OldeOaks.com™ President Offers His Personal Microsoft Stock Certificate Specimen in Mint Condition Signed By William H. Gates aka Bill Gates The Founder and CEO of Microsoft. Rare Blue Design. Microsoft Issued Multiple Physical Versions Green, Blue, Signed By, Bill Gates, Steve Ballmer. In The 1990's Security Colombian And Microsoft Made An Estimated 50 Total Stock Certificates Were Issued in Multiple Issuances and Variations. Approximately 12 Physical Microsoft Stock Certificates Exist World-Wide in 2026.