The Shareowner Services business is a provider of transfer agency and employee equity plan services to US publicly listed companies.

BNY Mellon said that the transaction will further enhance its capital ratios, generating over $200m in additional capital and will result in a modest after-tax loss due to the impact of non-deductible goodwill associated with the business.

The Shareowner Services has nearly 950 transfer agent clients and about 200 employee equity plan clients, with operations major processing center and headquarters in Jersey City, New Jersey.

Computershare said that integration team will include senior management from both businesses and will be augmented by specialist Computershare staff drawn from around the world. The integration team will be responsible for managing the transition of the Business into Computershare.

Computershare CEO and president Stuart Crosby said that this is the largest acquisition in Computershare’s history.

The transaction is subject to regulatory approval and is expected to close in the third quarter of 2011.

Computershare is a provider of transfer agency, share registration, employee equity plans, proxy solicitation, stake holder communications, and other diversified financial and governance services.