Check out the companies making headlines in midday trading: Expedia -- Shares of the online travel company soared nearly 15% after Expedia's fourth-quarter results outpaced Wall Street expectations. Expedia posted adjusted earnings of $2.39 per share on revenue of $3.18 billion, exceeding analysts' expectations for $2.04 per share in profit on $3.07 billion in revenue, according to LSEG. Expedia also reinstated its quarterly dividend at 40 cents per share. Amazon -- The e-commerce tech giant saw shares falling nearly 4% after the firm gave disappointing guidance for the current quarter. Amazon expects sales in the first quarter to be between $151 billion and $155.5 billion, compared to an LSEG estimate of $158.5 billion. The guidance anticipates an "unusually large, unfavorable impact" from foreign exchange rates, the company said. Amazon did report better-than-expected earnings and revenue for the fourth quarter, however. Doximity -- Shares surged 37% after Doximity, a digital platform for the medical industry, reported a fiscal third-quarter revenue beat . The company also said it expects revenue for its fiscal fourth quarter to come in between $132.5 million and $133.5 million, while analysts had estimated just $123.8 million. Bill Holdings -- The financial software stock slid 31% after revenue guidance for the current quarter came in below expectations. Bill said it expected between $352.2 million and $357.5 million for its fiscal third quarter. Analysts surveyed by LSEG were looking for $360.4 million. The guidance represents a sequential decline from the $363 million of revenue Bill reported for its fiscal second quarter. E.l.f. Beauty -- Shares of the cosmetics company lost nearly 20% after E.l.f. Beauty cut its guidance for the fiscal year and said it now sees sales ranging between $1.3 billion and $1.31 billion, which is below the consensus estimate of $1.34 billion, per StreetAccount. E.l.f.'s adjusted earnings for the third quarter also missed expectations, coming in at 74 cents per share while analysts polled by LSEG forecast 75 cents a share. Monolithic Power Systems -- Shares rose 7% after the semiconductor company topped fourth-quarter earnings and revenue expectations and issued better-than-expected revenue guidance for the current quarter. Monolithic Power Systems also announced a $500 million stock repurchase program and increased its quarterly dividend by nearly 25%. Take-Two Interactive Software -- Shares of the video game company soared 15% after the company announced Grand Theft Auto VI will come out this fall. Take-Two's net bookings for the fiscal third quarter came in at $1.37 billion, below the $1.39 billion expected by analysts polled by LSEG. Affirm -- Shares of the buy now, pay later loan provider rallied 22% after Affirm beat top- and bottom-line expectations for the fiscal second quarter . Affirm posted $866 million in revenue for the period, while analysts polled by LSEG forecast $807 million. The company also reported earnings of 23 cents per share, coming above estimates for a loss of 15 cents per share. Pinterest -- The social media stock climbed 17% on the back of its strong fourth-quarter results . Revenue grew 18% from the prior year, while net income came in at $1.85 billion, including a deferred tax benefit. The company said global monthly active users rose 11% year over year to 553 million during the period. Skechers -- Shares of the shoe company dropped 12% after its fourth-quarter earnings and revenue fell short of analysts' estimates. The company cited unfavorable foreign exchange headwinds, as well as ongoing weakness in its China market. Cloudflare -- The cloud cybersecurity company surged 20%. Cloudflare topped analysts' estimates in the fourth quarter, posting adjusted earnings of 19 cents per share on revenue of $460 million. LSEG consensus estimates called for 18 cents per share in earnings and $452 million in revenue. -- CNBC's Yun Li, Pia Singh, Jesse Pound and Lisa Kailai Han contributed reporting.