Portolan Capital Management
Latest statistics and disclosures from Portolan Capital Management's latest quarterly 13F-HR filing:
- Top 5 stock holdings are MOD, TTMI, CLS, VIRT, AKAM, and represent 16.92% of Portolan Capital Management's stock portfolio.
- Added to shares of these 10 stocks: PARR (+$44M), PBF (+$38M), VIRT (+$37M), CRGY (+$35M), MUSA (+$24M), FN (+$23M), CRCL (+$20M), DHT (+$20M), ECO (+$19M), QLYS (+$16M).
- Started 30 new stock positions in ESI, PUMP, HQY, PARR, AS, MUSA, BL, GHM, AMSC, PBF.
- Reduced shares in these 10 stocks: TTMI (-$41M), MOD (-$27M), LASR (-$21M), FSLR (-$21M), TSEM (-$20M), , BELFB (-$17M), AAOI (-$17M), SPHR (-$17M), MRX (-$16M).
- Sold out of its positions in ARE, BAND, TECH, CMTG, DKNG, FAF, FSLR, FCX, HBIO, INDI.
- Portolan Capital Management was a net seller of stock by $-9.5M.
- Portolan Capital Management has $1.9B in assets under management (AUM), dropping by 0.67%.
- Central Index Key (CIK): 0001350290
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Portfolio Holdings for Portolan Capital Management
Portolan Capital Management holds 144 positions in its portfolio as reported in the March 2026 quarterly 13F filing
| Company (Ticker) | Portfolio Weight | Valued At | Change in Shares | Share Count | Share Price | |
|---|---|---|---|---|---|---|
| Modine Manufacturing (MOD) | 4.8 | $89M | -23% | 412k | 216.71 |
|
| TTM Technologies (TTMI) | 3.8 | $71M | -36% | 728k | 97.42 |
|
| Celestica (CLS) | 3.0 | $56M | +14% | 198k | 281.68 |
|
| Virtu Finl Cl A (VIRT) | 2.8 | $53M | +222% | 1.2M | 43.98 |
|
| Akamai Technologies (AKAM) | 2.6 | $49M | -19% | 423k | 114.85 |
|
| Vishay Precision (VPG) | 2.4 | $44M | +16% | 1.0M | 43.42 |
|
| Par Pac Holdings Com New (PARR) | 2.3 | $44M | NEW | 694k | 62.64 |
|
| Powell Industries (POWL) | 2.2 | $41M | -4% | 76k | 541.08 |
|
| Baidu Spon Adr Rep A (BIDU) | 2.2 | $41M | +38% | 366k | 111.42 |
|
| Pbf Energy Cl A (PBF) | 2.0 | $38M | NEW | 800k | 47.62 |
|
| United Therapeutics Corporation (UTHR) | 2.0 | $38M | +72% | 63k | 592.98 |
|
| The Real Brokerage Com New (REAX) | 1.9 | $36M | +34% | 15M | 2.50 |
|
| Canada Goose Hldgs Shs Sub Vtg (GOOS) | 1.9 | $35M | +50% | 3.2M | 10.97 |
|
| Crescent Energy Company Cl A Com (CRGY) | 1.9 | $35M | +6419% | 2.6M | 13.50 |
|
| Castle Biosciences (CSTL) | 1.8 | $33M | -21% | 1.4M | 24.55 |
|
| Lantheus Holdings Inc Common Stock Usd 0.01 (LNTH) | 1.7 | $32M | -12% | 417k | 75.85 |
|
| Cellebrite Di Ordinary Shares (CLBT) | 1.6 | $30M | +69% | 2.2M | 13.78 |
|
| Luxexperience Bv Sponsored Ads (LUXE) | 1.6 | $30M | +40% | 3.7M | 8.00 |
|
| Flextronics Intl Ord (FLEX) | 1.5 | $29M | -5% | 443k | 65.46 |
|
| Fabrinet SHS (FN) | 1.5 | $29M | +403% | 55k | 521.52 |
|
| Okeanis Eco Tankers Cor SHS (ECO) | 1.5 | $27M | +233% | 539k | 50.59 |
|
| Talen Energy Corp (TLN) | 1.4 | $26M | +8% | 82k | 319.23 |
|
| Semtech Corporation (SMTC) | 1.4 | $26M | -34% | 332k | 76.89 |
|
| Core Natural Resources Com Shs (CNR) | 1.3 | $25M | +81% | 237k | 104.73 |
|
| Murphy Usa (MUSA) | 1.3 | $24M | NEW | 48k | 493.97 |
|
| Biogen Idec (BIIB) | 1.2 | $22M | +39% | 119k | 183.33 |
|
| Kura Sushi Usa Cl A Com (KRUS) | 1.1 | $21M | +57% | 301k | 69.79 |
|
| Qualys (QLYS) | 1.1 | $21M | +360% | 239k | 87.85 |
|
| Jabil Circuit (JBL) | 1.1 | $21M | +9% | 77k | 265.63 |
|
| Circle Internet Group Com Cl A (CRCL) | 1.1 | $20M | NEW | 214k | 95.41 |
|
| Dht Holdings Shs New (DHT) | 1.1 | $20M | NEW | 1.1M | 18.27 |
|
| Nokia Corp Sponsored Adr (NOK) | 1.0 | $19M | +122% | 2.4M | 8.04 |
|
| Allied Motion Technologies (ALNT) | 1.0 | $19M | +7% | 324k | 59.09 |
|
| Primoris Services (PRIM) | 1.0 | $19M | +23% | 131k | 143.04 |
|
| Dave Class A Com New (DAVE) | 1.0 | $18M | +139% | 105k | 174.09 |
|
| Kratos Defense & Sec Solutio Com New (KTOS) | 1.0 | $18M | -11% | 260k | 70.51 |
|
| Mamamancini's Holdings (MAMA) | 1.0 | $18M | -5% | 1.2M | 15.34 |
|
| Adeia (ADEA) | 0.9 | $18M | +184% | 730k | 24.03 |
|
| Upwork (UPWK) | 0.9 | $17M | +118% | 1.6M | 10.96 |
|
| Pulse Biosciences (PLSE) | 0.8 | $16M | +86% | 733k | 21.59 |
|
| Porch Group (PRCH) | 0.8 | $15M | +2% | 2.1M | 7.17 |
|
| Hafnia SHS (HAFN) | 0.8 | $15M | NEW | 1.9M | 7.60 |
|
| Mayville Engineering (MEC) | 0.8 | $15M | +60% | 821k | 17.95 |
|
| Candel Therapeutics (CADL) | 0.8 | $14M | +70% | 2.9M | 4.90 |
|
| Nlight (LASR) | 0.7 | $13M | -61% | 226k | 57.02 |
|
| Genius Sports Shares Cl A (GENI) | 0.7 | $12M | -5% | 2.8M | 4.43 |
|
| Amer Sports Com Shs (AS) | 0.6 | $12M | NEW | 358k | 32.92 |
|
| eBay (EBAY) | 0.6 | $12M | +116% | 126k | 91.02 |
|
| Park Aerospace Corp. Cmn Pke (PKE) | 0.6 | $11M | +67% | 411k | 27.38 |
|
| Enova Intl (ENVA) | 0.6 | $11M | -17% | 81k | 135.83 |
|
| Remitly Global (RELY) | 0.6 | $11M | +11% | 698k | 15.67 |
|
| Evolv Technologies Hldngs In Com Cl A (EVLV) | 0.6 | $11M | NEW | 1.8M | 6.05 |
|
| Warby Parker Cl A Com (WRBY) | 0.6 | $11M | -59% | 501k | 21.07 |
|
| Bel Fuse CL B (BELFB) | 0.6 | $11M | -61% | 53k | 197.98 |
|
| Lightpath Technologies Com Cl A (LPTH) | 0.6 | $10M | -55% | 1.0M | 10.03 |
|
| Quanterix Ord (QTRX) | 0.6 | $10M | -34% | 2.9M | 3.52 |
|
| Regal-beloit Corporation (RRX) | 0.5 | $10M | +133% | 54k | 187.26 |
|
| American Superconductor Corp Shs New (AMSC) | 0.5 | $10M | NEW | 296k | 33.85 |
|
| Twilio Cl A (TWLO) | 0.5 | $9.4M | NEW | 75k | 125.82 |
|
| Shift4 Pmts Cl A (FOUR) | 0.5 | $9.4M | -54% | 214k | 43.73 |
|
| Honest (HNST) | 0.5 | $9.0M | -36% | 3.0M | 2.94 |
|
| Forrester Research (FORR) | 0.5 | $8.7M | +118% | 1.5M | 5.66 |
|
| Open Lending Corp (LPRO) | 0.5 | $8.6M | +45% | 6.9M | 1.25 |
|
| Moog Cl A (MOG.A) | 0.5 | $8.6M | NEW | 29k | 292.64 |
|
| Veeco Instruments (VECO) | 0.5 | $8.6M | NEW | 253k | 33.86 |
|
| Healthequity (HQY) | 0.5 | $8.5M | NEW | 102k | 83.57 |
|
| Elf Beauty (ELF) | 0.4 | $8.3M | -28% | 137k | 60.61 |
|
| Digi International (DGII) | 0.4 | $8.2M | -28% | 170k | 48.20 |
|
| Graham Corporation (GHM) | 0.4 | $8.2M | NEW | 104k | 78.92 |
|
| Zeta Global Holdings Corp Cl A (ZETA) | 0.4 | $7.7M | -63% | 486k | 15.92 |
|
| Element Solutions (ESI) | 0.4 | $7.6M | NEW | 221k | 34.14 |
|
| Repay Hldgs Corp Com Cl A (RPAY) | 0.4 | $7.4M | +2% | 2.9M | 2.60 |
|
| Ermenegildo Zegna N V Ord Shs (ZGN) | 0.4 | $7.4M | 711k | 10.42 |
|
|
| Willdan (WLDN) | 0.4 | $7.2M | +63% | 94k | 76.56 |
|
| Axcelis Technologies Com New (ACLS) | 0.4 | $7.2M | NEW | 77k | 93.08 |
|
| Ciena Corp Com New (CIEN) | 0.4 | $7.2M | -67% | 19k | 388.23 |
|
| Ranpak Holdings Corp Com Cl A (PACK) | 0.4 | $7.0M | 1.9M | 3.57 |
|
|
| Vnet Group Sponsored Ads A (VNET) | 0.4 | $6.9M | +2% | 826k | 8.39 |
|
| On Hldg Namen Akt A (ONON) | 0.4 | $6.9M | NEW | 202k | 34.02 |
|
| Nextpower Class A Com (NXT) | 0.4 | $6.8M | -28% | 57k | 120.55 |
|
| Frequency Electronics (FEIM) | 0.4 | $6.6M | +32% | 150k | 44.26 |
|
| Genedx Holdings Corp Com Cl A (WGS) | 0.4 | $6.6M | +83% | 103k | 64.22 |
|
| Take-Two Interactive Software (TTWO) | 0.3 | $6.4M | -14% | 32k | 197.50 |
|
| Procept Biorobotics Corp (PRCT) | 0.3 | $6.3M | 252k | 25.01 |
|
|
| Northern Oil And Gas Inc Mn (NOG) | 0.3 | $6.0M | NEW | 204k | 29.23 |
|
| Caredx (CDNA) | 0.3 | $5.9M | -55% | 340k | 17.36 |
|
| Blackline (BL) | 0.3 | $5.9M | NEW | 159k | 37.00 |
|
| Meta Platforms Cl A (META) | 0.3 | $5.9M | 10k | 572.13 |
|
|
| Celsius Hldgs Com New (CELH) | 0.3 | $5.8M | NEW | 165k | 35.48 |
|
| Digitalbridge Group Cl A New (DBRG) | 0.3 | $5.8M | -54% | 373k | 15.42 |
|
| Ies Hldgs (IESC) | 0.3 | $5.7M | 12k | 476.47 |
|
|
| Tower Semiconductor Shs New (TSEM) | 0.3 | $5.6M | -78% | 32k | 175.48 |
|
| Ambarella SHS (AMBA) | 0.3 | $5.6M | +100% | 109k | 51.48 |
|
| Century Aluminum Company (CENX) | 0.3 | $5.6M | NEW | 95k | 58.69 |
|
| Talos Energy (TALO) | 0.3 | $5.4M | +189% | 345k | 15.76 |
|
| Telix Pharmaceutical Sponsored Ads (TLX) | 0.3 | $5.2M | NEW | 541k | 9.57 |
|
| Miami Intl Hldgs (MIAX) | 0.3 | $5.0M | NEW | 129k | 38.92 |
|
| AeroVironment (AVAV) | 0.3 | $4.9M | -64% | 27k | 183.05 |
|
| Viavi Solutions Inc equities (VIAV) | 0.3 | $4.9M | NEW | 146k | 33.28 |
|
| Xpeng Ads (XPEV) | 0.3 | $4.7M | +184% | 275k | 17.11 |
|
| Personalis Ord (PSNL) | 0.2 | $4.7M | +94% | 737k | 6.37 |
|
| Mobileye Global Common Class A (MBLY) | 0.2 | $4.7M | +98% | 678k | 6.87 |
|
| I3 Verticals Com Cl A (IIIV) | 0.2 | $4.6M | -69% | 207k | 22.36 |
|
| Onto Innovation (ONTO) | 0.2 | $4.6M | NEW | 22k | 205.07 |
|
| Propetro Hldg (PUMP) | 0.2 | $4.5M | NEW | 315k | 14.41 |
|
| Sezzle (SEZL) | 0.2 | $4.4M | -58% | 70k | 63.29 |
|
| Novanta (NOVT) | 0.2 | $4.4M | -64% | 38k | 118.11 |
|
| Douglas Elliman (DOUG) | 0.2 | $4.4M | +13% | 2.7M | 1.64 |
|
| Vicor Corporation (VICR) | 0.2 | $4.3M | -45% | 27k | 161.00 |
|
| Lumentum Hldgs (LITE) | 0.2 | $4.1M | 5.8k | 702.76 |
|
|
| Bio Rad Labs Cl A (BIO) | 0.2 | $4.0M | -58% | 14k | 278.75 |
|
| Sanmina (SANM) | 0.2 | $3.5M | -58% | 27k | 129.64 |
|
| Forgent Power Solutions Com Shs Cl A (FPS) | 0.2 | $3.5M | NEW | 118k | 29.27 |
|
| Draganfly (DPRO) | 0.2 | $3.4M | NEW | 683k | 4.91 |
|
| Green Dot Corp Cl A (GDOT) | 0.2 | $3.4M | -26% | 299k | 11.22 |
|
| Acm Resh Com Cl A (ACMR) | 0.2 | $3.3M | -70% | 83k | 39.35 |
|
| Sprout Social Com Cl A (SPT) | 0.2 | $3.2M | +85% | 558k | 5.70 |
|
| Exzeo Group Com Shs (XZO) | 0.2 | $3.1M | -48% | 210k | 14.67 |
|
| Oshkosh Corporation (OSK) | 0.1 | $2.7M | -29% | 18k | 147.21 |
|
| Applied Optoelectronics (AAOI) | 0.1 | $2.5M | -86% | 30k | 84.59 |
|
| Amplitude Com Cl A (AMPL) | 0.1 | $2.5M | -35% | 360k | 6.82 |
|
| Tapestry (TPR) | 0.1 | $2.4M | -34% | 17k | 141.11 |
|
| Gigacloud Technology Class A Ord (GCT) | 0.1 | $2.4M | -62% | 52k | 45.38 |
|
| Natera (NTRA) | 0.1 | $2.3M | -26% | 11k | 199.99 |
|
| Ultra Clean Holdings (UCTT) | 0.1 | $2.1M | NEW | 34k | 62.18 |
|
| Sandridge Energy Com New (SD) | 0.1 | $2.0M | -7% | 124k | 16.31 |
|
| Fulgent Genetics (FLGT) | 0.1 | $1.7M | -37% | 107k | 15.90 |
|
| Kosmos Energy (KOS) | 0.1 | $1.7M | NEW | 603k | 2.78 |
|
| Alphabet Cap Stk Cl C (GOOG) | 0.1 | $1.6M | -18% | 5.7k | 286.86 |
|
| Solaris Energy Infras Com Cl A (SEI) | 0.1 | $1.6M | +43% | 28k | 56.51 |
|
| RadNet (RDNT) | 0.1 | $1.3M | -79% | 24k | 55.89 |
|
| Planet Labs Pbc Com Cl A (PL) | 0.1 | $1.3M | -31% | 47k | 27.95 |
|
| Guardant Health (GH) | 0.1 | $1.3M | -86% | 14k | 92.37 |
|
| Casella Waste Sys Cl A (CWST) | 0.1 | $1.2M | 15k | 79.34 |
|
|
| Dana Holding Corporation (DAN) | 0.1 | $1.2M | -86% | 34k | 33.65 |
|
| Tecogen Com New (TGEN) | 0.1 | $1.1M | 444k | 2.56 |
|
|
| Transmedics Group (TMDX) | 0.1 | $1.1M | -88% | 11k | 99.41 |
|
| Everus Constr Group (ECG) | 0.1 | $1.0M | 8.7k | 118.06 |
|
|
| L3harris Technologies (LHX) | 0.0 | $745k | 2.2k | 345.15 |
|
|
| GDS HLDGS Sponsored Ads (GDS) | 0.0 | $616k | 15k | 40.29 |
|
|
| Domo Com Cl B (DOMO) | 0.0 | $603k | -90% | 197k | 3.06 |
|
| Lincoln Educational Services Corporation (LINC) | 0.0 | $570k | 14k | 40.68 |
|
|
| Establishment Labs Holdings Ord (ESTA) | 0.0 | $544k | -89% | 9.6k | 56.78 |
|
| Amplify Energy Corp (AMPY) | 0.0 | $463k | -16% | 74k | 6.24 |
|
Past Filings by Portolan Capital Management
SEC 13F filings are viewable for Portolan Capital Management going back to 2010
- Portolan Capital Management 2026 Q1 filed May 15, 2026
- Portolan Capital Management 2025 Q4 filed Feb. 17, 2026
- Portolan Capital Management 2025 Q3 filed Nov. 13, 2025
- Portolan Capital Management 2025 Q2 filed Aug. 13, 2025
- Portolan Capital Management 2025 Q1 filed May 15, 2025
- Portolan Capital Management 2024 Q4 filed Feb. 13, 2025
- Portolan Capital Management 2024 Q3 filed Nov. 14, 2024
- Portolan Capital Management 2024 Q2 filed Aug. 14, 2024
- Portolan Capital Management 2024 Q1 filed May 15, 2024
- Portolan Capital Management 2023 Q4 filed Feb. 14, 2024
- Portolan Capital Management 2023 Q3 filed Nov. 14, 2023
- Portolan Capital Management 2023 Q2 filed Aug. 14, 2023
- Portolan Capital Management 2023 Q1 filed May 15, 2023
- Portolan Capital Management 2022 Q4 filed Feb. 13, 2023
- Portolan Capital Management 2022 Q3 filed Nov. 14, 2022
- Portolan Capital Management 2022 Q2 filed Aug. 15, 2022