Mercer Advisors, a California-based wealth management firm, has acquired local family office Duckworth Wealth Advisors for an undisclosed amount.

Newport Beach-based Duckworth offers investment management, financial planning, estate and tax planning, and corporate trustee services. The firm, founded by Michael Duckworth, oversees $160m in client assets.

"Mercer will play an important role in supporting our continued growth and scale while further strengthening our ability to meet the current and future needs of our clients," Duckworth said.

Mercer CEO David Barton said: "Duckworth is a wonderful and complementary fit to our national family office and greatly expands our Southern California footprint. Mike and his team have built an impressive and growing business and we look forward to helping expand their capabilities and drive continued growth.”

The deal is the sixth acquisition completed by Mercer in the last year, and will boost Mercer's assets under management to more than $9.6bn. The latest acquisition comes shortly after Mercer’s acquisition of New York City-based advisory business Novos Planning Associates.