Varied perspectives help us to build constructive working relationships.

Portrait of David O'Brien


David is a partner in our London commercial dispute resolution team. He acts in all areas of commercial and general dispute resolution but has a particular interest in commercial contract disputes.

He is also an integral member of our professional negligence team with considerable expertise in handling professional negligence claims.

He has a growing specialism in acting for claimants in high value, multi-party actions against solicitors and is currently acting in three separate, multi-party professional negligence claims against legal practices. One of these is a claim for several purchasers of holiday homes in failed property developments in Calabria, Italy.

Recent work highlights

  • Acting in professional negligence proceedings to recover sums lost by several victims of a Ponzi fraud.
  • Defending proceedings for the alleged breach of an international distribution agreement.
  • Acting in injunction proceedings for a high profile individual.
  • Securing a successful judgment for a large number of claimants in Various Claimants v Giambrone and Law (a firm) and Others [2015], complex and high profile professional negligence proceedings relating to failed off-plan property purchases in Italy.
  • Acting for the claimant in Marksans Pharma Limited v Peter Beck and Partner GmbH [2015] in its successful claim for specific performance of a contract for the sale of $27 million worth of convertible bonds and defending a counterclaim for damages.

Penningtons Manches Cooper LLP

Penningtons Manches Cooper LLP is a limited liability partnership registered in England and Wales with registered number OC311575 and is authorised and regulated by the Solicitors Regulation Authority.

Penningtons Manches Cooper LLP