Find The Next Great Compounders.
A monthly investing letter focused on exceptional businesses and long-term wealth creation.

See what we’ve
written lately

Invite the Unexpected: Introducing Randomness

Often we do not realize this, but we spend most of our lives building walls. We build routines. We build expertise in our field. We build circles of familiar people, familiar ideas, familiar places. Every year we become more efficient at navigating a world we already know. Efficiency feels like...

AppLovin — The GOAT Compounder?

AppLovin is an AI-powered advertising technology platform whose mission is to create meaningful connections between companies and their ideal customers.  Founded in 2011, the company was historically organized around two segments — Advertising and Apps — but completed a major strategic pivot on June 30, 2025, when it divested its entire...

The $650 Billion Bet: How Cloud and AI Infrastructure Really Make Money

And who gets burned if the AI bubble deflates Every week a new headline announces another hundred billion dollars flowing into AI datacenters. Microsoft, Amazon, Google, and Meta have collectively pledged over $650 billion in capital expenditure for 2026 alone — more than the GDP of Sweden. Investors are simultaneously thrilled...

Coming soon

This is Diary of a Compounder, a brand new site by Tommaso Tabarelli that's just getting started. Things will be up and running here shortly, but you can subscribe in the meantime if you'd like to stay up to date and receive emails when new content...

You’ve successfully subscribed to The Compounding Letter
Welcome back! You’ve successfully signed in.
Great! You’ve successfully signed up.
Success! Your email is updated.
Your link has expired
Success! Check your email for magic link to sign-in.