https://dqydj.com/sp-500-return-calculator/
https://dqydj.com/stock-return-calculator/
Since Jan 1, 2010, 18% for UNH, 15% for MOH/CNC, 14% for CI/ELV/HUM/SP500, 8.5% for CVS.
Also, these businesses are competing to sell a completely fungible commodity good with tons of non profits like Kaiser Permanente, HCSC, Cambia, Independence Blue Cross, and many others. It makes no sense to expect those businesses to be able to earn any decent profit margin when their competition only needs 0%.