Portolan Capital Management, LLC
13F Reported Value
ⓘ$1.9B
Holdings
144
Latest Filing
2026-03-31
Filing Quarter
Q1 2026
Portfolio Overview
Portolan Capital Management, LLC disclosed 144 positions worth $1.9B in its Form 13F-HR for Q1 2026, led by $MOD (MODINE MANUFACTURING CO) at 4.8% of the equity portfolio, followed by $TTMI and $CLS. During the quarter the fund opened 30 new positions and exited 41 — including a new stake in $PARR and a full exit from $FSLR. The portfolio is most concentrated in Technology (37.4% of disclosed assets). All figures are sourced directly from Portolan Capital Management, LLC’s Form 13F-HR filing with the SEC under CIK 1350290.
AI Fund Analysis
ConcentratingSector Allocation
AUM History
Top Equity Holdings by Value
Quarterly Activity — Q1 2026
Click any card to unlockTop Holdings
- 48.8#1,539
Quality
$89.3M412,092 sh - 59.0#951
Quality
$70.9M727,494 sh - 69.0#387
Quality
$55.7M197,863 sh - 62.6
Quality
$53.3M1,211,887 sh - 62.0
Quality
$48.6M423,442 sh - 33.0
Quality
$44.3M1,019,868 sh - 54.3
Quality
$43.5M693,834 sh - 69.5
Quality
$41.0M75,830 sh - —
Quality
$40.8M366,429 sh - 42.1
Quality
$38.1M799,998 sh
| Company | Quality | Value | Shares |
|---|---|---|---|
 MODINE MANUFACTURING CO$MOD | 48.8#1,539 | $89.3M | 412,092 |
 TTM TECHNOLOGIES INC$TTMI | 59.0#951 | $70.9M | 727,494 |
 CELESTICA INC$CLS | 69.0#387 | $55.7M | 197,863 |
 Virtu Financial, Inc.$VIRT | 62.6 | $53.3M | 1,211,887 |
 AKAMAI TECHNOLOGIES INC$AKAM | 62.0 | $48.6M | 423,442 |
 Vishay Precision Group, Inc.$VPG | 33.0 | $44.3M | 1,019,868 |
 PAR PACIFIC HOLDINGS, INC.$PARR | 54.3 | $43.5M | 693,834 |
 POWELL INDUSTRIES INC$POWL | 69.5 | $41.0M | 75,830 |
 Baidu, Inc.$BIDU | — | $40.8M | 366,429 |
 PBF Energy Inc.$PBF | 42.1 | $38.1M | 799,998 |
Unlock AI quality scores for every holding
32-signal composite ranking on each of Portolan Capital Management, LLC's 144 positions.
Showing top 10 of 144 holdings.
Sector Allocation
Technology
$702.4M
Industrials
$347.7M
Healthcare
$201.6M
Energy
$181.9M
Consumer Discretionary
$165.1M
Financials
$130.2M
Real Estate
$40.7M
Consumer Staples
$32.2M
Full Holdings — Portolan Capital Management, LLC (Q1 2026)
All 144 disclosed positions from the latest Form 13F-HR, with quarter-over-quarter share changes and 13F Pro quality scores. Sourced from SEC EDGAR.
| # | Ticker | Company | Value | Weight | QoQ | Quality |
|---|---|---|---|---|---|---|
| 1 | $MOD | MODINE MANUFACTURING CO | $89.3M | 4.8% | -23% | 48.8 |
| 2 | $TTMI | TTM TECHNOLOGIES INC | $70.9M | 3.8% | -37% | 59 |
| 3 | $CLS | CELESTICA INC | $55.7M | 3.0% | +15% | 69 |
| 4 | $VIRT | Virtu Financial, Inc. | $53.3M | 2.8% | +222% | 62.6 |
| 5 | $AKAM | AKAMAI TECHNOLOGIES INC | $48.6M | 2.6% | -19% | 62 |
| 6 | $VPG | Vishay Precision Group, Inc. | $44.3M | 2.4% | +16% | 33 |
| 7 | $PARR | PAR PACIFIC HOLDINGS, INC. | $43.5M | 2.3% | NEW | 54.3 |
| 8 | $POWL | POWELL INDUSTRIES INC | $41.0M | 2.2% | -4% | 69.5 |
| 9 | $BIDU | Baidu, Inc. | $40.8M | 2.2% | +39% | — |
| 10 | $PBF | PBF Energy Inc. | $38.1M | 2.0% | NEW | 42.1 |
| 11 |  $UTHR | UNITED THERAPEUTICS Corp | $37.6M | 2.0% | +73% | 80.1 |
| 12 |  $REAX | Real Brokerage Inc | $36.3M | 1.9% | +35% | 41.9 |
| 13 |  $GOOS | Canada Goose Holdings Inc. | $35.3M | 1.9% | +50% | — |
| 14 |  $CRGY | Crescent Energy Co | $35.1M | 1.9% | +6419% | 57.4 |
| 15 |  $CSTL | CASTLE BIOSCIENCES INC | $33.1M | 1.8% | -22% | 37.7 |
| 16 |  $LNTH | Lantheus Holdings, Inc. | $31.7M | 1.7% | -12% | 66.9 |
| 17 |  $CLBT | Cellebrite DI Ltd. | $30.1M | 1.6% | +69% | — |
| 18 |  $LUXE | LuxExperience B.V. | $29.9M | 1.6% | +40% | — |
| 19 |  $FLEX | FLEX LTD. | $29.0M | 1.5% | -5% | — |
| 20 |  $FN | Fabrinet | $28.6M | 1.5% | +403% | 72.4 |
| 21 |  $ECO | Okeanis Eco Tankers Corp. | $27.3M | 1.4% | +233% | — |
| 22 |  $TLN | Talen Energy Corp | $26.0M | 1.4% | +9% | 66.5 |
| 23 |  $SMTC | SEMTECH CORP | $25.6M | 1.4% | -35% | 54.5 |
| 24 |  $CNR | Core Natural Resources, Inc. | $24.8M | 1.3% | +82% | 51.8 |
| 25 |  $MUSA | Murphy USA Inc. | $23.8M | 1.3% | NEW | 53.2 |
| 26 |  $BIIB | BIOGEN INC. | $21.7M | 1.2% | +39% | 65.6 |
| 27 |  $KRUS | KURA SUSHI USA, INC. | $21.0M | 1.1% | +58% | 41.4 |
| 28 |  $QLYS | QUALYS, INC. | $21.0M | 1.1% | +361% | 73.4 |
| 29 |  $JBL | JABIL INC | $20.5M | 1.1% | +9% | 51.9 |
| 30 |  $CRCL | Circle Internet Group, Inc. | $20.4M | 1.1% | NEW | 44.8 |
| 31 |  $DHT | DHT Holdings, Inc. | $19.9M | 1.1% | NEW | — |
| 32 |  $NOK | NOKIA CORP | $19.2M | 1.0% | +122% | — |
| 33 |  $ALNT | ALLIENT INC | $19.1M | 1.0% | +7% | 45.5 |
| 34 |  $PRIM | Primoris Services Corp | $18.7M | 1.0% | +24% | 62.3 |
| 35 |  $DAVE | Dave Inc./DE | $18.4M | 1.0% | +140% | 78.1 |
| 36 |  $KTOS | KRATOS DEFENSE & SECURITY SOLUTIONS, INC. | $18.3M | 1.0% | -12% | 48 |
| 37 |  $MAMA | Mama's Creations, Inc. | $18.1M | 1.0% | -6% | 55.1 |
| 38 |  $ADEA | Adeia Inc. | $17.5M | 0.9% | +185% | 57.6 |
| 39 |  $UPWK | UPWORK, INC | $17.2M | 0.9% | +118% | 67.4 |
| 40 |  $PLSE | PULSE BIOSCIENCES, INC. | $15.8M | 0.8% | +86% | — |
| 41 |  $PRCH | Porch Group, Inc. | $15.4M | 0.8% | +3% | 38.7 |
| 42 |  $HAFN | Hafnia Ltd | $14.8M | 0.8% | NEW | — |
| 43 |  $MEC | Mayville Engineering Company, Inc. | $14.7M | 0.8% | +60% | 34 |
| 44 |  $CADL | Candel Therapeutics, Inc. | $14.2M | 0.8% | +71% | — |
| 45 |  $LASR | NLIGHT, INC. | $12.9M | 0.7% | -62% | 41.3 |
| 46 |  $GENI | Genius Sports Ltd | $12.4M | 0.7% | -5% | — |
| 47 |  $AS | Amer Sports, Inc. | $11.8M | 0.6% | NEW | 71 |
| 48 |  $EBAY | EBAY INC | $11.5M | 0.6% | +117% | 69.3 |
| 49 |  $PKE | PARK AEROSPACE CORP | $11.2M | 0.6% | +68% | 68.5 |
| 50 |  $ENVA | Enova International, Inc. | $11.0M | 0.6% | -17% | 76.8 |
| 51 |  $RELY | Remitly Global, Inc. | $10.9M | 0.6% | +11% | 66 |
| 52 |  $EVLV | Evolv Technologies Holdings, Inc. | $10.9M | 0.6% | NEW | 34.7 |
| 53 |  $WRBY | Warby Parker Inc. | $10.5M | 0.6% | -59% | 51.2 |
| 54 |  $BELFA | BEL FUSE INC /NJ | $10.5M | 0.6% | -62% | 60.7 |
| 55 |  $LPTH | LIGHTPATH TECHNOLOGIES INC | $10.4M | 0.6% | -55% | 33.2 |
| 56 |  $QTRX | Quanterix Corp | $10.4M | 0.6% | -35% | 22.2 |
| 57 |  $RRX | REGAL REXNORD CORP | $10.1M | 0.5% | +134% | 53.8 |
| 58 |  $AMSC | AMERICAN SUPERCONDUCTOR CORP /DE/ | $10.0M | 0.5% | NEW | 68.7 |
| 59 |  $TWLO | TWILIO INC | $9.4M | 0.5% | NEW | 59.5 |
| 60 |  $FOUR | Shift4 Payments, Inc. | $9.4M | 0.5% | -54% | 60 |
| 61 |  $HNST | Honest Company, Inc. | $9.0M | 0.5% | -37% | 46.3 |
| 62 |  $FORR | FORRESTER RESEARCH, INC. | $8.7M | 0.5% | +118% | 28.9 |
| 63 |  $LPRO | Open Lending Corp | $8.6M | 0.5% | +46% | 20 |
| 64 |  $MOG-A | MOOG INC. | $8.6M | 0.5% | NEW | 66.2 |
| 65 |  $VECO | VEECO INSTRUMENTS INC | $8.6M | 0.5% | NEW | 40.7 |
| 66 |  $HQY | HEALTHEQUITY, INC. | $8.5M | 0.5% | NEW | 72.3 |
| 67 |  $ELF | e.l.f. Beauty, Inc. | $8.3M | 0.4% | -29% | 53.4 |
| 68 |  $DGII | DIGI INTERNATIONAL INC | $8.2M | 0.4% | -28% | 56.3 |
| 69 |  $GHM | GRAHAM CORP | $8.2M | 0.4% | NEW | 53.6 |
| 70 |  $ZETA | Zeta Global Holdings Corp. | $7.7M | 0.4% | -63% | 53.6 |
| 71 |  $ESI | Element Solutions Inc | $7.6M | 0.4% | NEW | 63.1 |
| 72 |  $RPAY | Repay Holdings Corp | $7.4M | 0.4% | +2% | 33 |
| 73 |  $ZGN | Ermenegildo Zegna N.V. | $7.4M | 0.4% | +0% | — |
| 74 |  $WLDN | Willdan Group, Inc. | $7.2M | 0.4% | +63% | 61.5 |
| 75 |  $ACLS | AXCELIS TECHNOLOGIES INC | $7.2M | 0.4% | NEW | 50.3 |
| 76 |  $CIEN | CIENA CORP | $7.2M | 0.4% | -67% | 70.7 |
| 77 |  $PACK | Ranpak Holdings Corp. | $7.0M | 0.4% | -0% | 29 |
| 78 |  $VNET | VNET Group, Inc. | $6.9M | 0.4% | +2% | — |
| 79 |  $ONON | On Holding AG | $6.9M | 0.4% | NEW | — |
| 80 |  $NXT | Nextpower Inc. | $6.8M | 0.4% | -29% | 74.8 |
| 81 |  $FEIM | FREQUENCY ELECTRONICS INC | $6.6M | 0.3% | +33% | 47 |
| 82 |  $WGS | GeneDx Holdings Corp. | $6.6M | 0.3% | +84% | 38.6 |
| 83 |  $TTWO | TAKE TWO INTERACTIVE SOFTWARE INC | $6.4M | 0.3% | -15% | 47.2 |
| 84 |  $PRCT | PROCEPT BioRobotics Corp | $6.3M | 0.3% | -1% | 34.8 |
| 85 |  $NOG | NORTHERN OIL & GAS, INC. | $6.0M | 0.3% | NEW | 45.3 |
| 86 |  $CDNA | CareDx, Inc. | $5.9M | 0.3% | -55% | 44.8 |
| 87 |  $BL | BLACKLINE, INC. | $5.9M | 0.3% | NEW | 49.9 |
| 88 |  $META | Meta Platforms, Inc. | $5.9M | 0.3% | -1% | 80.9 |
| 89 |  $CELH | Celsius Holdings, Inc. | $5.8M | 0.3% | NEW | 63 |
| 90 |  $DBRG | DigitalBridge Group, Inc. | $5.8M | 0.3% | -55% | 52.9 |
| 91 |  $IESC | IES Holdings, Inc. | $5.7M | 0.3% | +1% | 73.5 |
| 92 |  $TSEM | TOWER SEMICONDUCTOR LTD | $5.6M | 0.3% | -78% | — |
| 93 |  $AMBA | AMBARELLA INC | $5.6M | 0.3% | +100% | 38.5 |
| 94 |  $CENX | CENTURY ALUMINUM CO | $5.6M | 0.3% | NEW | 67 |
| 95 |  $TALO | TALOS ENERGY INC. | $5.4M | 0.3% | +189% | 49.2 |
| 96 |  $TLX | Telix Pharmaceuticals Ltd | $5.2M | 0.3% | NEW | — |
| 97 |  $MIAX | MIAMI INTERNATIONAL HOLDINGS, INC. | $5.0M | 0.3% | NEW | — |
| 98 |  $AVAV | AeroVironment Inc | $4.9M | 0.3% | -65% | 42.1 |
| 99 |  $VIAV | VIAVI SOLUTIONS INC. | $4.9M | 0.3% | NEW | 42.9 |
| 100 |  $XPEV | XPENG INC. | $4.7M | 0.3% | +184% | — |
| 101 |  $PSNL | Personalis, Inc. | $4.7M | 0.3% | +94% | 15.7 |
| 102 |  $MBLY | Mobileye Global Inc. | $4.7M | 0.3% | +98% | 38.8 |
| 103 |  $IIIV | i3 Verticals, Inc. | $4.6M | 0.3% | -69% | 46.1 |
| 104 |  $ONTO | ONTO INNOVATION INC. | $4.6M | 0.2% | NEW | 66.5 |
| 105 |  $PUMP | ProPetro Holding Corp. | $4.5M | 0.2% | NEW | 39.3 |
| 106 |  $SEZL | Sezzle Inc. | $4.4M | 0.2% | -58% | 80.9 |
| 107 |  $NOVT | NOVANTA INC | $4.4M | 0.2% | -65% | 50.5 |
| 108 |  $DOUG | Douglas Elliman Inc. | $4.4M | 0.2% | +13% | 35 |
| 109 |  $VICR | VICOR CORP | $4.3M | 0.2% | -45% | 63.6 |
| 110 |  $LITE | Lumentum Holdings Inc. | $4.1M | 0.2% | +0% | 63.4 |
| 111 |  $BIO | BIO-RAD LABORATORIES, INC. | $4.0M | 0.2% | -59% | 40.3 |
| 112 |  $SANM | SANMINA CORP | $3.5M | 0.2% | -59% | 61 |
| 113 |  $FPS | Forgent Power Solutions, Inc. | $3.5M | 0.2% | NEW | — |
| 114 |  $DPRO | Draganfly Inc. | $3.4M | 0.2% | NEW | 26.2 |
| 115 |  $GDOT | GREEN DOT CORP | $3.4M | 0.2% | -27% | 53.1 |
| 116 |  $ACMR | ACM Research, Inc. | $3.3M | 0.2% | -71% | 54.8 |
| 117 |  $SPT | Sprout Social, Inc. | $3.2M | 0.2% | +85% | 44.8 |
| 118 |  $XZO | Exzeo Group, Inc. | $3.1M | 0.2% | -48% | — |
| 119 |  $OSK | OSHKOSH CORP | $2.7M | 0.1% | -30% | 53 |
| 120 |  $AAOI | APPLIED OPTOELECTRONICS, INC. | $2.5M | 0.1% | -87% | 40.6 |
| 121 |  $AMPL | Amplitude, Inc. | $2.5M | 0.1% | -36% | 34.5 |
| 122 |  $TPR | TAPESTRY, INC. | $2.4M | 0.1% | -34% | 76.4 |
| 123 |  $GCT | GigaCloud Technology Inc | $2.4M | 0.1% | -62% | — |
| 124 |  $NTRA | Natera, Inc. | $2.3M | 0.1% | -27% | 46.4 |
| 125 |  $UCTT | Ultra Clean Holdings, Inc. | $2.1M | 0.1% | NEW | 36 |
| 126 |  $SD | SANDRIDGE ENERGY INC | $2.0M | 0.1% | -8% | 65.5 |
| 127 |  $FLGT | Fulgent Genetics, Inc. | $1.7M | 0.1% | -37% | 27.2 |
| 128 |  $KOS | Kosmos Energy Ltd. | $1.7M | 0.1% | NEW | — |
| 129 |  $GOOGL | Alphabet Inc. | $1.6M | 0.1% | -18% | 80.2 |
| 130 |  $SEI | Solaris Energy Infrastructure, Inc. | $1.6M | 0.1% | +43% | 56.9 |
| 131 |  $RDNT | RadNet, Inc. | $1.3M | 0.1% | -80% | 51.4 |
| 132 |  $PL | Planet Labs PBC | $1.3M | 0.1% | -31% | 42.2 |
| 133 |  $GH | Guardant Health, Inc. | $1.3M | 0.1% | -86% | 36.1 |
| 134 |  $CWST | CASELLA WASTE SYSTEMS INC | $1.2M | 0.1% | -1% | 48.6 |
| 135 |  $DAN | DANA Inc | $1.2M | 0.1% | -86% | 60.9 |
| 136 |  $TGEN | TECOGEN INC. | $1.1M | 0.1% | -1% | 24.3 |
| 137 |  $TMDX | TransMedics Group, Inc. | $1.1M | 0.1% | -89% | 70.1 |
| 138 |  $ECG | Everus Construction Group, Inc. | $1.0M | 0.1% | +0% | 67 |
| 139 |  $LHX | L3HARRIS TECHNOLOGIES, INC. /DE/ | $744,489 | 0.0% | +0% | 66.5 |
| 140 |  $GDS | GDS Holdings Ltd | $615,671 | 0.0% | -1% | — |
| 141 |  $DOMO | DOMO, INC. | $603,138 | 0.0% | -91% | 24.1 |
| 142 |  $LINC | LINCOLN EDUCATIONAL SERVICES CORP | $569,805 | 0.0% | +0% | 47.6 |
| 143 |  $ESTA | ESTABLISHMENT LABS HOLDINGS INC. | $543,555 | 0.0% | -90% | 26.7 |
| 144 |  $AMPY | Amplify Energy Corp. | $462,509 | 0.0% | -17% | 38.4 |
New Positions (30)
$PARR PAR PACIFIC HOLDINGS, INC.$43.5M$PBF PBF Energy Inc.$38.1M$MUSA Murphy USA Inc.$23.8M$CRCL Circle Internet Group, Inc.$20.4M$DHT DHT Holdings, Inc.$19.9M$HAFN Hafnia Ltd$14.8M$AS Amer Sports, Inc.$11.8M$EVLV Evolv Technologies Holdings, Inc.$10.9M$AMSC AMERICAN SUPERCONDUCTOR CORP /DE/$10.0M$TWLO TWILIO INC$9.4M$MOG-A MOOG INC.$8.6M$VECO VEECO INSTRUMENTS INC$8.6M$HQY HEALTHEQUITY, INC.$8.5M$GHM GRAHAM CORP$8.2M$ESI Element Solutions Inc$7.6MExited Positions (41)
$FSLR FIRST SOLAR, INC.
$FAF First American Financial Corp
$SPHR Sphere Entertainment Co.
$MRX Marex Group Ltd
$TECH BIO-TECHNE Corp
$FCX FREEPORT-MCMORAN INC
$MGA MAGNA INTERNATIONAL INC
$SNAP Snap Inc
$TGLS Tecnoglass Inc.
$HZO MARINEMAX INC
$Z ZILLOW GROUP, INC.
$METC Ramaco Resources, Inc.
$OPRA Opera Ltd
$WAT WATERS CORP /DE/
$WIX Wix.com Ltd.Browse Top Institutional Investors
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