As usual, earnings season brought with it its fair share of surprises and volatility. But three stories, in particular, are worth a closer look. Tesla (NASDAQ: TSLA), Apple (NASDAQ: AAPL), and Walt Disney (NYSE: DIS) have all seen their stocks soar this season as their quarterly performances surpassed expectations. Here's a look at these companies' latest results -- and why investors have been bullish on their stocks. The Model X. Image source: Tesla. Tesla Shares of electric-car company Tesla have skyrocketed in the weeks since the company's third-quarter earnings report. The stock has risen more than 38% since the quarterly update was posted on Oct. 23, helped by a 29% gain in the two days following the release. Investors were impressed with the company's non-GAAP (adjusted) earnings per share of $1.86. This was much better than analysts' average forecast for a loss per share of $0.42. With management once again reiterating in the quarterly update that its business has scaled to the point of being self-funding, the market's confidence in the company's growth story is improving. Apple Tech company Apple not only beat analyst expectations for its fiscal fourth quarter, but also provided better-than-expected guidance for its important holiday period. The strong results were helped by an acceleration in the growth rates of the company's two fastest-growing segments: services, and wearables, home, and accessories. Revenue in these two segments jumped 18% and 54%, respectively, year over year. Highlighting management's optimism for its business, the midpoint of Apple's revenue guidance range for its first quarter of fiscal 2020 implied 4% revenue growth. This would mark an acceleration from 2% growth in the fourth quarter of fiscal 2019. Apple stock is up more than 8% since its earnings report late last month. Walt Disney Shares of Disney also popped following the company's earnings report earlier this month. The market was impressed with the company's better-than-expected adjusted earnings per share of $1.07. On average, analysts had forecast earnings per share of $0.95 for the period. But the stock got another boost more recently when Disney announced that its new streaming service, Disney+, garnered over 10 million subscribers by Nov. 13 -- one day after its launch. The new service's momentum bodes well for Disney's ongoing efforts to beef up its direct-to-consumer positioning and become less reliant on traditional television. Shares of Disney are up more than 10% since the company reported its fiscal fourth-quarter results on Nov. 7. Find out why Apple is one of the 10 best stocks to buy now Motley Fool co-founders Tom and David Gardner have spent more than a decade beating the market. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has quadrupled the market.* Tom and David just revealed their ten top stock picks for investors to buy right now. Apple is on the list -- but there are nine others you may be overlooking. Click here to get access to the full list! *Stock Advisor returns as of June 1, 2019 Daniel Sparks has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Apple, Tesla, and Walt Disney and recommends the following options: long January 2020 $150 calls on Apple, short January 2020 $155 calls on Apple, long January 2021 $60 calls on Walt Disney, and short January 2020 $130 calls on Walt Disney. The Motley Fool has a disclosure policy.Source