Portolan Capital Management
Latest statistics and disclosures from Portolan Capital Management's latest quarterly 13F-HR filing:
- Top 5 stock holdings are TTMI, MOD, CSTL, CLS, AKAM, and represent 16.86% of Portolan Capital Management's stock portfolio.
- Added to shares of these 10 stocks: AKAM (+$46M), BIDU (+$34M), FAF (+$20M), REAX (+$18M), FOUR (+$18M), JBL (+$16M), MRX (+$16M), BIIB (+$15M), TECH (+$15M), FCX (+$15M).
- Started 57 new stock positions in CNR, METC, SD, SNAP, VIRT, PRCT, MBLY, MGA, SPT, VICR.
- Reduced shares in these 10 stocks: DBRG (-$71M), CLS (-$23M), KTOS (-$23M), ELF (-$22M), POWL (-$22M), WWW (-$22M), TSEM (-$21M), CLBT (-$20M), , AVAV (-$17M).
- Sold out of its positions in TIC, AMRC, BKSY, BXC, CELH, CXT, CTOS, GNRC, LEVI, LMT. ONTO, PSIX, PRG, RCKY, SITM, SPWH, VELO, WT, WWW, WYFI, SRAD.
- Portolan Capital Management was a net seller of stock by $-12M.
- Portolan Capital Management has $1.9B in assets under management (AUM), dropping by 1.00%.
- Central Index Key (CIK): 0001350290
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Portfolio Holdings for Portolan Capital Management
Portolan Capital Management holds 155 positions in its portfolio as reported in the December 2025 quarterly 13F filing
| Company (Ticker) | Portfolio Weight | Valued At | Change in Shares | Share Count | Share Price | |
|---|---|---|---|---|---|---|
| TTM Technologies (TTMI) | 4.2 | $79M | -3% | 1.1M | 69.00 |
|
| Modine Manufacturing (MOD) | 3.8 | $72M | -11% | 536k | 133.51 |
|
| Castle Biosciences (CSTL) | 3.6 | $67M | +14% | 1.7M | 38.90 |
|
| Celestica (CLS) | 2.7 | $51M | -31% | 172k | 295.61 |
|
| Akamai Technologies (AKAM) | 2.5 | $46M | NEW | 524k | 87.25 |
|
| The Real Brokerage Com New (REAX) | 2.1 | $39M | +86% | 11M | 3.65 |
|
| Semtech Corporation (SMTC) | 2.0 | $38M | -23% | 509k | 73.69 |
|
| Baidu Spon Adr Rep A (BIDU) | 1.8 | $35M | +5657% | 264k | 130.66 |
|
| Vishay Precision (VPG) | 1.8 | $34M | +6% | 878k | 38.50 |
|
| Genius Sports Shares Cl A (GENI) | 1.7 | $32M | -18% | 2.9M | 11.02 |
|
| Lantheus Holdings Inc Common Stock Usd 0.01 (LNTH) | 1.7 | $32M | +60% | 476k | 66.55 |
|
| Shift4 Pmts Cl A (FOUR) | 1.6 | $30M | +147% | 468k | 62.97 |
|
| Quanterix Ord (QTRX) | 1.5 | $29M | +6% | 4.5M | 6.36 |
|
| Flex Ord (FLEX) | 1.5 | $28M | -21% | 467k | 60.42 |
|
| Talen Energy Corp (TLN) | 1.5 | $28M | -20% | 75k | 374.84 |
|
| Canada Goose Hldgs Shs Sub Vtg (GOOS) | 1.5 | $28M | 2.1M | 12.95 |
|
|
| Warby Parker Cl A Com (WRBY) | 1.4 | $27M | +90% | 1.2M | 21.79 |
|
| Zeta Global Holdings Corp Cl A (ZETA) | 1.4 | $27M | +28% | 1.3M | 20.35 |
|
| Powell Industries (POWL) | 1.4 | $25M | -46% | 79k | 318.78 |
|
| Lightpath Technologies Com Cl A (LPTH) | 1.3 | $25M | +42% | 2.3M | 10.80 |
|
| Bel Fuse CL B (BELFB) | 1.3 | $24M | +12% | 140k | 169.63 |
|
| Cellebrite Di Ordinary Shares (CLBT) | 1.2 | $23M | -46% | 1.3M | 18.03 |
|
| Kratos Defense &sec Solutio Com New (KTOS) | 1.2 | $22M | -50% | 294k | 75.91 |
|
| Luxexperience Bv Sponsored Ads (LUXE) | 1.2 | $22M | +70% | 2.7M | 8.35 |
|
| Nlight (LASR) | 1.2 | $22M | -23% | 590k | 37.51 |
|
| First Solar (FSLR) | 1.1 | $21M | -5% | 79k | 261.23 |
|
| First American Financial (FAF) | 1.1 | $20M | NEW | 321k | 61.44 |
|
| Porch Group (PRCH) | 1.0 | $19M | +35% | 2.1M | 9.13 |
|
| AeroVironment (AVAV) | 1.0 | $18M | -48% | 76k | 241.89 |
|
| Domo Com Cl B (DOMO) | 1.0 | $18M | -19% | 2.2M | 8.43 |
|
| United Therapeutics Corporation (UTHR) | 1.0 | $18M | +103% | 37k | 487.25 |
|
| Tower Semiconductor Shs New (TSEM) | 0.9 | $17M | -54% | 149k | 117.42 |
|
| I3 Verticals Com Cl A (IIIV) | 0.9 | $17M | -10% | 672k | 25.19 |
|
| Mamamancini's Holdings (MAMA) | 0.9 | $17M | -38% | 1.2M | 13.49 |
|
| Sphere Entertainment Cl A (SPHR) | 0.9 | $17M | -15% | 176k | 95.08 |
|
| Allied Motion Technologies (ALNT) | 0.9 | $16M | +17% | 302k | 53.75 |
|
| Jabil Circuit (JBL) | 0.9 | $16M | NEW | 71k | 228.02 |
|
| Marex Group Ord (MRX) | 0.9 | $16M | NEW | 419k | 38.36 |
|
| Enova Intl (ENVA) | 0.8 | $15M | 98k | 157.20 |
|
|
| Biogen Idec (BIIB) | 0.8 | $15M | NEW | 85k | 175.99 |
|
| Bio-techne Corporation (TECH) | 0.8 | $15M | NEW | 249k | 58.81 |
|
| Freeport-mcmoran CL B (FCX) | 0.8 | $15M | NEW | 288k | 50.79 |
|
| Elf Beauty (ELF) | 0.8 | $15M | -60% | 192k | 76.04 |
|
| Caredx (CDNA) | 0.8 | $14M | -18% | 759k | 18.84 |
|
| Upwork (UPWK) | 0.8 | $14M | +82% | 720k | 19.82 |
|
| Magna Intl Inc cl a (MGA) | 0.7 | $14M | NEW | 256k | 53.30 |
|
| Ciena Corp Com New (CIEN) | 0.7 | $13M | -36% | 57k | 233.87 |
|
| Primoris Services (PRIM) | 0.7 | $13M | -29% | 106k | 124.14 |
|
| Novanta (NOVT) | 0.7 | $13M | NEW | 107k | 118.99 |
|
| Digitalbridge Group Cl A New (DBRG) | 0.7 | $13M | -84% | 825k | 15.34 |
|
| Virtu Finl Cl A (VIRT) | 0.7 | $13M | NEW | 376k | 33.32 |
|
| Honest (HNST) | 0.7 | $12M | -30% | 4.8M | 2.58 |
|
| Snap Cl A (SNAP) | 0.6 | $12M | NEW | 1.5M | 8.07 |
|
| Tecnoglass Ord Shs (TGLS) | 0.6 | $12M | +118% | 239k | 50.32 |
|
| MarineMax (HZO) | 0.6 | $12M | +24% | 487k | 24.23 |
|
| Transmedics Group (TMDX) | 0.6 | $12M | +40% | 97k | 121.65 |
|
| Core Natural Resources Com Shs (CNR) | 0.6 | $12M | NEW | 130k | 88.51 |
|
| Acm Resh Com Cl A (ACMR) | 0.6 | $11M | -29% | 286k | 39.45 |
|
| Sezzle (SEZL) | 0.6 | $11M | NEW | 168k | 63.48 |
|
| Guardant Health (GH) | 0.6 | $11M | NEW | 104k | 102.14 |
|
| Ranpak Holdings Corp Com Cl A (PACK) | 0.6 | $11M | +518% | 2.0M | 5.41 |
|
| Bio Rad Labs Cl A (BIO) | 0.6 | $10M | -26% | 34k | 302.99 |
|
| Digi International (DGII) | 0.6 | $10M | NEW | 238k | 43.29 |
|
| Zillow Group Cl A (ZG) | 0.5 | $10M | NEW | 150k | 68.23 |
|
| Repay Hldgs Corp Com Cl A (RPAY) | 0.5 | $10M | +27% | 2.8M | 3.65 |
|
| Ramaco Res Com Cl A (METC) | 0.5 | $10M | NEW | 562k | 18.00 |
|
| Sanmina (SANM) | 0.5 | $10M | NEW | 67k | 150.07 |
|
| Kura Sushi Usa Cl A Com (KRUS) | 0.5 | $10M | +13% | 191k | 52.33 |
|
| Exzeo Group Com Shs (XZO) | 0.5 | $9.8M | NEW | 405k | 24.25 |
|
| Dave Class A Com New (DAVE) | 0.5 | $9.7M | NEW | 44k | 221.41 |
|
| Take-Two Interactive Software (TTWO) | 0.5 | $9.6M | -13% | 38k | 256.03 |
|
| Mayville Engineering (MEC) | 0.5 | $9.6M | NEW | 513k | 18.72 |
|
| Candel Therapeutics (CADL) | 0.5 | $9.6M | +22% | 1.7M | 5.65 |
|
| Opera Sponsored Ads (OPRA) | 0.5 | $8.9M | -43% | 631k | 14.16 |
|
| Remitly Global (RELY) | 0.5 | $8.7M | NEW | 628k | 13.80 |
|
| Waters Corporation (WAT) | 0.5 | $8.5M | NEW | 22k | 379.83 |
|
| RadNet (RDNT) | 0.4 | $8.4M | -48% | 118k | 71.35 |
|
| Wix SHS (WIX) | 0.4 | $8.3M | -16% | 80k | 103.89 |
|
| Stewart Information Services Corporation (STC) | 0.4 | $8.3M | +15% | 118k | 70.26 |
|
| Procept Biorobotics Corp (PRCT) | 0.4 | $8.0M | NEW | 255k | 31.46 |
|
| Applied Optoelectronics (AAOI) | 0.4 | $8.0M | -58% | 229k | 34.86 |
|
| Open Lending Corp (LPRO) | 0.4 | $7.3M | +28% | 4.7M | 1.55 |
|
| Ermenegildo Zegna N V Ord Shs (ZGN) | 0.4 | $7.3M | -48% | 711k | 10.25 |
|
| Genedx Holdings Corp Com Cl A (WGS) | 0.4 | $7.3M | +26% | 56k | 130.06 |
|
| Nokia Corp Sponsored Adr (NOK) | 0.4 | $7.0M | NEW | 1.1M | 6.47 |
|
| Nextpower Class A Com (NXT) | 0.4 | $7.0M | NEW | 80k | 87.11 |
|
| Establishment Labs Holdings Ord (ESTA) | 0.4 | $6.9M | -38% | 95k | 72.88 |
|
| Qualys (QLYS) | 0.4 | $6.9M | NEW | 52k | 132.90 |
|
| Vnet Group Sponsored Ads A (VNET) | 0.4 | $6.8M | +42% | 807k | 8.46 |
|
| Meta Platforms Cl A (META) | 0.4 | $6.8M | -11% | 10k | 660.09 |
|
| Amplitude Com Cl A (AMPL) | 0.3 | $6.5M | NEW | 560k | 11.58 |
|
| Draftkings Com Cl A (DKNG) | 0.3 | $6.3M | -50% | 184k | 34.46 |
|
| Frequency Electronics (FEIM) | 0.3 | $6.1M | -44% | 113k | 53.84 |
|
| Dana Holding Corporation (DAN) | 0.3 | $6.0M | NEW | 252k | 23.76 |
|
| Willdan (WLDN) | 0.3 | $6.0M | +232% | 58k | 103.66 |
|
| Nu Skin Enterprises Cl A (NUS) | 0.3 | $5.7M | 597k | 9.62 |
|
|
| Sweetgreen Com Cl A (SG) | 0.3 | $5.7M | +166% | 848k | 6.76 |
|
| Forrester Research (FORR) | 0.3 | $5.7M | +37% | 706k | 8.12 |
|
| Douglas Elliman (DOUG) | 0.3 | $5.6M | 2.4M | 2.37 |
|
|
| Owlet Cl A New (OWLT) | 0.3 | $5.6M | NEW | 344k | 16.19 |
|
| Okeanis Eco Tankers Cor SHS (ECO) | 0.3 | $5.5M | NEW | 162k | 33.84 |
|
| Pulse Biosciences (PLSE) | 0.3 | $5.4M | +285% | 394k | 13.73 |
|
| Gigacloud Technology Class A Ord (GCT) | 0.3 | $5.4M | -37% | 138k | 39.28 |
|
| Vicor Corporation (VICR) | 0.3 | $5.3M | NEW | 49k | 109.60 |
|
| Park Aerospace Corp. Cmn Pke (PKE) | 0.3 | $5.2M | 245k | 21.34 |
|
|
| Green Dot Corp Cl A (GDOT) | 0.3 | $5.2M | -74% | 407k | 12.81 |
|
| Bandwidth Com Cl A (BAND) | 0.3 | $5.2M | -54% | 337k | 15.45 |
|
| eBay (EBAY) | 0.3 | $5.1M | NEW | 58k | 87.10 |
|
| Fabrinet SHS (FN) | 0.3 | $5.0M | -62% | 11k | 455.28 |
|
| Ies Hldgs (IESC) | 0.2 | $4.6M | NEW | 12k | 389.02 |
|
| Fulgent Genetics (FLGT) | 0.2 | $4.5M | NEW | 170k | 26.27 |
|
| Adeia (ADEA) | 0.2 | $4.4M | NEW | 256k | 17.25 |
|
| Olaplex Hldgs (OLPX) | 0.2 | $4.1M | -15% | 3.1M | 1.34 |
|
| Qiagen Nv Com Shs | 0.2 | $4.1M | NEW | 90k | 44.97 |
|
| Ambarella SHS (AMBA) | 0.2 | $3.8M | NEW | 54k | 70.84 |
|
| Similarweb SHS (SMWB) | 0.2 | $3.7M | -58% | 493k | 7.49 |
|
| Natera (NTRA) | 0.2 | $3.6M | 16k | 229.09 |
|
|
| Mobileye Global Common Class A (MBLY) | 0.2 | $3.6M | NEW | 342k | 10.44 |
|
| Sprout Social Com Cl A (SPT) | 0.2 | $3.4M | NEW | 302k | 11.27 |
|
| Mercury Computer Systems (MRCY) | 0.2 | $3.4M | +3% | 46k | 73.01 |
|
| Tapestry (TPR) | 0.2 | $3.3M | 26k | 127.77 |
|
|
| Oshkosh Corporation (OSK) | 0.2 | $3.3M | NEW | 26k | 125.63 |
|
| Regal-beloit Corporation (RRX) | 0.2 | $3.2M | NEW | 23k | 140.32 |
|
| Ouster Com New (OUST) | 0.2 | $3.1M | NEW | 145k | 21.64 |
|
| Quantum Corp (QMCO) | 0.2 | $3.1M | NEW | 477k | 6.45 |
|
| Personalis Ord (PSNL) | 0.2 | $3.0M | NEW | 379k | 7.96 |
|
| Microsoft Corporation (MSFT) | 0.2 | $2.9M | 6.0k | 483.62 |
|
|
| Super Micro Computer Com New (SMCI) | 0.2 | $2.8M | -67% | 97k | 29.27 |
|
| Indie Semiconductor Class A Com (INDI) | 0.1 | $2.4M | NEW | 672k | 3.53 |
|
| Tecogen Com New (TGEN) | 0.1 | $2.2M | -25% | 446k | 4.94 |
|
| Alphabet Cap Stk Cl C (GOOG) | 0.1 | $2.2M | 7.0k | 313.80 |
|
|
| Lumentum Hldgs (LITE) | 0.1 | $2.1M | -88% | 5.8k | 368.59 |
|
| Alexandria Real Estate Equities (ARE) | 0.1 | $2.1M | NEW | 44k | 48.94 |
|
| Gates Indl Corp Ord Shs (GTES) | 0.1 | $2.1M | -73% | 97k | 21.47 |
|
| Xpeng Ads (XPEV) | 0.1 | $2.0M | NEW | 97k | 20.28 |
|
| Sandridge Energy Com New (SD) | 0.1 | $1.9M | NEW | 134k | 14.43 |
|
| Oracle Corporation (ORCL) | 0.1 | $1.9M | 9.6k | 194.91 |
|
|
| Sharkninja Com Shs (SN) | 0.1 | $1.8M | NEW | 16k | 111.90 |
|
| Casella Waste Sys Cl A (CWST) | 0.1 | $1.5M | 15k | 97.94 |
|
|
| Vertiv Holdings Com Cl A (VRT) | 0.1 | $1.5M | -91% | 9.0k | 162.01 |
|
| Planet Labs Pbc Com Cl A (PL) | 0.1 | $1.4M | -89% | 69k | 19.72 |
|
| Talos Energy (TALO) | 0.1 | $1.3M | NEW | 119k | 11.02 |
|
| Solaris Energy Infras Com Cl A (SEI) | 0.0 | $895k | -94% | 20k | 45.97 |
|
| Reddit Cl A (RDDT) | 0.0 | $818k | -89% | 3.6k | 229.87 |
|
| Everus Constr Group (ECG) | 0.0 | $747k | -88% | 8.7k | 85.56 |
|
| L3harris Technologies (LHX) | 0.0 | $633k | -57% | 2.2k | 293.57 |
|
| Shoals Technologies Group In Cl A (SHLS) | 0.0 | $619k | -91% | 73k | 8.50 |
|
| GDS HLDGS Sponsored Ads (GDS) | 0.0 | $536k | +9% | 15k | 34.90 |
|
| Newell Rubbermaid (NWL) | 0.0 | $469k | NEW | 126k | 3.72 |
|
| Amplify Energy Corp (AMPY) | 0.0 | $407k | NEW | 89k | 4.57 |
|
| Claros Mtg Tr Common Stock (CMTG) | 0.0 | $366k | NEW | 120k | 3.06 |
|
| Weave Communications (WEAV) | 0.0 | $361k | NEW | 48k | 7.59 |
|
| Lincoln Educational Services Corporation (LINC) | 0.0 | $338k | -95% | 14k | 24.15 |
|
| Crescent Energy Company Cl A Com (CRGY) | 0.0 | $335k | NEW | 40k | 8.39 |
|
| Harvard Bioscience (HBIO) | 0.0 | $274k | NEW | 410k | 0.67 |
|
Past Filings by Portolan Capital Management
SEC 13F filings are viewable for Portolan Capital Management going back to 2010
- 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
- Portolan Capital Management 2022 Q1 filed May 16, 2022