Earnings season rages on this week. Here are the 8 companies to watch - and what to look out for.

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Apple CEO Tim Cook.

• Tech giant Apple and Warren Buffett's Berkshire Hathaway are among the large-cap companies announcing quarterly earnings in the week starting July 29.
• The week comes after positive quarterly reports from Facebook and Hasbro. Ford and PayPal were among the companies that upset investors by lowering yearly forecasts.
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Coming off a week that included earnings reports from Facebook, Google, Tesla, and several other heavyweights, the last week of July has plenty more in store.

Here's what to look for when Apple, Berkshire Hathaway, ExxonMobil, Mastercard and five other elite and heavily weighted companies announce their latest quarterly earnings. All estimates are sourced from Bloomberg.

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