduce -94.5%
DOUG Douglas Elliman Inc. 0.02% 143,000 $239K Reduce -95.1%

Portfolio Sells Q3 2024 → Q4 2024
ZETA Zeta Global Holdings Corp. Class A Reduce -52.7% 0.80% −2.23
PHAT Phathom Pharmaceuticals Inc. Sold out 0.00% −2.23
GDS GDS Holdings Ltd. - ADR Sold out 0.00% −1.93
ACMR Acm Research Inc. Class A Sold out 0.00% −1.36
CDMO Avid Bioservices Inc. Reduce -78.3% 0.38% −1.35
CSTL Castle Biosciences Inc. Reduce -38.1% 1.39% −1.20
EXTR Extreme Networks Inc. Reduce -96.9% 0.04% −1.12
ALGN Align Technology Inc. Sold out 0.00% −1.11
MRVI Maravai Lifesciences Hldgs-A Sold out 0.00% −1.08
COMP Compass Inc. Class A Sold out 0.00% −1.01
BIDU Baidu Inc. - Spon ADR Sold out 0.00% −1.01
GEHC GE Healthcare Technology Sold out 0.00% −0.93
MDU Mdu Resources Group Inc. Sold out 0.00% −0.88
TGLS Tecnoglass Holdings Inc. Reduce -60.8% 0.61% −0.84
AMPH Amphastar Pharmaceuticals Inc. Reduce -60.0% 0.33% −0.83
SG Sweetgreen Inc. Class A Reduce -44.7% 0.66% −0.77
TLN Talen Energy Corp. Reduce -30.2% 2.09% −0.77
NVT Nvent Electric PLC Sold out 0.00% −0.70
LMB Limbach Holdings Inc. Sold out 0.00% −0.68
BASE Couchbase Inc. Reduce -62.1% 0.35% −0.67
ORN Orion Group Holdings Inc. Reduce -77.4% 0.22% −0.61
KTOS Kratos Defense & Security Reduce -24.1% 2.39% −0.61
IESC Ies Holdings Inc. Reduce -94.5% 0.03% −0.54
BLFS Biolife Solutions Inc. Reduce -67.9% 0.24% −0.54
SMCI Super Micro Computer Inc. Sold out 0.00% −0.52
MGPI MGP Ingredients Inc. Sold out 0.00% −0.49
RDNT Radnet Inc. Reduce -13.6% 1.99% −0.48
MTCH Match Group Inc. Sold out 0.00% −0.48
UTHR United Therapeutics Corp. Reduce -53.3% 0.34% −0.45
MTRX Matrix Service Co. Sold out 0.00% −0.43
WEX Wex Inc. Sold out 0.00% −0.41
HZO Marinemax Inc. Reduce -33.7% 0.41% −0.40
VRT Vertiv Holdings Co. Class A Reduce -41.9% 0.62% −0.39
DOUG Douglas Elliman Inc. Reduce -95.1% 0.02% −0.37
TXNM TXNM Energy Inc. Sold out 0.00% −0.37
CROX Crocs Inc. Reduce -11.3% 0.60% −0.36
KMPR Kemper Corp. Reduce -26.5% 1.03% −0.36
NMM Navios Maritime Partners LP Sold out 0.00% −0.36
NTRA Natera Inc. Reduce -53.9% 0.41% −0.36
BV Brightview Holdings Inc. Reduce -47.4% 0.35% −0.36
MYGN Myriad Genetics Inc. Sold out 0.00% −0.36
OI O-I Glass Inc. Sold out 0.00% −0.34
MU Micron Technology Inc. Sold out 0.00% −0.33
RH RH Reduce -86.6% 0.06% −0.32
INSW International Seaways Inc. Sold out 0.00% −0.32
NOG Northern Oil and Gas Inc. Reduce -35.9% 0.49% −0.30
USAP Universal Stainless & Alloy Sold out 0.00% −0.29
KIDS Orthopediatrics Corp. Reduce -33.3% 0.32% −0.29
CALY Callaway Golf Company Sold out 0.00% −0.28
SONO Sonos Inc. Sold out 0.00% −0.24

Portfolio Buys Q3 2024 → Q4 2024
SMTC Semtech Corp. Add +609.5% 2.78% +2.46
SNAP Snap Inc. Class A New 1.71% +1.71
GTES Gates Industrial Corp. UK Ltd. New 1.55% +1.55
GCO Genesco Inc. New 1.33% +1.33
RDDT Reddit Inc. Class A Add +195.5% 1.45% +1.23
SLM SLM Corp. Add +128.3% 1.67% +1.02
KRUS Kura Sushi USA Inc. Class A Add +72.4% 2.27% +1.01
ELF Elf Beauty Inc. Add +92.8% 1.94% +1.00
PAYO Payoneer Global Inc. Add +103.7% 1.47% +0.89
TPR Tapestry Inc. New 0.87% +0.87
VPG Vishay Precision Group New 0.78% +0.78
TTMI TTM Technologies Add +22.6% 2.17% +0.76
PRCH Porch Group Inc. Add +476.0% 0.76% +0.72
RELY Remitly Global Inc. Add +96.6% 1.05% +0.71
ECPG Encore Capital Group Inc. New 0.69% +0.69
PSIX Power Solutions Internationa New 0.68% +0.68
UBS UBS Group AG-Reg New 0.66% +0.66
ACI Albertsons Cos Inc. Class A New 0.65% +0.65
MLR Miller Industries Inc. New 0.63% +0.63
EBAY eBay Inc. Add +210.2% 0.99% +0.63
ENVA Enova International Inc. Add +76.5% 1.34% +0.63
DKNG Draftkings Inc. Class A Add +294.0% 0.80% +0.57
BILL Bill Holdings Inc. New 0.56% +0.56
MOD Modine Manufacturing Co. Add +57.5% 2.56% +0.56
DELL Dell Technologies -C Add +366.8% 0.68% +0.52
OSG Octave Specialty Group Inc. New 0.50% +0.50
CORZ Core Scientific Inc. Add +85.8% 0.97% +0.49
ULTA Ulta Beauty Inc. New 0.49% +0.49
MRX Marex UK Holdings Ltd. New 0.47% +0.47
BELFB Bel Fuse Inc. Class B Add +72.5% 1.16% +0.47
WEAV Weave Communications Inc. New 0.46% +0.46
WRBY Warby Parker Inc. Class A Add +89.3% 0.72% +0.44
CADL Candel Therapeutics Inc. New 0.44% +0.44
ESTA Establishment Labs Holdings Add +243.2% 0.60% +0.42
LUXE Luxexperience BV Add +5.4% 0.91% +0.41
VIRT Virtu Financial Inc. Class A Add +35.1% 1.27% +0.40
STNG Scorpio Tankers Inc. New 0.40% +0.40
MYRG MYR Group Inc./Delaware New 0.38% +0.38
ORCL Oracle Corp. Add +97.9% 0.87% +0.38
ALTG Alta Equipment Group Inc. New 0.37% +0.37
KOS Kosmos Energy Ltd. New 0.37% +0.37
LUCK Lucky Strike Entertainment C Add +102.6% 0.96% +0.36
DBRG Digitalbridge Group Inc. Add +238.1% 0.60% +0.36
NTGR Netgear Inc. New 0.36% +0.36
CTOS Custom Truck One Source Inc. Add +152.8% 0.47% +0.33
QNST Quinstreet Inc. Add +14.4% 1.42% +0.31
GOOS Canada Goose Holdings Inc. New 0.30% +0.30
STKL Sunopta Inc. Add +32.8% 0.86% +0.28
DY Dycom Industries Inc. New 0.27% +0.27
SMWB Similarweb Ltd. New 0.27% +0.27

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