Stocks making the biggest moves midday: Uber, Airbnb, MGM Resorts, Robinhood and more

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Check out the companies making headlines in midday trading.

Uber — Uber's shares jumped 11%, climbing to a new 52-week high, after the ride-hailing company announced an inaugural $7 billion share repurchase authorization program. Uber also said it expects gross bookings growth to be in the mid to high-teens over the next three years.

Lyft —  Shares of the ride-hailing platform surged 31% after the company posted adjusted earnings of 18 cents per share in the fourth quarter, more than the LSEG consensus estimate of 8 cents per-share earnings. Lyft reported revenue of $1.22 billion, which was in line with analysts' expectations.

IQVIA Holdings — The health tech company saw its shares rise 10% after it posted fourth-quarter earnings of $2.84 per share, excluding items, compared to the $2.82 per share expected by analysts, according to FactSet. Revenue of $3.87 billion for the quarter was slightly above estimates of $3.8 billion.

Charles River Laboratories — The drug maker gained 9% after fourth quarter adjusted earnings of $2.46 per share beat analysts' estimates of $2.40 per share, according to FactSet. Charles River posted $1.01 billion in revenue, while analysts anticipated $991.3 million. The higher end of the company's full-year earnings per share guidance, $11.40, was also above estimates of $10.83 per share.

DaVita — The health-care company jumped 7% after posting a beat on top and bottom lines. On Tuesday, DaVita posted earnings of $1.87 per share, ex-items, on $3.15 billion in revenue. Analysts polled by FactSet had estimated earnings of $1.63 per share on $3.01 billion in revenue.

Robinhood Markets — Shares of the trading platform jumped 9% after the company posted a surprise earnings and revenue