Katharine Moir advises leading private equity firms and companies on tax issues arising in their largest and most complex transactions.

Ms. Moir provides comprehensive tax counsel in connection with a range of domestic and international transactions and is widely recognized as a leading private equity tax lawyer. Her work includes advising on tax issues related to complicated US and international transactions, including:

  • Mergers and acquisitions
  • Joint ventures
  • Recapitalizations
  • Structured investments
  • Formation of private equity funds
  • Securities offerings

Ms. Moir regularly represents leading private equity firms, as well as top technology and other companies. Her experience spans a number of landmark and high-value deals — including advising Dell in the largest technology deal to date.

Prior to joining Latham, Ms. Moir served as a tax partner and head of the West Coast tax practice at a leading international law firm.

Ms. Moir’s experience includes advising:

  • Skillz in its pending US$150 million acquisition of Aarki
  • Okta in its US$6.5 billion acquisition of Auth0
  • Dell in its US$67 billion acquisition of EMC, the largest technology deal to date*
  • Hellman & Friedman in its US$1.2 billion acquisition of Checkmarx, an Israeli private company*
  • KKR in its US$2.2 billion acquisition of international operations from Campbell Soup Company*
  • Hellman & Friedman in its US$11 billion acquisition of Ultimate Software*
  • Calsonic Kansei (KKR portfolio company) in its US$7.1 billion acquisition of Magneti Marelli*
  • Silver Lake Partners in its US$3.5 billion acquisition of Blackhawk Networks*
  • Silver Lake Partners in its US$1.5 billion acquisition of First Advantage*
  • Hellman & Friedman in its acquisition of MultiPlan*
  • Silver Lake Partners and GIC in their US$2.6 billion strategic investment in Ancestry.com*
  • KKR in its US$1.2 billion sale of Alliance Tire Group to Yokohama Rubber*
  • Alibaba Group in its private acquisition of Youku Tudou*
  • Interactive Data Corporation in its US$5.2 billion acquisition by Intercontinental Exchange*
  • Microsoft Corporation in its US$19.75 billion debt offering*
  • Silver Lake in the establishment of Silver Lake Partners IV, L.P., with US$10.3 billion in total commitments, the largest amount ever raised for a technology investment-focused private equity fund*

*Matter handled prior to joining Latham

Bar Qualification

  • California
  • New York


  • JD, University of Chicago Law School, 1996
  • AB, Princeton University, 1992