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Clifford Chance

Clifford Chance
Abigail Cessna

Abigail Cessna


Abigail Cessna

Abigail Cessna is an associate in the U.S. antitrust practice and a member of the Global Tech Group. She advises clients on compliance with the U.S. merger control laws, the regulatory review of mergers and acquisitions, antitrust investigations and antitrust issues related to intellectual property and technology licensing. Abigail's practice is particularly focused on the intersection of antitrust and technology.

Prior to joining the antitrust practice, Abigail advised on corporate matters, including mergers and acquisitions and joint ventures.

Abigail has represented clients across banking, private equity, technology, telecommunications and other industries.

Abigail publishes thought leadership on topics such as antitrust enforcement of technology companies and antitrust and blockchain.



Technology has disrupted financial services. The industry is being transformed. We can help you utilise technologies such as blockchain, smart contracts, artificial intelligence and big data to transform your operations, whilst considering the legal, ethical and practical risks.

Representative corporate engagements include:

  • Actis on the acquisition of solar plants in Latin America
  • Financial client on a joint venture divestiture of its Asia business
  • Foreign corporate investment into late series round of U.S. tech start-up financing

Representative antitrust engagements include:

  • S&P Global on the sale of its pricing and evaluations business to Intercontinental Exchange (ICE)
  • ICAP on the sale of its voice broking business to Tullet Prebon
  • SSO on standard setting antitrust compliance

News and client work

View all news and client work featuring Abigail Cessna

Contact details

About the Tech Group

Integrated and dynamic, our Tech Group is a single global team delivering strategic tech law advice to help clients stay ahead of the curve and outstrip the pace of change.

Career and qualifications

  • Drexel University (BA) 2012
  • Joined Clifford Chance 2014
  • Cornell Law School (JD) 2015
  • Admitted as an Attorney-at-Law in New York 2016
  • Admitted as an Attorney-at-Law in the District of Columbia 2018

Professional bodies

  • American Bar Association