UnitedHealth, Delta Air Lines, Inc., Fastenal Co are the ones to read about today.

Markets don't have a clear cut direction — Nasdaq trades sideways at 12,100. Dow Jones holds at 33,900.

With Q1 earnings season getting underway, around 100% of US companies have missed market estimates so far. This past week, ManpowerGroup Inc. and F.N.B. Corporation published downbeat reports while Whirlpool Corp & Activision Blizzard are scheduled to release their results in the coming days.

What is an earnings report?

An earnings report is an official statement of a company's profitability over a certain period of time. These reports are typically announced once a quarter, and their timing is considered when making predictions about the market due to the large impact they have on it.

Though markets were flat, stocks have released their quarterly earnings reports. Take a look.

UnitedHealth: EPS of zero, Revenue of $91.93 billion

UnitedHealth trades at $504.74 after the company released its quarterly results.

As the current session draws to a close, the healthcare solutions and services company is hovering around the $504.74 level after closing Friday at $511.79 and dropping by 1.38%.

Delta Air Lines: EPS of zero, Revenue of $12.76 billion

Following the release of quarterly results, Delta Air Lines trades at $34.44.

From an earlier low of $33.68, the major US airline is on track to end the session around $34.44 after gaining 66.5 cents compared to last trading session's $33.77 (1.97%).

Fastenal: EPS of zero, Revenue of $1.86 billion

Fastenal trades at $53.33 after the company released its quarterly results.

As the session comes to an end, the industrial and construction supplies provider recovers back to $53.33 after dipping down to $52.94 earlier.

Carmax: EPS of zero, Revenue of $5.72 billion

Carmax trades at $69.03 after the company released its quarterly results.

Drifting lower, the used car dealer is nearing the end of the session at $69.03 after ranging between $68.45 and $69.75 today.

Over the past 8 months, the used car company has retreated 33.35% from a noteworthy peak of $104.22. So far this year, it has been beating the S&P 500 by 6.96%. The company is currently trading with a market cap of $10.91 billion with an average daily trading volume of 3.14 million shares.