Arthur J Gallagher & Company, an insurance brokerage and risk management services firm, has announced the acquisition of Oxygen Insurance Managers, from its parent, Oxygen Holdings. Terms of the transaction were not disclosed.

Oxygen Insurance Managers (OIM) is a Financial Services Authority (FSA) authorized underwriting agency representing a number of major insurance companies and Lloyd’s Syndicates, acting directly or through a local intermediary. OIM is engaged in international classes of insurance such as liability, extended warranty, cargo and specie, property, and group personal accident and travel.

Sian Fisher and her associates will continue to operate out of their current Fenchurch Street location as OIM Underwriting under the direction of David Ross, CEO of Arthur Gallagher UK, Gallagher’s FSA-authorized broker and approved Lloyd’s of London broker.

Patrick Gallagher, Jr, chairman, president and CEO of Arthur J Gallagher, said: OIM has a reputation of integrity, dedication and quality service provided by a highly experienced, respected team. Their areas of expertise will be a strong complement to our London operations, and we’re extremely pleased to welcome Sian and her team to our growing Gallagher family of professionals.