Baker McKenzie
120K client records from 47 offices worldwide exposed via compromised email gateway
Law Firm Data Breaches (95 indexed)
Allen & Overy
290K client records exposed in LockBit ransomware attack
Kirkland & Ellis LLP
Client M&A deal documents and litigation files exposed via compromised document management system
Gibson Dunn & Crutcher LLP
280K antitrust investigation records exposed via phishing attack on senior associates
Baker & Hostetler (Law Firm Sector)
Law firm cyberattacks nearly doubled in 2025 — average breach cost $5.08M
White & Case
180K client records compromised
Blake Cassels & Graydon
340K client records stolen in ransomware
Cassels Brock (Canada)
180K client records exposed
Sullivan & Cromwell
210K M&A deal records exposed
Skadden Arps Slate Meagher & Flom
350K M&A deal records exposed via compromised secure file sharing platform
Skadden Arps
210K M&A deal records exposed in targeted attack
Sidley Austin LLP
480K client records from regulatory investigations exposed via ransomware attack
Paul Weiss Rifkind
340K client records compromised
Osler Hoskin & Harcourt
180K M&A deal records exposed
Norton Rose Fulbright Canada
340K client records compromised in second incident
Latham & Watkins
340K client records compromised via vendor breach
Clifford Chance LLP
920K client records from international finance transactions exposed via email compromise
HWL Ebsworth (Australia)
4TB of client legal files stolen from top-10 Australian law firm by ALPHV ransomware
Jones Day
560K client records exposed in vendor breach
Thompson Coburn LLP
305K individuals affected — ransomware compromised client confidential legal files
Fasken Martineau
290K litigation records compromised
Freshfields Bruckhaus Deringer
670K records from antitrust investigations and merger reviews exposed via insider access
Davies Ward Phillips (Canada)
210K client records stolen
Berkeley Research Group
Ransomware during $700M leveraged buyout — M&A intelligence from hundreds of deals exposed