WINNER: Edward Nathan Sonnenbergs

Finalists 2010: Al Tamimi & Company; Anjarwalla & Khanna; Edward Nathan Sonnenbergs; Galadari & Associates; Hadef & Partners; Oxford & Beaumont; Webber Wentzel

Edward Nathan Sonnenbergs (ENS) lays claim to be the largest full-service law firm in Africa and has continued to grow during the financial crisis. It has advised on many of the region's most notable corporate deals. It also has pro bono offices in two of South Africa's townships where staff do a minimum of 32 hours of legal work a year, which is considerably higher than the Law Society of South Africa's guideline commitment.

Important deals the firm has advised on include the R30bn (£2.8bn) merger between Momentum and Metropolitan Life to create one of the largest listed insurance companies in South Africa. The merger is viewed as an opportunity for both parties to make the merged entity more attractive to institutional investors, which may have shunned Metropolitan in the past due to its size relative to its peers.

The firm's commitment to both client and employee development is demonstrated by its running of an internal research unit, headed by Professor Dale Hutchinson of the University of Cape Town. As well as operating employee development programmes, the unit also holds seminars for clients. The firm has an active diversity and social responsibility programme. Among its initiatives is an educational trust that provides assistance to schools in disadvantaged areas of Gauteng and the Western Cape.

Meanwhile, the firm reports a strong financial performance that has allowed it to take on new staff and continue its regular programme of partner, senior associate and associate promotions.

In October this year it opened new offices in Durban and Stellenbosch.