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Are quarterly earnings released first via a press release on the investor website, via conference call, or does it vary by company?
Companies release their earnings reports over news agencies like Reuters, Dow Jones and Bloomberg before putting them on their website (which usually occurs a few minutes after the official dissemination of the report). This is because they have to make sure that all investors get the news at the same time (which is kind of guaranteed when official news channels are used). The conference call is usually a few hours after the earnings report release to discuss the results with analysts and investors.