What is the Initial Public Offering dates for the following stocks, Proctor&Gamble and General Mills?

If you find this easy to answer, please give me your methods of researching it. Both stocks have been around for 90 to 100 years.

What is the Initial Public Offering dates for the following stocks, Proctor%26amp;Gamble and General Mills?
General Mills - June 20, 1928


P%26amp;G - 1890





I searched for "P%26amp;G history" and "General Mills history". Both led me to the company's history pages.
Reply:Go to each company's web site, and look at the investor relations pages. If the information is not there, contact their investor relations personnel. The web site will tell you how.