Mary Duffy

Mary is a former practicing attorney who is Global Head of AIG's Mergers & Acquisitions Insurance Group, specializing in Reps & Warranties Insurance (W&I), Tax Insurance and other insurance solutions to facilitate mergers and acquisitions. Mary joined AIG in 2011 after spending 15 years with Aon where she was Managing Director of Aon's Private Equity & Transaction Solutions Group. Prior to joining Aon, Mary was an associate at Morgan, Lewis & Bockius where she specialized in mergers and acquisitions, securities and general corporate law. Mary earned her J.D. from Georgetown University Law Center and her B.A. from Juniata College.
Contributed to


Insuring tax risk in transactions
Practice notes

This Practice Note looks at the situations in which tax risk insurance may be used, the risks that may be covered, the steps involved in a typical underwriting process and the key terms of a tax insurance policy. This Practice Note was produced in partnership with Mary Duffy of AIG.

Warranty and indemnity (W&I) insurance in M&A transactions
Practice notes

Produced in partnership with Mary Duffy of AIG. This Practice Note looks at the use of warranty and indemnity insurance (W&I insurance) policies in private M&A deals (whether share purchase transaction or asset purchase transaction) to cover losses from breach of the seller’s warranties and indemnities. It considers the strategic benefits of W&I policies (whether taken out by the buyer or the seller), the differences between buyer and seller coverage, key policy terms and the steps involved in the underwriting process.

Practice areas


  • Contributing Author

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