Check out the companies making headlines before Bell: Modanya – The biotech company has retreated 4% after losing $2.91 per share in the fourth quarter. However, the company beat analysts’ expectations for quarterly revenue. GameStop – The stock rose 8% after a source familiar with the issue told CNBC that video game retailers were considering investing in Bitcoin and other cryptocurrencies. The company is determining whether this is sensible as a business move, a source said. Roku – Streaming inventory jumped 14%, surpassing fourth quarter expectations. Roku lost 24 cents per share, but analysts voted by LSEG said they expect a loss of 40 cents per share. The company recorded revenue of $1.2 billion, while Street was penciling for just $1.15 billion. Airbnb – Shares rose more than 13% after Airbnb posted top-line and bottom-line beats in the fourth quarter. The vacation rental company reported a profit of 73 cents per share with revenues of $2.48 billion. Analysts surveyed by LSEG had forecast profits of 58 cents per share and revenues of $2.42 billion. Informatica – Shares plummeted 33% after the cloud data management company issued tough forecasts for the quarter. Informatica looks at first quarter revenues ranging from $380 million to $400 million, below the expected $412 million for analysts voted by LSEG. The full-year revenue guidance also fell below expectations, with the company forecasting revenues between $1.67 billion and $1.72 billion, below the consensus estimate of $1.78 billion. Applied Materials – The semiconductor company slid 4.8% after offering a soft-planned revenue outlook that overshadows quarterly results that beat analyst expectations. Twilio – Cloud telecommunications inventory fell 8.8% due to weak revenue guidance. Twilio told investors that it expects earnings per share between 88 cents and 93 cents in the first quarter, based on a 99 cents-per-share forecast from analysts voted by LSEG. Palo Alto Networks – Tech stocks have fallen more than 4.4% after recent quarterly estimates of free cash flow results. Palo Alto reported $559.4 million in second quarter free cash flow, with analysts voted by FactSet looking for $694.9 million. The company provided the best estimates of adjusted earnings and revenue per share. DAVITA – The dialysis provider shares have slid 9% after the company issued a weak outlook amid rising costs of care. Davita expects adjusted earnings per share to be between $10.20 and $11.30 per share. Big Investor Berkshire Hathaway offloaded some shares in a pre-planned agreement. DEXCOM – The medical device manufacturer popped 3% after reassessing its full-year revenue guidance, despite the analysts voted by FactSet being slightly lower than expected. Dexcom also posted revenue of $11.1 billion in the fourth quarter. This is in line with the street estimate. DraftKings – Shares rose 5.4% after sports betting companies raised the bottom edge of their full-year revenue guidance. Currently, we expect revenues to be between $6.3 billion and $6.6 billion, with a midpoint of $6.45 billion. Analysts voted by LSEG had expected annual revenues of $63.9 billion. Draftking’s fourth quarter results did not reach street estimates. COINBASE – Crypto Marketplace slipped 2.5% despite revenue gains ahead of forecasts. Coinbase scored $4.68 per share with revenue of $2.27 billion, while analysts voted by LSEG expected $1.81 per share and revenue of $1.88 billion. – Hakyung Kim, Yun Li, Michell Fox, Sarah Min and Jesse Pound of CNBC contributed the report.