Charles Sin's Quality Compounders on Autopilot

I'm Chris, one of the co-founders of Autopilot. Charles Sin starts every stock with one question: is this business so deeply embedded in the system it operates in that replacing it is practically impossible?

That question is the whole Portfolio. Here's how he applies it.

One thing first, because we're an SEC-registered investment adviser and I have to say it. Autopilot is the app. The actual investment advice comes from Autopilot Advisers, LLC. If you want the full legal version of anything in here, it's on our disclaimer page.

1) Who he is

Charles Sin is an independent Pilot. He creates and manages Quality Compounders.

His description says he's a UK-based investor across public stocks, early-stage ventures, and operating businesses, that he has made angel investments and founded two businesses, one consumer and one technology, and that a philosophy degree from University College London shapes his first-principles approach.

2) The eight criteria

After the first question, every candidate is judged on eight things: how important it is to the system, how strong its moat is, how durable that moat is, financial quality, capital allocation discipline, management quality, geopolitical resilience, and exposure to long-term growth.

Only businesses that pass every criterion get considered.

3) How he values them

Mainly through discounted cash flow analysis, owner earnings yield, and free cash flow multiples. A company also has to offer a reasonable margin of safety.

For those unaware, margin of safety means buying at a price enough below your estimate of value that you can be somewhat wrong and still be all right.

4) What that gets you, and what it costs

The result is a concentrated, high-conviction, long-term Portfolio. The idea is to let compounding and widening competitive advantages do the work.

I want to be honest with you. Quality businesses rarely look cheap, so a strict margin of safety can mean holding few names, and quality stocks can lag when the market chases faster growth.

5) How following works

Pick the Portfolio, connect the brokerage you already use, and allocate money. You give Autopilot Advisers limited authority to send orders to the account you already have. When the Portfolio changes, we send them and your broker fills them. The money stays put.

A flat cash subscription, not a percentage of your balance. Per our Form CRS dated February 2026, Basic Tier has no Base Advisory and Licensing Fee, and Premium Tier is $29.99 to $199.99 a quarter or $99.99 to $699.99 a year. Pilot subscriptions are separate and add on for each Pilot you subscribe to. Because it's a flat dollar amount, it's a bigger share of a small account than a big one, so do the math at your balance.

TLDR: Quality Compounders, from Charles Sin, holds a concentrated set of businesses so embedded in their systems that replacing them looks implausible, each passing eight criteria and bought with a margin of safety. It's built for the long term and can lag in speculative markets.

Frequently asked questions

Charles Sin portfolio

Charles Sin, an independent Pilot based in the UK, runs Quality Compounders on Autopilot, a concentrated long-term Portfolio of deeply embedded businesses that pass eight quality criteria and trade with a margin of safety.

Charles Sin Autopilot

Quality Compounders is his Portfolio on Autopilot. He values companies mainly with discounted cash flow, owner earnings yield, and free cash flow multiples.

How can I follow Charles Sin's portfolio in my own brokerage?

Pick Quality Compounders in the app, connect the brokerage you already use, and allocate money. When the Portfolio changes, Autopilot Advisers sends the orders and your broker fills them.

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Since Autopilot Advisers is an SEC-registered investment adviser, we have to put disclaimers on stuff like this. They're below, and the full version is on our disclaimer page.

Disclosures

© Autopilot Holdings Corporation 2026 — All rights reserved. “Autopilot” refers to Autopilot Holdings Corporation and its wholly-owned, and separately managed subsidiaries, including Autopilot Advisers, LLC, an SEC-registered investment adviser. All investing is subject to investment risks, including possible loss of the principal invested, and past performance is not indicative of future results. View our Customer Relationship Summary and other important information at joinautopilot.com/disclaimer.

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