Portolan Capital Management, LLC
In its 13F for Q3 2024 (holdings as of September 30, 2024, filed November 14, 2024), Portolan Capital Management, LLC reported 129 stock positions worth $1.4 billion. Its top holding was Lantheus (LNTH) at 5.3% of the portfolio, followed by Zeta Global Class A (ZETA, 3.0%) and Kratos Defense & Security (KTOS, 3.0%). Compared with Q2 2024, it opened 36 new positions, sold out of 24, added to 48 and reduced 45. The biggest buy was a new position in Talen Energy (TLN) and the biggest sale Super Micro Computer (SMCI, shares −60%).
- Most Recent 13F
- Q2 2026
- Location
- BOSTON, MA
- CIK
- 0001350290
- Portfolio Value
- $1.4B (Q3 2024)
- SEC Filing
- 0001104659-24-118686 ↗ filed Nov 14, 2024
Holdings Value
Holdings 129 stocks · $1.4B
| LNTH Lantheus Holdings Inc. | 5.34% | 670,881 | $73.6M | Add +6.1% |
| ZETA Zeta Global Holdings Corp. Class A | 3.04% | 1,405,132 | $41.9M | Reduce -26.8% |
| KTOS Kratos Defense & Security | 3.00% | 1,776,740 | $41.4M | Add +9.0% |
| TLN Talen Energy Corp. | 2.86% | 221,145 | $39.4M | New |
| CLS Celestica Inc. | 2.71% | 730,946 | $37.4M | Reduce -2.9% |
| CSTL Castle Biosciences Inc. | 2.60% | 1,255,628 | $35.8M | Add +3.7% |
| RDNT Radnet Inc. | 2.47% | 491,358 | $34.1M | Add +384.8% |
| QTRX Quanterix Corp. | 2.37% | 2,520,686 | $32.7M | Add +31.4% |
| PHAT Phathom Pharmaceuticals Inc. | 2.23% | 1,699,918 | $30.7M | Add +50.4% |
| MOD Modine Manufacturing Co. | 2.01% | 208,766 | $27.7M | Reduce -25.1% |
| HNST The Honest Co. Inc. | 1.98% | 7,668,350 | $27.4M | Reduce -5.4% |
| GDS GDS Holdings Ltd. - ADR filed as GDS HLDGS LTD | 1.93% | 1,302,533 | $26.6M | New |
| GENI Genius Sports Ltd. | 1.80% | 3,170,891 | $24.9M | Add +9.4% |
| CDMO Avid Bioservices Inc. | 1.73% | 2,093,991 | $23.8M | Add +15.0% |
| CLBT Cellebrite Di Ltd. | 1.49% | 1,224,020 | $20.6M | Add +19.9% |
| TGLS Tecnoglass Holdings Inc. | 1.45% | 290,880 | $20.0M | Reduce -0.9% |
| SG Sweetgreen Inc. Class A | 1.43% | 555,569 | $19.7M | Add +32.3% |
| TTMI TTM Technologies | 1.40% | 1,061,370 | $19.4M | Reduce -11.0% |
| KMPR Kemper Corp. | 1.39% | 313,300 | $19.2M | Add +9.4% |
| ACMR Acm Research Inc. Class A | 1.36% | 921,451 | $18.7M | Add +7.7% |
| KRUS Kura Sushi USA Inc. Class A | 1.26% | 216,530 | $17.4M | Add +15.3% |
| EXTR Extreme Networks Inc. | 1.16% | 1,060,828 | $15.9M | Add +194.6% |
| AMPH Amphastar Pharmaceuticals Inc. | 1.15% | 327,764 | $15.9M | Add +201.1% |
| ALGN Align Technology Inc. | 1.11% | 60,386 | $15.4M | New |
| QNST Quinstreet Inc. | 1.11% | 801,693 | $15.3M | Add +9.6% |
| MRVI Maravai Lifesciences Hldgs-A | 1.08% | 1,792,529 | $14.9M | Reduce -2.9% |
| FLEX Flex Ltd. | 1.07% | 440,856 | $14.7M | Add +23.5% |
| BASE Couchbase Inc. | 1.02% | 874,795 | $14.1M | Add +77.8% |
| COMP Compass Inc. Class A | 1.01% | 2,287,336 | $14.0M | New |
| IIIV I3 Verticals Inc. Class A | 1.01% | 653,072 | $13.9M | Add +3.8% |
| BIDU Baidu Inc. - Spon ADR | 1.01% | 132,066 | $13.9M | Add +55.6% |
| VRT Vertiv Holdings Co. Class A | 1.00% | 138,877 | $13.8M | Add +35.5% |
| CROX Crocs Inc. | 0.96% | 91,776 | $13.3M | Add +44.8% |
| ELF Elf Beauty Inc. | 0.94% | 119,289 | $13.0M | Reduce -14.6% |
| GEHC GE Healthcare Technology | 0.93% | 136,625 | $12.8M | New |
| MDU Mdu Resources Group Inc. | 0.88% | 445,288 | $12.2M | Add +70.0% |
| SRAD Sportradar Group AG-A | 0.87% | 995,953 | $12.1M | New |
| FOUR SHIFT4 Payments Inc. Class A | 0.86% | 134,612 | $11.9M | Reduce -28.2% |
| VIRT Virtu Financial Inc. Class A | 0.86% | 391,272 | $11.9M | New |
| ORN Orion Group Holdings Inc. | 0.83% | 1,985,355 | $11.5M | Add +56.6% |
| HZO Marinemax Inc. | 0.82% | 319,576 | $11.3M | New |
| OPRA Opera Ltd.-ADR | 0.80% | 711,820 | $11.0M | Add +63.5% |
| UTHR United Therapeutics Corp. | 0.79% | 30,506 | $10.9M | Reduce -44.4% |
| NOG Northern Oil and Gas Inc. | 0.79% | 307,240 | $10.9M | Add +15.0% |
| BLFS Biolife Solutions Inc. | 0.78% | 427,876 | $10.7M | Reduce -57.4% |
| NTRA Natera Inc. | 0.77% | 83,680 | $10.6M | Reduce -49.8% |
| SKX Skechers USA Inc. Class A | 0.75% | 154,059 | $10.3M | Reduce -15.9% |
| ENVA Enova International Inc. | 0.72% | 118,056 | $9.9M | Reduce -3.3% |
| BV Brightview Holdings Inc. | 0.71% | 620,515 | $9.8M | Add +27.9% |
| NVT Nvent Electric PLC | 0.70% | 138,307 | $9.7M | Reduce -60.3% |
| BELFB Bel Fuse Inc. Class B | 0.69% | 120,858 | $9.5M | Add +122.8% |
| PRIM Primoris Services Corp. | 0.69% | 163,090 | $9.5M | Add +28.9% |
| AAOI Applied Optoelectronics Inc. | 0.68% | 658,592 | $9.4M | Reduce -21.7% |
| LMB Limbach Holdings Inc. | 0.68% | 123,354 | $9.3M | Add +70.5% |
| WDC Western Digital Corp. | 0.67% | 135,227 | $9.2M | Reduce -62.0% |
| META Meta Platforms Inc. Class A | 0.66% | 15,980 | $9.1M | Reduce -32.5% |
| SLM SLM Corp. | 0.65% | 394,437 | $9.0M | Add +23.8% |
| KIDS Orthopediatrics Corp. | 0.61% | 308,099 | $8.4M | Add +66.2% |
| LUCK Lucky Strike Entertainment C filed as BOWLERO CORP | 0.60% | 705,357 | $8.3M | New |
| PAYO Payoneer Global Inc. | 0.58% | 1,067,216 | $8.0M | Reduce -36.4% |
| STKL Sunopta Inc. | 0.58% | 1,255,931 | $8.0M | Add +6.1% |
| VKTX Viking Therapeutics Inc. | 0.58% | 125,762 | $8.0M | Add +58.4% |
| IESC Ies Holdings Inc. filed as IES HLDGS INC | 0.57% | 39,391 | $7.9M | Reduce -43.3% |
| PBPB Potbelly Corp. | 0.55% | 902,529 | $7.5M | Add +21.7% |
| BIO Bio-Rad Laboratories-A | 0.53% | 21,900 | $7.3M | Reduce -12.9% |
| SMCI Super Micro Computer Inc. | 0.52% | 17,133 | $7.1M | Reduce -59.6% |
| GNRC Generac Holdings Inc. | 0.51% | 44,225 | $7.0M | New |
| MAMA Mama's Creations Inc. | 0.50% | 953,629 | $7.0M | Add +177.2% |
| LUXE Luxexperience BV filed as MYT NETHERLANDS PARENT B V | 0.50% | 1,805,758 | $6.9M | Add +30.6% |
| MGPI MGP Ingredients Inc. | 0.49% | 81,400 | $6.8M | New |
| ORCL Oracle Corp. | 0.48% | 39,022 | $6.6M | Reduce -45.9% |
| MTCH Match Group Inc. | 0.48% | 173,414 | $6.6M | New |
| CORZ Core Scientific Inc. | 0.47% | 551,977 | $6.5M | New |
| TTWO Take-Two Interactive Softwre | 0.47% | 42,564 | $6.5M | Add +2.9% |
| MTRX Matrix Service Co. | 0.43% | 509,059 | $5.9M | Add +34.3% |
| WEX Wex Inc. | 0.41% | 26,870 | $5.6M | Add +108.9% |
| APLD Applied Digital Corp. | 0.40% | 672,254 | $5.5M | Reduce -11.1% |
| HCAT Health Catalyst Inc. | 0.39% | 663,602 | $5.4M | New |
| INDI Indie Semiconductor Inc. Class A | 0.39% | 1,344,430 | $5.4M | Reduce -34.1% |
| DOUG Douglas Elliman Inc. | 0.39% | 2,910,906 | $5.3M | New |
| RH RH | 0.38% | 15,480 | $5.2M | New |
| MXCT Maxcyte Inc. | 0.37% | 1,303,438 | $5.1M | Reduce -22.8% |
| TXNM TXNM Energy Inc. | 0.37% | 115,360 | $5.0M | New |
| EBAY eBay Inc. | 0.36% | 76,760 | $5.0M | New |
| NMM Navios Maritime Partners LP | 0.36% | 79,221 | $5.0M | Reduce -21.6% |
| MYGN Myriad Genetics Inc. | 0.36% | 179,634 | $4.9M | New |
| NVGS Navigator Holdings Ltd. | 0.35% | 300,408 | $4.8M | Add +4.6% |
| RPRX Royalty Pharma PLC Class A | 0.35% | 170,464 | $4.8M | New |
| RELY Remitly Global Inc. | 0.34% | 353,054 | $4.7M | Add +96.3% |
| OI O-I Glass Inc. | 0.34% | 353,166 | $4.6M | New |
| MU Micron Technology Inc. | 0.33% | 43,990 | $4.6M | Reduce -63.7% |
| INSW International Seaways Inc. | 0.32% | 84,625 | $4.4M | Reduce -9.2% |
| SMTC Semtech Corp. | 0.31% | 94,036 | $4.3M | Add +46.5% |
| CACI Caci International Inc. Class A | 0.31% | 8,476 | $4.3M | New |
| OTLY Oatly Group AB | 0.29% | 4,745,911 | $4.1M | Add +8.3% |
| USAP Universal Stainless & Alloy | 0.29% | 104,916 | $4.1M | New |
| PSN Parsons Corp. | 0.28% | 37,597 | $3.9M | New |
| CALY Callaway Golf Company filed as TOPGOLF CALLAWAY BRANDS CORP | 0.28% | 351,691 | $3.9M | New |
| WRBY Warby Parker Inc. Class A | 0.28% | 233,401 | $3.8M | Reduce -22.9% |
| FORR Forrester Research Inc. | 0.27% | 206,599 | $3.7M | Reduce -22.0% |
Portfolio Sells Q2 2024 → Q3 2024
| SMCI Super Micro Computer Inc. | Reduce -59.6% | 0.52% | −2.35 |
| WDC Western Digital Corp. | Reduce -62.0% | 0.67% | −1.55 |
| NVT Nvent Electric PLC | Reduce -60.3% | 0.70% | −1.49 |
| ELF Elf Beauty Inc. | Reduce -14.6% | 0.94% | −1.48 |
| AIG American International Group | Sold out | 0.00% | −1.19 |
| SIMO Silicon Motion Technol-ADR | Sold out | 0.00% | −1.14 |
| BLFS Biolife Solutions Inc. | Reduce -57.4% | 0.78% | −1.00 |
| MU Micron Technology Inc. | Reduce -63.7% | 0.33% | −0.98 |
| CELH Celsius Holdings Inc. | Sold out | 0.00% | −0.92 |
| AVAV Aerovironment Inc. | Sold out | 0.00% | −0.92 |
| AEM Agnico Eagle Mines Ltd. | Sold out | 0.00% | −0.91 |
| SMWB Similarweb Ltd. | Sold out | 0.00% | −0.87 |
| DELL Dell Technologies -C | Reduce -79.1% | 0.16% | −0.86 |
| CLS Celestica Inc. | Reduce -2.9% | 2.71% | −0.85 |
| RDDT Reddit Inc. Class A | Reduce -76.1% | 0.21% | −0.77 |
| ARCT Arcturus Therapeutics Holdin | Reduce -73.4% | 0.22% | −0.76 |
| GTES Gates Industrial Corp. UK Ltd. | Sold out | 0.00% | −0.73 |
| NTRA Natera Inc. | Reduce -49.8% | 0.77% | −0.72 |
| PENG Penguin Solutions Inc. | Reduce -79.8% | 0.14% | −0.70 |
| INDI Indie Semiconductor Inc. Class A | Reduce -34.1% | 0.39% | −0.65 |
| UTHR United Therapeutics Corp. | Reduce -44.4% | 0.79% | −0.65 |
| TECK Teck Resources Ltd.-CLS B | Sold out | 0.00% | −0.63 |
| RPAY Repay Holdings Corp. | Sold out | 0.00% | −0.62 |
| AU Anglogold Ashanti PLC | Reduce -89.3% | 0.07% | −0.62 |
| STNG Scorpio Tankers Inc. | Sold out | 0.00% | −0.60 |
| EGO Eldorado Gold Corp. | Sold out | 0.00% | −0.57 |
| INFN Infinera Corp. | Sold out | 0.00% | −0.54 |
| VRN Veren Inc. | Sold out | 0.00% | −0.51 |
| TTMI TTM Technologies | Reduce -11.0% | 1.40% | −0.50 |
| MITK Mitek Systems Inc. | Reduce -50.6% | 0.23% | −0.45 |
| AKAM Akamai Technologies Inc. | Sold out | 0.00% | −0.44 |
| AOSL Alpha & Omega Semiconductor | Sold out | 0.00% | −0.42 |
| TLS Telos Corporation | Sold out | 0.00% | −0.37 |
| WKME Walkme Ltd. | Sold out | 0.00% | −0.36 |
| ORCL Oracle Corp. | Reduce -45.9% | 0.48% | −0.36 |
| AMKR Amkor Technology Inc. | Sold out | 0.00% | −0.32 |
| ALT Altimmune Inc. | Reduce -90.5% | 0.03% | −0.32 |
| META Meta Platforms Inc. Class A | Reduce -32.5% | 0.66% | −0.32 |
| HDL Super Hi International Holdi | Reduce -66.2% | 0.13% | −0.31 |
| PCRX Pacira Biosciences Inc. | Sold out | 0.00% | −0.31 |
| SKX Skechers USA Inc. Class A | Reduce -15.9% | 0.75% | −0.30 |
| MOD Modine Manufacturing Co. | Reduce -25.1% | 2.01% | −0.29 |
| CTOS Custom Truck One Source Inc. | Reduce -51.6% | 0.14% | −0.28 |
| FOUR SHIFT4 Payments Inc. Class A | Reduce -28.2% | 0.86% | −0.27 |
| EVER Everquote Inc. Class A | Sold out | 0.00% | −0.24 |
| IESC Ies Holdings Inc. | Reduce -43.3% | 0.57% | −0.23 |
| OPK Opko Health Inc. | Sold out | 0.00% | −0.19 |
| PAYO Payoneer Global Inc. | Reduce -36.4% | 0.58% | −0.18 |
| MXCT Maxcyte Inc. | Reduce -22.8% | 0.37% | −0.18 |
| INSW International Seaways Inc. | Reduce -9.2% | 0.32% | −0.14 |
Portfolio Buys Q2 2024 → Q3 2024
| TLN Talen Energy Corp. | New | 2.86% | +2.86 |
| RDNT Radnet Inc. | Add +384.8% | 2.47% | +1.98 |
| GDS GDS Holdings Ltd. - ADR | New | 1.93% | +1.93 |
| PHAT Phathom Pharmaceuticals Inc. | Add +50.4% | 2.23% | +1.27 |
| LNTH Lantheus Holdings Inc. | Add +6.1% | 5.34% | +1.16 |
| ALGN Align Technology Inc. | New | 1.11% | +1.11 |
| COMP Compass Inc. Class A | New | 1.01% | +1.01 |
| GEHC GE Healthcare Technology | New | 0.93% | +0.93 |
| SRAD Sportradar Group AG-A | New | 0.87% | +0.87 |
| VIRT Virtu Financial Inc. Class A | New | 0.86% | +0.86 |
| HZO Marinemax Inc. | New | 0.82% | +0.82 |
| AMPH Amphastar Pharmaceuticals Inc. | Add +201.1% | 1.15% | +0.79 |
| EXTR Extreme Networks Inc. | Add +194.6% | 1.16% | +0.76 |
| CDMO Avid Bioservices Inc. | Add +15.0% | 1.73% | +0.66 |
| LUCK Lucky Strike Entertainment C | New | 0.60% | +0.60 |
| GNRC Generac Holdings Inc. | New | 0.51% | +0.51 |
| GENI Genius Sports Ltd. | Add +9.4% | 1.80% | +0.50 |
| MGPI MGP Ingredients Inc. | New | 0.49% | +0.49 |
| CLBT Cellebrite Di Ltd. | Add +19.9% | 1.49% | +0.49 |
| MTCH Match Group Inc. | New | 0.48% | +0.48 |
| CORZ Core Scientific Inc. | New | 0.47% | +0.47 |
| CSTL Castle Biosciences Inc. | Add +3.7% | 2.60% | +0.43 |
| BIDU Baidu Inc. - Spon ADR | Add +55.6% | 1.01% | +0.40 |
| BELFB Bel Fuse Inc. Class B | Add +122.8% | 0.69% | +0.40 |
| HCAT Health Catalyst Inc. | New | 0.39% | +0.39 |
| DOUG Douglas Elliman Inc. | New | 0.39% | +0.39 |
| SG Sweetgreen Inc. Class A | Add +32.3% | 1.43% | +0.39 |
| RH RH | New | 0.38% | +0.38 |
| TXNM TXNM Energy Inc. | New | 0.37% | +0.37 |
| EBAY eBay Inc. | New | 0.36% | +0.36 |
| MYGN Myriad Genetics Inc. | New | 0.36% | +0.36 |
| RPRX Royalty Pharma PLC Class A | New | 0.35% | +0.35 |
| MDU Mdu Resources Group Inc. | Add +70.0% | 0.88% | +0.34 |
| LMB Limbach Holdings Inc. | Add +70.5% | 0.68% | +0.34 |
| OI O-I Glass Inc. | New | 0.34% | +0.34 |
| KTOS Kratos Defense & Security | Add +9.0% | 3.00% | +0.31 |
| MAMA Mama's Creations Inc. | Add +177.2% | 0.50% | +0.31 |
| CACI Caci International Inc. Class A | New | 0.31% | +0.31 |
| OPRA Opera Ltd.-ADR | Add +63.5% | 0.80% | +0.29 |
| USAP Universal Stainless & Alloy | New | 0.29% | +0.29 |
| KRUS Kura Sushi USA Inc. Class A | Add +15.3% | 1.26% | +0.29 |
| BASE Couchbase Inc. | Add +77.8% | 1.02% | +0.28 |
| PSN Parsons Corp. | New | 0.28% | +0.28 |
| QTRX Quanterix Corp. | Add +31.4% | 2.37% | +0.28 |
| CALY Callaway Golf Company | New | 0.28% | +0.28 |
| VRT Vertiv Holdings Co. Class A | Add +35.5% | 1.00% | +0.27 |
| DBRG Digitalbridge Group Inc. | New | 0.24% | +0.24 |
| SONO Sonos Inc. | New | 0.24% | +0.24 |
| CRMT America's Car-Mart Inc. | New | 0.23% | +0.23 |
| DKNG Draftkings Inc. Class A | New | 0.23% | +0.23 |
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 |