So, funnily enough in my own career I've experienced The Headquarters event several times, and each time, after the lavish new headquarters is built, I think to myself, "this is it, we've peaked!" and each time it was an inflection point followed by even more growth and success.

I think I'm at 5 now.

Also three of those companies designed their own font too, though none of them still use it.

Somebody at Jane Street is ingesting data about new $X (HQs and fonts as two examples) and predicting share prices from that.