Quality compounders are well-oiled machines. Their competitive advantages allow them to make profits consistently and reinvest them into projects that generate even more profits, creating a virtuous cycle of returns.

We love companies like this because something about their business models makes them special. That said, here are three quality compounders that could turbocharge your returns.

Comfort Systems (FIX)

Market Cap: $47.11 billion

Formed through the merger of 12 companies, Comfort Systems (NYSE: FIX) provides mechanical and electrical contracting services.

Why Do We Love FIX?

1. Backlog has averaged 33.6% growth over the past two years, showing it has a pipeline of unfulfilled orders that will support revenue in the future
2. Share repurchases over the last two years enabled its annual earnings per share growth of 74.2% to outpace its revenue gains
3. Returns on capital are growing as management capitalizes on its market opportunities

Comfort Systems’s stock price of $1,348 implies a valuation ratio of 42.8x forward P/E. Is now a good time to buy? Find out in our full research report, it’s free.

ResMed (RMD)

Market Cap: $37.82 billion

Founded in 1989 to address the then-underdiagnosed condition of sleep apnea, ResMed (NYSE: RMD) develops cloud-connected medical devices and software solutions that treat sleep apnea, COPD, and other respiratory disorders for home and clinical use.

Why Are We Positive On RMD?

1. Business is well-positioned no matter the global macroeconomic backdrop as its constant currency revenue growth averaged 9% over the past two years
2. Performance over the past five years shows its incremental sales were extremely profitable, as its annual earnings per share growth of 14.2% outpaced its revenue gains
3. Free cash flow margin expanded by 19.7 percentage points over the last five years, providing additional flexibility for investments and share buybacks/dividends

ResMed is trading at $259.37 per share, or 22.6x forward P/E. Is now the right time to buy? See for yourself in our comprehensive research report, it’s free.

Amphenol (APH)

Market Cap: $176.3 billion

With over 90 years of connecting the world's technologies, Amphenol (NYSE: APH) designs and manufactures connectors, cables, sensors, and interconnect systems that enable electrical and electronic connections across virtually every industry.

Why Are We Backing APH?

1. Annual revenue growth of 35.6% over the last two years was superb and indicates its market share increased during this cycle
2. Performance over the past two years shows its incremental sales were extremely profitable, as its annual earnings per share growth of 49% outpaced its revenue gains
3. Robust free cash flow margin of 15.7% gives it many options for capital deployment, and its growing cash flow gives it even more resources to deploy

At $144.33 per share, Amphenol trades at 32.9x forward P/E. Is now the time to initiate a position? Find out in our full research report, it’s free.

High-Quality Stocks for All Market Conditions

Your portfolio can’t afford to be based on yesterday’s story. The risk in a handful of heavily crowded stocks is rising daily.

The names generating the next wave of massive growth are right here in our Top 6 Stocks for this week. This is a curated list of our High Quality stocks that have generated a market-beating return of 244% over the last five years (as of June 30, 2025).

Stocks that made our list in 2020 include now familiar names such as Nvidia (+1,326% between June 2020 and June 2025) as well as under-the-radar businesses like the once-micro-cap company Tecnoglass (+1,754% five-year return). Find your next big winner with StockStory today.