Institutional manager

BAMCO INC /NY/

Holds positions in 116 of the S&P 500, worth $18.1bn as reported for the quarter ended 31-mar-2026.

Positions held116of 488 index companies covered

Reported value$18.1bnS&P 500 positions only

Top ten weight69%how concentrated the book is

Filing entities1single filer

Largest positions

The 60 biggest by reported value, of 116 held. The rest are smaller than every one of these.

Tesla, Inc.TSLA11.9m$4.44bnConsumer Discretionary Arch Capital GroupACGL16.7m$1.60bnFinancials MSCIMSCI2.7m$1.45bnFinancials GartnerIT5.9m$937mInformation Technology Idexx LaboratoriesIDXX1.6m$918mHealth Care FactSetFDS3.8m$815mFinancials Charles Schwab CorporationSCHW7.5m$701mFinancials CoStar GroupCSGP16.3m$658mReal Estate NvidiaNVDA2.9m$509mInformation Technology Verisk AnalyticsVRSK2.5m$477mIndustrials VertivVRT1.2m$296mIndustrials Interactive BrokersIBKR4.0m$271mFinancials AmazonAMZN1.3m$270mConsumer Discretionary WelltowerWELL1.3m$266mReal Estate EquinixEQIX243,975$239mReal Estate Taiwan Semiconductor ManufacturingTSM636,267$215m AmphenolAPH1.7m$210mInformation Technology AirbnbABNB1.4m$182mConsumer Discretionary Quanta ServicesPWR325,840$179mIndustrials Wynn ResortsWYNN1.7m$176mConsumer Discretionary Mettler ToledoMTD133,639$169mHealth Care BroadcomAVGO523,219$162mInformation Technology Alphabet Inc. (Class A)GOOGL521,595$150mCommunication Services Meta PlatformsMETA256,700$147mCommunication Services CBRE GroupCBRE1.1m$146mReal Estate Liberty Live Holdings, Inc.LLYVA1.5m$144m PrologisPLD1.1m$141mReal Estate TransDigm GroupTDG78,664$91mIndustrials Digital RealtyDLR484,763$87mReal Estate VentasVTR998,339$82mReal Estate Hilton WorldwideHLT265,363$81mConsumer Discretionary Lilly (Eli)LLY85,066$78mHealth Care CRH plcCRH739,176$78mMaterials Public StoragePSA266,847$72mReal Estate Legence Corp.LGN1.2m$70m DatadogDDOG587,382$69mInformation Technology Monolithic Power SystemsMPWR62,994$69mInformation Technology Las Vegas SandsLVS1.2m$66mConsumer Discretionary Roper TechnologiesROP186,159$66mInformation Technology Jefferies Financial Group Inc.JEF1.5m$63m Fair IsaacFICO57,929$62mInformation Technology Visa Inc.V180,092$54mFinancials Iron MountainIRM525,270$54mReal Estate Rollins, Inc.ROL998,020$53mIndustrials Axon EnterpriseAXON117,942$50mIndustrials West Pharmaceutical ServicesWST199,750$50mHealth Care Lowe'sLOW206,788$49mConsumer Discretionary ASML HoldingASML35,625$47m Live Nation EntertainmentLYV296,628$45mCommunication Services Intuitive SurgicalISRG97,297$45mHealth Care CrowdStrikeCRWD110,588$43mInformation Technology Vulcan Materials CompanyVMC153,819$42mMaterials MastercardMA79,754$40mFinancials MGM ResortsMGM996,534$37mConsumer Discretionary Cooper Companies (The)COO454,864$33mHealth Care Simon Property GroupSPG166,058$31mReal Estate Veeva SystemsVEEV168,126$30mHealth Care Bio-TechneTECH561,441$29mHealth Care Equity ResidentialEQR473,496$28mReal Estate MicrosoftMSFT73,753$27mInformation Technology

What this page is not

Positions in the companies this site covers, 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.