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
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% |
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
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 148 | $2.7B | VPG, VIRT, TTMI, MOD, QLYS |
| Q1 2026 | 144 | $1.9B | MOD, TTMI, CLS, VIRT, AKAM |
| Q4 2025 | 155 | $1.9B | TTMI, MOD, CSTL, CLS, AKAM |
| Q3 2025 | 119 | $1.8B | MOD, TTMI, ELF, DBRG, CLS |
| Q2 2025 | 118 | $1.6B | CLS, KTOS, ELF, AVAV, MOD |
| Q1 2025 | 109 | $1.3B | LNTH, SLM, KTOS, GENI, MOD |
| Q4 2024 | 131 | $1.5B | LNTH, CLS, SMTC, MOD, HNST |
| Q3 2024 | 129 | $1.4B | LNTH, ZETA, KTOS, TLN, CLS |
| Q2 2024 | 117 | $1.2B | LNTH, CLS, SMCI, ZETA, KTOS |
| Q1 2024 | 116 | $1.3B | SMCI, CLS, LNTH, ELF, BIO |