Berkshire Hathaway has highly visible brands like Berkshire Hathaway Home Services (https://www.bhhs.com/) and Berkshire Hathaway Energy (https://www.brkenergy.com/. You see their brands very frequently on yard signs and advertisements.

Many people can land on this website first. Not everyone is looking for the CEO letters and annual statements. That's basically assuming that anyone who interacts with BH has to be an investor which is definitely not the case.