Institutional manager

BLAIR WILLIAM & CO/IL

Holds positions in 468 of the S&P 500, worth $25.2bn as reported for the quarter ended 31-mar-2026.

Positions held468of 488 index companies covered

Reported value$25.2bnS&P 500 positions only

Top ten weight37%how concentrated the book is

Filing entities1single filer

Largest positions

The 60 biggest by reported value, of 468 held. The rest are smaller than every one of these.

Alphabet Inc. (Class A)GOOGL5.5m$1.57bnCommunication Services Apple Inc.AAPL5.9m$1.51bnInformation Technology MicrosoftMSFT3.5m$1.29bnInformation Technology AmazonAMZN6.1m$1.26bnConsumer Discretionary NvidiaNVDA5.4m$947mInformation Technology JPMorgan ChaseJPM2.3m$679mFinancials GE VernovaGEV664,603$580mIndustrials Visa Inc.V1.8m$558mFinancials Idexx LaboratoriesIDXX946,336$532mHealth Care CostcoCOST521,277$519mConsumer Staples MastercardMA923,405$461mFinancials Meta PlatformsMETA721,720$413mCommunication Services FastenalFAST7.4m$342mIndustrials AmphenolAPH2.5m$318mInformation Technology Lilly (Eli)LLY324,018$298mHealth Care WalmartWMT2.4m$295mConsumer Staples AbbVieABBV1.3m$290mHealth Care BroadcomAVGO918,328$284mInformation Technology Berkshire HathawayBRK.B495,386$283mFinancials Stryker CorporationSYK847,701$279mHealth Care Intercontinental ExchangeICE1.6m$251mFinancials Home Depot (The)HD761,419$250mConsumer Discretionary Danaher CorporationDHR1.3m$246mHealth Care Progressive CorporationPGR1.2m$242mFinancials UberUBER3.3m$237mIndustrials Johnson & JohnsonJNJ955,632$234mHealth Care EcolabECL866,411$230mMaterials American ExpressAXP693,767$210mFinancials Palo Alto NetworksPANW1.3m$209mInformation Technology Intuitive SurgicalISRG425,228$196mHealth Care TransDigm GroupTDG166,248$193mIndustrials ServiceNowNOW1.8m$188mInformation Technology Veeva SystemsVEEV1.1m$188mHealth Care BoeingBA922,102$184mIndustrials NetflixNFLX1.8m$170mCommunication Services CintasCTAS973,553$165mIndustrials ExxonMobilXOM946,386$161mEnergy Chevron CorporationCVX715,986$148mEnergy Arista NetworksANET1.2m$141mInformation Technology Abbott LaboratoriesABT1.3m$136mHealth Care Aon plcAON421,605$136mFinancials Blackstone Inc.BX1.2m$136mFinancials CopartCPRT4.1m$135mIndustrials Goldman SachsGS156,265$132mFinancials Procter & GamblePG893,933$129mConsumer Staples IBMIBM518,457$126mInformation Technology Union Pacific CorporationUNP514,829$125mIndustrials Quanta ServicesPWR225,850$124mIndustrials DexcomDXCM1.9m$121mHealth Care Rollins, Inc.ROL2.3m$121mIndustrials Linde plcLIN233,182$116mMaterials Micron TechnologyMU332,311$112mInformation Technology Waste ManagementWM484,303$111mIndustrials Tesla, Inc.TSLA296,041$110mConsumer Discretionary Merck & Co.MRK901,789$108mHealth Care McDonald'sMCD348,243$108mConsumer Discretionary Coca-Cola Company (The)KO1.4m$108mConsumer Staples O'Reilly AutomotiveORLY1.1m$102mConsumer Discretionary Rockwell AutomationROK284,067$102mIndustrials Live Nation EntertainmentLYV662,081$101mCommunication Services

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.