Before we get to today’s column, the big day is here: Anthropic dropped its long-awaited public S-1 filing Monday morning . Tune in today for stories from my colleagues and me that will be breaking down the most important takeaways from the filing, such as improvements in the company’s compute efficiency, details on its spending and cash burn, and interesting new disclosures that could point to an eventual end to its unusual Long-Term Benefit Trust, a group of non-shareholders who advise the company on safety and social issues and can appoint a majority of its board.

Onto today’s column...

It seems like every AI startup financing these days has multiple tranches in which different investors get in at different valuations. At first, it was unusual to see just two tranches. Now we see extra-hot funding rounds with three tranches or more .

It’s no secret that investors aren’t thrilled about these multi-tranche rounds (specifically, the investors that can’t get in at the lower valuation).…