Below are the links I recommend for Prospect Research:
Foundation & NonProfit Information
Foundation Directory Online (a service of Foundation Center; fee-based)
Foundation Search (fee-based)
GuideStar (free to view basic information with sign-up)
Kansas City Public Library - free library card entitles access to several online databases including Kansas City History (Missouri Valley collection), vital records, genealogy & history resources, business & nonprofit resources, and magazines & newspapers.
Rank and Filed - searchable SEC filings presented in a modern, graphic format
The Kansas City Star
The Kansas City Business Journal
The Independent - Kansas City's society and special event magazine
Kansas City Magazine - formerly 435 Magazine
These are multi-function websites for fundraisers and researchers which include capacity ratings, charitable giving, Dun & Bradstreet, Federal Election Contributions, Foundation Search, Guidestar Directors and Foundations, Hoover’s business information, Marquis Who’s Who, aircraft and large watercraft ownership, and more! Subscription price often includes monthly webinars and best practices white papers. Great for small research shops who need a lot of information quickly!