Question about Berkshire Hathaway on Yahoo Financials

I track my modest portfolio using the Yahoo Finance pages.

Why in Yahoo is there nearly no info for BRK-A and BRK-B other than the price quote and news.

For example, the following is greyed out: Message Board, Profile, Statistics, Filings, Analyst Opinion, Analyst Estimates, Income Statments, Balance Sheet, Cash Flow.

What’s up with that? Why no message board?

I see a message board for the A shares. Maybe you need to be logged in to see it.

The B shares don’t have as much information, probably because much of it is the same as the information about the A shares.