Institutional manager
Calamos Advisors LLC
Holds positions in 337 of the S&P 500, worth $17.8bn as reported for the quarter ended 31-mar-2026.
Positions held337of 488 index companies covered
Reported value$17.8bnS&P 500 positions only
Top ten weight41%how concentrated the book is
Filing entities1single filer
Largest positions
The 60 biggest by reported value, of 337 held. The rest are smaller than every one of these.
NvidiaNVDA8.2m$1.43bnInformation TechnologyApple Inc.AAPL4.8m$1.21bnInformation TechnologyAlphabet Inc. (Class A)GOOGL3.6m$1.02bnCommunication ServicesMicrosoftMSFT2.4m$879mInformation TechnologyAmazonAMZN3.4m$709mConsumer DiscretionaryBroadcomAVGO1.7m$511mInformation TechnologyState Street CorporationSTT1.5m$507mFinancialsMeta PlatformsMETA730,902$418mCommunication ServicesTesla, Inc.TSLA841,450$313mConsumer DiscretionaryLilly (Eli)LLY308,497$284mHealth CareBoeingBA3.2m$255mIndustrialsOracle CorporationORCL4.5m$245mInformation TechnologyJPMorgan ChaseJPM804,936$237mFinancialsVisa Inc.V761,893$230mFinancialsExxonMobilXOM1.3m$218mEnergyWalmartWMT1.6m$195mConsumer StaplesJohnson & JohnsonJNJ773,100$189mHealth CareNetflixNFLX1.7m$168mCommunication ServicesGoldman SachsGS170,881$145mFinancialsChevron CorporationCVX691,326$143mEnergyWells FargoWFC1.7m$136mFinancialsBerkshire HathawayBRK.B273,865$134mFinancialsGE VernovaGEV152,890$133mIndustrialsMastercardMA248,453$124mFinancialsPPL CorporationPPL2.2m$115mUtilitiesBank of AmericaBAC2.3m$112mFinancialsLinde plcLIN225,271$112mMaterialsMicron TechnologyMU322,206$109mInformation TechnologyPalantir TechnologiesPLTR741,654$108mInformation TechnologyHome Depot (The)HD328,049$108mConsumer DiscretionaryMicrochip TechnologyMCHP1.9m$107mInformation TechnologyAbbVieABBV483,670$105mHealth CareApplied MaterialsAMAT307,090$105mInformation TechnologyPhilip Morris InternationalPM592,924$98mConsumer StaplesAdvanced Micro DevicesAMD477,928$97mInformation TechnologyRTX CorporationRTX503,016$97mIndustrialsCaterpillar Inc.CAT134,683$95mIndustrialsMerck & Co.MRK777,663$94mHealth CareNextEra EnergyNEE1.3m$93mUtilitiesCostcoCOST91,006$91mConsumer StaplesCiscoCSCO1.2m$90mInformation TechnologyHewlett Packard EnterpriseHPE1.4m$90mInformation TechnologyAlbemarle CorporationALB1.2m$90mMaterialsLam ResearchLRCX413,151$88mInformation TechnologyMorgan StanleyMS535,714$88mFinancialsCitigroupC733,611$83mFinancialsGE AerospaceGE288,935$82mIndustrialsMarathon PetroleumMPC319,159$78mEnergyAmerican ExpressAXP253,116$77mFinancialsIntuitive SurgicalISRG165,835$76mHealth CareCoca-Cola Company (The)KO999,207$76mConsumer StaplesLowe'sLOW314,574$74mConsumer DiscretionaryTJX CompaniesTJX457,769$73mConsumer DiscretionaryProcter & GamblePG498,687$72mConsumer StaplesApollo Global ManagementAPO1.2m$72mFinancialsKKR & Co.KKR1.8m$72mFinancialsChubb LimitedCB218,874$71mFinancialsCSX CorporationCSX1.7m$71mIndustrialsNorfolk SouthernNSC244,559$70mIndustrialsThermo Fisher ScientificTMO139,230$68mHealth Care
What this page is not
Positions in S&P 500 constituents only, from 13F filings, which report US listed, long, US custodied holdings. A manager's real book is larger than this in every case: anything outside the index, outside US custody, held through derivatives, or below its reporting obligation is not here.