As of my last update in September 2021, I can provide you with the top 3 businesses by revenue, market capitalization, or any other metric. However, please note that this information might be outdated as the business landscape is constantly changing. For the most up-to-date rankings, I recommend checking recent financial reports and business publications. As of 2021, the top 3 businesses by market capitalization were:
Apple Inc. - An American technology company known for its iPhones, iPads, Mac computers, and various software and services.
Microsoft Corporation - An American multinational technology company primarily known for its Windows operating systems and productivity software, such as Microsoft Office.
Amazon.com Inc. - An American multinational technology company specializing in e-commerce, cloud computing, digital streaming, artificial intelligence, and more.
Keep in mind that these rankings can fluctuate over time based on various factors like financial performance, acquisitions, and industry trends. For the latest information, it's best to consult reliable financial sources.