Quilter has instructed Merrill Lynch International to handle the final £30m of its £100m share buyback programme which it plans to complete by November.
The wealth manager began the share buyback on 4 March to reduce the share capital of the company.
Repurchases under the programme to date total £70m, of which £55.3m was conducted on the London Stock Exchange and £14.7m on the Johannesburg Stock Exchange.
The first tranche was announced by the company on 4 March and a second tranche on 22 June. To date, 37.6m Quilter shares have been acquired, and cancelled, at an average price of 186p.
Merrill Lynch will buy Quilter shares on European trading venues, including the London Stock Exchange, and on the Johannesburg Stock Exchange between 8 September and 30 November.
Quilter will cancel the repurchased company shares.
The firm said the aim of the buyback was to return capital to shareholders.
Assets under management and administration as at 30 June for the wealth manager were £154.5bn, a 9% rise from the £141.9bn at 31 March.
Assets rose 25% year on year reflecting net inflows of £5.8bn and a recovery in the markets.
Quilter expanded its number of Financial Planners during the first half. The number of Quilter Restricted Financial Planners increased by nine to end the half at 1,462.