Subject: Re: BRK.B performance vs Price/Book
Here is a site that has P/B back to 2004. https://www.financecharts.com/......
You said you derived it using SEC filings for more than 5 years, so why didn't you do more than 5?

That's an odd little site. On the one hand, P/B back 20 years. On the other hand, it skips lots of quarters of book value reports.

On the third hand, they did a nice job of making it so you can't extract the data into a spreadsheet.

R:)