Possible Clues:

• Sponsor of quacking commercials
• Insurer with a duck icon
• Insurance company with a quacking mascot
• Ducky insurance co.?
• Insurance co. whose mascot is voiced by Gilbert Gottfried
• 'Ask about it at work' sloganeer, once
• Insurance company with a "spokesduck"
• Insurer with a duck
• Quacky insurance giant
• Company whose spokesduck is on Twitter