Costco is an excellent example of one of the best run companies in the country. While I wouldn't advocate buying it at its current price, it is an example of a very high quality company that is run by world class managers.
Costco is an outstanding retailer who continues to perform well (2024 Q3). Looking at the graphs in the attached document tells most of the story behind their success. I suggest looking at them on a PC screen to see them clearly.