Subject: Re: Back of the envelope
I get 1437608 A shares, or 2156 million B shares.

Page 23
On an equivalent Class A common stock basis, there were 1,437,608 shares outstanding as of September 30, 2024

Page 1
Number of shares of common stock outstanding as of October 21, 2024:
Class A — 551,977
Class B — 1,328,446,516

Equivalent Class A common stock basis = 551,977 + 1,328,446,516/1500 = 1437608




Yes you are quite right. I just lazily used Yahoo Finance's shares outstading (2171.1m), who knows where they get that, because it looked about right, but your calculation is clearly correct. And incidentally, the fact that the p.1 and p.23 numbers are the same also shows that there were no share repurchases in the 3 weeks between September 30 and October 21.

I have updated my calculation using the 2156.412m number, and it gives me a 5 groves number of $443.43 per B-share, instead of $440.44.

Getting close, especially with Berkshire shares down $7 to $462 today. So I'm back up to a 2% stake, and I'll add more if the price comes down a bit farther...