Business Insider - An online news site focused on Business and technology.
CB Insights - This site is focused on providing information & data about the technology sector.
Crunchbase - Data on private and public companies, from start-ups to Fortune 500 companies
Inc 5000 - America's fastest-growing companies
Pitchbook - PitchBook is a leading resource for comprehensive data, research and insights spanning the global capital markets.
Red Herring Top 100 Overview - Top 100 private technology companies in three regions; good site to search for news about up and coming companies. Top 100 companies are announced in late spring for Asia, Europe, and North America.
Information about individual companies may often be found on each company's LinkedIn or Twitter pages, in addition to their websites.
Angel Capital Association - Explore the Knowledge Center to find important information for entrepreneurs
Angelist Venture - Explore the startup ecosystem; research fastest growing companies; find job opportunities; invest in startups.
Garage Technology Ventures - resources for getting started in finding financing; includes tips about what investors are looking for
OwnYourVenture - Includes an Equity Simulator
Bplans - provides free business plans, including financial plans that include samples of start-up funding, break-even analysis, pro forma profit and loss, pro forma cash flow, pro forma balance sheet, and ratio analysis.
Small Business Administration - includes information about starting a business, as well as loans, grants, and venture capital.
The Portable MBA in Entrepreneurship - an eBook from Bowman Library. See Chapter 6: Pro-Forma Financial Statements; Various Methods for Creating a Financial Construction Checklist; and Build a Sales Worksheet by Listing Major Sources of Revenue.