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 LLP

Penningtons Manches 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. San Francisco is an associated office.

Penningtons Manches LLP