Granahan Investment Management, LLC
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), Granahan Investment Management, LLC reported 146 stock positions worth $2.4 billion. Its top holding was Porch (PRCH) at 6.6% of the portfolio, followed by Genius Sports (GENI, 4.0%) and Oddity Tech Class A (ODD, 3.8%). Compared with Q2 2025, it opened 19 new positions, sold out of 26, added to 60 and reduced 66. The biggest buy was Cellebrite Di (CLBT, shares +1108%) and the biggest sale Marex UK (MRX, shares −49%).
- Most Recent 13F
- Q2 2026
- Location
- WALTHAM, MA
- CIK
- 0001026710
- Portfolio Value
- $2.4B (Q3 2025)
- SEC Filing
- 0001398344-25-020897 ↗ filed Nov 14, 2025
Holdings Value
Holdings 146 stocks · $2.4B
| PRCH Porch Group Inc. | 6.62% | 9,636,692 | $161.7M | Reduce -17.1% |
| GENI Genius Sports Ltd. | 4.04% | 7,977,172 | $98.8M | Reduce -4.3% |
| ODD Oddity Tech Ltd. Class A | 3.84% | 1,506,457 | $93.9M | Add +11.2% |
| MGNI Magnite Inc. | 3.45% | 3,873,179 | $84.4M | Add +6.3% |
| VCTR Victory Capital Holding - A | 3.18% | 1,198,560 | $77.6M | Add +0.3% |
| FIX Comfort Systems USA Inc. | 3.13% | 92,772 | $76.6M | Add +35.2% |
| INDI Indie Semiconductor Inc. Class A | 2.91% | 17,474,795 | $71.1M | Reduce -10.3% |
| CRS Carpenter Technology | 2.71% | 269,437 | $66.2M | Add +16.3% |
| AXON Axon Enterprise Inc. | 2.28% | 77,451 | $55.6M | Reduce -7.4% |
| LEU Centrus Energy Corp. Class A | 2.14% | 168,660 | $52.3M | Reduce -18.4% |
| SRAD Sportradar Group AG-A | 2.09% | 1,893,741 | $50.9M | Reduce -17.6% |
| CLBT Cellebrite Di Ltd. | 1.99% | 2,629,299 | $48.7M | Add +1108.5% |
| LTH Life Time Group Holdings Inc. | 1.91% | 1,693,195 | $46.7M | Add +1.4% |
| SMTC Semtech Corp. | 1.88% | 641,492 | $45.8M | Reduce -35.3% |
| TOST Toast Inc. Class A | 1.85% | 1,237,612 | $45.2M | Reduce -23.2% |
| FTAI Ftai Aviation Ltd. | 1.83% | 267,372 | $44.6M | Add +114.1% |
| GLBE Global-E Online Ltd. | 1.79% | 1,221,221 | $43.7M | Add +30.8% |
| SPSC SPS Commerce Inc. | 1.69% | 396,780 | $41.3M | Add +6.5% |
| KRUS Kura Sushi USA Inc. Class A | 1.63% | 671,012 | $39.9M | Add +125.4% |
| COMP Compass Inc. Class A | 1.58% | 4,806,314 | $38.6M | Add +7.8% |
| APPS Digital Turbine Inc. | 1.50% | 5,713,937 | $36.6M | Add +77.2% |
| MRX Marex UK Holdings Ltd. filed as MAREX GROUP PLC | 1.45% | 1,054,954 | $35.5M | Reduce -49.2% |
| PHR Phreesia Inc. | 1.33% | 1,380,626 | $32.5M | Add +6.0% |
| NXT Nextpower Inc. filed as NEXTRACKER INC | 1.26% | 415,166 | $30.7M | Add +219.8% |
| AMRC Ameresco Inc. Class A | 1.22% | 890,072 | $29.9M | Add +108.3% |
| CWST Casella Waste Systems Inc. Class A | 1.22% | 314,344 | $29.8M | Add +0.6% |
| ACHR Archer Aviation Inc. Class A | 1.15% | 2,940,100 | $28.2M | Reduce -9.3% |
| MOD Modine Manufacturing Co. | 1.09% | 186,914 | $26.6M | Add +76.2% |
| KRNT Kornit Digital Ltd. | 1.08% | 1,955,150 | $26.4M | Add +6.9% |
| FWRG First Watch Restaurant Group | 1.07% | 1,667,332 | $26.1M | Add +1.2% |
| STEP Stepstone Group Inc. Class A | 1.02% | 381,455 | $24.9M | Add +176.5% |
| RMBS Rambus Inc. | 1.02% | 238,443 | $24.8M | Add +83.3% |
| ZETA Zeta Global Holdings Corp. Class A | 1.01% | 1,244,466 | $24.7M | Add +65.3% |
| CSGP Costar Group Inc. | 0.93% | 270,166 | $22.8M | Reduce -10.2% |
| DSGX The Descartes Systems Grp | 0.83% | 215,944 | $20.3M | Reduce -39.3% |
| SIMO Silicon Motion Technol-ADR | 0.81% | 207,758 | $19.7M | Add +59.7% |
| RBC RBC Bearings Inc. | 0.73% | 45,850 | $17.9M | Reduce -26.0% |
| ENVX Enovix Corp. | 0.71% | 1,749,649 | $17.4M | Add +17.5% |
| GTES Gates Industrial Corp. UK Ltd. | 0.69% | 682,310 | $16.9M | Reduce -26.5% |
| TRNS Transcat Inc. | 0.69% | 228,565 | $16.7M | Reduce -0.0% |
| FIGR Figure Technology Solut Class A | 0.68% | 458,594 | $16.7M | New |
| STKL Sunopta Inc. | 0.65% | 2,728,251 | $16.0M | Reduce -25.2% |
| EXAS Exact Sciences Corp. | 0.63% | 281,918 | $15.4M | Reduce -12.6% |
| SIBN Si-Bone Inc. | 0.63% | 1,039,649 | $15.3M | Reduce -17.8% |
| FOUR SHIFT4 Payments Inc. Class A | 0.62% | 196,810 | $15.2M | Reduce -23.4% |
| TCBI Texas Capital Bancshares Inc. | 0.59% | 169,790 | $14.4M | Reduce -6.7% |
| KIDS Orthopediatrics Corp. | 0.58% | 759,951 | $14.1M | Reduce -21.4% |
| ELF Elf Beauty Inc. | 0.54% | 98,837 | $13.1M | Add +12.2% |
| TSEM Tower Semiconductor Ltd. | 0.53% | 178,188 | $12.9M | Add +42.6% |
| NTNX Nutanix Inc. Class A | 0.53% | 173,109 | $12.9M | Reduce -10.3% |
| BELFB Bel Fuse Inc. Class B | 0.50% | 87,310 | $12.3M | Reduce -19.8% |
| CRDO Credo Technology Group Holdi | 0.50% | 83,925 | $12.2M | Add +93.6% |
| CECO Ceco Environmental Corp. | 0.49% | 234,699 | $12.0M | Reduce -33.3% |
| QXO Qxo Inc. | 0.48% | 620,819 | $11.8M | Add +1.3% |
| MTRN Materion Corp. | 0.47% | 94,276 | $11.4M | Reduce -22.1% |
| HUBS HubSpot Inc. | 0.46% | 24,057 | $11.3M | Reduce -35.6% |
| KNSA Kiniksa Pharmaceuticals Inte | 0.45% | 283,571 | $11.0M | Reduce -8.8% |
| ALHC Alignment Healthcare Inc. | 0.41% | 580,729 | $10.1M | Reduce -22.3% |
| BLFS Biolife Solutions Inc. | 0.41% | 392,096 | $10.0M | Reduce -39.0% |
| AGYS Agilysys Inc. | 0.41% | 94,224 | $9.9M | Add +288.5% |
| NCLH Norwegian Cruise Line Holdin | 0.41% | 401,759 | $9.9M | Reduce -33.1% |
| OKTA Okta Inc. | 0.40% | 105,403 | $9.7M | Add +45.5% |
| ONTO Onto Innovation Inc. | 0.39% | 74,122 | $9.6M | Add +119.6% |
| VRNS Varonis Systems Inc. | 0.39% | 164,132 | $9.4M | Add +12.1% |
| RGEN Repligen Corp. | 0.38% | 69,871 | $9.3M | Reduce -48.3% |
| LENZ Lenz Therapeutics Inc. | 0.36% | 191,397 | $8.9M | Add +4.4% |
| JBTM JBT Marel Corp. | 0.36% | 63,365 | $8.9M | Reduce -21.4% |
| VECO Veeco Instruments Inc. | 0.36% | 292,247 | $8.9M | Reduce -23.8% |
| SN Sharkninja Inc. | 0.36% | 85,589 | $8.8M | Reduce -3.2% |
| KVYO Klaviyo Inc. Class A | 0.35% | 310,879 | $8.6M | Reduce -35.2% |
| BBIO Bridgebio Pharma Inc. | 0.34% | 161,278 | $8.4M | Add +95.0% |
| CVLT Commvault Systems Inc. | 0.32% | 41,879 | $7.9M | Add +287.9% |
| FROG Jfrog Ltd. | 0.32% | 164,475 | $7.8M | Reduce -30.6% |
| SLNO Soleno Therapeutics Inc. | 0.30% | 109,253 | $7.4M | Add +82.2% |
| EXLS Exlservice Holdings Inc. | 0.30% | 165,993 | $7.3M | Add +92.0% |
| VERX Vertex Inc. Class A | 0.29% | 289,309 | $7.2M | Add +431.5% |
| ALKT Alkami Technology Inc. | 0.27% | 270,164 | $6.7M | New |
| KNSL Kinsale Capital Group Inc. | 0.27% | 15,622 | $6.6M | Add +3.1% |
| ACVA Acv Auctions Inc. Class A | 0.26% | 651,344 | $6.5M | Reduce -58.5% |
| AIP Arteris Inc. | 0.26% | 621,625 | $6.3M | Add +725.7% |
| MRUS Merus NV | 0.26% | 66,208 | $6.2M | Reduce -17.9% |
| RCUS Arcus Biosciences Inc. | 0.25% | 455,596 | $6.2M | Reduce -7.1% |
| SNDX Syndax Pharmaceuticals Inc. | 0.25% | 396,336 | $6.1M | Reduce -60.0% |
| BOOT Boot Barn Holdings Inc. | 0.25% | 36,656 | $6.1M | Add +43.8% |
| STOK Stoke Therapeutics Inc. | 0.24% | 253,899 | $6.0M | Reduce -52.3% |
| NTLA Intellia Therapeutics Inc. | 0.24% | 342,586 | $5.9M | Reduce -62.5% |
| ZYME Zymeworks Inc. | 0.24% | 345,331 | $5.9M | Reduce -9.3% |
| NPKI NPK International Inc. | 0.23% | 499,940 | $5.7M | Reduce -24.0% |
| RVMD Revolution Medicines Inc. | 0.23% | 118,692 | $5.5M | Reduce -2.5% |
| EWTX Edgewise Therapeutics Inc. | 0.23% | 339,617 | $5.5M | Reduce -16.2% |
| ADTN Adtran Holdings Inc. | 0.22% | 582,490 | $5.5M | Add +190.8% |
| LITE Lumentum Holdings Inc. | 0.22% | 32,881 | $5.4M | New |
| APGE Apogee Therapeutics Inc. | 0.22% | 132,400 | $5.3M | Add +1.0% |
| CERT Certara Inc. | 0.21% | 425,999 | $5.2M | Add +5.2% |
| POWL Powell Industries Inc. | 0.21% | 16,764 | $5.1M | Reduce -62.1% |
| NVMI Nova Ltd. | 0.21% | 15,728 | $5.0M | Reduce -42.9% |
| RYTM Rhythm Pharmaceuticals Inc. | 0.21% | 49,728 | $5.0M | Add +20.8% |
| IMNM Immunome Inc. | 0.20% | 426,219 | $5.0M | Add +8.5% |
| VKTX Viking Therapeutics Inc. | 0.20% | 189,529 | $5.0M | Reduce -37.9% |
| EYPT Eyepoint Inc. | 0.20% | 347,892 | $5.0M | Add +2.0% |
Portfolio Sells Q2 2025 → Q3 2025
| MRX Marex UK Holdings Ltd. | Reduce -49.2% | 1.45% | −1.89 |
| TOST Toast Inc. Class A | Reduce -23.2% | 1.85% | −1.06 |
| CRCL Circle Internet Group Inc. | Sold out | 0.00% | −1.02 |
| ACVA Acv Auctions Inc. Class A | Reduce -58.5% | 0.26% | −0.77 |
| PAR Par Technology Corp. | Sold out | 0.00% | −0.74 |
| SG Sweetgreen Inc. Class A | Reduce -82.3% | 0.07% | −0.66 |
| DSGX The Descartes Systems Grp | Reduce -39.3% | 0.83% | −0.64 |
| PCTY Paylocity Holding Corp. | Sold out | 0.00% | −0.60 |
| P Everpure Inc. Class A | Sold out | 0.00% | −0.59 |
| AXON Axon Enterprise Inc. | Reduce -7.4% | 2.28% | −0.54 |
| SRAD Sportradar Group AG-A | Reduce -17.6% | 2.09% | −0.54 |
| ETOR Etoro Group Ltd. Class A | Sold out | 0.00% | −0.54 |
| SPT Sprout Social Inc. Class A | Sold out | 0.00% | −0.44 |
| HQY Healthequity Inc. | Sold out | 0.00% | −0.43 |
| FOUR SHIFT4 Payments Inc. Class A | Reduce -23.4% | 0.62% | −0.41 |
| INSM Insmed Inc. | Reduce -88.4% | 0.08% | −0.40 |
| WSC Willscot Holdings Corp. | Reduce -60.0% | 0.17% | −0.39 |
| HUBS HubSpot Inc. | Reduce -35.6% | 0.46% | −0.39 |
| SIBN Si-Bone Inc. | Reduce -17.8% | 0.63% | −0.34 |
| CYBR Cyberark Software Ltd./Israel | Sold out | 0.00% | −0.34 |
| KVYO Klaviyo Inc. Class A | Reduce -35.2% | 0.35% | −0.30 |
| RGEN Repligen Corp. | Reduce -48.3% | 0.38% | −0.30 |
| PTC PTC Inc. | Sold out | 0.00% | −0.30 |
| ALAB Astera Labs Inc. | Sold out | 0.00% | −0.29 |
| CORZ Core Scientific Inc. | Sold out | 0.00% | −0.29 |
| ACHR Archer Aviation Inc. Class A | Reduce -9.3% | 1.15% | −0.28 |
| CCOI Cogent Communications Holdin | Reduce -51.5% | 0.17% | −0.27 |
| KIDS Orthopediatrics Corp. | Reduce -21.4% | 0.58% | −0.27 |
| RBC RBC Bearings Inc. | Reduce -26.0% | 0.73% | −0.24 |
| KNF Knife River Corp. | Sold out | 0.00% | −0.23 |
| PRO Pros Holdings Inc. | Sold out | 0.00% | −0.22 |
| STKL Sunopta Inc. | Reduce -25.2% | 0.65% | −0.21 |
| QLYS Qualys Inc. | Sold out | 0.00% | −0.18 |
| GTES Gates Industrial Corp. UK Ltd. | Reduce -26.5% | 0.69% | −0.18 |
| CFLT Confluent Inc. Class A | Reduce -40.9% | 0.16% | −0.17 |
| POWL Powell Industries Inc. | Reduce -62.1% | 0.21% | −0.17 |
| XENE Xenon Pharmaceuticals Inc. | Reduce -63.6% | 0.14% | −0.16 |
| SMMT Summit Therapeutics Inc. | Sold out | 0.00% | −0.16 |
| BLFS Biolife Solutions Inc. | Reduce -39.0% | 0.41% | −0.15 |
| MLTX Moonlake Immunotherapeutics | Sold out | 0.00% | −0.15 |
| SPIR Spire Global Inc. | Sold out | 0.00% | −0.14 |
| SNDX Syndax Pharmaceuticals Inc. | Reduce -60.0% | 0.25% | −0.13 |
| MEC Mayville Engineering Co. Inc. | Reduce -29.9% | 0.20% | −0.13 |
| VKTX Viking Therapeutics Inc. | Reduce -37.9% | 0.20% | −0.13 |
| LSCC Lattice Semiconductor Corp. | Reduce -69.3% | 0.10% | −0.12 |
| CIEN Ciena Corp. | Reduce -69.5% | 0.15% | −0.12 |
| TRNS Transcat Inc. | Reduce -0.0% | 0.69% | −0.11 |
| CMCO Columbus McKinnon Corp. | Sold out | 0.00% | −0.11 |
| PRTA Prothena Corp. PLC | Sold out | 0.00% | −0.11 |
| NTLA Intellia Therapeutics Inc. | Reduce -62.5% | 0.24% | −0.11 |
Portfolio Buys Q2 2025 → Q3 2025
| CLBT Cellebrite Di Ltd. | Add +1108.5% | 1.99% | +1.85 |
| FIX Comfort Systems USA Inc. | Add +35.2% | 3.13% | +1.64 |
| FTAI Ftai Aviation Ltd. | Add +114.1% | 1.83% | +1.24 |
| NXT Nextpower Inc. | Add +219.8% | 1.26% | +0.97 |
| AMRC Ameresco Inc. Class A | Add +108.3% | 1.22% | +0.96 |
| APPS Digital Turbine Inc. | Add +77.2% | 1.50% | +0.72 |
| STEP Stepstone Group Inc. Class A | Add +176.5% | 1.02% | +0.71 |
| FIGR Figure Technology Solut Class A | New | 0.68% | +0.68 |
| RMBS Rambus Inc. | Add +83.3% | 1.02% | +0.68 |
| MOD Modine Manufacturing Co. | Add +76.2% | 1.09% | +0.66 |
| KRUS Kura Sushi USA Inc. Class A | Add +125.4% | 1.63% | +0.59 |
| ZETA Zeta Global Holdings Corp. Class A | Add +65.3% | 1.01% | +0.54 |
| GLBE Global-E Online Ltd. | Add +30.8% | 1.79% | +0.51 |
| COMP Compass Inc. Class A | Add +7.8% | 1.58% | +0.44 |
| SIMO Silicon Motion Technol-ADR | Add +59.7% | 0.81% | +0.41 |
| CRDO Credo Technology Group Holdi | Add +93.6% | 0.50% | +0.34 |
| TSEM Tower Semiconductor Ltd. | Add +42.6% | 0.53% | +0.31 |
| AGYS Agilysys Inc. | Add +288.5% | 0.41% | +0.29 |
| ALKT Alkami Technology Inc. | New | 0.27% | +0.27 |
| ONTO Onto Innovation Inc. | Add +119.6% | 0.39% | +0.25 |
| CVLT Commvault Systems Inc. | Add +287.9% | 0.32% | +0.25 |
| AIP Arteris Inc. | Add +725.7% | 0.26% | +0.23 |
| LITE Lumentum Holdings Inc. | New | 0.22% | +0.22 |
| VERX Vertex Inc. Class A | Add +431.5% | 0.29% | +0.22 |
| BBIO Bridgebio Pharma Inc. | Add +95.0% | 0.34% | +0.20 |
| LGND Ligand Pharmaceuticals | New | 0.18% | +0.18 |
| ADTN Adtran Holdings Inc. | Add +190.8% | 0.22% | +0.15 |
| LENZ Lenz Therapeutics Inc. | Add +4.4% | 0.36% | +0.15 |
| EXLS Exlservice Holdings Inc. | Add +92.0% | 0.30% | +0.15 |
| ARLO Arlo Technologies Inc. | New | 0.13% | +0.13 |
| CYTK Cytokinetics Inc. | New | 0.12% | +0.12 |
| XERS Xeris Biopharma Holdings Inc. | New | 0.12% | +0.12 |
| OWLT Owlet Inc. | Add +135.9% | 0.18% | +0.10 |
| CRS Carpenter Technology | Add +16.3% | 2.71% | +0.10 |
| ONT Onterris Inc. | New | 0.10% | +0.10 |
| OKTA Okta Inc. | Add +45.5% | 0.40% | +0.10 |
| CELC Celcuity Inc. | New | 0.10% | +0.10 |
| RYTM Rhythm Pharmaceuticals Inc. | Add +20.8% | 0.21% | +0.10 |
| DAVE Dave Inc. | New | 0.10% | +0.10 |
| SLNO Soleno Therapeutics Inc. | Add +82.2% | 0.30% | +0.10 |
| SRRK Scholar Rock Holding Corp. | Add +77.0% | 0.20% | +0.09 |
| NEXN Nexxen International Ltd. | New | 0.09% | +0.09 |
| BOOT Boot Barn Holdings Inc. | Add +43.8% | 0.25% | +0.09 |
| NTSK Netskope Inc. Class A | New | 0.09% | +0.09 |
| ELF Elf Beauty Inc. | Add +12.2% | 0.54% | +0.09 |
| ENVX Enovix Corp. | Add +17.5% | 0.71% | +0.09 |
| VRNS Varonis Systems Inc. | Add +12.1% | 0.39% | +0.08 |
| UTI Universal Technical Institut | Add +107.7% | 0.17% | +0.08 |
| VCTR Victory Capital Holding - A | Add +0.3% | 3.18% | +0.08 |
| BWXT BWX Technologies Inc. | New | 0.08% | +0.08 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 150 | $2.8B | PRCH, SIMO, FPS, INDI, VCTR |
| Q1 2026 | 149 | $2.1B | CRS, PRCH, FTAI, MOD, VCTR |
| Q4 2025 | 157 | $2.3B | PRCH, GENI, CRS, FTAI, VCTR |
| Q3 2025 | 146 | $2.4B | PRCH, GENI, ODD, MGNI, VCTR |
| Q2 2025 | 153 | $2.5B | PRCH, ODD, MGNI, GENI, MRX |
| Q1 2025 | 159 | $2.0B | PRCH, GENI, MRX, ODD, VCTR |
| Q4 2024 | 180 | $2.4B | AXON, VCTR, INDI, GENI, MRX |
| Q3 2024 | 187 | $2.5B | EVH, AXON, ZETA, INDI, TOST |
| Q2 2024 | 180 | $2.5B | INDI, ZETA, AXON, MGNI, SPT |
| Q1 2024 | 181 | $2.8B | INDI, SPT, AXON, ZETA, EVH |