Possible Clues:

• Company whose name is quacked in ads
• Company whose mascot uses fowl language
• Quacked company name
• Official Partner of the Heisman Trophy
• Company that's proud of its quacks?
• Quacked insurance name
• Insurance giant with a spokesduck
• Company with a quacking mascot
• Insurance co. with a 'spokesduck'
• Georgia-based insurance giant