Don't settle for ordinary quarterly reports.

I take a look at three companies that beat market expectations every week, since I believe that it's the biggest factor in a stock beating the market. Leaving Wall Street's pros with stunned expressions can be a good thing. It usually means that the companies have more in the tank than analysts figured. Capital appreciation typically follows.

Let's take a look at a few companies that humbled the prognosticators over the past few trading days.

We can start with AeroVironment (Nasdaq: AVAV). The maker of unmanned aircraft vehicles saw its fiscal third quarter revenue soar 39%, with earnings growth soaring even higher to land at $0.52 a share. The pros were targeting net income of merely $0.38 a share.

Companies that rely on meaty defense contracts may be pressured given the inevitable government belt-tightening, but companies including AeroVironment and iRobot (Nasdaq: IRBT) that provide high-tech military vehicles that keep soldiers out of harm's way should hold up better than the pack.

Clean Energy Fuels (Nasdaq: CLNE) also continues to clean up nicely. Just a few weeks ago, analysts figured the company would post a wider loss than the $0.03 a share deficit it posted a year ago. A week ago, Wall Street improved its outlook in expecting breakeven results. The optimism didn't catch up quickly enough to the reality. The company, with its network of natural-gas fueling stations, earned $0.18 a share -- or $0.17 a share on an adjusted basis -- in the fourth quarter.

Finally, we have Suntech Power (NYSE: STP) starring on the bottom line. The solar energy giant earned $2.02 a share, blowing past Wall Street's guesstimate of $0.29 a share.

It wasn't necessarily a great week for solar. Evergreen Solar made a massive deficit official. Canadian Solar (Nasdaq: CSIQ) spooked the market by warning of shrinking gross margins. Cuts in European incentive plans threaten to sting demand at a time when production is ramping up. However, Suntech Power looks good, at least from the rearview mirror perspective.

It's important to keep watching the companies that surpass expectations. Over time, it will be a lucrative experience for investors as the market rewards the overachievers. That's the kind of surprise that we look for in the Rule Breakers newsletter service. Want in? Check out a 30-day trial subscription.

Either way, come back next Monday to learn about more stocks that blew the market away.

AeroVironment and iRobot are Motley Fool Rule Breakers picks. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.

Longtime Fool contributor Rick Munarriz is a fan of toppers. He does not own shares in any of the stocks in this column. He is also part of the Rule Breakers newsletter research team, seeking out tomorrow's ultimate growth stocks a day early. The Fool has a disclosure policy.