In the past several years, Amazon, CVS Health, and Walgreens each spent billions to own primary-care companies. CVS bought Oak Street Health. Here's how the bets that Amazon, CVS, and Walgreens made are playing out. CVS is building more Oak Street clinics despite lossesAn Oak Street Health location in Elgin, Illinois during its grand opening. CVS is hoping to help Oak Street clinics get profitable quicker by driving more patients their way.

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Persons: Andy Jassy, Thos Robinson, It's, JP Morgan, Berkshire Hathaway, Business Insider's Eugene Kim, Kim, they've, it's, VillageMD hasn't, Jefferies, Brian Tanquilut, Tanquilut, Lydia Ramsey, Mike Pykosz, Pykosz, Aetna, Michael Cherny Organizations: CVS Health, Walgreens, Amazon, CVS, Oak Street Health, Business, Aetna, Medical, Washington Post, Summit Health, Oak, Health Locations: Oak, VillageMD, Haven, Florida, Elgin , Illinois