Gagnon Securities LLC Top Holdings and 13F Report (2026) About Gagnon Securities LLCInvestment ActivityGagnon Securities LLC has $576.51 million in total holdings as of September 30, 2026.Gagnon Securities LLC owns shares of 84 different stocks, but just 24 companies or ETFs make up 80% of its holdings.Approximately 8.85% of the portfolio was purchased this quarter.About 13.28% of the portfolio was sold this quarter.This quarter, Gagnon Securities LLC has purchased 83 new stocks and bought additional shares in 36 stocks.Gagnon Securities LLC sold shares of 23 stocks and completely divested from 7 stocks this quarter.Largest Holdings CareDx $69,835,964GeneDx $37,327,333The Ensign Group $28,094,824Cheesecake Factory $22,719,843BioLife Solutions $20,671,968 Largest New Holdings this Quarter Y62132108 - Navigator $14,083,171 Holding112463104 - Brookdale Senior Living $8,005,265 Holding10948C107 - BrightView $7,483,930 Holding69932A204 - PARAMOUNT SKYDANCE CORP $1,119,762 Holding87877F103 - TECNOGLASS HOLDINGS INC $485,452 Holding Largest Purchases this Quarter Navigator 607,557 shares (about $14.08M)Brookdale Senior Living 739,175 shares (about $8.01M)BrightView 748,393 shares (about $7.48M)BlackLine 144,261 shares (about $3.83M)Vertex 284,161 shares (about $3.35M) Largest Sales this Quarter CareDx 696,336 shares (about $45.26M)MarineMax 108,296 shares (about $5.66M)Five9 155,852 shares (about $5.30M)The Ensign Group 10,569 shares (about $1.82M)DoubleVerify 56,233 shares (about $758.58K) Sector Allocation Over TimeMap of 500 Largest Holdings ofGagnon Securities LLC Selling Neutral Buying Latest 13F Holdings and Changes Since Previous Quarterly FilingIssuer NameHoldings ValueApproximate Purchase/SaleChange in SharesShares Held% of PortfolioSectorCDNACareDx$69,835,964$45,261,859 ▼-39.3%1,074,39912.1%HealthcareWGSGeneDx$37,327,333$620,406 ▼-1.6%516,2846.5%HealthcareENSGThe Ensign Group$28,094,824$1,817,868 ▼-6.1%163,3424.9%HealthcareCAKECheesecake Factory$22,719,843$621,547 ▼-2.7%215,8863.9%Consumer DiscretionaryBLFSBioLife Solutions$20,671,968$147,980 ▼-0.7%532,0973.6%HealthcareFRSHFreshworks$19,986,434$15,412 ▼-0.1%1,562,6613.5%TechnologyFIVNFive9$19,278,432$5,300,526 ▼-21.6%566,8463.3%TechnologyAMRCAmeresco$18,565,003$1,446,904 ▲8.5%896,4273.2%IndustrialsEPDEnterprise Products Partners$18,124,671$56,940 ▼-0.3%508,9773.1%EnergyKMXCarMax$17,981,125$47,780 ▲0.3%326,2773.1%Consumer DiscretionaryHINGE HEALTH INC$17,519,050$271,883 ▼-1.5%180,1633.0%CL AEQIXEquinix$16,640,491$273,127 ▼-1.6%16,4502.9%Real EstateGNRCGenerac$15,869,754$727,222 ▲4.8%76,6842.8%IndustrialsPCRXPacira BioSciences$15,651,365$405,509 ▲2.7%624,8052.7%HealthcareTMCITreace Medical Concepts$15,166,676$1,715,505 ▲12.8%3,415,9182.6%HealthcareAMPLAmplitude$14,228,978$389,808 ▼-2.7%1,027,3632.5%TechnologyNVGSNavigator$14,083,171$14,083,171 ▲New Holding607,5572.4%EnergyBLBlackLine$13,796,396$3,827,244 ▲38.4%520,0302.4%TechnologyQDELQuidelOrtho$13,686,843$2,826,733 ▲26.0%1,298,5622.4%HealthcareVERXVertex$12,312,303$3,347,417 ▲37.3%1,045,1872.1%TechnologyPROFProfound Medical$11,893,405$524,975 ▲4.6%2,050,5872.1%HealthcareISRGIntuitive Surgical$11,850,8300.0%29,1442.1%HealthcareCARGCarGurus$11,484,735$46,740 ▲0.4%368,5732.0%Communication ServicesPRLBProto Labs$11,227,489$198,047 ▲1.8%118,3711.9%IndustrialsASPNAspen Aerogels$8,537,150$120,900 ▲1.4%1,557,8741.5%MaterialsBKDBrookdale Senior Living$8,005,265$8,005,265 ▲New Holding739,1751.4%HealthcareBVBrightView$7,483,930$7,483,930 ▲New Holding748,3931.3%IndustrialsOSUROraSure Technologies$7,160,288$919,071 ▲14.7%1,826,6041.2%HealthcareDVDoubleVerify$6,301,112$758,583 ▼-10.7%467,0951.1%TechnologyKLTRKaltura$5,877,501$1,695,743 ▲40.6%4,591,7981.0%TechnologySPGYFWhitecap Resources$5,410,918$20,244 ▲0.4%436,7340.9%EnergyHZOMarineMax$5,396,523$5,663,881 ▼-51.2%103,1840.9%Consumer DiscretionaryPNTGThe Pennant Group$5,266,3650.0%135,0350.9%HealthcareCMGChipotle Mexican Grill$4,995,383$28,340 ▲0.6%156,3500.9%Consumer DiscretionaryICUIICU Medical$4,755,911$36,917 ▲0.8%29,6300.8%HealthcareCARETRUST REIT INC$4,753,7540.0%129,9550.8%COMCELCCelcuity$4,239,927$6,282 ▲0.1%53,3190.7%HealthcareMCHPMicrochip Technology$2,066,908$27,064 ▲1.3%26,5770.4%TechnologyNCNOnCino$1,332,464$33,323 ▼-2.4%73,4950.2%TechnologyGNTXGentex$1,269,995$27,349 ▲2.2%58,4170.2%Consumer DiscretionarySLGSL Green Realty$1,265,1690.0%25,8620.2%Real EstateSAMBoston Beer$1,233,266$38,709 ▲3.2%7,5190.2%Consumer StaplesGNLGlobal Net Lease$1,222,934$103,605 ▼-7.8%148,0550.2%Real EstatePARAMOUNT SKYDANCE CORP$1,119,762$1,119,762 ▲New Holding108,3990.2%COM CL BNTDOYNintendo$908,212$22,654 ▲2.6%72,4830.2%Consumer DiscretionaryGOOGLAlphabet$879,4680.0%2,5560.2%Communication ServicesTAT&T$859,880$105,969 ▲14.1%35,2410.1%Communication ServicesMRVLMarvell Technology$853,928$81,641 ▲10.6%3,2320.1%TechnologyAPPSDigital Turbine$826,761$81,652 ▼-9.0%74,4830.1%TechnologyDOCUDocusign$816,477$587,361 ▼-41.8%12,1590.1%TechnologyNVDANVIDIA$798,8730.0%3,4980.1%TechnologyCVLTCommVault Systems$732,509$1,799 ▲0.2%4,8860.1%TechnologyMUMicron Technology$723,2100.0%6790.1%TechnologySHOPIFY INC$703,980$107,369 ▲18.0%4,7470.1%CL A SUB VTG SHSPFEPfizer$698,797$32,969 ▲5.0%24,5020.1%HealthcareRNGRingCentral$635,174$1,046 ▼-0.2%8,5030.1%TechnologyMETAMeta Platforms$608,4260.0%8390.1%Communication ServicesCNFINANCE HLDGS LTD$595,943$52,129 ▼-8.0%305,6120.1%SPON ADSFLAGSTAR BANK NATIONAL ASSOCIA$559,856$309,045 ▼-35.6%47,9740.1%COM NEWHIMXHimax Technologies$555,7370.0%39,4980.1%TechnologyDVNDevon Energy$541,246$334,480 ▼-38.2%11,7560.1%EnergyLTHLife Time Group$536,9840.0%13,4650.1%Consumer DiscretionaryONTOOnto Innovation$532,529$6,464 ▲1.2%1,7300.1%TechnologyTECNOGLASS HOLDINGS INC$485,452$485,452 ▲New Holding13,6670.1%COM SHSAKAMAkamai Technologies$476,448$140,063 ▲41.6%4,4800.1%TechnologyABTAbbott Laboratories$471,320$471,320 ▲New Holding4,7690.1%HealthcareMRKMerck & Co., Inc.$463,1030.0%3,1870.1%HealthcareAMTAmerican Tower$454,403$454,403 ▲New Holding2,7760.1%Real EstateCGNXCognex$442,502$151,746 ▼-25.5%7,2960.1%TechnologyVIAVViavi Solutions$428,884$10,270 ▲2.5%10,2310.1%TechnologyCESDFCES Energy Solutions$420,4720.0%33,3500.1%EnergyETSY INC$413,355$1,930 ▲0.5%5,7820.1%COMGOOGAlphabet$405,140$252,148 ▼-38.4%1,1890.1%Communication ServicesWRBYWarby Parker$395,087$78,923 ▲25.0%14,2220.1%Consumer DiscretionarySBUXStarbucks$380,0680.0%4,0450.1%Consumer DiscretionaryMTSIMACOM Technology Solutions$371,120$6,266 ▲1.7%1,3030.1%TechnologyWEAVWeave Communications$362,6750.0%49,1430.1%HealthcareVCELVericel$314,657$21,515 ▲7.3%7,8390.1%HealthcareMSFTMicrosoft$286,198$1,026 ▲0.4%5580.0%TechnologyGRANDSTAND LTD$231,717$231,717 ▲New Holding153,4550.0%ORDINARY SHARESELECTROVAYA INC$214,052$42,530 ▲24.8%32,8300.0%COM NEWACTINIUM PHARMACEUTICALS INC$203,9990.0%182,1420.0%COMREIN THERAPEUTICS INC$184,1720.0%229,0700.0%COM NEWREDHILL BIOPHARMA LTD$42,4340.0%88,4050.0%SPONSORED ADRNAVIGATOR HLDGS LTD$0$11,407,149 ▼-100.0%00.0%COMTECHBio-Techne$0$864,050 ▼-100.0%00.0%HealthcareBEYOND MEATS INC$0$285,953 ▼-100.0%00.0%COMPLPlanet Labs PBC$0$276,702 ▼-100.0%00.0%IndustrialsRMBSRambus$0$236,012 ▼-100.0%00.0%TechnologyBXBlackstone$0$228,280 ▼-100.0%00.0%FinancePTENPatterson-UTI Energy$0$159,916 ▼-100.0%00.0%EnergyShowing largest 100 holdings. 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