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Market Insider | What's Shaking | Earnings to Watch | Before the Bell

Check out which companies are making headlines before the bell on Thursday:

Morgan Stanley - Morgan Stanley earned $0.61 per share, excluding certain items, for the first quarter, 11 cents above estimates. The firm's results were helped by a boost in stock trading revenue.

Verizon Communications - Verizon reported first-quarter profit of $0.68 per share, two cents above estimates, though revenue was slightly short of consensus. Wireless service margins did jump to a record, while subscriber growth came in at a net 677,000 customers.

UnitedHealth Group - The health insurance provider earned $1.16 per share for the first quarter, two cents above estimates, helped by stronger enrollment growth and higher profit margins at its Optum pharmacy benefits management unit.

(Read More: See the Day's Top Percentage Winners & Losers)

PepsiCo - The snack and beverage giant earned $0.77 per share for the first quarter, excluding certain items, six cent above estimates. Price increases helped boost profit margins during the quarter, and CFO Hugh Johnston told CNBC an expanded snack portfolio is doing very well in China.

Nokia - The smartphone maker did report a smaller-than-expected quarterly loss, but revenue was well short of estimates as sales plunged 25 percent compared to a year earlier.

AutoNation - The car retailer reported first-quarter profit of $0.68 per share, four cents above estimates, with revenue also above consensus. AutoNation saw increased demand for both new and used cars.

(Watch: Every Part of Our Business Improved: AutoNation CEO)

American Express - Amex reported first-quarter profit of $1.15 per share, three cents above estimates. Revenue was slightly below estimates, but Amex did allay concerns that the economy might curtail use of its cards.

EBay - EBay reported first-quarter profit of $0.63 per share, one cent above estimates, with revenue in line with consensus. However, the online auctioneer gave current-quarter guidance that fell short of Street estimates, as it lowered expectations for its European business.

Select Comfort - The company reported first quarter-earnings of $0.41 per share, missing estimates by two cents a share, and the mattress maker has also cut its full-year earnings outlook. Select Comfort said a change in marketing strategy was ineffective and that it plans to revert to its proven methods of advertising.

SanDisk - SanDisk reported first-quarter earnings of $0.84 per share, five cents a share above estimates, while revenue was slightly above forecasts. The memory chip and disk drive maker also raised revenue forecasts for the year on expectations of higher prices for memory chips used in smartphones and tablet computers.

General Motors - The automaker said its new diesel version of its Chevrolet Cruze gets 46 miles per gallon on the highway, outperforming some hybrids in that category.

LinkedIn - LinkedIn is unveiling an overhaul to its mobile application today, in an effort to enhance appeal for the increasing number of people using it on smartphones.

Toyota Motor - Toyota has been offered $146.5 million in tax breaks by the state of Kentucky to build the Lexus ES at its Georgetown plant, according to Reuters. The automaker will reportedly be unveiling a plan to do just that tomorrow.

LDK Solar - The solar panel maker has reported its seventh consecutive quarterly loss, just a few days of partially defaulting on a bond payment.

MetroPCS Communications - The wireless services provider has received the endorsement of proxy advisory firm ISS for its deal to merge with T-Mobile USA. That comes after another large proxy firm, Glass Lewis, also recommended that shareholders approve the deal.

(Read More: See CNBC's Market Insider Blog)

—By CNBC's Peter Schacknow

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